Lefroy is chasing a unique style of gold mineralisation at Lucky Strike
Special Report: A 4,000m air core (AC) drilling program has now kicked off at the recently discovered Lucky Strike prospect near Kalgoorlie.
In 2018, Lefroy (ASX:LEX) made a greenfields (brand new) gold discovery at Lucky Strike, part of the explorers wholly owned greater Lefroy Gold Project (LGP) near Kalgoorlie.
In September 2019, Lefroy announced its best ever intersection — 18m grading 6.57g/t gold from 68m including a 4m chunk grading an incredible 21.9g/t.
Anything above 5g/t is generally considered high grade.
This gold was found in a deeply oxidized Banded Iron Formation (BIF) unit – a type of rock composed of narrow banded sediments which is generally associated with iron ore deposits, not gold.
This 3km-long oxidised ‘corridor’ is where Lefroy is getting a number of consistently thick, high grade gold intersections.
And when combined with the other rocks, this BIF highlights a unique linear gravity ‘signature’ that can be traced along strike and provide a corridor to focus drilling.
It’s like shining a torch on the best places to drill.
The main BIF unit at Lucky Strike has a strike length of 740m based on RC drilling and is open.
Lefroy’s new 4,000m campaign will focus on evaluating a 700m-long BIF-hosted corridor immediately along strike to the south east of the recently established 79,600oz Lucky Strike gold resource:
The south eastern limit of RC drilling at Lucky Strike intersected 22m at 2.49g/t gold from 63m hosted within an interpreted ‘new’ upper BIF unit that is open along strike and is the immediate focus for this phase of AC drilling, Lefroy says.
“This provides support to the company’s interpretation that there is potential for additional near surface high grade ore shoots along a 700m strike length of the BIF that has only been evaluated by wide spaced aircore drilling by the company in 2017,” it says.
“The current drilling program is designed to test for additional high-grade oxide mineralisation positions that can be followed up by reverse circulation (RC) drilling.”
Results from this program will guide follow up drilling to investigate established intersections from prior wide spaced aircore drilling further south east for at least another 1500m of strike.
The drilling program is expected to be completed by mid-July, with results anticipated in early August.