OREAS 520c

OREAS 520c was prepared from a blend of iron oxide copper-gold (IOCG) ore, barren rhyodacite and iron oxide ore. The IOCG ore was sourced from the Ernest Henry Mine located about 38 kilometres north-east of Cloncurry in north-west Queensland. IOCG mineralisation at the Ernest Henry Mine is hosted in breccia comprising strongly altered and replaced felsic volcanic fragments in a matrix largely composed of magnetite, calcite, pyrite, biotite, chalcopyrite, K feldspar titanite and quartz. Accessory minerals include garnet, barite, molybdenite, fluorite, amphibole, apatite, monazite, arsenopyrite, a LREE fluorcarbonate, galena, cobaltite, sphalerite, scheelite, uraninite and tourmaline. Copper occurs as native copper, bornite and chalcopyrite. Gold occurs mainly in the molecular framework of the chalcopyrite. Significant levels of cobalt, molybdenum, rare earth elements and low levels of uranium are also present.

The Certification Program will include:

• Gold by fire assay (25-50g charge weight) with AAS, ICP-OES or ICP-MS finish
• Gold by aqua regia digestion (15-30g sample weight) with AAS, ICP-OES or ICP-MS finish
• Full ICP-OES and ICP-MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl) digestion
• Full ICP-OES and ICP-MS elemental suites by aqua regia digestion
• Full ICP-OES and ICP-MS elemental suites by peroxide fusion
• Ag, As, Cu, Co, Fe, Mo and S by 3-acid (HNO3-HClO4-HCl) digestion with ICP-OES finish
• Total Sulphur by infrared combustion furnace and
• Fluorine by various methods.