| Description: OREAS 165 is a medium grade copper ore certified reference material (CRM) prepared and certified by Ore Research & Exploration Pth Ltd. The material was sourced from Xstrata's Mt Isa copper ore deposits located near the township of Mt Isa in north-west Queensland. The ore deposits are hosted by brecciated siliceous and dolomitic rock masses within the Urquhart Shale comprising complex and dissociated veins with chalcopyrite, pyrite and pyrrhotite with grades of 3-4% copper. OREAS 165 is one of a suite of seven CRMs characterised for Cu, Fe, S, CaO, MgO, Al2O3, SiO2, Ag, Pb, Zn and Co by both sodium peroxide fusion ICP and 4-acid ICP methods. Download Certificate OREAS165 Download DataPack OREAS165 | Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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| Ag, Silver (ppm) | 3.02 | 0.14 | 2.91 | 3.14 | 4-Acid Digestion | | Al2O3, Aluminium(III) oxide (wt.%) | 2.59 | 0.13 | 2.49 | 2.69 | 4-Acid Digestion | | CaO, Calcium oxide (wt.%) | 0.081 | 0.008 | 0.077 | 0.085 | 4-Acid Digestion | | Co, Cobalt (ppm) | 2445 | 157 | 2333 | 2557 | 4-Acid Digestion | | Cu, Copper (wt.%) | 3.2 | 0.07 | 3.16 | 3.24 | 4-Acid Digestion | | Fe, Iron (wt.%) | 8.86 | 0.22 | 8.69 | 9.03 | 4-Acid Digestion | | MgO, Magnesium oxide (wt.%) | 3.53 | 0.12 | 3.42 | 3.63 | 4-Acid Digestion | | Pb, Lead (ppm) | 443 | 33 | 422 | 464 | 4-Acid Digestion | | S, Sulphur (wt.%) | 8.5 | 0.5 | 8.1 | 9 | 4-Acid Digestion | | Zn, Zinc (ppm) | 37 | 9 | 29 | 45 | 4-Acid Digestion | | Ag, Silver (ppm) | 3.1 | 0.7 | 2.3 | 3.9 | Peroxide Fusion ICP | | Al2O3, Aluminium(III) oxide (wt.%) | 2.61 | 0.08 | 2.55 | 2.67 | Peroxide Fusion ICP | | CaO, Calcium oxide (wt.%) | 0.11 | 0.05 | 0.06 | 0.17 | Peroxide Fusion ICP | | Co, Cobalt (ppm) | 2485 | 104 | 2411 | 2559 | Peroxide Fusion ICP | | Cu, Copper (wt.%) | 3.21 | 0.15 | 3.1 | 3.32 | Peroxide Fusion ICP | | Fe, Iron (wt.%) | 8.86 | 0.23 | 8.69 | 9.04 | Peroxide Fusion ICP | | MgO, Magnesium oxide (wt.%) | 3.48 | 0.12 | 3.4 | 3.57 | Peroxide Fusion ICP | | Pb, Lead (ppm) | 434 | 44 | 402 | 467 | Peroxide Fusion ICP | | S, Sulphur (wt.%) | 8.28 | 0.27 | 8.06 | 8.5 | Peroxide Fusion ICP | | SiO2, Silicon dioxide (wt.%) | 72 | 2.3 | 70.2 | 73.8 | Peroxide Fusion ICP | | Zn, Zinc (ppm) | 44 | 15 | 27 | 61 | Peroxide Fusion ICP |
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