Metal Hawk (ASX:MHK) announces that downhole electromagnetic (DHEM) surveying has identified a priority drill target at the Torana prospect at the company’s Berehaven Project, 20km south-east of Kalgoorlie.
Torana is located 1.5 kilometres north and along strike from the Commodore Prospect, Metal Hawk discovered ‘high-grade’ nickel sulphide in September 2021.
The compay notes that reverse circulation (RC) drilling carried out at Torana has intersected significant thicknesses of high-MgO rocks where previously no ultramafic lithologies had been identified.
Significant zones of disseminated nickel sulphide mineralisation have been logged from drill chips in numerous holes, highlighted by the intersection from BVNC020 which returned 10m @ 0.55% Ni from 130m within a broader zone of 30m @ 0.37% Ni from 125m.
DHEM surveys have been completed in a number of RC holes at Torana, with the northern-most hole BVNC029 detecting a strong late-time off-hole anomaly with a 140ms time constant.
A large west-dipping plate TDC_29 has been modelled with a source that is distal to the hole, measuring a high conductance of 3,000 Siemens.
Commenting on the results, Metal Hawk Managing Director Will Belbin said: “Our systematic drilling has shown that the ultramafics along the Commodore trend are fertile.
“Our systematic drilling has shown that the ultramafics along the Commodore trend are fertile”
At Torana we have intersected thick packages of high-MgO rocks under cover, where no ultramafics have previously been identified.
Situated beneath a zone of disseminated nickel , this new DHEM conductor presents as an exciting target which will be tested with deeper drilling.”
Metal Hawk reports that moving loop electromagnetic (MLEM) surveys carried out previously detected a zone of conductivity in a similar position, however, due to the depth of the conductor, a poorly constrained plate was modelled with an unknown dip.
The new DHEM data combined with MLEM survey data has enabled the of a more refined plate model.
Notably, the top edge of conductor TDC_29 is positioned down-dip and 200m from the zone of disseminated nickel sulphide mineralisation intersected in BVNC020.
Follow-up drilling at Berehaven is due to commence within the next week and will include RC holes designed to further explore along strike from zones of disseminated mineralisation intersected at Torana.
Additional DHEM surveys will be carried out to further investigate and refine the electromagnetically conductive target zone. Ultimate drill-testing of conductor TDC_29 will require deeper diamond drilling, with a downhole target depth of approximately 420m.
This will be done following completion of the upcoming RC program.
RC drilling and DHEM will also be carried out at the Commodore South Prospect, located about 500m south of Commodore, where a recent intersection of disseminated and blebby sulphide mineralisation in BVNC033 returned 2m @ 0.54% Ni from 171m within a broader ultramafic package of 13m @ 0.24% Ni from 167m.
Images: Metal Hawk Limited
