Trigg Mining Ltd (ASX:TMG) is taking the next step in establishing the endowment of its large sulphate of potash (SOP) tenure near Laverton in WA by mobilising a geophysics team and an aircore drill rig.
Exploration and resource definition drilling will begin at the Laverton Lakes SOP Project with the company also seeking heritage clearance from the Ngaanyatjarra traditional owners at the highly prospective Lake Throssell project.
This would pave the way for a shallow pit sampling program of the playa lake surface.
Focus on essential fertiliser
Recently listed Trigg is looking to secure Australia’s sustainable agriculture future through exploration for essential potassium fertiliser, sulphate of potash, which is necessary for global food production and human nutrition.
SOP provides essential macronutrients for plant growth without any detrimental elements, such as chloride found in muriate of potash (MOP).
In addition, SOP can be produced sustainably through the solar evaporation of potassium-rich hypersaline brine water, without the need for large open pits or waste-rock dumps.
Targeting initial estimates
Managing director Keren Paterson said, “We are very pleased to have exploration underway across Trigg’s sulphate of potash projects.
“Over the coming weeks we will see drilling occur across the Laverton Links SOP Project where we are targeting the reporting of an initial mineral resource estimate.
“At Lake Throssell reconnaissance exploration will commence once Trigg has secured heritage clearance from the Ngaanyatjarra traditional owners.
“We look forward to reporting the results from each of these programs to our shareholders in the New Year.”
Laverton Links first focal point
Trigg listed on the ASX last month after completing a $4.5 million IPO and has about 2,640 square kilometres of granted tenure for SOP across the two projects.
Trigg Mining’s SOP projects showing established infrastructure and prospect locations.
The Laverton Links project consists of three prospect areas - Lake Rason, Lake Hope Campbell and East Laverton - covering 2,315 square kilometres of granted tenure 35-190 kilometres east of Laverton.
This project is near established energy and transport infrastructure including two gas pipelines, roads, rail and a commercial airport.
Three initial targets
The initial exploration is aimed at:
- Targeting an initial mineral resource at Lake Rason prospect with a 500-metre aircore drilling program to convert the current exploration target to a mineral resource estimate;
- Targeting an initial mineral resource at the Lake Hope Campbell prospect with a 1,400 metre-aircore drilling program; and
- Determine the prospectivity of the East Laverton prospect with a gravity survey to refine drill hole locations followed by an initial aircore drilling program of 1,000 metres.
Lake Rason contains more than 215 square kilometres of playa lake surface and underlying palaeochannel.
It is the most advanced of Trigg’s prospects with early exploration including geophysics and an aircore drilling program defining a JORC-compliant exploration target.
The 500-metre aircore program will supplement previous exploration data and aid in calculating an initial resource estimate covering the salt lake and the underlying palaeochannel.
Results from the program are expected to be available in the March quarter of 2020.
1,400 metres planned
Lake Hope Campbell is west of Lake Rason and contains in excess of 100 kilometres of interpreted palaeochannel and scattered playa areas.
Early shallow pit sampling has identified mineralisation along the strike of the tenure.
The initial drilling will test the palaeochannel with around 1,400 metres of aircore drilling to measure the aquifer physical characteristics and SOP grade.
Results from the program are expected to be available in the first quarter of 2020, including a potential initial resource estimate.
Survey and drilling
East Laverton prospect is about 35 kilometres east of Laverton and contains around 130 kilometres of interpreted palaeochannel and scattered playa areas.
This prospect has not yet been explored for SOP and the current program includes a gravity survey and around 1,000 metres of aircore drilling to determine the aquifer characteristics and identify any potential mineralisation.
A gravity survey is underway and will refine drill hole locations for the aircore drilling.
Trigg’s SOP projects in relation to the Western Australian agriculture area.
Heritage clearance sought
Lake Throssell is a highly prospective SOP project and lies around 200 kilometres east of Laverton along the Great Central Road.
It covers about 323 square kilometres of predominantly playa lake area and underlying palaeochannel.
In 2017 Trigg and the traditional owners entered into an exploration access agreement and under this agreement, a heritage survey has been scheduled for later this month in preparation of shallow pit sampling across the lake surface.
The heritage survey is anticipated to provide Trigg with the clearance to undertake exploration activities.
Shallow pit sampling will test the hypothesis that the very high gypsum index across the lake surface indicates the potential for highly concentrated brines.
This sampling is planned for the June quarter of 2020 with results expected to be available by the September quarter, subject to the heritage clearance.