| Description: OREAS 501c was prepared from a blend of porphyry copper-gold ore, barren granodiorite and a minor quantity of Cu-Mo concentrate. The ore was sourced from the Ridgeway underground mine located in the Cadia Valley Operations (CVO) situated in central western New South Wales, Australia. The barren I-type hornblende-bearing granodiorite was sourced from the Late Devonian Lysterfield granodiorite complex located in eastern Melbourne, Australia. Thirty commercial analytical laboratories participated in the program to characterise the elements reported in Tables 1 to 4. The following methods were employed: - Gold via 25-40g fire assay with AAS (18 labs) or ICP-OES (12 labs) finish;
- Gold via 15-50g aqua regia digestion with ICP-MS (13 labs), ICP-OES (2 labs) or AAS (6 labs) finish;
- Four acid digestion for full elemental suite ICP-OES and ICP-MS (30 laboratories);
- Aqua regia digestion for full elemental suite ICP-OES and ICP-MS (25 laboratories);
- Instrumental neutron activation analysis for Au on 1g subsamples to confirm homogeneity (1 laboratory).
Download Certificate OREAS501c Download DataPack OREAS501c | Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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| Ag, Silver (ppm) | 0.461 | 0.053 | 0.436 | 0.486 | 4-Acid Digestion | | Al, Aluminium (wt.%) | 7.49 | 0.331 | 7.36 | 7.61 | 4-Acid Digestion | | As, Arsenic (ppm) | 23.9 | 2 | 23.1 | 24.6 | 4-Acid Digestion | | Ba, Barium (ppm) | 1044 | 53 | 1025 | 1062 | 4-Acid Digestion | | Be, Beryllium (ppm) | 2.94 | 0.178 | 2.87 | 3.01 | 4-Acid Digestion | | Bi, Bismuth (ppm) | 0.69 | 0.041 | 0.67 | 0.71 | 4-Acid Digestion | | Ca, Calcium (wt.%) | 2.64 | 0.154 | 2.58 | 2.7 | 4-Acid Digestion | | Cd, Cadmium (ppm) | 0.18 | 0.03 | 0.16 | 0.19 | 4-Acid Digestion | | Ce, Cerium (ppm) | 69 | 5.4 | 66 | 71 | 4-Acid Digestion | | Co, Cobalt (ppm) | 15.1 | 0.74 | 14.8 | 15.4 | 4-Acid Digestion | | Cr, Chromium (ppm) | 80 | 10 | 76 | 84 | 4-Acid Digestion | | Cs, Caesium (ppm) | 11.7 | 0.63 | 11.4 | 11.9 | 4-Acid Digestion | | Cu, Copper (wt.%) | 0.276 | 0.008 | 0.273 | 0.278 | 4-Acid Digestion | | Dy, Dysprosium (ppm) | 4.63 | 0.451 | 4.34 | 4.93 | 4-Acid Digestion | | Er, Erbium (ppm) | 2.62 | 0.235 | 2.45 | 2.79 | 4-Acid Digestion | | Fe, Iron (wt.%) | 4.45 | 0.222 | 4.37 | 4.52 | 4-Acid Digestion | | Ga, Gallium (ppm) | 19.1 | 0.84 | 18.7 | 19.4 | 4-Acid Digestion | | Gd, Gadolinium (ppm) | 5.04 | 0.401 | 4.77 | 5.31 | 4-Acid Digestion | | Hf, Hafnium (ppm) | 2.6 | 0.165 | 2.53 | 2.66 | 4-Acid Digestion | | Ho, Holmium (ppm) | 0.93 | 0.038 | 0.91 | 0.94 | 4-Acid Digestion | | In, Indium (ppm) | 0.075 | 0.006 | 0.073 | 0.078 | 4-Acid Digestion | | K, Potassium (wt.%) | 3.22 | 0.198 | 3.15 | 3.3 | 4-Acid Digestion | | La, Lanthanum (ppm) | 35.2 | 2.49 | 34.3 | 36 | 4-Acid Digestion | | Li, Lithium (ppm) | 33.8 | 2 | 33.1 | 34.5 | 4-Acid Digestion | | Lu, Lutetium (ppm) | 0.36 | 0.036 | 0.34 | 0.39 | 4-Acid Digestion | | Mg, Magnesium (wt.%) | 1.51 | 0.091 | 1.47 | 1.54 | 4-Acid Digestion | | Mn, Manganese (wt.%) | 0.055 | 0.003 | 0.054 | 0.056 | 4-Acid Digestion | | Mo, Molybdenum (ppm) | 97 | 3 | 96 | 98 | 4-Acid Digestion | | Na, Sodium (wt.%) | 2.02 | 0.094 | 1.99 | 2.05 | 4-Acid Digestion | | Nb, Niobium (ppm) | 18.4 | 1.77 | 17.6 | 19.1 | 4-Acid Digestion | | Nd, Neodymium (ppm) | 30 | 3.3 | 27.8 | 32.2 | 4-Acid Digestion | | Ni, Nickel (ppm) | 60 | 3.6 | 59 | 61 | 4-Acid Digestion | | P, Phosphorus (wt.%) | 0.101 | 0.005 | 0.099 | 0.102 | 4-Acid Digestion | | Pb, Lead (ppm) | 21.5 | 1.42 | 20.9 | 22 | 4-Acid Digestion | | Pr, Praseodymium (ppm) | 7.91 | 0.749 | 7.42 | 8.4 | 4-Acid Digestion | | Rb, Rubidium (ppm) | 196 | 13 | 191 | 202 | 4-Acid Digestion | | S, Sulphur (wt.%) | 0.347 | 0.017 | 0.341 | 0.353 | 4-Acid Digestion | | Sb, Antimony (ppm) | 2.27 | 0.163 | 2.2 | 2.33 | 4-Acid Digestion | | Sc, Scandium (ppm) | 12.9 | 1.4 | 12.3 | 13.6 | 4-Acid Digestion | | Se, Selenium (ppm) | 2.07 | 0.56 | 1.83 | 2.3 | 4-Acid Digestion | | Sm, Samarium (ppm) | 5.74 | 0.499 | 5.44 | 6.04 | 4-Acid Digestion | | Sn, Tin (ppm) | 3.38 | 0.207 | 3.29 | 3.48 | 4-Acid Digestion | | Sr, Strontium (ppm) | 322 | 17 | 316 | 328 | 4-Acid Digestion | | Ta, Tantalum (ppm) | 1.32 | 0.128 | 1.25 | 1.39 | 4-Acid Digestion | | Tb, Terbium (ppm) | 0.8 | 0.061 | 0.76 | 0.84 | 4-Acid Digestion | | Te, Tellurium (ppm) | 0.25 | 0.021 | 0.24 | 0.26 | 4-Acid Digestion | | Th, Thorium (ppm) | 18.9 | 1.79 | 18.2 | 19.6 | 4-Acid Digestion | | Ti, Titanium (wt.%) | 0.48 | 0.024 | 0.471 | 0.489 | 4-Acid Digestion | | Tl, Thallium (ppm) | 0.97 | 0.055 | 0.95 | 1 | 4-Acid Digestion | | Tm, Thulium (ppm) | 0.36 | 0.024 | 0.34 | 0.38 | 4-Acid Digestion | | U, Uranium (ppm) | 5.13 | 0.54 | 4.92 | 5.34 | 4-Acid Digestion | | V, Vanadium (ppm) | 120 | 8 | 117 | 122 | 4-Acid Digestion | | W, Tungsten (ppm) | 4.48 | 0.349 | 4.38 | 4.58 | 4-Acid Digestion | | Y, Yttrium (ppm) | 24.9 | 1.39 | 24.4 | 25.5 | 4-Acid Digestion | | Yb, Ytterbium (ppm) | 2.42 | 0.25 | 2.3 | 2.55 | 4-Acid Digestion | | Zn, Zinc (ppm) | 81 | 4.7 | 79 | 83 | 4-Acid Digestion | | Zr, Zirconium (ppm) | 81 | 7.5 | 78 | 84 | 4-Acid Digestion | | Ag, Silver (ppm) | 0.444 | 0.027 | 0.429 | 0.458 | Aqua Regia Digestion | | Al, Aluminium (wt.%) | 2.17 | 0.116 | 2.11 | 2.23 | Aqua Regia Digestion | | As, Arsenic (ppm) | 24.3 | 1.54 | 23.7 | 24.8 | Aqua Regia Digestion | | Au, Gold (ppm) | 0.214 | 0.009 | 0.21 | 0.217 | Aqua Regia Digestion | | Ba, Barium (ppm) | 428 | 20 | 420 | 437 | Aqua Regia Digestion | | Be, Beryllium (ppm) | 0.59 | 0.08 | 0.52 | 0.66 | Aqua Regia Digestion | | Bi, Bismuth (ppm) | 0.7 | 0.042 | 0.68 | 0.72 | Aqua Regia Digestion | | Ca, Calcium (wt.%) | 1.02 | 0.085 | 0.98 | 1.07 | Aqua Regia Digestion | | Ce, Cerium (ppm) | 64 | 4.7 | 61 | 66 | Aqua Regia Digestion | | Co, Cobalt (ppm) | 14.2 | 0.6 | 13.9 | 14.5 | Aqua Regia Digestion | | Cr, Chromium (ppm) | 68 | 2.7 | 66 | 69 | Aqua Regia Digestion | | Cs, Caesium (ppm) | 9.88 | 0.56 | 9.61 | 10.16 | Aqua Regia Digestion | | Cu, Copper (wt.%) | 0.275 | 0.006 | 0.273 | 0.276 | Aqua Regia Digestion | | Dy, Dysprosium (ppm) | 3.31 | 0.249 | 3.07 | 3.56 | Aqua Regia Digestion | | Er, Erbium (ppm) | 1.74 | 0.24 | 1.43 | 2.05 | Aqua Regia Digestion | | Fe, Iron (wt.%) | 4.1 | 0.247 | 4 | 4.2 | Aqua Regia Digestion | | Ga, Gallium (ppm) | 8.56 | 0.94 | 8.12 | 8.99 | Aqua Regia Digestion | | Gd, Gadolinium (ppm) | 4.02 | 0.381 | 3.67 | 4.37 | Aqua Regia Digestion | | Hf, Hafnium (ppm) | 0.4 | 0.038 | 0.38 | 0.42 | Aqua Regia Digestion | | Ho, Holmium (ppm) | 0.62 | 0.08 | 0.52 | 0.73 | Aqua Regia Digestion | | In, Indium (ppm) | 0.047 | 0.005 | 0.043 | 0.051 | Aqua Regia Digestion | | K, Potassium (wt.%) | 1.17 | 0.069 | 1.14 | 1.19 | Aqua Regia Digestion | | La, Lanthanum (ppm) | 31.9 | 2.36 | 30.9 | 33 | Aqua Regia Digestion | | Li, Lithium (ppm) | 33.1 | 1.06 | 32.6 | 33.5 | Aqua Regia Digestion | | Mg, Magnesium (wt.%) | 1.22 | 0.055 | 1.2 | 1.25 | Aqua Regia Digestion | | Mn, Manganese (wt.%) | 0.039 | 0.001 | 0.038 | 0.039 | Aqua Regia Digestion | | Mo, Molybdenum (ppm) | 95 | 4.5 | 93 | 97 | Aqua Regia Digestion | | Na, Sodium (wt.%) | 0.202 | 0.017 | 0.194 | 0.21 | Aqua Regia Digestion | | Ni, Nickel (ppm) | 58 | 3 | 57 | 59 | Aqua Regia Digestion | | P, Phosphorus (wt.%) | 0.096 | 0.004 | 0.094 | 0.098 | Aqua Regia Digestion | | Pb, Lead (ppm) | 8.43 | 0.482 | 8.19 | 8.68 | Aqua Regia Digestion | | Pr, Praseodymium (ppm) | 6.88 | 0.599 | 6.26 | 7.5 | Aqua Regia Digestion | | Rb, Rubidium (ppm) | 134 | 6 | 131 | 137 | Aqua Regia Digestion | | S, Sulphur (wt.%) | 0.343 | 0.02 | 0.334 | 0.351 | Aqua Regia Digestion | | Sb, Antimony (ppm) | 1.59 | 0.25 | 1.46 | 1.73 | Aqua Regia Digestion | | Sc, Scandium (ppm) | 7.36 | 0.623 | 7.09 | 7.64 | Aqua Regia Digestion | | Sm, Samarium (ppm) | 4.38 | 0.49 | 3.93 | 4.82 | Aqua Regia Digestion | | Sn, Tin (ppm) | 2.7 | 0.28 | 2.55 | 2.85 | Aqua Regia Digestion | | Sr, Strontium (ppm) | 65 | 9 | 61 | 69 | Aqua Regia Digestion | | Th, Thorium (ppm) | 19.3 | 1.1 | 18.8 | 19.8 | Aqua Regia Digestion | | Ti, Titanium (wt.%) | 0.363 | 0.017 | 0.354 | 0.372 | Aqua Regia Digestion | | Tl, Thallium (ppm) | 0.73 | 0.061 | 0.7 | 0.77 | Aqua Regia Digestion | | U, Uranium (ppm) | 4.87 | 0.261 | 4.77 | 4.98 | Aqua Regia Digestion | | V, Vanadium (ppm) | 110 | 4 | 109 | 112 | Aqua Regia Digestion | | W, Tungsten (ppm) | 2.96 | 0.44 | 2.73 | 3.19 | Aqua Regia Digestion | | Zn, Zinc (ppm) | 74 | 3.8 | 72 | 75 | Aqua Regia Digestion | | Zr, Zirconium (ppm) | 9.34 | 0.577 | 9.03 | 9.66 | Aqua Regia Digestion | | Au, Gold (ppm) | 0.221 | 0.007 | 0.219 | 0.224 | Pb Fire Assay |
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