Lefroy drilling extends porphyry mineralisation at Burns
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Drilling has confirmed that significant mineralisation extends to the north of the Burns copper-gold prospect within Lefroy’s namesake project near Kalgoorlie.
While assays are still pending, visual observation of the first hole on the 40N section, which is 40m north of the zero section, showed that it had intersected a 110m interval of hematite-magnetite-pyrite altered Eastern Porphyry followed by foliated altered basalt to the end of hole at 393.8m.
This intersection at LEFRD261 includes a 39m zone of magnetite, hematite and sulphide altered porphyry from a depth of 222.75m that is strongly similar to intervals from holes LEFD004 and OBURCD025.
Lefroy Exploration (ASX:LEX) noted that of the two holes drilled in the zero north section, one intersected broad zones of pyrite with weak fracturing/haematite alteration in the Eastern Porphyry while the other only hit narrow zones of trace pyrite mineralisation. It did, however, confirm the true width of the Eastern Porphyry.
It added that the five diamond holes drilled on the zero north section have now established at least 180m of vertical depth continuity of altered and mineralised porphyry below the zone of gold-copper mineralisation in LEFR260 and that the Eastern Porphyry has a true width of 120m.
While drilling is currently undertaken using one rig on a single shift, the company plans to accelerate the 3,000m program by moving to a double shift.
The position of the target Eastern Porphyry also allows the company to use older reverse circulation holes as pre-collars.
Its next planned diamond tail will be LEFR262, which will complete the initial drilling on the 40N section.
Drilling will then shift to the 40S section about 40m south of zero north with three holes planned.
Geological observations derived from each diamond hole completed will support and/or refine the Burns geological model to provide further guidance to this copper-gold-silver mineral system and drill target selection.
Assays for LEFD004 are expected in late June while assays for subsequent holes are expected between late June and mid-July.
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.