St George Mining Ltd’s (ASX:SGQ) drilling program has moved from Stricklands to test new EM conductors at the Mt Alexander Nickel-Copper-Sulphide Project in Western Australia’s north-eastern Goldfields.
Drilling started on February 22 at the Investigators and West End prospects, testing the strongest off-hole EM anomalies identified from a DHEM survey in hole MAD185.
New EM conductors
The first target is modelled with conductivity of 33,100 Siemens which is predicted to be intersected at 340 metres downhole.
The second target to be drilled will be the strongest of the two off-hole anomalies identified from a DHEM survey in MAD192.
That conductor is modelled with conductivity of 55,550 Siemens and is predicted to be intersected at 505 metres downhole.
These conductors have an electrical signature consistent with massive sulphides.
MAD185 and MAD192 intersected thick mafic-ultramafic units with disseminated nickel-copper sulphides – indicative of a fertile intrusive with prospectivity for higher-grade mineralisation proximal to the hole.
COVID-19 travel and movement restrictions introduced in Western Australia on January 31 have significantly impacted the availability of drill crews.
A replacement crew was unable to travel to Mt Alexander for the scheduled shift change on February 9, 2021, and drilling has continued with a single shift since that date.
The second drill crew is expected to arrive at Mt Alexander soon to allow drilling to resume 24/7.
Stricklands metallurgical holes
Seven diamond core holes have been drilled at the Stricklands Prospect to provide samples of mineralisation for test-work underway with XPS in Canada.
A total of 483.2 metres was drilled for these metallurgical holes.
Drill core tray for STD015, showing massive sulphides intersected from 67.3 metres.
All holes were within the existing resource envelope for Stricklands with abundant nickel-copper sulphides intersected for the required test-work.
Deeper drilling at Stricklands is also planned to test for potential extensions of the mineralisation down-plunge and below the existing resource envelope.
The core from the latest metallurgical holes is being cut, following which selected samples will be prepared for air freight to Canada.
St George is working closely with XPS to ensure further test-work will be completed as soon as practicable.
COVID-19 restrictions in Canada, including lockdown of certain areas, may impact on the timing for completion of the test-work.
MLEM survey for E29/548
A moving loop EM (MLEM) survey is scheduled in mid-March for areas of interest on exploration licence E29/548.
The survey will search for discrete conductive bodies that may represent mineralisation within the large conductive features identified by the magnetotelluric (MT) survey carried out in this area in 2020.
These conductive features trend east-west and are parallel to the highly mineralised Cathedrals Belt.
Drilling of similar zones at the Cathedrals Belt confirmed the presence of thick intrusive-style rocks with potential to host significant nickel-copper sulphide mineralisation.
Regional aeromagnetic survey
A new aeromagnetic survey is scheduled to be carried out in April over the recently acquired tenements of E29/972 and E29/1041.
The high-resolution survey will be completed with 100-metre line spacing.
2021 drilling program
Drill hole MAD194 was completed at Investigators at the start of the 2021 drill program while earthworks were completed for the new holes planned at West End and Stricklands.
The hole was designed as an infill hole to test for mineralisation between known nickel-copper sulphides in MAD44 and MAD124 and was completed to a downhole depth of 201.2 metres.
St George intersected a thick ultramafic package between 175.85 metres and 188.6 metres with disseminated sulphides and blebby sulphides increasing with depth are observed in this interval.