OREAS H3 was prepared from gold-copper oxide ore from the Hedges Mine located in the southwest Yilgarn Block of Western Australia. This deposit and the adjacent Boddington Mine deposit are hosted by diorite-andesite intrusive and volcanic rocks of the Saddleback Greenstone Belt. The mineralisation is structurally-controlled and intrusion-related and formed by two overprinting Archaean magmatic-hydrothermal systems. The earliest mineralisation comprises widespread silica-biotite alteration while the second stage comprises complex quartz-albite-molybdenite veins (controlling Mo distribution), clinozoisite-sulphide-quartz-biotite veining (controlling low grade skarn Au-Cu mineralisation) and actinolite, carbonate-chlorite-sulphide and sulphide veins (controlling high grade mineralisation).

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Au, Gold (ppm) 2.00 0.080 1.97 2.04 Pb Fire Assay
Ag, Silver (ppm) 4.95 0.300 4.85 5.06 4-Acid Digestion
Cu, Copper (ppm) 443 22 432 455 4-Acid Digestion
Certificate DataPack SDS NRAM (231 KB)

This CRM is no longer available.
Information is provided for reference only.