Specifications
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CRM State:
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Matrix:
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Mineralisation:
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 |
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Au, Gold (ppb) | 836 | 28.0 | 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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