OREAS 505b was prepared from a blend of porphyry copper-gold ores, barren granodiorite and a minor quantity of Mo concentrate. The ores were sourced from both the Northparkes Mine and Ridgeway Mine. Both mines are located in the Central West of New South Wales, Australia. The barren granodiorite was sourced from the mafic, S-Type, Late Devonian Bulla Granodiorite complex located in northern Melbourne, Australia.
Twenty seven commercial analytical laboratories participated in the program to certify the elements reported in Table 1. The following methods were employed:
|Analyte||Indicative Value||1SD||Expanded Uncertainty Low||Expanded Uncertainty High||Method|
|Au, Gold (ppm)||0.552||TBD||TBD||TBD||Pb Fire Assay|
|Cu, Copper (wt.%)||0.322||TBD||TBD||TBD||4-Acid Digestion|
|Ag, Silver (ppm)||1.31||TBD||TBD||TBD||4-Acid Digestion|
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