THE DRILL SERGEANT: Middle Island Resources (ASX: MDI) received final assay results for a Stage 1 infill diamond drilling program the company completed in July at its wholly-owned Sandstone gold project in Western Australia.
Middle Island Resources explained the drilling program comprised infill diamond drilling in the upper half of the tonalite deeps deposit at Two Mile Hill.
The drilling comprised seven drill holes (MSDD262-MSDD268) and included RC pre-collar and diamond drilling at the Two Mile Hill tonalite deeps deposit and was designed to infill existing diamond drilling within the upper half of the tonalite deeps deposit, extending from 140 metres depth (base of the open pit Mineral Resource) to approximately 420m depth.
Several intersections returned from the tonalite, including:
165 metres at 1.11 grams per tonne gold from 85m, including 7m at 4.73g/t gold from 123m, 5m at 6g/t gold from 142m and 10m at 3.34g/t gold from 202m depth; and
150m at 1.03g/t gold from 84m, including 34m at 1.85g/t gold from 96m depth.
A new zone of high-grade mineralisation was identified within the banded iron formation (BIF), returning:
5m at 21.9g/t gold from 339m, including 2m at 54g/t gold from 340m depth.
Shallow gold intercepts were also encountered within basalts along the north-eastern tonalite contact, of:
93m at 2.57g/t gold from surface, including 35m at 6.27g/t gold from 58m depth; and
9m at 5.23g/t gold from 85m depth.
“As anticipated from infill diamond drilling, the tonalite intercepts returned from the Two Mile Hill deeps gold deposit serve to confirm the earlier results,” Middle Island Resources managing director Rick Yeates said in the company’s announcement to the Australian Securities Exchange.
“It is also extremely pleasing to identify a further significant new zone of pyrite replacement-style gold mineralisation within the BIF adjacent to the tonalite contact, particularly as it is somewhat divorced from the main tonalite body.
“It is also the first significant intersection identified within brecciated elements of the BIF package and one, of only a few, recorded in the more sparsely drilled Middle BIF unit.
“Utilising these results, resource modelling of the Exploration Target will provide a formal Mineral Resource the upper half of the Two Mile Hill tonalite deeps Exploration Target, provide better resolution on the distribution of gold mineralisation within the tonalite which, together with the recently completed ore sorting campaign and geotechnical findings, will facilitate a more robust assessment of the underground mining potential.”