Development of Tungsten Ore Industry-III

Newcrest Mining Limited (Newcrest) released updated reserve and revised resource figures in December 2012 for its O'Callaghans polymetallic tungsten-copper-zinc-lead skarn deposit about 10 kilometres south of Telfer in WA. The company reported Probable Reserves of 59 Mt grading 0.28% WO3, 0.29% Cu, 0.62% zinc (Zn) and 0.3% lead (Pb), with a contained 0.16 Mt of WO3, all within Indicated Resources of 69 Mt grading 0.34% WO3, 0.29% Cu, 0.55% Zn and 0.27% Pb, and Inferred Resources of 9 Mt grading 0.25% WO3, 0.24% Cu, 0.15% Zn and 0.07% Pb. Mineralisation occurs within a sub-horizontal polymetallic skarn at the contact between the Neoproterozoic O'Callaghans granite and limestone of the Proterozoic Puntapunta Formation. Newcrest has previously indicated it is undertaking a pre-feasibility study into the deposit. Based on its 2011-12 results, Newcrest was indicating potential development of the O'Callaghans deposit within the next five years, subject to board approval.



 

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