Lefroy Exploration Limited’s (ASX: LEX) latest results from two RC drill programmes evaluating the Burns copper (Cu) gold (Au) prospect continue to support a growing Cu-Au-Ag Intrusion related mineral system.
Burns is within the Eastern Lefroy tenement package, which is part of the wholly owned greater Lefroy Gold Project (LGP) located 50km southeast of Kalgoorlie in Western Australia.
The Burns copper gold prospect is situated on the eastern margin of a large interpreted felsic intrusion, termed the Burns Intrusion. The intrusion does not outcrop but features a distinctive annular aeromagnetic and gravity geophysical signature.
Exploration Managing Director, Wade Johnson, said the company has not yet established the association between the larger Burns intrusion and the diorite porphyry intrusions intersected at Burns but consider there is a genetic relationship between them. Broad high-grade gold mineralisation is hosted within a newly discovered hematite-pyritechalcopyrite-magnetite altered diorite porphyry that intrudes high Mg basalt at Burns.
This porphyry, termed the Eastern Porphyry, is open to the north and south. The eastern extent of the Eastern Porphyry is now defined, on multiple drill sections, by foliated basalt (footwall basalt).
The copper and gold mineralisation hosted by both the diorite porphyry, basalt and massive magnetite veins is considered by the company to be a new and unique style of Au-Cu-Ag mineralisation in the area, a land position dominated by Lefroy. The existence of additional mineralisation further east and north under Lake Randall is not discounted by the current drilling campaign and will be the subject of more exploration and drilling that is about to commence.
“We are pleased with the results from the recent RC drill programs that provide further evidence to the growing footprint of the Burns system,” Mr Johnson said.
“The single results from altered diorite from the edge of Lovejoy are exciting and we are very keen to get the lake drilling underway to further expand the system and make that breakthrough that leads to a large Cu-Au-Ag discovery.”
Ongoing Burns Programme
The key objective to progress evaluation of the Burns system in the December Quarter is the completion of the AC drilling in Lake Randall to evaluate multiple targets near to Burns. This stage 2 programme as noted above will commence shortly.
The programme will evaluate multiple targets beneath Lake Randall and filling the geological knowledge gap immediately to the east of the Burns anomaly (baseline section). The priority target is the Lovejoy magnetic anomaly, but also Kenny’s Dream.
The results from hole LEFR297 that just intersects the edge of the Lovejoy anomaly provides confidence that additional altered and mineralised diorite can be discovered beneath Lake Randall. The combined results from this AC and the recent RC drill programme will provide the broad geochemical and geological baseline framework over the 3000m trend to then focus more detailed drill evaluation. For further information please visit: https://lefroyex.com/