OREAS 166

OREAS 166 is a high 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 166 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.

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Cu, Copper (wt.%) 8.75 0.350 8.54 8.97 Peroxide Fusion ICP
Fe, Iron (wt.%) 11.45 0.430 11.15 11.75 Peroxide Fusion ICP
Co, Cobalt (ppm) 1970 108 1894 2046 4-Acid Digestion
Ag, Silver (ppm) 12.0 1.00 8.0 15.0 Peroxide Fusion ICP
Al2O3, Aluminium(III) oxide (wt.%) 1.34 0.050 1.30 1.37 Peroxide Fusion ICP
CaO, Calcium oxide (wt.%) 0.980 0.050 0.940 1.010 Peroxide Fusion ICP
Co, Cobalt (ppm) 2077 142 1989 2165 Peroxide Fusion ICP
MgO, Magnesium oxide (wt.%) 1.67 0.040 1.65 1.69 Peroxide Fusion ICP
Pb, Lead (ppm) 128 27 108 148 Peroxide Fusion ICP
S, Sulphur (wt.%) 11.29 0.330 11.04 11.54 Peroxide Fusion ICP
SiO2, Silicon dioxide (wt.%) 61.40 2.000 60.00 62.90 Peroxide Fusion ICP
Zn, Zinc (ppm) 37.0 10.0 23.0 51.0 Peroxide Fusion ICP
Ag, Silver (ppm) 10.8 0.70 10.3 11.4 4-Acid Digestion
Al2O3, Aluminium(III) oxide (wt.%) 1.38 0.050 1.34 1.42 4-Acid Digestion
CaO, Calcium oxide (wt.%) 0.980 0.030 0.960 1.000 4-Acid Digestion
Cu, Copper (wt.%) 8.82 0.270 8.62 9.01 4-Acid Digestion
Fe, Iron (wt.%) 11.38 0.190 11.33 11.43 4-Acid Digestion
MgO, Magnesium oxide (wt.%) 1.67 0.050 1.63 1.71 4-Acid Digestion
Pb, Lead (ppm) 140 9 133 146 4-Acid Digestion
S, Sulphur (wt.%) 11.60 0.600 10.90 12.30 4-Acid Digestion
Zn, Zinc (ppm) 37.0 2.00 35.0 39.0 4-Acid Digestion
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