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Trinex mining in Western Australian outback

Other Projects

Nerramyne

The Nerramyne Project (one granted licence and one application) covers an 8-10km wide, 45km long region along the margin of the Yilgarn Craton where it is juxtaposed against the Narryer terrane to the northeast of Geraldton in Western Australia.

The Yilgarn and Narryer rocks are mapped predominantly as gneissic terrane, with mafic rocks (hornblendite) in the south. The north-south Darling Fault transects the area.

Limited previous exploration has been completed and has been somewhat marred by the transported wind-blown and alluvial sands covering portions of the project area. Despite this, geochemical sampling has returned anomalous Pd, Pt and Cu results from lag sampling.

Regional regolith sampling by the GSWA has identified a broad low level copper-platinum-palladium anomaly that stretches over a 40km x 6km area.

Five magnetic features have been identified as targets for an initial exploration program of wide-spaced auger or lag sampling.

Berkshire Valley

The Berkshire Valley Project lies within the western gneiss belt of the South West Province of the Yilgarn Craton and consists of meta-sedimentary and igneous rocks, including parallel trends of mafic and ultramafic intrusions that can be clearly seen in magnetic imagery.

Previous investigations by the Co-operative Research Centre for Landscape Environments and Mineral Exploration (CRC LEME) identified the region as having anomalous chrome, copper and nickel associated with mafic and ultramafic units in a 2006 report on laterite geochemistry, and subsequent exploration by IGO from 2006-2008 reaffirmed this.

Although exploration by IGO was primarily targeting gold mineralisation and focussed on the southern tenement at Berkshire Valley, they recognised the presence of the mafic and ultramafic intrusions and routinely assayed their auger geochemical samples and shallow aircore drill samples for a suite of minerals including nickel and copper, however there was no assaying for platinum group elements which are critical in vectoring towards potential sulphide occurrences.

Following routine wide spaced auger sampling, further infill and extensional work was concentrated over 8 kilometres of strike of the western greenstone package that includes several magnetic features which correspond to mafic and ultramafic intrusions. A number of nickel and copper hot spots were identified in this work with gridded results shown in Figure 2.

Very limited and incomplete aircore drilling to follow up low level gold anomalism coincidently reaffirmed the presence of mafic and ultramafic rocks both through geological logging of the drill samples and assay results where values up to 0.48% Ni and 0.2% Cu were recorded close to the northern edge of E70/5204.

The remaining >34 kilometres of interpreted strike remains largely untested.

Petermanns

Large area of prospective ground awaiting grant. Prospective for gold, uranium, copper, nickel and base metals. Extensive geochemical and geophysical program planned.