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Products > OREAS > Gold - Copper Porphyry >

OREAS 153a Cu (0.712 wt.%) quartz monzonite

Item: OR153a_60g

Unit of measure: ea

Description:

OREAS 153a is one of three porphyry Cu-Au-Mo-S certified reference materials prepared from copper ore from the Waisoi district, Viti Levu, Fiji. The two deposits in the area are the Waisoi East deposit (quartz porphyry) and the Waisoi West deposit (diorite porphyry). Copper mineralisation in the region is accompanied by stockwork quartz veinlets and is characterised by bornite-chalcopyrite-pyrite assemblages. Twenty-one analytical laboratories participated in the program to certify the following elements:

Gold by fire assay (25-50g charge weight) with AAS (11 laboratories), ICP-OES (9 laboratories) finish and ICP-MS (1 laboratory);
Copper, molybdenum and sulphur by 4-acid (HNO3-HF-HClO4-HCl) digestion followed by ICP-OES and/or ICP-MS finish.

Download Certificate OREAS153a

Download DataPack OREAS153a

Analyte	Certified Value	1SD	95% CI Low	95% CI High	Method
Cu, Copper (wt.%)	0.712	0.025	0.701	0.723	4-Acid Digestion
Mo, Molybdenum (ppm)	177	9	173	181	4-Acid Digestion
S, Sulphur (wt.%)	1.27	0.07	1.23	1.3	4-Acid Digestion
Au, Gold (ppb)	311	12	306	315	Pb Fire Assay