Drilling evaluating multiple targets at Lefroy’s Burns prospect near Kalgoorlie has paid off with one of the holes outlining a new oxide gold opportunity.

Hole LEFR307, which tested the centre of the large Burns intrusion located 1,600m west of the Burns copper-gold system, intersected an altered monzodiorite porphyry beneath palaeochannel sediments and returned a result of 17m grading 1.7 grams per tonne (g/t) gold from a depth of 75m including 7m at 3.68g/t gold from 80m that is open.

It also returned an intercept of 11m at 0.42g/t gold from 100m that is open in the monzodiorite basement, which supports this as a new host of mineralisation.

Lefroy Exploration (ASX:LEX) notes that the palaeochannel intercept is within the broad east-west trending Lefroy palaeo-drainage network of which 2500m extends east over Burns and beneath Lake Randall.

This gold intercept presents the opportunity to explore for further mineralisation along the entire length of the palaeochannel.

Copper, gold and silver… oh my

Meanwhile, six holes drilled to evaluate the western basalt position have further supported and strengthened this copper-gold-silver zone.

Better results from this include 16m at 0.6% copper, 0.03g/t gold and 0.91g/t silver from 24m, 20m at 0.51% copper, 0.5g/t gold and 1.38g/t gold from 12m and 30m grading 0.39% copper, 0.5g/t gold and 0.64g/t silver from 161m in LEFR310.

Eight proof of concept holes evaluating aeromagnetic targets northwest of Burns also intersected altered rock units and elevated gold-copper-silver-molybdenum geochemical signatures consistent with Burns.

This is in line with the previously reported LEFR297 from Lovejoy that intersected 8m at 0.22g/t gold & 0.51% copper from a depth of 250m to end of hole.

Upcoming work

Lefroy plans to carry out a broad, first-pass drill evaluation of the Burns palaeochannel to expand upon the gold hit at LEFR307.

This is aimed at expanding the basal gold mineralisation and better defining the channel.

Assessment of geochemical data from 2021 RC and diamond drilling program will also be combined with pending assays from the lake drilling program to develop a broader appreciation of the gold-copper-silver-molybdenum footprint to plan the next phase of drilling at Burns.

Separately, a large aircore drill program is currently underway in Lake Randall testing geophysical targets external to the Burns Intrusive complex.




This article was developed in collaboration with Lefroy Exploration, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.