OREAS 681

OREAS 681 is a platinum group element (PGE) ore certified reference material (CRM) prepared and certified by Ore Research & Exploration Pty Ltd. OREAS 681 has been prepared from PGE ores blended with barren gabbro-norite. The PGE ores were sourced from the Merensky Reef and hanging wall of the Merensky Reef of the Bushveld Complex, from sites owned and operated by Anglo American Platinum, South Africa. The common minerals of economic importance within a pegmatitic pyroxenite host are sulphides of iron, nickel, copper and alloys of the PGE’s. The barren gabbro-norite was sourced from the Late Cambrian Black Hill Norite Complex located 85km east of Adelaide, Australia. OREAS 681 is one of a suite of five PGE ore CRMs ranging in 4E concentrations (4E = 4 elements; platinum (Pt), palladium (Pd), rhodium (Rh) and gold (Au)) from 0.82 to 6.1ppm.

Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Au, Gold (ppb) 51 3 50 52 Pb Fire Assay
Pd, Palladium (ppb) 243 13 237 249 Pb Fire Assay
Pt, Platinum (ppb) 526 16 518 534 Pb Fire Assay
Au, Gold (ppb) 47 5 44 50 NiS Fire Assay
Ir, Iridium (ppb) 11 1 9 12 NiS Fire Assay
Pd, Palladium (ppb) 238 14 230 246 NiS Fire Assay
Pt, Platinum (ppb) 496 33 471 522 NiS Fire Assay
Rh, Rhodium (ppb) 32 3 31 34 NiS Fire Assay
Ru, Ruthenium (ppb) 63 8 60 67 NiS Fire Assay
Al, Aluminium (wt.%) 7.96 0.238 7.84 8.08 Peroxide Fusion ICP
Ba, Barium (ppm) 429 23 415 443 Peroxide Fusion ICP
Be, Beryllium (ppm) 1.84 0.26 1.54 2.14 Peroxide Fusion ICP
Ca, Calcium (wt.%) 6.15 0.165 6.07 6.24 Peroxide Fusion ICP
Ce, Cerium (ppm) 41.3 1.01 40.6 42.1 Peroxide Fusion ICP
Co, Cobalt (ppm) 54 6 51 56 Peroxide Fusion ICP
Cr, Chromium (ppm) 2252 129 2189 2316 Peroxide Fusion ICP
Cs, Caesium (ppm) 4.02 0.245 3.82 4.22 Peroxide Fusion ICP
Cu, Copper (ppm) 272 17 265 280 Peroxide Fusion ICP
Dy, Dysprosium (ppm) 3.49 0.220 3.34 3.65 Peroxide Fusion ICP
Er, Erbium (ppm) 1.95 0.116 1.87 2.04 Peroxide Fusion ICP
Eu, Europium (ppm) 1.42 0.091 1.35 1.48 Peroxide Fusion ICP
Fe, Iron (wt.%) 7.62 0.244 7.50 7.75 Peroxide Fusion ICP
Ga, Gallium (ppm) 18.0 0.60 17.7 18.3 Peroxide Fusion ICP
Gd, Gadolinium (ppm) 4.29 0.58 3.77 4.81 Peroxide Fusion ICP
Ho, Holmium (ppm) 0.64 0.051 0.60 0.69 Peroxide Fusion ICP
K, Potassium (wt.%) 1.36 0.065 1.33 1.39 Peroxide Fusion ICP
La, Lanthanum (ppm) 19.0 1.52 17.8 20.1 Peroxide Fusion ICP
Li, Lithium (ppm) 13.9 0.94 12.9 14.9 Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.26 0.04 0.21 0.30 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 5.26 0.190 5.16 5.35 Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.135 0.004 0.133 0.138 Peroxide Fusion ICP
Nb, Niobium (ppm) 5.88 1.03 5.09 6.67 Peroxide Fusion ICP
Nd, Neodymium (ppm) 21.9 0.99 21.1 22.7 Peroxide Fusion ICP
Ni, Nickel (ppm) 518 35 503 533 Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.136 0.014 0.128 0.145 Peroxide Fusion ICP
Pr, Praseodymium (ppm) 5.26 0.171 5.16 5.37 Peroxide Fusion ICP
Rb, Rubidium (ppm) 82 1.8 81 83 Peroxide Fusion ICP
S, Sulphur (wt.%) 0.106 0.013 0.098 0.113 Peroxide Fusion ICP
Sc, Scandium (ppm) 26.6 2.11 23.8 29.4 Peroxide Fusion ICP
Si, Silicon (wt.%) 24.17 0.672 23.84 24.50 Peroxide Fusion ICP
Sm, Samarium (ppm) 4.64 0.300 4.42 4.87 Peroxide Fusion ICP
Sr, Strontium (ppm) 470 12 464 475 Peroxide Fusion ICP
Tb, Terbium (ppm) 0.59 0.045 0.56 0.62 Peroxide Fusion ICP
Th, Thorium (ppm) 6.39 0.395 6.17 6.60 Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.597 0.018 0.588 0.605 Peroxide Fusion ICP
Tm, Thulium (ppm) 0.26 0.04 0.23 0.29 Peroxide Fusion ICP
U, Uranium (ppm) 1.44 0.089 1.39 1.49 Peroxide Fusion ICP
V, Vanadium (ppm) 257 20 243 271 Peroxide Fusion ICP
Y, Yttrium (ppm) 17.9 0.50 17.6 18.2 Peroxide Fusion ICP
Yb, Ytterbium (ppm) 1.76 0.20 1.64 1.88 Peroxide Fusion ICP
Zn, Zinc (ppm) 92 21 81 102 Peroxide Fusion ICP
Ag, Silver (ppm) 0.118 0.022 0.098 0.138 4-Acid Digestion
Al, Aluminium (wt.%) 7.91 0.213 7.80 8.01 4-Acid Digestion
Ba, Barium (ppm) 442 11 437 446 4-Acid Digestion
Be, Beryllium (ppm) 1.41 0.15 1.34 1.48 4-Acid Digestion
Bi, Bismuth (ppm) 0.098 0.007 0.094 0.102 4-Acid Digestion
Ca, Calcium (wt.%) 5.98 0.197 5.88 6.08 4-Acid Digestion
Ce, Cerium (ppm) 40.6 1.77 39.7 41.5 4-Acid Digestion
Co, Cobalt (ppm) 51 3.2 49 52 4-Acid Digestion
Cr, Chromium (ppm) 1642 264 1510 1773 4-Acid Digestion
Cs, Caesium (ppm) 4.02 0.104 3.97 4.07 4-Acid Digestion
Cu, Copper (ppm) 264 11 259 269 4-Acid Digestion
Dy, Dysprosium (ppm) 3.40 0.166 3.25 3.54 4-Acid Digestion
Er, Erbium (ppm) 1.97 0.066 1.92 2.01 4-Acid Digestion
Eu, Europium (ppm) 1.37 0.101 1.29 1.45 4-Acid Digestion
Fe, Iron (wt.%) 7.47 0.280 7.34 7.61 4-Acid Digestion
Ga, Gallium (ppm) 17.6 0.43 17.3 17.8 4-Acid Digestion
Gd, Gadolinium (ppm) 4.06 0.270 3.85 4.28 4-Acid Digestion
Hf, Hafnium (ppm) 1.70 0.19 1.60 1.81 4-Acid Digestion
Ho, Holmium (ppm) 0.69 0.017 0.68 0.71 4-Acid Digestion
In, Indium (ppm) 0.042 0.004 0.040 0.044 4-Acid Digestion
K, Potassium (wt.%) 1.35 0.064 1.32 1.38 4-Acid Digestion
La, Lanthanum (ppm) 18.8 1.01 18.4 19.3 4-Acid Digestion
Li, Lithium (ppm) 13.0 0.46 12.8 13.2 4-Acid Digestion
Lu, Lutetium (ppm) 0.27 0.012 0.26 0.28 4-Acid Digestion
Mg, Magnesium (wt.%) 5.19 0.174 5.11 5.27 4-Acid Digestion
Mn, Manganese (wt.%) 0.131 0.006 0.128 0.134 4-Acid Digestion
Mo, Molybdenum (ppm) 1.38 0.18 1.29 1.47 4-Acid Digestion
Na, Sodium (wt.%) 1.61 0.050 1.58 1.63 4-Acid Digestion
Nb, Niobium (ppm) 6.17 0.351 5.97 6.36 4-Acid Digestion
Nd, Neodymium (ppm) 21.9 0.59 21.4 22.4 4-Acid Digestion
Ni, Nickel (ppm) 503 26 492 515 4-Acid Digestion
P, Phosphorus (wt.%) 0.141 0.007 0.137 0.144 4-Acid Digestion
Pb, Lead (ppm) 10.2 0.90 9.6 10.7 4-Acid Digestion
Pr, Praseodymium (ppm) 5.32 0.130 5.24 5.41 4-Acid Digestion
Rb, Rubidium (ppm) 80 4.2 78 82 4-Acid Digestion
S, Sulphur (wt.%) 0.109 0.008 0.104 0.114 4-Acid Digestion
Sb, Antimony (ppm) 0.24 0.05 0.22 0.26 4-Acid Digestion
Sc, Scandium (ppm) 27.7 1.52 27.0 28.5 4-Acid Digestion
Sm, Samarium (ppm) 4.82 0.176 4.68 4.96 4-Acid Digestion
Sn, Tin (ppm) 1.89 0.179 1.79 2.00 4-Acid Digestion
Sr, Strontium (ppm) 478 24 465 491 4-Acid Digestion
Ta, Tantalum (ppm) 0.42 0.033 0.39 0.44 4-Acid Digestion
Tb, Terbium (ppm) 0.58 0.031 0.56 0.60 4-Acid Digestion
Th, Thorium (ppm) 6.55 0.542 6.30 6.80 4-Acid Digestion
Ti, Titanium (wt.%) 0.588 0.020 0.578 0.598 4-Acid Digestion
Tm, Thulium (ppm) 0.28 0.011 0.27 0.29 4-Acid Digestion
U, Uranium (ppm) 1.44 0.102 1.40 1.48 4-Acid Digestion
V, Vanadium (ppm) 253 10 248 258 4-Acid Digestion
W, Tungsten (ppm) 1.09 0.109 1.03 1.15 4-Acid Digestion
Y, Yttrium (ppm) 17.5 1.12 16.9 18.1 4-Acid Digestion
Yb, Ytterbium (ppm) 1.77 0.093 1.72 1.83 4-Acid Digestion
Zn, Zinc (ppm) 88 5.8 85 91 4-Acid Digestion
Zr, Zirconium (ppm) 58 6 55 62 4-Acid Digestion
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CRM Group