OREAS 60b

OREAS 60b was prepared from a blend of barren meta-andesite from Cracow, Queensland Australia and gold-bearing meta-andesite from the Gosowong gold mine in Maluku, Indonesia. Both Cracow and Gosowong are epithermal deposits hosted by andesitic volcanics. The barren Cracow material is unmineralised altered andesite of the Camboon volcanics with low sulphidation epithermal quartz veining (epithermal quartz, carbonate, adularia and minor sulphides). The Gosowong ore consists of andesitic volcanic-hosted low sulphidation epithermal quartz veining containing an assemblage of epithermal quartz, carbonate, adularia, kaolin after adularia, chlorite and minor sulphides.

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Au, Gold (ppm) 2.57 0.110 2.52 2.61 Pb Fire Assay
Ag, Silver (ppm) 4.96 0.310 4.78 5.13 Aqua Regia Digestion
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