A 37-hole drilling campaign at Lefroy Exploration’s (ASX: LEX) Lucky Strike gold target near Kalgoorlie has delivered multiple high-grade gold intersections and advanced understanding of the geometry of the two plunging mineralised structures.
Drilling over 5,401m commenced last month on 10 drill sections to evaluate approximately 480m of strike immediately to the south-east of the Lucky Strike discovery zone.
The campaign was aimed at the definition of the shallow oxide mineralisation within a Banded Iron Formation (BIF) host rock identified from multiple phases of drilling during 2019.
Results have confirmed two robust zones of oxide gold mineralisation interpreted to form the shallow expression of shallow-plunging ore shoots which remain open at depth.
The mineralisation is hosted within a main BIF unit defined over a 740m strike length and open to the south-east and under cover.
Significant high-grade intersections include 8m at 18.6 grams per tonne gold from 145m, including 5m at 28.1g/t gold from 145m; 4m at 14.3g/t gold from 70m, including 2m at 24.1g/t gold from 70m; and 3m at 7.79g/t gold from 130m.
The mineralisation is masked beneath approximately 12m of transported cover, which remained unrecognised in a 2017 wide-spaced aircore drilling program.
“The discovery of this new mineralisation was guided by the coincidence of the deepening level of oxidation to the south-east of Lucky Strike and the linear gravity anomaly,” the company said.
“These results provide further support for the interpretation that Lucky Strike is part of a larger mineralised structural trend.”
Lefroy’s drilling to date has been confined to a 740m prospective structural corridor within the 3,000m-long Lucky Strike trend defined by wide-spaced aircore drilling and adjacent to the regional scale Mt Monger Fault.
The trend was identified after integration of previous exploration with detailed ground gravity data.
The area near the target has been a continued high priority exploration focus for Lefroy, with gold anomalies identified at Red Dale, Havelock, Neon, Capstan and more recently Mulga 3 and Burns, highlighting the district-scale gold prospectivity.
The next stage of exploration planning is underway and will include step-out reverse circulation drilling down plunge from recently-completed holes.
Lefroy said it would aim to commence resource modelling to deliver a maiden resource estimate by mid-year.