Western Mines Group Ltd (ASX:WMG) has observed Cu-Zn mineralisation at shallow depths in the final hole of a successful ten-hole diamond drilling programme at the Mulga Tank Ni-Cu-PGE Project in Western Australia’s Eastern Goldfields.
The drilling programme totalled 3,990m and was designed to test a wide range of geological and geophysical exploration targets around the Mulga Tank Ultramafic Complex.
The final hole MTD021 was drilled to test the up-dip component of the high conductance NW3 Conductor EM anomaly in the Panhandle area of the project.
The hole intersected significant Cu-Zn mineralisation within a black shale unit containing extensive banded sulphides (25-35% sulphide) between 110m to 134m depth.
Numerous spot pXRF readings in excess of 1% Cu were observed in two horizons down the hole. The hole did not test the main core of the modelled NW3 Conductor so this sulphide-rich unit may extend for considerable strike and depth.
“Whilst the last hole MTD021 was the only one of the programme not to fit our geological model it is certainly a very interesting result encountering significant Cu-Zn sulphide mineralisation at shallow depths,” Managing Director, Caedmon Marriott, said.
“The core of the EM anomaly was not drilled and this sulphide unit could be quite extensive. The mineralisation is likely associated with late stage hydrothermal fluids around the complex or the geological environment possibly suggests nearby VMS-style mineralisation.”
The company is methodically using a portable X-ray fluorescence (pXRF) device on site as part of its exploration and geochemical vectoring approach during the drilling programme. Spot pXRF readings for hole MTD021 were taken at 50cm intervals down the core.
Processed pXRF data is presented for hole MTD021 below. Numerous spot pXRF readings in excess of 1% Cu where observed in two horizons down the hole, with a mean average of 0.8% Cu for 8 readings between 110.5m and 113m and a mean average of 1.3% Cu for 8 readings between 128.5m and 130.5m. Anomalous Zn readings of up to 1.8% Zn were also observed associated with the Cu results.
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