Proactiveinvestors Australia Great Boulder Resources Ltd https://www.proactiveinvestors.com.au Proactiveinvestors Australia Great Boulder Resources Ltd RSS feed en Mon, 24 Jun 2019 23:33:12 +1000 http://blogs.law.harvard.edu/tech/rss Genera CMS action@proactiveinvestors.com (Proactiveinvestors) action@proactiveinvestors.com (Proactiveinvestors) <![CDATA[News - Great Boulder Resources appoints Andrew Paterson as managing director ]]> https://www.proactiveinvestors.com.au/companies/news/221509/great-boulder-resources-appoints-andrew-paterson-as-managing-director-221509.html Great Boulder Resources Ltd (ASX:GBR) has appointed Andrew Paterson as managing director and he will begin in this role on June 24, 2019.

Paterson is currently chief geological officer and a director of Kingston Resources which is developing the Misima Silver-Gold Project on Misima Island in Papua New Guinea.

He has more than 25 years’ experience in mining and exploration in Australia and PNG and is well credentialed to lead the company into the future with a career spanning gold, nickel, iron ore and lithium sectors.

READ: Great Boulder Resources drilling highlights growing potential of Winchester JV

Paterson said: “I’m excited about this opportunity and look forward to leading Great Boulder into a bright future.

“I can see that the board is passionate about the company’s success and we have some impressive geological firepower behind us.

“With that level of enthusiasm and experience in the team, I’m confident we can build on the company’s earlier work and deliver exploration success.”

READ: Great Boulder Resources plans next steps for copper-nickel-cobalt

Great Boulder chairman Greg Hall, who will continue to act as interim chief executive officer until June 24, welcomed Paterson to the team and looks forward to working with him.

Last month the company intersected strong nickel-copper-PGE anomalism, highlighting the growing potential of the Winchester JV in WA’s Yamarna region.

Great Boulder’s aircore drilling program extended known anomalism to more than 25 kilometres and this includes grades of up to 1.1% copper, 0.7% nickel and 0.04% cobalt.

This has resulted in the company meeting the first milestone in the Winchester JV with Ausgold Ltd (ASX:AUC), thereby earning 51% of the project.

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Wed, 05 Jun 2019 10:31:00 +1000 https://www.proactiveinvestors.com.au/companies/news/221509/great-boulder-resources-appoints-andrew-paterson-as-managing-director-221509.html
<![CDATA[News - Great Boulder Resources drilling highlights growing potential of Winchester JV ]]> https://www.proactiveinvestors.com.au/companies/news/220638/great-boulder-resources-drilling-highlights-growing-potential-of-winchester-jv-220638.html Great Boulder Resources Ltd (ASX:GBR) has intersected strong nickel-copper-PGE anomalism which highlights the growing potential of the Winchester Joint Venture Project in WA’s Yamarna region.

The company’s latest aircore drilling campaign has extended known anomalism to more than 2.5 kilometres and this includes grades of up to 1.1% copper, 0.7% nickel and 0.04% cobalt.

This work has resulted in Great Boulder meeting the first milestone in the Winchester JV with Ausgold Ltd (ASX:AUC) and earning 51% of the project.

READ: Great Boulder Resources enters JV for Winchester Nickel-Copper Project

Great Boulder has the option to earn a further 24% for a total of 75% by spending an additional $250,000 over four years.

Shares were up almost 6% to an intra-day high of 7.6 cents.

Winchester is 40 kilometres north of Great Boulder’s Yamarna project, which comprises the Mt Venn and the Eastern Mafic deposits.

Great Boulder Resources exploration projects in the Yamarna region.

Based on metallurgical tests from Mt Venn, the high nickel-tenor at Winchester makes it attractive as a blend for Great Boulder’s Yamarna project along with its potential to host higher grade nickel mineralisation.

READ: Great Boulder Resources plans next steps for copper-nickel-cobalt portfolio

The Winchester aircore campaign comprised a total of 118 holes for 3,776 metres drilled on a wide-spaced grid with the aim of verifying and improving interpreted stratigraphy.

Downhole assay results have identified a significant zone of coincident nickel, copper and PGE anomalism over a strike extent of almost 3 kilometres.

Maximum nickel values define a plus-1500ppm anomaly coincident with plus-100ppm copper and plus-10ppb PGE anomalism.

This geochemical anomaly extends from the Winchester prospect in the north to the southern tenement boundary.

READ: Great Boulder Resources drills new zones of sulphide mineralisation at Eastern Mafic

Concurrently, the company has completed a high-resolution ground gravity survey at the JV to assist with geological interpretation.

Winchester JV and Great Boulder 100% tenement boundaries overlain on RTP aeromagnetic data.

Previous drilling at Winchester identified significant nickel-copper-cobalt-PGE mineralisation, including 19 metres at 0.6% copper, 0.3% nickel and 0.02% cobalt from 106 metres and 13 metres at 0.9% copper, 0.3% nickel and 0.02% cobalt from 138 metres.

Great Boulder has started planning for a follow-up drill program.

New tenement granted

A new exploration tenement located south along strike from the Winchester prospect and owned 100% by Great Boulder has been granted for an initial five-year term.

The recently delineated geochemical anomaly is open to the south and trends onto this newly granted tenement.

Great Boulder plans to extend future work plans onto the new tenements once all regulatory approvals are in place.

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Tue, 21 May 2019 12:33:00 +1000 https://www.proactiveinvestors.com.au/companies/news/220638/great-boulder-resources-drilling-highlights-growing-potential-of-winchester-jv-220638.html
<![CDATA[News - Great Boulder Resources plans next steps for copper-nickel-cobalt portfolio ]]> https://www.proactiveinvestors.com.au/companies/news/219143/great-boulder-resources-plans-next-steps-for-copper-nickel-cobalt-portfolio-219143.html Great Boulder Resources Ltd (ASX:GBR) is an exploration company with Western Australian gold assets and an emerging focus on nickel and copper projects.

The Western Australian company is undergoing a period of leadership change with managing director Stefan Murphy to depart on May 3, 2019, to head up British Marine (Britmar) and Britmar (Aus) Pty Ltd subsidiary Nathan River Resources as it seeks to reopen Roper Bar iron ore mine in the Northern Territory.

Great Boulder non-executive chairman Greg Hall is due to take up an interim CEO role on May 3 as the Applecross-based company seeks a new leader with nickel and copper exploration experience.

Murphy is a geologist with 16 years of mining industry experience while Hall is also a geologist who has 45 years of mining and exploration experience.

What does Great Boulder Resources own?

Great Boulder’s copper-nickel-cobalt assets include a number of projects in the Mt Venn-Yamarna region of WA near the northern Goldfields town of Laverton, previously known as British Flag, and Gold Road Resources Ltd’s (ASX:GOR) future gold mine Gruyere.

The company groups its Mt Venn and Yamarna (Eastern Mafic) projects as the Yamarna copper-nickel-cobalt assets.

Great Boulder has a number of other assets in the Goldfields region of WA and last year took an option over the Mt Carlon project, 60 kilometres south of Mt Venn, from Gold Road.

The Great Boulder neighbour is developing its Gruyere Gold Project as Australia’s next major gold mine with a high-profile joint venture partner, Gold Fields Limited (NYSE:GFI) (JSE:GFI).

Gruyere’s roll-out is expected to help improve road, power and water infrastructure in the area.

Like Gold Road, Great Boulder has taken a partnering approach to project advancement, holding the Mt Venn project 130 kilometres east of Laverton in the Eastern Goldfields district with a JV partner.

Great Boulder has a 75% majority interest in Mt Venn project under the JV agreement, while partner Eastern Goldfields Mining Company Pty Ltd (EGMC) holds a 25% stake.

The parties contribute to project expenditure at a percentage that reflects their stakes.

Mt Venn features six granted exploration licences and one granted prospecting licence.

The Mt Venn JV has identified extensive copper-nickel-cobalt mineralisation at Mt Venn over several kilometres.

This includes multiple lenses of copper-dominant near-surface mineralisation which may make the project suitable for open pit mining.

A simplified flowsheet for Mt Venn metallurgical test work was designed and advanced through metallurgical testing, demonstrating that copper sulphide concentrate and cobalt-nickel sulphate products could be produced for the battery metals markets.

A complementary project to Mt Venn for Great Boulder in the area is Yamarna.

Great Boulder has drilled Yamarna project and found new zones of sulphide mineralisation in Eastern Mafic complex, as reported earlier this week.

Eastern Mafic is a very large mafic intrusion just 7 kilometres from Mt Venn that is associated with the same magmatic event.

The drilling was co-funded by the Western Australian Government under its Department of Mines, Industry Regulation and Safety (DMIRS)-managed Exploration Incentive Scheme (EIS) program and took in 2,117 metres and included reverse circulation (RC) and diamond drill holes.

Highlighted results included 4.5 metres grading 0.2% copper, 0.3% nickel from 85 metres; 8 metres grading 0.3% copper, 0.1% nickel from 28 metres; and 3.1 metres grading 0.5% copper, 0.1% nickel from 554 metres.

The company had tested extensions to known sulphide mineralisation at Zermatt, Cortina and ML 13 and discrete EM and geochemical anomalies as potential feeder structures on the western side of the main intrusion, the Western Anomaly.

Next steps for Great Boulder include collating assay and geophysical data to plan the next phase of RC and diamond drilling into newly-defined EM conductors at Eastern Mafic.

The company’s gold assets include Tarmoola Gold Project near Leonora in WA, which features a 2-kilometre high-grade gold trend, and Jundee Gold Project, 10-kilometres along strike from Jundee gold mine.

What is Great Boulder Resources’ reporting schedule?

Great Boulder reports its annual results to shareholders on a financial year basis, last filing its annual results in September 2018.

The company produces half-yearly reports, last reporting half-year results in March 2019.

Great Boulder’s next quarterly activities and cashflow report is expected by the end of April 2019.

Inflection points

MD/CEO appointment and resulting milestones

Commencement and results from Eastern Mafic conductor drilling

Development of Mt Venn-Yamarna region and Goldfields areas with emergence of Gruyere

Copper, nickel, cobalt and gold sector pricing dynamics and sentiments

Outgoing managing director Stefan Murphy highlights battery metals suitability

“The latest [metallurgical test work] results demonstrate a robust, reliable flowsheet developed in the preliminary metallurgical program can produce readily marketable copper and nickel-cobalt sulphide concentrates,” managing director Stefan Murphy wrote on behalf of the board in last month’s December half-year report for 2018.

“High overall copper recovery of more than 90% [was] achieved in the flotation and leach circuit to produce a more than 20% saleable copper sulphide concentrate.

“Exceptionally high-value nickel-cobalt sulphide concentrate [was] produced grading 26% nickel and 9% cobalt, suitable for use in the battery and electric vehicle markets.

“Overall nickel and cobalt recoveries approaching 80% in a combined nickel-cobalt sulphide product [was] demonstrated in these initial trials.”

 

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Fri, 26 Apr 2019 13:00:00 +1000 https://www.proactiveinvestors.com.au/companies/news/219143/great-boulder-resources-plans-next-steps-for-copper-nickel-cobalt-portfolio-219143.html
<![CDATA[News - Great Boulder Resources drills new zones of sulphide mineralisation at Eastern Mafic ]]> https://www.proactiveinvestors.com.au/companies/news/218987/great-boulder-resources-drills-new-zones-of-sulphide-mineralisation-at-eastern-mafic-218987.html Great Boulder Resources Ltd (ASX:GBR) has received results from drilling at the Eastern Mafic complex within the Yamarna Project in Western Australia.

A total of 7 reverse circulation (RC) and diamond drill holes were completed for 2,117 metres testing extensions to known sulphide mineralisation at Zermatt, Cortina and ML 13.

Discrete EM and geochemical anomalies on the western side of the main intrusion known as the Western Anomaly were also tested as potential feeder structures.

Results include 4.5 metres at 0.2% copper, 0.3% nickel from 85 metres, 8 metres at 0.3% copper, 0.1% nickel from 28 metres, and 3.1 metres at 0.5% copper, 0.1% nickel from 554 metres.

READ: Great Boulder Resources enters JV for Winchester Nickel-Copper Project

Great Boulder is collating all assay and geophysical data to plan the next phase of RC and diamond drilling into the newly defined EM conductors at the Eastern Mafic.

New drill holes (red) and previous significant intersections (yellow). Contour lines show gravity
highs.

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Wed, 24 Apr 2019 09:13:00 +1000 https://www.proactiveinvestors.com.au/companies/news/218987/great-boulder-resources-drills-new-zones-of-sulphide-mineralisation-at-eastern-mafic-218987.html
<![CDATA[News - Great Boulder Resources enters JV for Winchester Nickel-Copper Project ]]> https://www.proactiveinvestors.com.au/companies/news/216333/great-boulder-resources-enters-jv-for-winchester-nickel-copper-project-216333.html Great Boulder Resources Ltd (ASX:GBR) has executed a joint venture agreement with Ausgold over the Winchester Nickel-Copper Project near Laverton in Western Australia.

Great Boulder is earning up to 75% of Winchester through expenditure of $500,000 over four years, with around $100,000 already spent.

Based on metallurgical tests from GBR's nearby Mt Venn project, the high nickel-tenor at Winchester makes it particularly attractive as a blend for Great Boulder's Yamarna project along with its potential to host higher grade nickel mineralisation.

READ: Great Boulder test work shows strong nickel cobalt copper recoveries

Great Boulder managing director Stefan Murphy said the Winchester project could play an important role in the company’s strategy to establish a substantial copper-nickel-cobalt operation.

“The Winchester project represents part of a large igneous province with magmatic sulphide mineralisation now identified over a vast area," he said.

“Only a very small area has been drill tested at Winchester and the presence of high-grade copper and nickel mineralisation, confirmed through petrography, is extremely promising.

“Combining Winchester with our Mt Venn and Eastern Mafic deposits at Yamarna is an important step in building a consolidated copper-nickel-cobalt business for the region.”  

READ: Great Boulder Resources commences diamond drilling at Eastern mafic targeting deep feeder zone

Ausgold managing director Matthew Greentree said: “Great Boulder has shown a commitment to exploration in the region and has committed to spend $500,000 to earn 75% of the Yamarna project.

“The joint venture is structured so Ausgold retains a 25% free-carried interest through to a decision to mine, allowing Ausgold to focus its funds on its 100%-owned Katanning Gold Project, where the company continues to have exploration success and is progressing towards a mine development of the 1.04-million-ounce gold resource.”

READ: Great Boulder Resources makes steady progress across copper nickel cobalt expansion

Exploration activities are underway at Winchester with a 3,400-metre aircore geochemistry drilling program beginning this week and a tenement-wide ground gravity survey to start in coming weeks.

The geochemistry and gravity data will be used in conjunction with other geophysical data to map prospective intrusions and identify nickel-copper mineralisation.

Recent field mapping and a review of previous RC drilling highlighted that most drill holes have not intersected the prospective mafic-ultramafic units.

A follow-up RC drill program will be planned once the aircore drilling and gravity survey are completed.

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Wed, 13 Mar 2019 12:08:00 +1100 https://www.proactiveinvestors.com.au/companies/news/216333/great-boulder-resources-enters-jv-for-winchester-nickel-copper-project-216333.html
<![CDATA[News - Great Boulder test work shows strong nickel cobalt copper recoveries ]]> https://www.proactiveinvestors.com.au/companies/news/215753/great-boulder-test-work-shows-strong-nickel-cobalt-copper-recoveries-215753.html Great Boulder Resources Ltd (ASX:GBR) has received results from metallurgical test work completed on samples from the Mt Venn deposit within its Yamarna Project in Western Australia.

The primary purpose of the test work was to demonstrate a viable flowsheet that would maximize recovery for multiple, high-value products containing copper, nickel and cobalt.

The leaching circuit recovered over 90% of nickel and cobalt from pyrrhotite and also captured the majority of copper rejected from the floatation circuit increasing overall copper recovery to over 90%.

Notably, the test work was completed on a relatively low-grade sample, containing 0.43% copper, 0.18% nickel and 0.06% cobalt.

READ: Great Boulder Resources answers ASX query on price and volume increase

Great Boulder’s managing director Stefan Murphy said: “These results show that high-quality concentrates can be produced at high recoveries from sulphide mineralisation at Mt Venn

“Our preference to pursue a combined nickel-cobalt sulphide concentrate has demonstrated an exceptional high value product can be produced, with scope to further improve concentrate grade through process optimisation.

“These results are based on early drilling from Mt Venn before the Eastern Mafic was discovered and we are confident that the higher nickel grades we are seeing at the Eastern Mafic and nearby Winchester deposits will further improve overall recoveries.”

READ: Great Boulder Resources commences diamond drilling at Eastern Mafic targeting deep feeder zone

The Yamarna project hosts the Mt Venn deposit as well as the nearby emerging Eastern Mafic complex target.

Last month, Great Boulder commenced drilling four deep diamond holes at the Eastern Mafic complex with results pending.

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Tue, 05 Mar 2019 09:05:00 +1100 https://www.proactiveinvestors.com.au/companies/news/215753/great-boulder-test-work-shows-strong-nickel-cobalt-copper-recoveries-215753.html
<![CDATA[News - Great Boulder Resources answers ASX query on price and volume increase ]]> https://www.proactiveinvestors.com.au/companies/news/215008/great-boulder-resources-answers-asx-query-on-price-and-volume-increase-215008.html Great Boulder Resources Ltd (ASX:GBR) received a query from the ASX today related to the company’s shares rising from 14 cents at the close of trading on Tuesday to a high of 20 cents today.

The ASX also noted the significant increase in the volume of Great Boulder securities traded during the same period.

Great Boulder responded to the query explaining that it was not aware of any information that had not been released to the market which, if known, could be an explanation for recent trading in the securities of the company.

READ: Great Boulder Resources commences diamond drilling at Eastern Mafic targeting deep feeder zone

Great Boulder did note its announcement made on Monday regarding the commencement of drilling at the Eastern Mafic complex.

Although the company considers the targets being drilled as part of this program are highly prospective, no results have been received from this program to date.

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Thu, 21 Feb 2019 15:12:00 +1100 https://www.proactiveinvestors.com.au/companies/news/215008/great-boulder-resources-answers-asx-query-on-price-and-volume-increase-215008.html
<![CDATA[News - Great Boulder Resources commences diamond drilling at Eastern Mafic targeting deep feeder zone ]]> https://www.proactiveinvestors.com.au/companies/news/214754/great-boulder-resources-commences-diamond-drilling-at-eastern-mafic-targeting-deep-feeder-zone-214754.html Great Boulder Resources Ltd (ASX:GBR) has commenced diamond drilling at the Eastern Mafic complex within the Yamarna Project in Western Australia.

Four diamond drill holes are planned to penetrate deep into the mafic complex at Zermatt, Cortina, ML 13 and Ben Lomond.

Drilling is targeting a possible nickel-copper feeder zone to the Eastern Mafic complex at depth.

High-grade nickel sulphide deposits are typically located in conduit systems of large mafic complexes, such as Nova-Bollinger, Voisey’s Bay and Nebo-Babel.

READ: Great Boulder Resources prepares for deeper drilling of nickel-rich Eastern Mafic target

The drill program aims to identify additional mafic intrusions with high-tenor nickel and copper sulphide mineralisation, which are key to the formation of high-grade sulphide deposits.

Drilling will also test the modelled extents of the Eastern Mafic complex and try to identify the base of the intrusion where accumulations of massive sulphide mineralisation may form.

Down-hole EM also planned

Down-hole electromagnetics (DHEM) surveys will be completed on all drill holes.

DHEM has successfully detected massive sulphide mineralisation over 200 metres from the drill hole in previous drilling and will be a key exploration tool in testing deeper targets at the Eastern Mafic.

First hole at Zermatt underway

The drill hole at Zermatt is planned as a 510-metre diamond tail off a 190-metre existing RC hole, reaching a target depth of 700 metres downhole and 600 metres below surface.

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Mon, 18 Feb 2019 09:38:00 +1100 https://www.proactiveinvestors.com.au/companies/news/214754/great-boulder-resources-commences-diamond-drilling-at-eastern-mafic-targeting-deep-feeder-zone-214754.html
<![CDATA[News - Great Boulder Resources prepares for deeper drilling of nickel-rich Eastern Mafic target ]]> https://www.proactiveinvestors.com.au/companies/news/212444/great-boulder-resources-prepares-for-deeper-drilling-of-nickel-rich-eastern-mafic-target-212444.html Great Boulder Resources Ltd (ASX:GBR) will start a new drilling program within a month to test higher-grade nickel targets at depth at Eastern Mafic nickel-copper-cobalt deposit within the Yamarna project in WA.

A revised geological model based on geophysics and drilling completed in the December quarter infers that the Eastern Mafic intrusion was formed at depth and the deep drilling will test this theory.

READ: Great Boulder Resources to test core of nickel target with deep drilling

The company believes that drilling to date, which has returned encouraging copper, nickel and cobalt results, has only intersected the top of the intrusion, leaving the main body untested.

Evidence indicates that nickel grades increase at depth and the upcoming diamond drilling will take place under the conductors at Zermatt, ML13 and Ben Lomond.

READ: Great Boulder Resources gains further evidence of Eastern Mafic potential, adds PGEs to the mix

Elevated platinum group elements (PGE) have also been intersected at Ben Lomond and ML13 which have potential to provide by-product credits.

Great Boulder’s Yamarna project and Winchester and Mt Carlon projects, which are under option agreements.

Up to four diamond holes are planned in the program, which is co-funded by the Western Australian Government.

Great Boulder is funded for the planned exploration and at December 31, 2018, had $1.8 million in cash after receiving an R&D rebate of $827,000 in December.

Assisted by WA EIS scheme

A WA Government Exploration Incentive Scheme (EIS) grant of $150,000 has been approved and will be received by the end of this quarter after the deep drilling is completed.

The company also plans to continue exploring at the Winchester joint venture project with Ausgold Ltd (ASX:AUC), 40 kilometres north of the Yamarna project.

The project exhibits an increase in nickel tenor which makes it an attractive target to provide potential higher-grade blend for Yamarna’s Mt Venn and Eastern Mafic deposits.

Further activities at Winchester will begin once the tenement’s extension of term is granted and a formal joint venture with Ausgold is executed.

Winchester drill hole plan showing interpreted geology and significant intercepts.

READ: Great Boulder Resources produces high-quality copper-nickel-cobalt products from Mt Venn

At the advanced Mt Venn project west of Eastern Mafic metallurgical test work is generating high purity copper, nickel and cobalt products.

Several optimisation steps were undertaken in the December quarter, focused on simplifying the nickel and cobalt flowsheet to produce a high-grade combined nickel-cobalt sulphide product rather than separate nickel sulphide and cobalt sulphate products.

This would remove the capital and operating costs associated with a solvent extraction plant for the sulphate production and improve overall handling and freight costs associated with two simple sulphide products.

New test work results expected

Results from the updated metallurgical test work are expected in February.

Once a final product mix is selected, further metallurgical samples will be collected from the Eastern Mafic, Mt Venn and Winchester to generate a representative sample for optimisation test work.

Drilling at Mt Venn continues to intersect wide zones of copper dominant mineralisation.

These have now been defined over 1 kilometre of strike and remain open along strike and downdip.

Great Boulder is now assessing further strike extensions along the Mt Venn mineralised trend to the north and south where limited previous drilling has been undertaken.

Once the full extent of mineralisation is mapped the company will begin resource definition drilling.

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Mon, 14 Jan 2019 10:39:00 +1100 https://www.proactiveinvestors.com.au/companies/news/212444/great-boulder-resources-prepares-for-deeper-drilling-of-nickel-rich-eastern-mafic-target-212444.html
<![CDATA[Media files - Great Boulder Resources MD discusses upcoming drilling, metallurgical test work ]]> https://www.proactiveinvestors.com.au/companies/stocktube/11576/great-boulder-resources-md-discusses-upcoming-drilling-metallurgical-test-work-11576.html Tue, 11 Dec 2018 16:24:00 +1100 https://www.proactiveinvestors.com.au/companies/stocktube/11576/great-boulder-resources-md-discusses-upcoming-drilling-metallurgical-test-work-11576.html <![CDATA[News - Great Boulder Resources to test core of nickel target with deep drilling ]]> https://www.proactiveinvestors.com.au/companies/news/210911/great-boulder-resources-to-test-core-of-nickel-target-with-deep-drilling-210911.html Great Boulder Resources Ltd (ASX:GBR) will embark on a deep drilling program at the Eastern Mafic nickel-copper-cobalt deposit within the Yamarna Project in Western Australia.

The planned drilling comes after the company recently completed a revised geological interpretation based on the latest drilling and geophysical results.

The deeper drilling is aimed at testing the core of the Eastern Mafic intrusion, where the conduit system and primary target for high-grade nickel sulphide is interpreted to be located.

Drilling is expected to commence early in the new year after site clearances and permits are received.

READ: Great Boulder Resources gains further evidence of Eastern Mafic potential, adds PGEs to the mix

In addition to testing the deeper targets, near-surface extensions of mineralisation will also be tested to determine the potential for open pit mineralisation at the Eastern Mafic.

This would complement shallow sulphide mineralisation at the adjacent Mt Venn deposit.

Shallow drilling will further explore the extent of sulphides intersected at the Zermatt and Cortina prospects.

Great Boulder’s flagship project is the 75% owned Yamarna Project located northeast of Laverton in Western Australia.

Yamarna comprises the more advanced Mt Venn nickel-copper-cobalt discovery and the adjacent emerging Eastern Mafic copper-nickel-cobalt deposits.

The maiden 30-hole reverse circulation (RC) drill program at Eastern Mafic recently confirmed a new magmatic sulphide system.

The Mt Venn and Eastern Mafic Complex are interpreted to represent large-scale copper-nickel-cobalt magmatic systems.

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Tue, 11 Dec 2018 11:28:00 +1100 https://www.proactiveinvestors.com.au/companies/news/210911/great-boulder-resources-to-test-core-of-nickel-target-with-deep-drilling-210911.html
<![CDATA[News - Great Boulder Resources gains further evidence of Eastern Mafic potential, adds PGEs to the mix ]]> https://www.proactiveinvestors.com.au/companies/news/208887/great-boulder-resources-gains-further-evidence-of-eastern-mafic-potential-adds-pges-to-the-mix-208887.html Great Boulder Resources Ltd (ASX:GBR) has refined exploration targets at the Eastern Mafic project in WA with drilling returning increased nickel, copper, cobalt and platinum group element (PGE) grades.

Recent drilling has further improved understanding of mineralisation at the project with the platinum and palladium results having potential to provide valuable by-product credits.

The company has also received strong copper and nickel results with associated gold and PGEs at the Winchester prospect, around 40 kilometres north of Eastern Mafic and the more advanced Mt Venn project.

Great Boulder managing director Stefan Murphy said the company’s growing knowledge of the mineralised system was resulting in significantly better results with each phase of drilling.

“As we get a better handle on the controls of mineralisation we have been able to prioritise drilling areas in what is clearly an extensive mineralised province,” he said.

READ: Great Boulder Resources to outline copper-nickel-cobalt strategy at Proactive CEO Sessions

Murphy will outline these results as well as the company’s strategy covering the prospective Yamarna region of WA during the Proactive CEO Sessions this month in Sydney and Melbourne.

Results confirm that the Cortina prospect, 600 metres west of Zermatt and within the ‘neck’ of the intrusion, contains significant copper, nickel and cobalt mineralisation.

Elevated PGE grades

Copper, nickel and PGE mineralisation was intersected within the feeder zone, with grades up to 3.1% copper, 0.6% nickel and 0.64 g/t PGE at anomaly ML13 and 0.7% nickel, 0.15 g/t PGE and 0.08% cobalt at Ben Lomond.

Best results from recent Eastern Mafic drilling.

The elevated PGE grades are commonly associated with magmatic nickel sulphide deposits.

With copper, nickel and cobalt sulphide confirmed along the feeder zone and neck of the intrusion, exploration will now focus on these parts of the mafic intrusion.

READ: Great Boulder Resources closes in on higher-grade nickel at Eastern Mafic

Murphy said: “It is still early days at the Eastern Mafic but the results confirm we are closing in on the higher-grade part of the system, with our efforts now focused along the 5-kilometre-long feeder zone and the neck of the intrusion at Zermatt and Cortina.

“We have multiple conductors to test along this prospective part of the Eastern Mafic as well as conductors at depth that have been identified in DHEM modelling.”

Conductors to be assessed

These untested EM conductors along the prospective intrusion will now be assessed for drilling.

In addition, several DHEM conductors have been identified from the latest survey that require drill testing.

The new DHEM conductors will be incorporated in geological modelling that is underway.

Airborne EM over magnetic image showing intrusion target (white) and untested conductors.

READ: Great Boulder Resources makes steady progress across copper, nickel, cobalt exploration portfolio

Once the geometry of the intrusive complex and prospective host units are defined, the next phase of drilling can target basal accumulations of higher-grade nickel, copper and cobalt sulphide mineralisation.

Strong Winchester results

At Winchester, two reverse circulation holes for 388 metres were drilled, both using planned holes generated from modelled DHEM conductor plates.

This project forms part of an option agreement with Ausgold Ltd (ASX:AUC).

Best results are:

- 7 metres at 1.1% copper, 0.2% nickel, 0.01% cobalt, 0.19 g/t gold and 0.13 g/t PGE from 120 metres, including 2 metres at 1.8% copper, 0.2% nickel, 0.02% cobalt, 0.25 g/t gold and 0.22 g/t PGE; and - 13 metres at 0.9% copper, 0.3% nickel and 0.02% cobalt from 138 metres, including 2 metres at 1.5% copper, 0.1% nickel, 0.01% cobalt and 0.12 g/t gold, and 5 metres at 1.1% copper, 0.7% nickel, 0.04% cobalt and 0.10 g/t PGE.

The results confirm continuity of mineralisation previously intersected in Ausgold drilling.

Winchester airborne EM (left) and magnetic image showing target areas including Winchester target subject of recent drilling.

Murphy added: “These strong results support our belief that the Yamarna region is a large mineralised province and reaffirms our strategy of consolidating the most prospective intrusions.”

In addition to mineralisation drilled at Winchester, several more airborne EM targets have been identified.

Great Boulder is assessing these targets and designing follow-up drill programs to be implemented once the formal joint venture with Ausgold is executed.

Presenting at CEO Sessions

The managing director will address investors at the CEO Session in Sydney on Monday, November 19 and in Melbourne on Tuesday, November 20.

Register today to find out more

Sydney details, Monday, November 19, 2018

Melbourne details, Tuesday, November 20, 2018

Or call John Phillips on (02) 9280 0700

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Fri, 09 Nov 2018 12:38:00 +1100 https://www.proactiveinvestors.com.au/companies/news/208887/great-boulder-resources-gains-further-evidence-of-eastern-mafic-potential-adds-pges-to-the-mix-208887.html
<![CDATA[News - Great Boulder Resources to outline copper-nickel-cobalt strategy at Proactive CEO Sessions ]]> https://www.proactiveinvestors.com.au/companies/news/208189/great-boulder-resources-to-outline-copper-nickel-cobalt-strategy-at-proactive-ceo-sessions-208189.html Great Boulder Resources Ltd (ASX:GBR) is focused on copper-nickel-cobalt projects in the prolific Yamarna region of WA and its strategy will be outlined at next month’s Proactive CEO Sessions.

Managing director Stefan Murphy will update investors on the company’s progress at its Mt Venn and Eastern Mafic projects from which strong results are being received.

Drilling results from both projects as well as nearby targets are proving encouraging while test work on ore from the Mt Venn project is generating high-value copper, nickel and cobalt products.

Murphy will address investors at the CEO Session in Sydney on Monday 19 November and in Melbourne on Tuesday 20 November.

READ: Great Boulder Resources closes in on higher-grade nickel at Eastern Mafic

Recent drilling has confirmed that Eastern Mafic hosts a more nickel-rich part of the magmatic sulphide system than the Mt Venn deposit.

Exploration is now focusing on the higher-tenor nickel sulphide along the feeder structure and neck of the intrusion.

Mt Venn, which is just 7 kilometres away, only has a single phase of low-tenor nickel, however, appears to be richer in copper and cobalt.

READ: Great Boulder Resources produces high-quality copper-nickel-cobalt products from Mt Venn

The first metallurgical testing of samples from the more advanced Mt Venn project has produced a copper sulphide grading 42% copper that can be blended with copper flotation concentrate to improve overall recovery and concentrate grade.

A high-quality, chemical grade cobalt sulphate at 29% cobalt and more than 99% cobalt sulphate was produced, with Great Boulder declaring the product “suitable for high-value use in the battery market”.

A high-quality nickel sulphide grading 42% nickel was produced, with test work to produce nickel sulphate to start soon.

Regional programs

Regionally, a 1,000-metre reverse circulation drilling program is underway at Tarmoola gold prospect with first results expected in mid-November.

Mt Carlon, 60 kilometres south of Mt Venn, is considered a highly attractive nickel sulphide target because it exhibits a strong magnetic and gravity response over several kilometres.

The company has secured an option over this project from Gold Road Limited (ASX:GOR) and upcoming exploration will assess elevated levels of nickel and copper identified in historical aircore drilling.

An option has also been secured with Ausgold Limited (ASX:AUC) to form a joint venture over the Winchester copper-nickel sulphide project, 40 kilometres north of Mt Venn.

The high nickel tenor of mineralisation makes it particularly attractive as a blend for Mt Venn, as does its potential to host higher grade nickel sulphide.

Register today to find out more.

Sydney details, Monday, November 19, 2018

Melbourne details, Tuesday, November 20, 2018

Or call John Phillips on (02) 9280 0700

The Proactive CEO Sessions feature five presenting companies in total.

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Wed, 31 Oct 2018 16:13:00 +1100 https://www.proactiveinvestors.com.au/companies/news/208189/great-boulder-resources-to-outline-copper-nickel-cobalt-strategy-at-proactive-ceo-sessions-208189.html
<![CDATA[News - Great Boulder Resources produces high-quality copper-nickel-cobalt products from Mt Venn ]]> https://www.proactiveinvestors.com.au/companies/news/207613/great-boulder-resources-produces-high-quality-copper-nickel-cobalt-products-from-mt-venn-207613.html Great Boulder Resources Ltd (ASX:GBR) has shared first metallurgical testing of samples from its Mt Venn project in Western Australia have generated high-value copper, nickel and cobalt products.

The products included a copper sulphide grading 42% copper that can be blended with copper flotation concentrate to improve overall recovery and concentrate grade.

READ: Great Boulder Resources closes in on higher-grade nickel at Eastern Mafic

A high-quality, chemical grade cobalt sulphate at 29% cobalt and more than 99% cobalt sulphate was produced, with Great Boulder declaring the product “suitable for high-value use in the battery market”.

A high-quality nickel sulphide grading 42% nickel was produced, with test work to produce nickel sulphate to start soon.

Great Boulder managing director Stefan Murphy said the copper, nickel and cobalt results were “highly significant” as they showed high-quality products could be generated by applying both conventional and newly-developed processing techniques to Mt Venn ore.

Murphy reported: “These results provide more evidence of the strong development potential at Mt Venn.

“When they are combined with the extensive mineralised systems we have outlined at Mt Venn and the adjacent Eastern Mafic complex, the outlook for this project is very bright.”

READ: Great Boulder Resources makes steady progress across copper, nickel, cobalt exploration portfolio

To produce more definitive product specifications and recoveries, the company plans to:

separate test work on higher grade feed more representative of Mt Venn, and higher nickel tenor feed from the Eastern Mafic and Winchester deposits;

recycle leach solution to improve pregnant leach solution (PLS) grade;

optimise impurity removal, reagent dosage and pH profile to improve selectivity during each stage of metal precipitation/crystallisation; and

investigate which suite of products provides the best recoveries and payabilities to generate the highest revenue for the project.

Besides leach circuit activities, test work will be undertaken on the copper flotation circuit from samples more representative of the Mt Venn and the Eastern mafic deposits.

These samples will include “the more chalcopyrite (copper) dominant domains from Mt Venn and higher nickel tenor mineralisation from the Eastern Mafic”.

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Mon, 22 Oct 2018 20:23:00 +1100 https://www.proactiveinvestors.com.au/companies/news/207613/great-boulder-resources-produces-high-quality-copper-nickel-cobalt-products-from-mt-venn-207613.html
<![CDATA[Media files - Great Boulder Resources' results supporting its hypothesis at the Yamarna Belt ]]> https://www.proactiveinvestors.com.au/companies/stocktube/10872/great-boulder-resources-results-supporting-its-hypothesis-at-the-yamarna-belt-10872.html Wed, 17 Oct 2018 10:00:00 +1100 https://www.proactiveinvestors.com.au/companies/stocktube/10872/great-boulder-resources-results-supporting-its-hypothesis-at-the-yamarna-belt-10872.html <![CDATA[News - Great Boulder Resources closes in on higher-grade nickel at Eastern Mafic ]]> https://www.proactiveinvestors.com.au/companies/news/206941/great-boulder-resources-closes-in-on-higher-grade-nickel-at-eastern-mafic-206941.html Great Boulder Resources Ltd (ASX:GBR) is closer to unlocking the key to nickel mineralisation at the Eastern Mafic project in WA as well as copper and cobalt at nearby Mt Venn after receiving further assay results.

At Eastern Mafic, the company appears to be closing in on the higher-grade zone of nickel mineralisation with three distinct sulphide phases now identified.

This supports Great Boulder’s view that this deposit is closer to the source of high-grade nickel mineralisation.

READ: Great Boulder Resources makes steady progress across copper, nickel, cobalt exploration portfolio

Mt Venn, which is just 7 kilometres away, only has a single phase of low-tenor nickel, however, appears to be more rich in copper and cobalt.

Nickel tenor analysis showing three phases of sulphide mineralisation at Eastern Mafic and single phase at Mt Venn.

“Beginning to deliver clear message”

Great Boulder managing director Stefan Murphy said the results were beginning to deliver a clear message about the nature of the mineralised systems at the Eastern Mafic and Mt Venn.

“There is now a pattern emerging which supports our geological interpretation as to how the sulphide system was formed and where the higher grades and wider mineralisation may be found.

“Once all assays are received we will be able to target the prospective rocks that host the higher tenor nickel and look for the base of these intrusions where massive sulphide typically accumulates.”

Maiden Eastern Mafic drilling

The company has completed a maiden drilling program of 30 reverse circulation (RC) and diamond holes for 6,777 metres at Eastern Mafic.

Assays have been received from the majority of holes, with best results of 33 metres at 0.3% nickel, 0.2% copper and 0.04% cobalt; 5 metres at 0.4% nickel, 0.3% copper and 0.03% cobalt; and 7 metres at 0.3% nickel, 0.2% copper and 0.05% cobalt.

Results are pending for the final eight holes.

Airborne EM over magnetic image at Eastern Mafic.

This program identified a new magmatic sulphide system at the Eastern Mafic that shows a major improvement in nickel grade and tenor when compared to Mt Venn.

READ: Great Boulder Resources adds to strong nickel-copper-cobalt position in Yamarna region

Drilling at Zermatt prospect defined mineralisation over 400 metres of strike, within an upper and lower sulphide lens.

New zone intersected

A new zone of sulphide mineralisation similar to Zermatt was intersected at the Cortina prospect, 500 metres southwest from Zermatt.

Copper-nickel mineralisation was intersected at the southern extension of the feeder zone at Ben Lomond prospect.

Two wide zones of sulphide mineralisation were intersected within the feeder structure at anomaly ML13, between Zermatt and Ben Lomond.

READ: Great Boulder Resources increases landholding in prospective nickel-copper-cobalt territory

Results indicate that high-tenor nickel sulphide found along the feeder zone and neck of the Zermatt intrusion is considered the most prospective for high-grade nickel sulphide mineralisation.

Future focus

Great Boulder will focus ongoing exploration efforts along the 6-kilometre feeder zone and neck of the intrusion, targeting basal accumulations of the higher tenor nickel sulphide.

Massive sulphide typically accumulates at the base of fertile mafic intrusions and higher grades are found where the high tenor nickel sulphide accumulates.

Mt Venn results

At Mt Venn, the latest results continue to extend the known mineralisation which has now been defined over 1-kilometre of strike length.

There were 19 RC and diamond holes drilled for 4,284 metres focused on strike and dip extensions to the central zone, while also testing the northern extension.

Gravity image showing Mt Venn and Eastern Mafic complexes.

Results include:

- 43 metres at 0.4% copper, 0.2% nickel and 0.06% cobalt from 141 metres, including 11 metres at 0.5% copper, 0.3% nickel and 0.09% cobalt, and 5 metres at 0.8% copper, 0.2% nickel and 0.05% cobalt. - 20 metres at 0.6% copper, 0.1% nickel and 0.02% cobalt from 141 metres, including 3 metres at 1.2% copper; and - 14 metres at 0.6% copper, 0.2% nickel and 0.05% cobalt from 236 metres, including 4 metres at 1.0% copper, 0.2% nickel and 0.05% cobalt.

Mineralisation remains open along strike and down-dip.

The northern extension of the system was also discovered during this program, with wide zones of copper dominant sulphide mineralisation intersected.

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Fri, 12 Oct 2018 10:41:00 +1100 https://www.proactiveinvestors.com.au/companies/news/206941/great-boulder-resources-closes-in-on-higher-grade-nickel-at-eastern-mafic-206941.html
<![CDATA[News - Great Boulder Resources makes steady progress across copper, nickel, cobalt exploration portfolio ]]> https://www.proactiveinvestors.com.au/companies/news/206739/great-boulder-resources-makes-steady-progress-across-copper-nickel-cobalt-exploration-portfolio-206739.html Great Boulder Resources Ltd (ASX:GBR) is expecting a steady flow of positive news from its successful copper, nickel and cobalt exploration strategy in the Mt Venn-Yamarna region of Western Australia.

Mt Venn project

The Mt Venn Project is 130 kilometres east of Laverton in the Eastern Goldfields district and consists of six granted exploration licences and one granted prospecting licence.

Great Boulder holds a 75% interest in the Mt Venn Project through a joint venture agreement with Eastern Goldfields Mining Company Pty Ltd (EGMC).

Both Great Boulder and EGMC are contributing to project expenditure on a pro rata basis, equal to their equity interest (75:25).

READ: Great Boulder Resources’ drilling reveals wide zone of copper, nickel and cobalt

Great Boulder has identified extensive copper-nickel-cobalt mineralisation at Mt Venn outlined over several kilometres.

Notably, the multiple lenses of copper-dominant near-surface mineralisation are amenable to open pit mining.

Great Boulder is also expected to benefit from significant new power, water and road infrastructure installed at Mt Venn as part of Gold Road Resources Ltd’s (ASX:GOR) Gruyere gold mine development.

A simplified flowsheet for Mt Venn metallurgical test work

Metallurgical test work at Mt Venn is well advanced to produce copper sulphide concentrate and cobalt-nickel sulphate for the battery market.

Eastern Mafic

Early in 2018, Great Boulder began exploration activities over the Eastern Mafic complex, located seven kilometres south-east from the Mt Venn copper-nickel-cobalt discovery.

Subsequent aircore drilling and electromagnetic surveys established more than 40 anomalies, with likely sulphide sources and associated with anomalous nickel and copper geochemistry.

Drill testing of these anomalies has commenced and the initial results confirm massive sulphide sources and a magmatic base metal system similar to Mt Venn, albeit the nickel content and tenor appears materially higher.

READ: Great Boulder Resources shares up 40% as it hits massive sulphides at Eastern Mafic

It is now clear there are two sulphide phases at both Mt Venn and the Eastern Mafic projects — an initial magmatic sulphide phase with higher nickel tenor and a subsequent host rock sulphide contamination that generates pyrrhotite.

Great Boulder is continuing to develop its understanding of this system in order to locate a nickel-rich primary magmatic sulphide accumulation at the Eastern Mafic and expand the copper-rich Mt Venn system.

READ: Great Boulder Resources adds to strong nickel-copper-cobalt position in Yamarna region

Great Boulder recently added to its nickel-copper position in the Yamarna region with the signing of an option over the Yamarna Nickel Project.

A binding option agreement with Ausgold Ltd (ASX:AUC) will see the companies form a joint venture covering the highly-prospective nickel-copper project.

The project has potential to complement Great Boulder’s neighbouring Mt Venn and Eastern Mafic deposits, strengthening the combined economic prospects.

 

The latest agreement follows Great Boulder securing an option from Gold Road Resources over the Mt Carlon project which is 60 kilometres south of Mt Venn.

READ: Great Boulder Resources increases landholding in prospective nickel-copper-cobalt territory

During financial year 2018, Great Boulder completed further exploration at its Tarmoola and Jundee projects where surface geochemistry, further geological mapping and high-grade surface samples have defined targets for drill testing.

The company continues to review gold and base-metal opportunities, primarily in Western Australia, with a view to acquiring and developing complementary assets.

Great Boulder had successfully raised $2.5 million in May 2018 via a share placement at 27 cents a share.

The company is maintaining a tight capital structure with only 80.1 million ordinary shares on issue, $3.7 million cash as at June 30, 2018 and nil debt.

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Wed, 10 Oct 2018 17:01:00 +1100 https://www.proactiveinvestors.com.au/companies/news/206739/great-boulder-resources-makes-steady-progress-across-copper-nickel-cobalt-exploration-portfolio-206739.html
<![CDATA[News - Great Boulder Resources adds to strong nickel-copper-cobalt position in Yamarna region ]]> https://www.proactiveinvestors.com.au/companies/news/206337/great-boulder-resources-adds-to-strong-nickel-copper-cobalt-position-in-yamarna-region-206337.html Great Boulder Resources Ltd (ASX:GBR) continues to add strength to its nickel-copper position in the Yamarna region of Western Australia with the signing of an option over the Yamarna Nickel Project.

A binding option agreement with Ausgold Ltd (ASX:AUC) will see the companies form a joint venture covering the highly prospective nickel-copper project.

The project has potential to complement Great Boulder’s neighbouring Mt Venn and Eastern Mafic deposits, strengthening the combined economic prospects.

North of Mt Venn

Yamarna is 40 kilometres north of the Mt Venn copper-nickel-cobalt project and covers 300 square kilometres of prospective mafic-ultramafic intrusive complexes.

Great Boulder managing director Stefan Murphy said this project and recent option over the Mt Carlon project had the potential to play an important role in the company’s strategy to establish a substantial copper-nickel-cobalt operation.

“We have established extensive mineralisation across Mt Venn and the Eastern Mafic and while our exploration program is ongoing and still in its early phase, it is clear that this is a large mineralised province.

“Results at the Yamarna Nickel Project show that this area is also mineralised and has the potential to host higher-grade nickel which could blend with that at Mt Venn and the Eastern Mafic.”

The Yamarna project is near Great Boulder’s Mt Venn and Eastern Mafic projects.

Under the proposed JV terms, Great Boulder can earn up to 75% of the project by issuing Ausgold 1.5 million shares and spending $500,000 on exploration over four years.

READ: Great Boulder Resources increases landholding in prospective nickel-copper-cobalt territory

This agreement follows Great Boulder securing an option from Gold Road Resources (ASX:GOR) over the Mt Carlon project, which is 60 kilometres south of Mt Venn.

Ausgold drilling has intersected nickel-copper sulphide mineralisation at the Winchester prospect, which is considered one of the Yamarna project’s primary targets.

Strong previous results

Results from previous Winchester reverse circulation (RC) drilling include:

- 31 metres at 0.58% copper and 0.35% nickel from 29 metres; - 21 metres at 0.63% copper, 0.20% nickel and 0.02% cobalt from 88 metres, including 3 metres at 0.9% copper, 0.5% nickel and 0.03% cobalt from 99 metres, and 3 metres at 1.2% copper, 0.2% nickel and 0.01% cobalt from 105 metres; and - 28 metres at 0.50% copper, 0.21% nickel and 0.02% cobalt from 99 metres, including 10 metres at 0.8% copper, 0.4% nickel and 0.03% cobalt from 99 metres. Attractive as blend for Mt Venn

The high nickel tenor of mineralisation intersected makes it particularly attractive as a blend for Mt Venn, as does its potential to host higher grade nickel sulphide.

Ausgold also identified numerous nickel-copper-cobalt and PGE targets from aircore drilling and EM surveys.

Portion of the Yamarna tenement showing EM targets and drilling campaigns.

Great Boulder will assess these as part of its proposed joint venture earn-in.

READ: Great Boulder Resources confirms nickel-copper-cobalt mineralisation at Eastern Mafic

Following completion of drilling at Eastern Mafic, Great Boulder will mobilise an RC drill rig to Winchester with two or three holes planned.

These will test the DHEM modelled conductor plate and interpreted down-dip extension of the copper-nickel bearing lens at the prospect.

Ausgold’s managing director Matthew Greentree said the farm-in agreement ensured the asset would be advanced by a committed explorer in the region through a well-funded exploration program.

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Thu, 04 Oct 2018 09:50:00 +1000 https://www.proactiveinvestors.com.au/companies/news/206337/great-boulder-resources-adds-to-strong-nickel-copper-cobalt-position-in-yamarna-region-206337.html
<![CDATA[News - Great Boulder Resources increases landholding in prospective nickel-copper-cobalt territory ]]> https://www.proactiveinvestors.com.au/companies/news/205695/great-boulder-resources-increases-landholding-in-prospective-nickel-copper-cobalt-territory-205695.html Great Boulder Resources Ltd (ASX:GBR) has secured an option over a prospective nickel-copper project near its Mt Venn Copper-Nickel-Cobalt Project in Western Australia.

The option covers the Mt Carlon project, which is owned by Gold Road Resources (ASX:GOR) and is 60 kilometres south of Mt Venn, part of the broader Yamarna project.

Mt Carlon exhibits a strong magnetic and gravity response over several kilometres and is considered highly attractive.

READ: Great Boulder Resources begins new drilling campaign at Mt Venn copper-nickel-cobalt asset

This may represent a large mafic intrusion, prospective for nickel-copper-cobalt sulphide mineralisation.

A large ultramafic unit, which has been mapped over 7 kilometres of strike adjacent to the mafic intrusion target, is also considered prospective for nickel sulphide.

The Mt Venn and Mt Carlon projects over a regional magnetic image.

Gold Road has granted Great Boulder an option to acquire 100% of the project at any time up until August 10, 2019.

In granting the option, Great Boulder has agreed to meet all statutory expenditure commitments for the 2019 financial year.

Should Great Boulder elect to exercise its option, Gold Road will receive a 2% net smelter royalty on any minerals extracted.

The agreement also provides for Gold Road to be granted the right to acquire any gold discovery defined for three times the attributable expenditure, subject to a minimum JORC-compliant resource of 50,000 ounces.

READ: Great Boulder Resources confirms nickel-copper-cobalt mineralisation at Eastern Mafic

The potential of Mt Carlon is enhanced by its geological setting.

It is immediately west of the Yamarna shear zone in a similar geological setting to Mt Venn and Great Boulder’s adjacent Eastern Mafic copper-nickel-cobalt discovery.

Geology map of Mt Carlon showing mafic intrusion and ultramafic nickel targets.

The discovery of primary copper-nickel-cobalt mineralisation at Mt Venn and Eastern Mafic indicates that a magmatic sulphide system was active along the margins of this shear zone and that further intrusions may occur.

Elevated levels of nickel and copper have been identified in historical aircore drilling and these will be assessed in upcoming exploration programs.

Future work

Only shallow drilling and soil sampling has been completed at Mt Carlon to date with the bedrock largely untested and no ground or airborne electromagnetic (EM) surveys undertaken.

Great Boulder intends to extend the aircore geochemistry coverage over the interpreted mafic intrusion in coming months and complete an EM survey over prospective targets.

Mt Venn interest increased

The company has also achieved its minimum expenditure condition under the Yamarna Joint Venture Agreement and now holds a 75% legal and beneficial interest in the Mt Venn project.

Owing to the exploration success at Mt Venn, joint venture partner Eastern Goldfields Mining Company Pty Ltd (EGMC) has elected to maintain its interest by contributing 25% of all project expenditure.

Asset review

In light of the expanded land holding and exploration and development strategy in the Yamarna region, Great Boulder has re-evaluated its wider asset portfolio.

This has resulted in the company deciding that the Broadwood and Balagundi gold joint ventures are non-core.

As such the company is withdrawing from the joint ventures rather than incur further exploration and holding costs.

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Wed, 26 Sep 2018 10:20:00 +1000 https://www.proactiveinvestors.com.au/companies/news/205695/great-boulder-resources-increases-landholding-in-prospective-nickel-copper-cobalt-territory-205695.html
<![CDATA[Media files - Great Boulder Resources drilling across Yamarna project whilst advancing metallurgy ]]> https://www.proactiveinvestors.com.au/companies/stocktube/10254/great-boulder-resources-drilling-across-yamarna-project-whilst-advancing-metallurgy-10254.html Wed, 29 Aug 2018 09:01:00 +1000 https://www.proactiveinvestors.com.au/companies/stocktube/10254/great-boulder-resources-drilling-across-yamarna-project-whilst-advancing-metallurgy-10254.html <![CDATA[News - Great Boulder Resources confirms nickel-copper-cobalt mineralisation at Eastern Mafic ]]> https://www.proactiveinvestors.com.au/companies/news/203601/great-boulder-resources-confirms-nickel-copper-cobalt-mineralisation-at-eastern-mafic-203601.html Great Boulder Resources Ltd (ASX:GBR) has received first assay results from drilling at the Eastern Mafic complex in Western Australia which confirm nickel-copper-cobalt mineralisation.

Initial down-hole electromagnetic (DHEM) analysis show that these holes intersected the edge of mineralised conductor plates with follow-up drilling planned to test the more accurate conductors.

READ: Great Boulder Resources shares up 40% as it hits massive sulphides at Eastern Mafic

Drilling at the advanced Mt Venn project continues to intersect wide zones of copper dominant mineralisation, extending the mineralised footprint along the central zone of Mt Venn trend.

At Eastern Mafic, 130 kilometres east of Laverton, 20 reverse circulation (RC) and diamond drill holes have been completed for 4,825 metres and tested 18 of the more than 40 MLEM anomalies.

Mineralisation is extended

Mineralisation has been confirmed over 350 metres strike length at the Zermatt prospect, previously known as anomaly ML12, and remains open in all directions.

Assays from the two Zermatt holes contain several intersections of +plus-0.4% nickel and plus-0.5% copper.

At anomaly ML15, a diamond hole intersected 29 metres of disseminated to semi-massive sulphide mineralisation from 92 metres and a smaller but more massive 1.5-metre interval from 128 metres.

Initial DHEM work at Zermatt and ML15 has modelled several off-hole conductors which first pass drilling either missed or intersected only on the edge.

Follow-up drilling targeting the centre of these conductor plates will be carried out as part of the next phase of drilling, which is scheduled to start in early September.

READ: Great Boulder Resources identifies more strong conductors ahead of drilling

Great Boulder believes the results validate its view that the Eastern Mafic represents an earlier part of the magmatic system and is more prospective for nickel mineralisation.

Several holes within the Eastern Mafic did not intersect sufficient sulphide to explain the highly conductive response seen in the moving loop EM survey.

DHEM work at Eastern Mafic complex, which along with Mt Venn form part of the broader Yamarna project.

The company will in future use DHEM as the primary tool used to locate the massive sulphide sources.

READ: Great Boulder Resources begins new drilling campaign at Mt Venn copper-nickel-cobalt asset

At Mt Venn, drilling continues to intersect strike extensions to mineralisation, with over 600 metres now defined along the central zone main mineralised trend.

In addition, a new zone of wide sulphide mineralisation has been identified, interpreted to be the northern extension of the main mineralised trend.

Twelve RC and three pre-collar holes have been completed for 2,786 metres.

One hole intersected the first significant width of copper-nickel-cobalt mineralisation from 195 metres down-hole in the southern extension.

Another intersected 12 metres at 0.5% copper from 126 metres, extending the southern strike of the central zone a further 65 metres.

Increase in size of Mt Venn

At the northern extension, wide intervals of mineralisation have been intersected over a strike length of 300 metres and this remains open in all directions.

This extension represents a significant increase in the size of Mt Venn.

Drilling at Mt Venn is scheduled to finish in the next two weeks before returning to the Eastern Mafic.

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Mon, 27 Aug 2018 08:57:00 +1000 https://www.proactiveinvestors.com.au/companies/news/203601/great-boulder-resources-confirms-nickel-copper-cobalt-mineralisation-at-eastern-mafic-203601.html
<![CDATA[News - Great Boulder Resources shares up 40% as it hits massive sulphides at Eastern Mafic ]]> https://www.proactiveinvestors.com.au/companies/news/202153/great-boulder-resources-shares-up-40-as-it-hits-massive-sulphides-at-eastern-mafic-202153.html Great Boulder Resources Ltd (ASX:GBR) has intersected extensive sulphide mineralisation in its first holes at the Eastern Mafic complex within the Mt Venn Project in Western Australia.

Importantly, this drilling has confirmed that bedrock sulphides are the source of electromagnetic (EM) conductors at the Eastern Mafic complex.

READ: Great Boulder Resources begins new drilling campaign at Mt Venn copper-nickel-cobalt asset

A total of 15 reverse circulation (RC), diamond and RC pre-collars have been drilled to date, with significant zones of sulphide mineralisation intersected at anomalies ML5, 9, 12, 15, and 16.

Supports theory Eastern Mafic is part of larger system

Mineralisation is pyrrhotite dominant with pyrite, chalcopyrite (copper sulphide) and pentlandite (nickel sulphide).

Pentlandite mineralisation supports Great Boulder’s view that the Eastern Mafic is a more nickel-rich part of the larger Mt Venn system.

Assays of wide zones of massive sulphides pending

Drilling has intersected wide zones of massive sulphide mineralisation within the core of the intrusion and along interpreted feeder structures.

Notably, mineralisation was intersected over five kilometre in strike length, confirming the Eastern Mafic is a substantial magmatic sulphide system.

Drill rigs to move to Mt Venn, then back to Eastern Mafic

Great Boulder will shortly move the diamond and RC drill rigs back to Mt Venn while assays are pending and the downhole EM survey is completed to better define the conductor plates.

Once assay and downhole EM results are received, drilling will resume at the Eastern Mafic complex.

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Fri, 03 Aug 2018 09:59:00 +1000 https://www.proactiveinvestors.com.au/companies/news/202153/great-boulder-resources-shares-up-40-as-it-hits-massive-sulphides-at-eastern-mafic-202153.html
<![CDATA[News - Great Boulder Resources begins new drilling campaign at Mt Venn copper-nickel-cobalt asset ]]> https://www.proactiveinvestors.com.au/companies/news/200420/great-boulder-resources-begins-new-drilling-campaign-at-mt-venn-copper-nickel-cobalt-asset-200420.html Great Boulder Resources Ltd (ASX:GBR) has the drill bit spinning at Mt Venn Copper-Nickel-Cobalt Project in Western Australia and plans initial drilling of the adjacent Eastern Mafic complex later this month.

More than 3,000 metres of reverse circulation (RC) and diamond drilling is planned at Mt Venn.

This will primarily test strike and depth extensions to mineralisation ahead of resource definition drilling.

READ: Great Boulder Resources identifies more strong conductors ahead of drilling

After identifying further strong conductors at Eastern Mafic, an initial 6,500 metres of RC and diamond drilling is planned as part of a maiden drill campaign.

This program will target massive sulphide mineralisation associated with the multiple electromagnetic (EM) conductors.

It will also provide information on the formation of the Eastern Mafic and how it relates to mineralisation at Mt Venn.

 

MLEM identifies conductors

A recently completed ground-based moving loop EM (MLEM) survey at Eastern Mafic identified more than 40 strong conductors.

These included further strike extensions along interpreted feeder structures to the south and northwest.

Most of the conductors show a late-time response consistent with a massive sulphide source.

The main 4 kilometre-long conductor trend is along the eastern margin of a large gravity and magnetic anomaly which defines the Eastern Mafic intrusion complex.

Several new conductors have been identified within this trend and are being modelled.

New bedrock conductors have also been identified on the western margin of the intrusion.

These are interpreted to be in similar structures to those identified along the interpreted feeder structure to the south of the Eastern Mafic.

An MLEM late time image with the modelled conductor plates at Eastern Mafic in solid red.

Evidence of feeder structures

Great Boulder considers this important because it provides evidence of feeder structures trending northwest towards the extensive mineralisation at Mt Venn deposit.

A heritage survey has been completed over the Eastern Mafic, covering all priority EM conductors.

Once the final EM conductor plate modelling is complete and heritage clearance received, Great Boulder will begin its maiden drill program.

A down-hole EM (DHEM) survey at Mt Venn has identified several more very strong conductor plates in excess of 100,000 Seimens.

These DHEM plates extend the strike potential of mineralisation.

READ: Great Boulder Resources to accelerate drilling at Mt Venn Copper-Nickel-Cobalt Project after raising $2.5 million

Great Boulder has been able to accelerate drilling at the Mt Venn project after raising $2.5 million in a recent placement.

Mt Venn is part of the broader Yamarna project within the Eastern Goldfields.

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Tue, 10 Jul 2018 09:28:00 +1000 https://www.proactiveinvestors.com.au/companies/news/200420/great-boulder-resources-begins-new-drilling-campaign-at-mt-venn-copper-nickel-cobalt-asset-200420.html
<![CDATA[News - Great Boulder Resources identifies more strong conductors ahead of drilling ]]> https://www.proactiveinvestors.com.au/companies/news/199272/great-boulder-resources-identifies-more-strong-conductors-ahead-of-drilling-199272.html Great Boulder Resources Ltd’s (ASX:GBR) electromagnetic survey at its Mt Venn copper-nickel-cobalt project in Western Australia has identified more strong conductors within the Eastern Mafic complex, taking the total to more than 30.

Many of these conductors are large and shallow, occurring between 50 metres and 120 metres below surface, modelled down to a depth of 300-350 metres and exhibit a strong response consistent with a massive sulphide source.

READ: Great Boulder Resources identifies 12 new conductors ahead of maiden drill program

Subtle variations in conductor strength, magnetic, gravity and geochemistry results suggest variations in the formation of the intrusion and sulphide mineralogy.

This is evident in the recent 200 metre loop survey that identified a large continuous conductor over 600 metres in length, suggesting many of the discrete conductors may also be connected at depth.

Of particular note is the intersection of the eastern shear zone with the core of the intrusion, where some of the strongest conductor plates have been modelled with coincident copper and nickel geochemistry.

The intersection of a mineralised feeder structure into the neck of the intrusion is considered a primary target for massive nickel sulphide mineralisation.

Planning for the maiden drill program is now well advanced and will be adjusted as further electromagnetic results are received.

Given the large number of conductors already identified, the drill program has been expanded to 6,500-7,000 metres at the Eastern Mafic plus an additional 2,000- 3,000 metres at Mt Venn.

READ: Great Boulder Resources to accelerate drilling at Mt Venn Copper-Nickel-Cobalt Project after raising $2.5 million

Drilling is expected to commence on Mt Venn in the first week of July, expanding the copper-nickel-cobalt mineralisation already identified.

On completion of the expanded electromagnetic survey and Heritage survey, drilling will move to the Eastern Mafic, initially with a reverse circulation drill rig and joined shortly after with a diamond drill rig to test the deeper targets.

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Thu, 21 Jun 2018 12:07:00 +1000 https://www.proactiveinvestors.com.au/companies/news/199272/great-boulder-resources-identifies-more-strong-conductors-ahead-of-drilling-199272.html
<![CDATA[News - Great Boulder Resources identifies 12 new conductors ahead of maiden drill program ]]> https://www.proactiveinvestors.com.au/companies/news/197748/great-boulder-resources-identifies-12-new-conductors-ahead-of-maiden-drill-program-197748.html Great Boulder Resources Ltd (ASX:GBR) has identified 12 new conductor targets in a moving loop electromagnetic survey (MLEM) at the Eastern Mafic complex within its Mt Venn project, Western Australia.

The anomalous responses to the MLEM survey mean these targets could potentially host massive sulphide mineralisation.

The ongoing survey is 70% complete and the new 12 new conductors increases the total number of high-priority conductor targets identified in the survey to 15.

READ: Great Boulder Resources to accelerate drilling at Mt Venn Copper-Nickel-Cobalt Project after raising $2.5 million

Great Boulder’s managing director Stefan Murphy said: “The exploration work completed at the Eastern Mafic strongly supports our view that this area has the potential to be the source of the extensive mineralisation already discovered immediately adjacent at Mt Venn.

“The strong EM response from the latest conductors is also highly promising as they are consistent with a massive sulphide source.

“With the survey now 70% completed and the recent $2.5 million capital raising done, we are on the cusp of drilling these potentially company-making targets.”

Maiden drill program at the Eastern Mafic complex

The MLEM survey is expected to finish in 2-3 weeks, which will enable data analysis ahead of a maiden drill program.

The maiden drill program at the Eastern Mafic complex is expected to commence late June to early July.

New assays from Mt Venn drilling show copper-nickel-cobalt

At the Mt Venn discovery next to the Eastern Mafic complex, new drill assays have revealed more strong intersections of copper, nickel and cobalt mineralisation.

Reverse circulation drill results included 21 metres at 0.6% copper, 0.2% and 0.06% cobalt from 30 metres depth.

Notably, high-grade copper intersections of up to 1.6 metres at 3.6% copper were assayed.

Down-hole EM will now be used to target the next round of drilling in this area.

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Mon, 28 May 2018 08:51:00 +1000 https://www.proactiveinvestors.com.au/companies/news/197748/great-boulder-resources-identifies-12-new-conductors-ahead-of-maiden-drill-program-197748.html
<![CDATA[News - Great Boulder Resources to accelerate drilling at Mt Venn Copper-Nickel-Cobalt Project after raising $2.5 million ]]> https://www.proactiveinvestors.com.au/companies/news/197413/great-boulder-resources-to-accelerate-drilling-at-mt-venn-copper-nickel-cobalt-project-after-raising-25-million-197413.html Great Boulder Resources Ltd (ASX:GBR) will accelerate drilling at Mt Venn Copper-Nickel-Cobalt Project in Western Australia after securing commitments to raise $2.5 million in a placement.

The funds will enable the company to drill the Eastern Mafic complex where numerous large bedrock conductors consistent with massive sulphide mineralisation have been identified.

Extensional drilling will also be fast-tracked at the Mt Venn discovery ahead of resource definition drilling.

READ: Great Boulder Resources closer to finding source of Mt Venn’s copper-nickel-cobalt

The oversubscribed raising was priced at 27 cents per share, equal to the last closing price on May 17, 2018, with about 9.26 million shares to be issued.

Shares are up 11% today to 30 cents.

Pleased with support

Managing director Stefan Murphy said the company was extremely pleased with the level of support received in the placement.

 

 

“Great Boulder is now fully funded to execute its drilling program at Mt Venn and the Eastern Mafic complex.

“Results from the ground moving-loop EM (MLEM) survey have confirmed large bedrock conductors consistent with a massive sulphide source at the Eastern Mafic complex.

“We look forward to receiving results from the remaining MLEM survey shortly so we can plan our maiden reverse circulation (RC) and diamond drill program at the Eastern Mafic.”

Great Boulder discovered copper-nickel-cobalt sulphide mineralisation at Mt Venn in late 2017 and continues to grow the mineralisation footprint.

The Mt Venn project is part of the broader Yamarna project in the Eastern Goldfields.

Drilling at Mt Venn

About 4,000 metres of RC and diamond drilling will be scheduled at Mt Venn.

The drill plan will be finalised after the company receives final assay results from recent drilling and down-hole EM survey, scheduled to be completed in mid-June.

READ: Great Boulder to dig deeper at Eastern Mafic complex of Mt Venn copper-nickel-cobalt project

At Eastern Mafic complex ground MLEM is underway, focused on the priority airborne EM anomalies.

Initial results have identified numerous large bedrock conductors that show an EM response consistent with massive sulphide mineralisation and a strong correlation with anomalies identified in an airborne EM survey.

A 1VD Magnetic image showing elevated copper-nickel-cobalt in red.

More than 30 late-time conductors were identified in the airborne survey over a 4-kilometre by 1.5-kilometre trend.

Maiden Eastern Mafic drilling

Once the MLEM survey and geophysical modelling of conductor plates are complete, placement funds will be used for a maiden RC and diamond drill program of about 5,000 metres.

Great Boulder is also progressing metallurgical test work on a composite sample from Mt Venn.

Cleaner test work on the bulk copper concentrate has commenced and additional leach tests will start shortly.

Following production of a bulk liquor, refining test work to produce copper, nickel and cobalt sulphide and sulphate products will start and is scheduled to be completed in late July.

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Tue, 22 May 2018 12:09:00 +1000 https://www.proactiveinvestors.com.au/companies/news/197413/great-boulder-resources-to-accelerate-drilling-at-mt-venn-copper-nickel-cobalt-project-after-raising-25-million-197413.html
<![CDATA[News - Great Boulder Resources enters trading halt ahead of capital raising ]]> https://www.proactiveinvestors.com.au/companies/news/197237/great-boulder-resources-enters-trading-halt-ahead-of-capital-raising-197237.html Great Boulder Resources Ltd (ASX:GBR) has been granted a trading halt by the ASX today pending the release of information regarding a capital raising.

Shares will remain halted until the earlier of either the release of the relevant information or the commencement of trading on Tuesday, 22 May 2018.

Great Boulder recently completed ground survey work in a bid to find the source of copper-nickel-cobalt mineralisation at the Mt Venn project in Western Australia’s Eastern Goldfields.

A moving loop electromagnetic (MLEM) survey over the Eastern Mafic complex confirmed the presence of numerous large bedrock conductors.

These showed an EM response consistent with massive sulphide mineralisation and confirm the results of a recent airborne EM survey.

READ: Great Boulder Resources closer to finding source of Mt Venn’s copper-nickel-cobalt

The Eastern Mafic complex sits immediately adjacent to the Mt Venn discovery, where mineralisation has been outlined over several kilometres and remains open in all directions.

Great Boulder is also planning a maiden reverse circulation and diamond drilling program.

On completion of the MLEM survey and geophysical modelling of the conductor plates, the company will mobilise a drill rig to the site.

Any capital raised could be used to fund exploration programs at the Mt Venn project.

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Fri, 18 May 2018 09:59:00 +1000 https://www.proactiveinvestors.com.au/companies/news/197237/great-boulder-resources-enters-trading-halt-ahead-of-capital-raising-197237.html
<![CDATA[Media files - Great Boulder proving scale of copper-nickel-cobalt assets at Mt Venn project ]]> https://www.proactiveinvestors.com.au/companies/stocktube/9301/great-boulder-proving-scale-of-copper-nickel-cobalt-assets-at-mt-venn-project-9301.html Wed, 16 May 2018 15:51:00 +1000 https://www.proactiveinvestors.com.au/companies/stocktube/9301/great-boulder-proving-scale-of-copper-nickel-cobalt-assets-at-mt-venn-project-9301.html <![CDATA[News - Great Boulder Resources closer to finding source of Mt Venn’s copper-nickel-cobalt ]]> https://www.proactiveinvestors.com.au/companies/news/196864/great-boulder-resources-closer-to-finding-source-of-mt-venns-copper-nickel-cobalt-196864.html Great Boulder Resources Ltd (ASX:GBR) is a step closer to finding the source of copper-nickel-cobalt mineralisation at the Mt Venn project in Western Australia’s Eastern Goldfields following ground survey work.

A moving loop electro-magnetic (MLEM) survey over the Eastern Mafic complex has confirmed the presence of numerous large bedrock conductors.

These show an EM response consistent with massive sulphide mineralisation and confirm the results of a recent airborne EM survey.

READ: Great Boulder Resources gets ready to find out real potential of Eastern Mafic complex

The Eastern Mafic complex sits immediately adjacent to the Mt Venn discovery, where mineralisation has been outlined over several kilometres and remains open in all directions.

 

 

Managing director Stefan Murphy said each round of exploration provided more strong evidence of the outstanding potential at Mt Venn.

“These results continue to strengthen our belief that the Eastern Mafic complex is the feeder structure and may host the higher-grade source of mineralisation within the larger Mt Venn project.

“The airborne EM survey, MLEM survey and the geochemical results are all lining up perfectly.”

An aerial EM survey being flown over the Eastern Mafic complex.

Ongoing MLEM work is progressing north to test strong airborne anomalies with coincident copper-nickel geochemistry.

It is about 15% completed and is expected to take another two to three weeks to complete.

Drilling program planned

Great Boulder is also planning a maiden reverse circulation and diamond drilling program.

On completion of the MLEM survey and geophysical modelling of the conductor plates, the company will mobilise a drill rig to the site.

It expects to start drill testing the anomalies in the Eastern Mafic complex in six weeks.

READ: Great Boulder to dig deeper at Eastern Mafic complex of Mt Venn copper-nickel-cobalt project

Mineralisation at Mt Venn, which remains open in every direction, is copper-dominant and indicative of late-stage formation within the intrusion.

The Eastern Mafic complex is being targeted because its geochemical signature suggests an earlier stage of formation, meaning it is potentially closer to the source or a feeder structure.

Positive drilling results

Great Boulder has also received positive results from drilling at Mt Venn, which is part of the wider Yamarna project.

This has identified new copper-nickel-cobalt lenses and extended existing mineralisation.

Best result was 44 metres at 0.5% copper, 0.2% nickel and 0.06% cobalt from 153 metres downhole, including 3 metres at 1.0% copper and 2 metres at 1.2% copper.

“In addition to these exceptional results at the Eastern Mafic, we have outlined extensive mineralisation immediately next door at Mt Venn.

“This known mineralisation continues to grow with every drill program and remains open in every direction.

“But we also believe it is the tail-end of the mineralised system and that there is a substantial source nearby.

"The Eastern Mafic continues to demonstrate characteristics consistent with being that source.”

Positive initial test work

The company has also received positive results from initial metallurgical trials on a composite sample from Mt Venn.

This work is testing metallurgical flowsheet options to produce separate copper, nickel and cobalt products.

Preliminary results indicate that extractions of about 90% can be obtained for copper concentrate and a nickel-cobalt concentrate under test conditions.

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Mon, 14 May 2018 10:09:00 +1000 https://www.proactiveinvestors.com.au/companies/news/196864/great-boulder-resources-closer-to-finding-source-of-mt-venns-copper-nickel-cobalt-196864.html
<![CDATA[News - Great Boulder to dig deeper at Eastern Mafic complex of Mt Venn copper-nickel-cobalt project ]]> https://www.proactiveinvestors.com.au/companies/news/196596/great-boulder-to-dig-deeper-at-eastern-mafic-complex-of-mt-venn-copper-nickel-cobalt-project-196596.html Great Boulder Resources Ltd’s (ASX:GBR) share price spiked 20% last week after the company announced that it had identified multiple conductors at Mt Venn.

This is a Western Australian copper-nickel-cobalt project being undertaken by the Yamarna Joint Venture with Great Boulder having the right to earn a 75% interest.

This would require the company to fund $2 million in exploration over a five-year period.

Right address for promising results

The project is in a highly prospective area, only 30 kilometres west of the Gruyere gold deposit in the Eastern Goldfields district of Western Australia.

The Yamarna project hosts the southern section of the Mount Venn Igneous Complex.

This is a layered mafic-ultramafic complex within which historical exploration to the north has returned anomalous values for nickel and copper.

Identification of multiple conductors

The potential discovery of a feeder structure within the Mt Venn project is important as many globally-significant magmatic nickel sulphide ore bodies occur within these structures.

From a geological perspective, this is where nickel-rich magma first mixes with sulphur to produce massive sulphide deposits.

Hence, the identification of multiple conductors over a 6-kilometre strike through an airborne electromagnetic (EM) survey of the Eastern Mafic complex at Mt Venn was well received.

Mineralisation open in every direction

The Eastern Mafic complex sits next to the Mt Venn discovery, where copper, nickel and cobalt mineralisation has been identified over several kilometres of strike.

READ: Great Boulder Resources gets ready to find out real potential of Eastern Mafic complex

Mineralisation at Mt Venn, which remains open in every direction, is copper dominant and indicative of late-stage formation within the intrusion.

Preliminary XRF analysis of aircore drilling over the Eastern Mafic complex has demonstrated anomalous copper and nickel coincident with the airborne EM conductors.

Confirms potential for massive sulphide mineralisation

Great Boulder managing director Stefan Murphy said: “We have identified over 25 discrete, late-time conductors located in a part of the intrusion previously identified as having elevated copper, nickel and cobalt.

“This geochemical anomalism has been confirmed with preliminary XRF field assays, extending the copper-nickel-cobalt footprint to over 4 kilometres in the core of the intrusion and even further along the eastern shear zone.”

 

 

These results support Great Boulder’s view that the Eastern Mafic complex has the potential to host significant massive sulphide mineralisation.

Upcoming surveying

A detailed ground MLEM (moving loop electromagnetic) survey will now commence on the strongest conductors within the Eastern Mafic complex.

MLEM is increasingly being used in areas where there are large tracts of territory to be covered and where there is a particular interest in identifying deeper mineralisation.

Significantly, MLEM was successfully used by Great Boulder to identify conductor plates at Mt Venn which subsequently returned promising zones of sulphide mineralisation.

Identifying deeper mineralisation

A paleochannel that cuts the western side of the Eastern Mafic complex has resulted in a wide paleo ‘valley’ with significantly deeper weathering that could mask bedrock conductors.

A wide spaced 200-metre line by 100-metre station MLEM survey will be completed over this area in order to detect anomalies beneath the conductive cover.

The results from this surveying could be extremely significant in helping to determine the possible size of the resource and shaping the company’s ongoing exploration strategy.

Important news flow from Jundee South

There is also the prospect of near-term positive news in relation to Great Boulder’s Jundee South project, most of which has been subject to limited previous exploration.

Prospectivity of the Jundee South project is further enhanced by Northern Star’s (ASX:NST) ongoing exploration success within its nearby Jundee operations.

The company has made new discoveries at this project and these are being made within the Jundee Dolerite and broader Yandal greenstone belt.

The proximity of the projects can be seen below.

During the March quarter, Great Boulder undertook auger geochemistry to test for gold anomalism associated with the Jundee Dolerite on its tenement.

Final assay results are expected shortly, after which Great Boulder will plan follow-up aircore drilling to test surface gold anomalies detected from first-pass auger sampling.

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Wed, 09 May 2018 10:08:00 +1000 https://www.proactiveinvestors.com.au/companies/news/196596/great-boulder-to-dig-deeper-at-eastern-mafic-complex-of-mt-venn-copper-nickel-cobalt-project-196596.html
<![CDATA[News - Great Boulder Resources gets ready to find out real potential of Eastern Mafic complex ]]> https://www.proactiveinvestors.com.au/companies/news/196000/great-boulder-resources-gets-ready-to-find-out-real-potential-of-eastern-mafic-complex-196000.html Great Boulder Resources Ltd (ASX:GBR) has received electromagnetic (EM) survey results at the Eastern Mafic complex within the Mt Venn copper-nickel-cobalt project in Western Australia.

Significantly, the survey identified multiple high-priority targets conductors at the Eastern Mafic complex, which is nearby to the Mt Venn discovery.

WATCH:  Great Boulder Resources expects significant news flow in coming weeks

Great Boulder’s managing director Stefan Murphy said: “These results reveal an exceptionally large number of strong late-time conductors which show the Eastern Mafic complex has the potential to host significant massive sulphide mineralisation.

“We have now identified over 25 discrete, late-time conductors located in a part of the intrusion previously identified as having elevated copper, nickel and cobalt.

“This geochemical anomalism has been confirmed with preliminary XRF field assays, extending the copper-nickel-cobalt footprint to over 4km in the core of the intrusion and even further along the eastern shear zone.”

Ground survey to begin ahead of RC drilling

A detailed ground moving loop electromagnetic (MLEM) survey will now commence on the strongest conductors within the Eastern Mafic complex.

Great Boulder is also awaiting results from the recently completed 226-hole aircore drilling program over the Eastern Mafi complex.

Notably, preliminary XRF analysis of aircore drilling samples has demonstrated anomalous copper and nickel coincident with the airborne EM conductors.

Aircore assays and MLEM results will be used to plan priority reverse circulation (RC) drill targets.

READ: Great Boulder Resources extending mineralisation with phase III drilling

Mineralisation at Mt Venn, which remains open in every direction, is copper dominant and indicative of late-stage formation within the intrusion.

The Eastern Mafic complex was targeted because its geochemical signature suggested an earlier stage of formation.

This means it is potentially closer to the source of the intrusion and therefore prospective for massive sulphide mineralisation.

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Mon, 30 Apr 2018 09:33:00 +1000 https://www.proactiveinvestors.com.au/companies/news/196000/great-boulder-resources-gets-ready-to-find-out-real-potential-of-eastern-mafic-complex-196000.html
<![CDATA[Media files - Great Boulder Resources expects significant news flow in coming weeks ]]> https://www.proactiveinvestors.com.au/companies/stocktube/9114/great-boulder-resources-expects-significant-news-flow-in-coming-weeks-9114.html Fri, 20 Apr 2018 16:14:00 +1000 https://www.proactiveinvestors.com.au/companies/stocktube/9114/great-boulder-resources-expects-significant-news-flow-in-coming-weeks-9114.html <![CDATA[News - Great Boulder Resources extending mineralisation with phase III drilling ]]> https://www.proactiveinvestors.com.au/companies/news/195421/great-boulder-resources-extending-mineralisation-with-phase-iii-drilling-195421.html Great Boulder Resources Ltd (ASX:GBR) has completed 17 holes in its phase III drill program at its Mt Venn copper-nickel-cobalt discovery within the Yamarna Project in Western Australia.

The in-fill and extensional drilling program consisted of four diamond holes and 13 reverse circulation (RC) holes.

Notably, visual observations indicate that the drilling has extended the known mineralisation both down-dip and along strike.

Initial assays results are expected as early as late April.

READ: Great Boulder Resources steps up exploration at Mt Venn copper-nickel-cobalt discovery

The drilling is part of a multi-pronged exploration campaign at the emerging Mt Venn discovery that also includes airborne electromagnetic (EM) surveys.

Processed data from the airborne EM survey is expected imminently and will be reported once received and interpreted.

A ground-based moving loop EM (MLEM) survey will be designed over priority areas of the Eastern Mafic complex once the AEM data is processed.

Nearby Eastern Mafic complex shows similarities to Mt Venn

During the March quarter, Great Boulder completed an extensive ground-based gravity survey over the Yamarna project.

The gravity survey identified a large intrusive body associated with the Eastern Mafic complex, measuring 4x3 kilometres located only 7 kilometres from Mt Venn.

Exploration data indicates that the Eastern Mafic complex formed during the same magmatic event as Mt Venn.

The Eastern Mafic complex could be the feeder structure

The potential discovery of a feeder structure within the Mt Venn project is significant.

Many globally-significant magmatic nickel sulphide orebodies occur within these structures, where nickel-rich magma first mixes with sulphur to produce massive sulphide deposits.

Great Boulder had $2.8 million in cash at the end of the March quarter.

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Fri, 20 Apr 2018 11:33:00 +1000 https://www.proactiveinvestors.com.au/companies/news/195421/great-boulder-resources-extending-mineralisation-with-phase-iii-drilling-195421.html
<![CDATA[News - Great Boulder Resources steps up exploration at Mt Venn copper-nickel-cobalt discovery ]]> https://www.proactiveinvestors.com.au/companies/news/193914/great-boulder-resources-steps-up-exploration-at-mt-venn-copper-nickel-cobalt-discovery-193914.html Great Boulder Resources Ltd (ASX:GBR) is undertaking a multi-pronged exploration campaign aimed at establishing the full extent of its Mt Venn copper-nickel-cobalt discovery in Western Australia.

The campaign comprises diamond, reverse circulation (RC) and aircore drilling along with an airborne electromagnetic (EM) survey.

Metallurgical test work is also progressing on core samples from diamond drilling at the project in the Eastern Goldfields.

READ: Great Boulder Resources reveals very large intrusive with gravity survey

Managing director Stefan Murphy said exploration at Mt Venn was now entering the phase where it could generate substantial value for shareholders.

“We have a confirmed discovery,” he said, “and are pushing ahead with defining how large the system is given the significant amount of mineralisation delineated, which remains open in every direction.”

Shares are up more than 6% to 34 cents in early trade.

Two diamond tails and one diamond hole from the surface have been completed in the Central zone of the Mt Venn complex.

Visual logs of these holes have extended mineralisation down dip, with assay results expected in late April.

Second diamond hole underway

A second and final diamond hole from surface is underway.

Following completion of the diamond drilling, an RC program of about 2,000 metres will be carried out.

This will test extensions to the Mt Venn mineralised trend within the Central zone and along strike to the north and south.

READ: Great Boulder Resources’ drilling reveals wide zone of copper, nickel and cobalt

Great Boulder has started a 500-metre aircore drilling program at the Eastern Mafic complex designed primarily to gather bedrock geochemical information.

This will enable the company to develop a geological model of the intrusions which make up the complex.

Airborne survey planned

Planning for an airborne EM survey over the Eastern Mafic complex is well advanced.

A contract has been signed and work is scheduled to start after Easter.

This is expected to take up to two weeks to complete.

Mt Venn forms part of the broader Yamarna project.

Murphy said: “Identification of the Eastern Mafic complex is a breakthrough as it has potential to host high-grade nickel and cobalt mineralisation associated with a feeder structure into the larger intrusive complex.

“Exploration is aimed at both growing the existing mineralisation footprint at Mt Venn and identifying the most prospective intrusions of the Eastern Mafic complex for nickel-copper-cobalt mineralisation.”

Sulphide mineralisation readily floats

Preliminary test work on diamond core samples shows that the sulphide mineralisation readily floats.

Much of the recent work has focused on grind size and reagent use to maximise separation of the copper and nickel-cobalt concentrate.

A bulk flotation test will be carried out next week with the intention of producing 15-20 kilograms of nickel-cobalt concentrate to begin leach test work.

It also aims to produce sufficient copper concentrate to optimise the cleaning stage ahead of producing a final copper product.

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Wed, 28 Mar 2018 09:30:00 +1100 https://www.proactiveinvestors.com.au/companies/news/193914/great-boulder-resources-steps-up-exploration-at-mt-venn-copper-nickel-cobalt-discovery-193914.html
<![CDATA[News - Great Boulder Resources reveals very large intrusive with gravity survey ]]> https://www.proactiveinvestors.com.au/companies/news/193111/great-boulder-resources-reveals-very-large-intrusive-with-gravity-survey-193111.html Great Boulder Resources Ltd (ASX:GBR) has revealed a very large intrusive body through a gravity survey at its Mt Venn copper-nickel-cobalt project in Western Australia.

Significantly, the 4x3 kilometre intrusive body identified is coincident with surface copper-nickel-cobalt anomalism.

Stefan Murphy, managing director, said: “These results have opened up immense new potential at Mt Venn and could prove to be a game-changer at every level.”

READ: Great Boulder Resources’ drilling reveals wide zone of copper, nickel and cobalt

The gravity survey was initiated following positive exploration results from Mt Venn where extensive copper-nickel-cobalt sulphide mineralisation has been delineated over several kilometres.

Due to the highly encouraging results, exploration will now be fast-tracked over this area, commencing with an extensive aircore program and airborne electromagnetic survey.

Associated with the Eastern Mafic complex

The intrusive body is associated with the Eastern Mafic intrusion located 7 kilometres from the Mt Venn complex.

Previous exploration on the Eastern Mafic complex was limited to shallow rotary airblast drilling for gold with no analysis for base metals or bedrock geochemistry.

Murphy also said: “From limited sampling completed over the Eastern Mafic complex, we can see distinct mafic units with evidence of nickel-copper depletion and a separate suite of mafic rocks with elevated nickel-copper-cobalt and magnesium oxide.

“This geochemistry provides evidence the Eastern Mafic complex is part of the broader Mt Venn complex, but located in a different setting.

“The results of the gravity survey have shown we are in a much larger system than previously thought, with the Eastern Mafic complex potentially representing an earlier-stage conduit or feeder structure that is prospective for nickel sulphide mineralisation.”

Aircore drilling to start as soon as possible

Given the exploration potential, an extensive aircore drilling program will start as soon as possible.

Planning is also underway for an airborne EM survey of the Eastern Mafic complex.

Diamond drilling and metallurgy also to commence

In addition to the new work programs, diamond drilling will shortly commence at Mt Venn.

Metallurgical test work is also underway with the first flotation tests to produce a copper concentrate.

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Wed, 14 Mar 2018 09:28:00 +1100 https://www.proactiveinvestors.com.au/companies/news/193111/great-boulder-resources-reveals-very-large-intrusive-with-gravity-survey-193111.html
<![CDATA[News - Great Boulder Resources exploring new targets identified in prolific Jundee region ]]> https://www.proactiveinvestors.com.au/companies/news/192305/great-boulder-resources-exploring-new-targets-identified-in-prolific-jundee-region-192305.html Great Boulder Resources Ltd (ASX:GBR) has commenced exploration at its Jundee South project.

This is situated immediately adjacent to Northern Star Resources’ (ASX:NST) Jundee gold mine in Western Australia.

Field mapping, re-processing of geophysical data and evaluation of previous drilling has generated a new geological model.

Great Boulder has also had recent drilling success at its Mt Venn copper, nickel and cobalt.

READ: Great Boulder Resources’ drilling reveals wide zone of copper, nickel and cobalt Northern Star’s success rubs off

The prospectivity of the Jundee South project is further enhanced by Northern Star’s ongoing exploration success within its Jundee operations.

The company has made new discoveries within the Jundee Dolerite and broader Yandal greenstone belt.

Northern Star’s exploration success has further strengthened Great Boulder’s confidence in the prospectivity of Jundee South.

Stefan Murphy, managing director, said “The outstanding exploration results from Northern Star have demonstrated that despite its world-class history, the best may be still to come in the Jundee Goldfield.

“Our Jundee South project is ideally located between Northern Star’s Jundee underground gold mine located 10 kilometres to the north, and its recent Ramone discovery, 20 kilometres to the south."

Model identifies new targets

Revised modelling has identified several new gold targets within the project which are located along structural and lithological contacts within the Jundee Dolerite.

This has yielded more than 3 million ounces of gold at 10 g/t gold from the total 10 million ounce Jundee gold mine endowment.

Great Boulder is now undertaking a close-spaced, near surface exploration program to test for gold anomalism associated with the Jundee Dolerite on its tenement. 

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Wed, 28 Feb 2018 10:45:00 +1100 https://www.proactiveinvestors.com.au/companies/news/192305/great-boulder-resources-exploring-new-targets-identified-in-prolific-jundee-region-192305.html
<![CDATA[News - Great Boulder Resources’ drilling reveals wide zone of copper, nickel and cobalt ]]> https://www.proactiveinvestors.com.au/companies/news/191602/great-boulder-resources-drilling-reveals-wide-zone-of-copper-nickel-and-cobalt-191602.html Great Boulder Resources Ltd’s (ASX:GBR) drilling at its Mt Venn Project in Western Australia has returned shallow, wide intersection of copper, nickel and cobalt.

READ: Great Boulder Resources confirms copper-nickel-cobalt discovery and will expedite development

Significantly, the company intersected 52 metres of mineralisation in four lenses between 12.3 metres and 87.7 metres downhole.

Test work to assess Mt Venn’s economic potential commencing

Metallurgical test work will now commence to define the flowsheet that can maximise the value of various product streams available from the project.

The first phase of test work will focus on the "front end” of the process (grinding, flotation and leaching) aiming to generate a clean copper concentrate.

The second phase will have a greater focus on defining the “back end” of the process to produce various nickel and cobalt products.

Multi-pronged exploration strategy to continue

In parallel with the metallurgical test work, Great Boulder has resumed exploration at Mt Venn.

Exploration will take a two-pronged approach, targeting extensions to known mineralisation while also developing additional “greenfield” targets within the Yamarna-Mt Venn project.

Infill and extensional drilling will commence this weekend following completion of a downhole electromagnetic (DHEM) survey that is currently underway.

The results will be used to update the DHEM conductor plates and finalise reverse circulation drilling plans for the upcoming program.

Large amount of mineralisation identified in a small area

Stefan Murphy, managing director, said: “The metallurgical test work will provide a valuable insight into both the technical and economic outlook for Mt Venn

“In parallel with these tests, we will continue our multi-pronged exploration strategy to continue growing the size of what is already a significant discovery.

“After a very short period of exploration at Mt Venn we have delineated a large amount of mineralisation in only a very small area.”

Gravity survey over the larger Mt Venn and Eastern Mafic complexes

Ground gravity survey over the Mt Venn and Eastern Mafic complexes will also commence this week and is expected to take three weeks to complete.

Circa 70% of Great Boulder’s Yamarna project will be covered by the survey, with the results used in conjunction with magnetic data to generate a 3D inversion model.

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Wed, 14 Feb 2018 12:17:00 +1100 https://www.proactiveinvestors.com.au/companies/news/191602/great-boulder-resources-drilling-reveals-wide-zone-of-copper-nickel-and-cobalt-191602.html
<![CDATA[News - Great Boulder Resources confirms copper-nickel-cobalt discovery and will expedite development ]]> https://www.proactiveinvestors.com.au/companies/news/191107/great-boulder-resources-confirms-copper-nickel-cobalt-discovery-and-will-expedite-development-191107.html Great Boulder Resources Ltd (ASX:GBR) is accelerating its development strategy after confirming that its Mt Venn project in Western Australia is a major copper-nickel-cobalt discovery.

The company has received strong assay results from drilling completed late last year.

It now intends to bring forward infill drilling and metallurgical test work to begin in the next two weeks.

Results confirm extensive mineralisation within the Central zone at Mt Venn and confirm the presence of multiple, steeply dipping lenses over a 500 metre x 200 metre area.

This increases the contained metal per vertical metre and development potential of the Central zone.

READ: Great Boulder Resources extends mineralisation at copper-nickel-cobalt project

Stefan Murphy, managing director, said: “It is only four months since we drilled our first hole at Mt Venn and it is already clear that we have a project of substantial size and potential.

“The significant widths and combined grades contained in these assays, the extensive area over which we have delineated mineralisation and the fact it remains open gives us every reason to be extremely confident about the future of Mt Venn.

“The outlook is particularly favourable in light of the cobalt and high-grade copper we are seeing and the huge scope to grow the known mineralisation.

Accelerating infill drilling

“In light of these positive results, we are accelerating the infill drilling program.

“The drilling will focus on the Central zone where the majority of mineralisation has been defined, with the aim of establishing a maiden resource as soon as possible.

“We will shortly commence metallurgical test work, assessing conventional sulphide flotation for a copper concentrate and an additional leach process for the pyrrhotite to ultimately produce a cobalt and nickel sulphate product for the fast-growing battery market.”

Drilling results include 33 metres at 0.5% copper, 0.1% nickel and 0.05% cobalt from 76 metres; 22 metres at 0.5% copper, 0.2% nickel and 0.05% cobalt from 129 metres; and 8 metres at 0.3% copper, 0.43% nickel and 0.09% cobalt from 25 metres.

Program aimed at defining lenses

Great Boulder will start a 2,500 metre drilling program in two weeks with the aim of better defining the multiple mineralised lenses.

Given the combined strong results, metallurgical test work will begin next week along with a Downhole EM survey on all available holes from the recent drilling.

Results will be used to define extensional targets at the margin of the Central zone and further along the western magnetic trend north and south of the Central zone.

Gravity survey also planned

A gravity survey is scheduled to commence in the next two weeks, covering the Mt Venn intrusion and the Eastern Mafic complex.

The survey will provide better definition of the size and geometry and also help identify different intrusions within each complex.

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Mon, 05 Feb 2018 10:55:00 +1100 https://www.proactiveinvestors.com.au/companies/news/191107/great-boulder-resources-confirms-copper-nickel-cobalt-discovery-and-will-expedite-development-191107.html
<![CDATA[News - Great Boulder Resources extends mineralisation at copper-nickel-cobalt project ]]> https://www.proactiveinvestors.com.au/companies/news/189137/great-boulder-resources-extends-mineralisation-at-copper-nickel-cobalt-project-189137.html Great Boulder Resources Ltd (ASX:GBR) drilling has extended mineralisation and identified a new zone at Mt Venn Copper-Nickel-Cobalt Project in Western Australia.

The central zone extends by a further 150 metres to more than 500 metres while the new zone is parallel and to the east.

It is the third zone in the area as Great Boulder previously identified a parallel zone to the west.

Mineralisation open in all directions

Having three parallel zones enhances the overall metal endowment per vertical metre at Mt Venn, boosting the project’s economic potential.

There is further opportunity to increase value with mineralisation open in all directions.

READ: Great Boulder Resources drills out more sulphide mineralisation at Mt Venn copper-nickel-cobalt project

The company has completed 12 reverse circulation holes for 2,120 metres focused on strike and dip extensions to the central mineralised zone.

It also tested downhole targets along the broader Mt Venn trend.

Core samples have been sent to Perth for analysis with results expected by the third week of January.

The company’s 2017 program has established Mt Venn as a large copper-nickel-cobalt discovery.

2018 exploration plans

Great Boulder plans further drilling in the first quarter of 2018 which will also target the western Mt Venn trend.

Drilling will be undertaken along the entire 4.5 kilometre western magnetic trend.

In the central zone new drilling will focus on up and down dip extensions of known mineralisation and will test strike continuity of the different mineralised zones.

The company will also start a gravity survey over the Mt Venn intrusion early in the new year.

Surface geochemistry and geological mapping will be undertaken in conjunction with the survey to identify intrusions considered more prospective for nickel sulphide mineralisation.

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Thu, 21 Dec 2017 16:36:00 +1100 https://www.proactiveinvestors.com.au/companies/news/189137/great-boulder-resources-extends-mineralisation-at-copper-nickel-cobalt-project-189137.html
<![CDATA[News - Great Boulder Resources drills out more sulphide mineralisation at Mt Venn copper-nickel-cobalt project ]]> https://www.proactiveinvestors.com.au/companies/news/188758/great-boulder-resources-drills-out-more-sulphide-mineralisation-at-mt-venn-copper-nickel-cobalt-project-188758.html Great Boulder Resources Ltd (ASX:GBR) has delivered more positive diamond drilling results from its Mt Venn copper-nickel-cobalt project in Western Australia.

The preliminary visible results are further evidence that the company’s Mt Venn project is a large copper-nickel-cobalt discovery.

A further two diamond drill holes completed at Mt Venn have intersected wide zones of near-surface sulphide mineralisation in separate, parallel mineralised lenses.

Results build on previous success at Mt Venn

These promising drilling results come on the back of success in early December when the company defined copper, nickel and cobalt over a 2.5-kilometre strike length at the project.

READ: Great Boulder Resources defines copper, nickel and cobalt over 2.5 kilometres at Mt Venn

One of the recent diamond drill holes has intersected massive, semi-massive and stringer pyrrhotite with common chalcopyrite only 16 metres downhole.

Several mineralised lenses were intersected over a combined width of 70 metres between 16 metres and 119 metres downhole.

Another hole which was designed to test a strong off-hole conductor identified in the downhole survey intersected significant semi-massive and stringer sulphide mineralisation over a wide 77-metre zone from 66 metres downhole.

Recent results confirm likelihood of higher grade copper mineralisation

Visual logs indicate mineralisation is pyrrhotite dominant with a relatively high chalcopyrite content, consistent with the higher copper grades recently delineated.

The final diamond drill hole is currently underway, testing the southern electromagnetic and magnetic anomaly.

Reverse circulation drilling is almost complete, with two holes remaining to be drilled.

All drilling samples and core will be transported to Perth for preparation and analysis at the conclusion of the drill programs.

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Thu, 14 Dec 2017 08:58:00 +1100 https://www.proactiveinvestors.com.au/companies/news/188758/great-boulder-resources-drills-out-more-sulphide-mineralisation-at-mt-venn-copper-nickel-cobalt-project-188758.html
<![CDATA[News - Great Boulder Resources defines copper, nickel and cobalt over 2.5 kilometres at Mt Venn ]]> https://www.proactiveinvestors.com.au/companies/news/188225/great-boulder-resources-defines-copper-nickel-and-cobalt-over-25-kilometres-at-mt-venn-188225.html Great Boulder Resources Ltd (ASX:GBR) has defined copper, nickel and cobalt over a 2.5 kilometre strike length at its Mt Venn project in Western Australia.

Visible mineralisation has been returned from the first three diamond holes drilled at the property east of Laverton.

With mineralisation open in all directions, numerous conductors remain to be drill-tested over a further 6.5 kilometres.

All drill results indicate that the Mt Venn mineralised system is large.

Three more diamond holes

Three more diamond holes will be drilled as part of the initial program.

One of these will be a wider diameter hole for metallurgical test work.

READ: Great Boulder Resources intersects more copper, nickel and cobalt at Mt Venn

The company has also resumed reverse circulation (RC) drilling.

This will test for extensions to mineralisation identified in the phase I RC program as well as new magnetic conductors.

The new western magnetic zone will also be targeted.

Drilling more effectively targeted

Stefan Murphy, managing director, said: “We are still in the very early stages of this discovery but can more effectively target our drilling.

“This is based on what we now understand about the mineralised system and using electromagnetic and magnetic inversion modelling as an effective exploration tool.

READ: Great Boulder Resources’ shares surge after drilling broad zones of copper

“We now see the copper and nickel-cobalt rich phases occur together in the drill core, which is helping us understand more about the higher grade copper distribution.

“The combined RC and diamond drilling program will test the entire 9-kilometre Mt Venn intrusion, generating a significant amount of information over the coming weeks.”

Mt Venn background

In late 2015 Gold Road (ASX:GOR) drilled and assayed an RC drill hole on the edge of an electromagnetic anomaly, identifying copper-nickel-cobalt mineralisation at the Mt Venn prospect.

Great Boulder subsequently re-assayed the hole and confirmed primary bedrock sulphide mineralisation, with peak assay results of 1.7% copper, 0.2% nickel and 528 ppm cobalt.

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Tue, 05 Dec 2017 09:37:00 +1100 https://www.proactiveinvestors.com.au/companies/news/188225/great-boulder-resources-defines-copper-nickel-and-cobalt-over-25-kilometres-at-mt-venn-188225.html
<![CDATA[News - Great Boulder Resources intersects more copper, nickel and cobalt at Mt Venn ]]> https://www.proactiveinvestors.com.au/companies/news/187791/great-boulder-resources-intersects-more-copper-nickel-and-cobalt-at-mt-venn-187791.html Great Boulder Resources Ltd (ASX:GBR) has drilled further wide intersections of copper, nickel and cobalt from the maiden drilling program at its Mt Venn project in Western Australia.

The latest results provide further evidence Mt Venn is emerging as a significant discovery where numerous targets are yet to be drill-tested along the prospective 9 kilometres of strike length.

Stefan Murphy, managing director, said: “The results received so far are outstanding, particularly given that this was a first-pass reconnaissance drilling program.

“Despite the limited number of holes drilled to date, we have already outlined a substantial discovery of copper, cobalt and nickel over very wide intervals and extensive strike length.

“Importantly, the mineralisation remains open in all directions and we have several highly promising targets yet to be drilled.”

Significant drilling assays from the second batch

Great Boulder has received significant assays from the second batch of the maiden drilling program, including an intersection of 80 metres from 24 metres downhole, containing several wide zones of mineralisation:

- 15 metres at 0.54% copper, 0.16% nickel and 0.05% cobalt from 24 metres downhole, including 3 metres at 1.0% copper, 0.12% nickel and 0.04% cobalt from 24 metres;
- 16 metres at 0.59% copper, 0.13% nickel and 0.04% cobalt from 62 metres downhole, including 3 metres at 0.85% copper, 0.13% nickel and 0.04% cobalt from 63 metres; and
-10 metres at 0.78% copper, 0.18% nickel and 0.06% cobalt from 90 metres downhole, including 3 metres at 1.0% copper, 0.16% nickel and 0.05% cobalt from 90 metres;

The results extend the known mineralisation in the central zone, which hosted the initial strong assay results.

A down-hole electromagnetic survey has now been completed on all accessible holes with initial results received over the central zone.

The updated electromagnetic plates show a series of steeply dipping, stacked conductors in the mineralised zone with additional off-hole conductors that will now be tested.

Several high-priority targets yet to be drilled

A diamond drill rig has commenced the first of five planned holes.

The diamond drilling will initially focus on completing existing holes that were abandoned along the larger 9 kilometres trend and then drill extensions of the main mineralised trend.

A reverse circulation drill rig is expected back on site early next week and will operate until the Christmas break.

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Mon, 27 Nov 2017 11:27:00 +1100 https://www.proactiveinvestors.com.au/companies/news/187791/great-boulder-resources-intersects-more-copper-nickel-and-cobalt-at-mt-venn-187791.html
<![CDATA[News - Great Boulder Resources’ shares surge after drilling broad zones of copper ]]> https://www.proactiveinvestors.com.au/companies/news/187117/great-boulder-resources-shares-surge-after-drilling-broad-zones-of-copper-187117.html Great Boulder Resources Ltd (ASX:GBR) has intersected broad zones of shallow copper-nickel-cobalt mineralisation within its Yamarna Project located east of Laverton in Western Australia.

The initial reverse circulation (RC) drilling assays of up to 4.3% copper and 0.1% cobalt has confirmed a significant mineralised system over an extensive strike length at the Mt Venn prospect.

Great Boulder’s shares were trading circa 70% higher intra-day, at $0.39.

Stefan Murphy, managing director, commented: “To achieve such intersections of cobalt, copper and nickel from the first nine holes is simply outstanding.

“Given that we are conducting scout drilling over a strike length of 7.5 kilometres, it is remarkable to have intersected such widths and grades from these initial holes.

“The potential at Mt Venn is becoming very apparent, with knowledge gained from recent drilling and an improved understanding of the ore-forming systems further confirming the prospectivity of the project.”

Mt Venn background

In late 2015 Gold Road (ASX:GOR) drilled and assayed an RC drill hole on the edge of an electromagnetic anomaly, identifying copper-nickel-cobalt mineralisation at the Mt Venn prospect.

Great Boulder subsequently re-assayed the hole and confirmed primary bedrock sulphide mineralisation, with peak assay results of 1.7% copper, 0.2% nickel and 528 ppm cobalt.

Wide zone of near-surface mineralisation

The maiden reverse circulation drilling program is now complete with a total of 20 holes drilled.

Results from the first nine holes reveal the presence of a wide zone of primary, near-surface copper-nickel-cobalt sulphide mineralisation which remains open in all directions.

Mineralisation is copper-dominant with discrete nickel-cobalt-rich zones.

The highlight results include 18 metres at 0.82% copper, 0.07% nickel and 0.02% cobalt from 187 metres including 1 metre at 4.34% copper from 191 metres.

Importantly, the grades up to 0.3% nickel and 0.1% cobalt within the massive sulphide zones are much higher than anticipated based on previous Gold Road drilling and Great Boulder aircore geochem.

Further drilling planned

A downhole electromagnetic (EM) survey has now commenced with the objective of identifying offhole conductors along the main mineralised trend.

This information will be used with the drill hole data to better constrain the EM plate modelling.

Great Boulder is also building a magnetic inversion model to generate a 3D model of the interpreted sulphide zone.

The results from the inversion model and updated EM plate modelling will be used for planning the next phase of drilling in December.

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Mon, 13 Nov 2017 11:32:00 +1100 https://www.proactiveinvestors.com.au/companies/news/187117/great-boulder-resources-shares-surge-after-drilling-broad-zones-of-copper-187117.html
<![CDATA[News - Great Boulder Resources shares have more than doubled ]]> https://www.proactiveinvestors.com.au/companies/news/186461/great-boulder-resources-shares-have-more-than-doubled-186461.html Great Boulder Resources (ASX:GBR) shares continue their positive momentum trading up 8% on the day and up 125% over the past three months.

The successful September quarter featured significant exploration results from two Western Australian projects.

At the Mt Venn Copper-Nickel-Cobalt prospect within the Yamarna Project, maiden drilling produced initial assays of up to 1.7% copper plus nickel and cobalt.

Drilling is now following-up these results and the more than 30 conductors identified in the electromagnetic (EM) survey.

Early drilling has intersected sulphide zones up to 40 metres wide and first assays are expected in two weeks.

READ NOW: Great Boulder Resources’ shares surge after drilling wide sulphide zones at Mt Venn

At the Tarmoola Gold Project, surface sampling and mapping undertaken over the eastern tenements returns results grading up to 24 g/t gold.

A 2-kilometre long trend of high-grade gold mineralisation was identified along the Marionette shear zone.

An extensive soil sampling program covering the Ursus and Marionette structures is now underway.

READ NOW: Great Boulder Resources picks up high-grade gold in region of multi-million ounce mines ]]>
Tue, 31 Oct 2017 16:10:00 +1100 https://www.proactiveinvestors.com.au/companies/news/186461/great-boulder-resources-shares-have-more-than-doubled-186461.html
<![CDATA[News - Great Boulder Resources’ shares surge after drilling wide sulphide zones at Mt Venn ]]> https://www.proactiveinvestors.com.au/companies/news/186064/great-boulder-resources-shares-surge-after-drilling-wide-sulphide-zones-at-mt-venn-186064.html Great Boulder Resources Ltd (ASX:GBR) has intersected visible sulphide mineralisation at the Mt Venn copper-nickel-cobalt prospect within its Yamarna Project east of Laverton in Western Australia.

The company’s shares were trading circa 24% higher intra-day, at $0.235.

Great Boulder has drilled a total of nine reverse circulation holes at Mt Venn to-date.

The initial focus has been the northern electromagnetic conductor trend, where seven holes have been drilled.

Presence of visible chalcopyrite

Six of the seven holes drilled into the modelled electromagnetic plates have intersected sulphide mineralisation over varying widths up to 40 metres.

Sulphide mineralisation is prominent along the entire conductor trend, showing a highly sulphur-saturated system.

The visually-logged sulphide mineralogy is pyrrhotite dominant with chalcopyrite (copper-sulphide mineral).

This is consistent with the previously-reported hole drilled at Mt Venn by Gold Road (ASX:GOR), which intersected 1.7% copper plus nickel and cobalt.

It is also considered promising that no carbonaceous sediments or graphitic units have been encountered in the drilling.

Drilling program extended

All holes are being cased for downhole electromagnetic survey which will be used with the assay data to improve the modelling.

Given the extensive sulphide mineralisation encountered to-date, the program has been extended from a total of 18 holes to as many as 23 holes.

The additional holes have been planned to test the strike and dip extent of the mineralisation.

Based on current drilling rates, the program is expected to be completed in a fortnight from now.

Planning for Phase 2 drilling (including diamond drilling) will commence once final assay results are returned in mid-November.

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Tue, 24 Oct 2017 11:26:00 +1100 https://www.proactiveinvestors.com.au/companies/news/186064/great-boulder-resources-shares-surge-after-drilling-wide-sulphide-zones-at-mt-venn-186064.html
<![CDATA[News - Great Boulder Resources starts drilling copper, nickel, cobalt targets at Mt Venn ]]> https://www.proactiveinvestors.com.au/companies/news/185464/great-boulder-resources-starts-drilling-copper-nickel-cobalt-targets-at-mt-venn-185464.html Great Boulder Resources Ltd (ASX:GBR) has crossed a milestone after commencing drilling at the Mt Venn copper-nickel-cobalt prospect within its Yamarna Project east of Laverton in Western Australia.

A total of 18 holes are planned to test 18 of the 32 electromagnetic (EM) conductor plates as part of the first phase reverse circulation (RC) drilling program. 

Great Boulder’s share price has increased 60% over the past three months, last trading at $0.20.

Mt Venn background

Great Boulder’s Yamarna Project hosts the Mt Venn igneous complex, where recent drilling established the presence of a mineralised magmatic sulphide system.

In late 2015 Gold Road (ASX:GOR) drilled and assayed an RC drill hole on the edge of an electromagnetic anomaly identified from an airborne XTEM survey, identifying copper-nickel-cobalt mineralisation.

Great Boulder subsequently re-assayed the hole and confirmed primary bedrock sulphide mineralisation, with peak assay results of 1.7% copper, 0.2% nickel and 528 ppm cobalt.

Focus

The drilling will focus on a 5 kilometre-long northern trend, where the strongest and most shallow conductors were detected with coincident copper-nickel anomalies.

Eight drill holes have been planned to test this priority area.

The copper-nickel geochemical trend extends north beyond the limit of the EM survey.

In this area, strong silver-zinc-lead results were also returned and it appears to represent a different style of mineralisation to the main magmatic copper-nickel target.

Five holes have been planned to test this northern extension and down-hole EM will be undertaken to identify and orientate any conductors associated with sulphide mineralisation. 

The western target area sits off the main Mt Venn trend and exhibits a different geochemical signature, with higher background nickel and chromium levels which suggest a more ultramafic lithology.

The conductor plates are deeper than those on the main northern trend and two RC drill holes have been planned for this target.

Next steps

The RC drill rig has arrived on site and collared the first of the planned 18 drill holes.

It is anticipated that the drill program will take three weeks to complete with assay results available two weeks later.

Each RC drill hole will also be cased and prepared for down-hole EM surveying which will then be used to better constrain and orientate the conductors for subsequent phases of RC and diamond drilling.

The drill hole planning is designed to intersect the middle and upper portions of the conductor plates where the EM response is strongest.

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Thu, 12 Oct 2017 11:31:00 +1100 https://www.proactiveinvestors.com.au/companies/news/185464/great-boulder-resources-starts-drilling-copper-nickel-cobalt-targets-at-mt-venn-185464.html
<![CDATA[News - Great Boulder Resources to drill copper nickel cobalt sulphide targets ]]> https://www.proactiveinvestors.com.au/companies/news/185080/great-boulder-resources-to-drill-copper-nickel-cobalt-sulphide-targets-185080.html Great Boulder Resources (ASX:GBR) has identified a number of high-strength electromagnetic conductors at its Mt Venn copper-nickel-cobalt prospect within its Yamarna Project in Western Australia.

The conductors are a result of the 7.5-kilometre ground electromagnetic (EM) survey over the Mt Venn intrusion.

Shallow aircore drilling in the EM survey area has identified signs of copper-nickel-cobalt mineralisation, which bodes well for upcoming deeper drilling.

Great Boulder is now mobilising a reverse circulation (RC) drill crew to Mt Venn next week for a 3,000+ metre drill program.

Stefan Murray, managing director, commented

“The EM survey confirmed very strong conductors in the northern survey area. These conductors are relatively shallow and the aircore geochem has defined a strong and coherent copper-nickel-cobalt trend associated with the peak EM response.

“To the south, the early-time response is masked by the paleochannel, similar to the previously reported airborne XTEM survey.

“However, the more powerful moving loop EM was able to penetrate the paleochannel and identify late-time responses at depth.

“EM plate modelling has been completed by consultants Newexco with more than 30 plates defined.

“Drill hole plans are being finalised to test each plate and an additional copper-zinc-lead-silver anomaly located north of the EM survey that was detected in the aircore drilling.”

Upcoming drilling program

Reverse circulation drill hole planning is currently being finalised to target conductor plates, prioritising coincident copper-nickel mineralisation.

There is circa 9 kilometres of strike to test which will initially be done by scout RC drilling to test the copper and nickel content in the sulphide body.

This information can then be fed back into the EM plate modelling to better constrain the plates for follow-up drilling.

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Thu, 05 Oct 2017 10:47:00 +1100 https://www.proactiveinvestors.com.au/companies/news/185080/great-boulder-resources-to-drill-copper-nickel-cobalt-sulphide-targets-185080.html
<![CDATA[News - Great Boulder Resources picks up high-grade gold in region of multi-million ounce mines ]]> https://www.proactiveinvestors.com.au/companies/news/184175/great-boulder-resources-picks-up-high-grade-gold-in-region-of-multi-million-ounce-mines-184175.html Great Boulder Resources Ltd (ASX:GBR) is already mapping out plans to boost exploration at its Tarmoola project, following rock chips turning up 24g/t gold.

Tarmoola is located 40 kilometres north-west of Leonora in Western Australia.

Great Boulder will now focus its efforts on the Ursus Marionette shear zones and surrounding area, initially with a detailed soil sampling program to pin point the mineralised trends, then with follow-up reverse circulation drilling.

A potential news timeline has the soil sampling completed by early October and the company drilling by November.

Stefan Murphy, managing director, commented: "These results are outstanding and highlight the significant potential of Tarmoola.

"While surface grab samples are only indicative, the identified trend along a structural corridor, with high gold grades and close proximity to a major gold-bearing structure is very encouraging.

"Limited previous exploration appears to have been largely ineffective due to shallow aircore drilling into outcropping bedrock.

"The Marionette shear zone has no modern drilling and is effectively untested."

Proximity to multi-million ounce projects

The program also identified the regionally significant Ursus Fault, which is considered a key gold bearing structure at the +2 million ounce King of the Hills gold mine.

The Ursus fault was mapped extending over 3 kilometres within the Tarmoola project, and the high-grade gold results were coincident with the Marionette shear zone, interpreted as a splay off the Ursus Fault.

Tarmoola is located in the heart of the West Australian Eastern Goldfields, with the +9 million ounce Gwalia mine located 40 kilometres south, the King of the Hills mine located 10 kilometres to the east and the +3 million ounce Thunderbox mine located 40 kilometres north.

Drilling underway at Mt Venn

Great Boulder will also have news flow flowing through soon from Mt Venn, with maiden drilling underway.

READ NOW: Great Boulder turns focus to copper-nickel-cobalt at Mt Venn ]]>
Tue, 19 Sep 2017 10:31:00 +1000 https://www.proactiveinvestors.com.au/companies/news/184175/great-boulder-resources-picks-up-high-grade-gold-in-region-of-multi-million-ounce-mines-184175.html
<![CDATA[News - Great Boulder's Stefan Murphy focused on next exploration steps at Proactive's CEO Sessions ]]> https://www.proactiveinvestors.com.au/companies/news/183854/great-boulder-s-stefan-murphy-focused-on-next-exploration-steps-at-proactive-s-ceo-sessions-183854.html Great Boulder Resources Ltd's (ASX:GBR) managing director, Stefan Murphy, joined Proactive's CEO Sessions in Melbourne on Tuesday 12th September and Sydney on Wednesday 13th September.

Anticipation is building for exploration at the highly prospective Mt Venn copper-nickel-cobalt prospect in Western Australia.

Mt Venn is part of the Yamarna Project near Laverton.

ACCESS THE FULL PRESENTATION HERE ]]>
Fri, 15 Sep 2017 12:35:00 +1000 https://www.proactiveinvestors.com.au/companies/news/183854/great-boulder-s-stefan-murphy-focused-on-next-exploration-steps-at-proactive-s-ceo-sessions-183854.html
<![CDATA[News - Great Boulder Resources turns focus to copper-nickel-cobalt at Mt Venn ]]> https://www.proactiveinvestors.com.au/companies/news/183703/great-boulder-resources-turns-focus-to-copper-nickel-cobalt-at-mt-venn-183703.html Great Boulder Resources Ltd (ASX:GBR) now has its maiden exploration program underway at the Mt Venn copper-nickel-cobalt prospect, located within its Yamarna Project east of Laverton in Western Australia.

This signals the first exploration at Mt Venn since Great Boulder revealed initial assays of up to 1.7% copper plus nickel and cobalt in March this year.

Stefan Murphy, managing director, commented:

"Operating the EM and aircore crews in parallel enables us to quickly define and prioritise our targets for the next phase of reverse circulation and diamond drilling.

"We expect results from both the EM and geochem to be available in early October, which will enable planning for the next phase.

"Heritage clearance has also been given for the next phase of drilling, which will enable us to resume sitework rapidly in October.

"The awarding of the co-funded drilling grant also enables Great Boulder to undertake a more extensive drill program in our next phase as we test for copper-nickel sulphide mineralisation."

READ NOW: Great Boulder's Stefan Murphy brings Mt Venn to Proactive's CEO Sessions ]]>
Mon, 11 Sep 2017 09:07:00 +1000 https://www.proactiveinvestors.com.au/companies/news/183703/great-boulder-resources-turns-focus-to-copper-nickel-cobalt-at-mt-venn-183703.html