Reference material OREAS 50c is a porphyry Au-Cu-Mo-S standard prepared from Au-Cu ore and waste rock samples from a porphyry copper-gold deposit located in central western New South Wales, Australia with the addition of minor Mo concentrate.
Mineralisation in the region is hosted by a sequence of late Ordovician to Early Silurian volcanics, intrusives and sediments that occur within the Bogan Gate Synclinorial Zone of the Lachlan Fold Belt. Copper-gold mineralisation occurs as stockwork quartz veins and disseminations associated with potassic alteration. This alteration is intimately associated spatially and temporally with the small finger-like quartz monzonite porphyries that intrude the Goonumbla Volcanics.
|Analyte||Certified Value||1SD||95% Confidence Limits Low||95% Confidence Limits High||Method|
|Au, Gold (ppb)||836||28||824||847||Pb Fire Assay|
|Cu, Copper (wt.%)||0.742||0.016||0.735||0.750||4-Acid Digestion|
|Mo, Molybdenum (ppm)||591||34||574||608||4-Acid Digestion|
|S, Sulphur (wt.%)||0.944||0.047||0.920||0.968||4-Acid Digestion|
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