re: Ann: Large Scale Copper-Nickel Prospect I...
roboshan, thanks for your reply. i have found some info that maybe helpful to all.
- 5 km long coincident copper/nickel-in-calcrete anomaly and magnetic target identified on Pundinya in the Gawler Craton.
- Anomalous copper and nickel-in-calcrete with grades of up to 175 ppm Cu and 330 ppm Ni, similar to the initial results reported from the recent Nova discovery in WA.
- Infill sampling currently underway over areas of outcrop.
- Clearances completed facilitating access for drill testing.
Surface geochemical results
A zone of strong coincident Ni and Cu in calcrete anomaly has been defined on the project from previously acquired calcrete sampling programs. The maximum copper in calcrete value is 175 ppm Cu and the maximum nickel value is 330 ppm Ni.
The anomaly is very similar to the geochemical in soils results from the recently announced Sirius Resources (ASX:SIR.AX - News) Nova nickel discovery in Western Australia. The copper in soils at Nova reaches a maximum of 175 ppm Cu and the maximum nickel in soils reaches 373 ppm Ni as shown in the diagram below.
Marmota Energy's Pundinya tenement is located in a similar environment to Nova, but within the Archaean -Palaeoproterozoic Christie Domain of South Australia's Gawler Craton. The bedrock at Durkin is Archaean Mulgathing Complex which comprises gneiss, intruded by mafic and granitic intrusions and cut by a series of shear zones. This lithological setting is very similar to the Nova discovery in WA. Marmota's Durkin nickel anomaly is currently being sampled to follow up existing samples of 300 and 330ppm Ni within calcrete samples. The Durkin area is known to carry high nickel and chromium values reflecting the underlying ultramafic rocks. Historic auger drilling in the area returned 230ppm Ni and 3900ppm Cr. During recent field programs surface outcrops were found to contain a nickel-bearing minerals pentlandite and phyrrotite (magnetic pyrite) which are often associated with nickel sulphides.
Geophysical data over Durkin display geophysical and structural similarities with the Nova discovery. The magnetic data over both projects are interpreted to have a distinct circular geophysical feature associated with the nickel geochemical anomaly (Figure 5).
These results confirm the potential of the Durkin nickel prospect to host large scale nickel-copper sulphide deposits. The Pundinya project is located in the heart of this long established Archaean-Palaeoproterozoic geological province of South Australia. The project area also hosts the Company's Pundinya uranium prospect where grades of up to 3200 ppm uranium returned from assay (previously announced). The strong similarities between the Durkin Ni prospect and Nova discovery bode well for the potential to define a new nickel province in the Gawler Craton
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