Lefroy hits more high-grade gold ahead of maiden Lucky Strike resource
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Special Report: Drilling at the aptly named Lucky Strike prospect has delivered multiple high-grade gold hits including the highest gram-meter intersection to date for Lefroy.
This top intersection of 5m at 28.1 grams per tonne (g/t) gold, or 140.5 gram-meters, from 145m sits at the top of a broader 8m zone grading 18.6g/t gold, supporting an interpreted southeast plunging main lode that is open both down dip and down plunge.
It is part of Lefroy Exploration’s (ASX:LEX) recent 37-hole reverse circulation drilling program to infill and better constrain the shallow oxide gold at the prospect within its namesake project near Kalgoorlie, Western Australia.
Oxide mineralisation is easier to mine and process, which is likely to lead to lower mining costs.
Other intersections of 2m at 24.1g/t gold from 70m within a broader 4m intersection grading 14.3g/t gold and 11m at 1.29g/t gold from 118m further supports the existence of a second southeast plunging lode.
Anything above 5g/t is generally considered high grade.
Lefroy says the drilling supports the interpretation that Lucky Strike is part of a larger mineralised structural trend.
It has also improved the confidence in the dimensions of the shallow oxide mineralisation to a depth of about 150m while providing a stronger input to the geometry of the primary control on the mineralisation, recognised as the two ore shoots.
The company said the grade within, and the continuity of these shoots provides confidence in the down plunge potential as well as the opportunity to discover additional blind or hidden ore shoots along strike.
Planning of the next stage of reverse circulation drilling is underway and will include step-out drilling down plunge from the top intersection and the second plunging lode.
Data from the program will be incorporated in the maiden resource for Lucky Strike that is due to be completed in the June 2020 quarter.
Lucky Strike was discovered in 2017 in an unusual banded iron formation (BIF)-hosted rock and really earnt its name last year after drilling returned thick, shallow and high-grade hits including a 9m section grading 8.67g/t gold from a depth of just 49m.
It is located just 35km northeast of Gold Fields’ St Ives processing plant and 5km southwest of Silver Lake Resources (ASX:SLR) Randalls processing plant.