| Description: OREAS 504c 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. Twenty seven commercial analytical laboratories participated in the program to certify the elements reported in Table 1. The following methods were employed: - Gold via 15-50g fire assay with AAS finish (14 laboratories) and ICP-OES (12 laboratories) finish;
- Gold via 15-50g aqua regia digestion with ICP-MS finish (11 laboratories), AAS (4 laboratories) and ICP-OES (1 laboratory) finish;
- Aqua regia digestion for full elemental suite ICP-OES/MS and AAS finish (up to 26 laboratories depending on the element);
- 4-Acid digestion for full elemental suite ICP-OES/MS finish (up to 25 laboratories depending on the element);
- Gold by instrumental neutron activation analysis (INAA) on 20 x 85mg subsamples to confirm homogeneity (1 laboratory only: ANSTO, Lucas Heights, Australia);
- Major and trace elements determined by borate fusion XRF (Al2O3 to TiO2), laser ablation with ICP-MS (Ag to Zr), LOI at 1000°C and C+S by infrared combustion furnace (1 laboratory only: Bureau Veritas Geoanalytical, Perth, Australia).
Download Certificate OREAS504c Download DataPack OREAS504c | Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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| Ag, Silver (ppm) | 4.22 | 0.288 | 4.1 | 4.34 | 4-Acid Digestion | | Al, Aluminium (wt.%) | 7.07 | 0.22 | 6.99 | 7.15 | 4-Acid Digestion | | As, Arsenic (ppm) | 34.9 | 2.92 | 33.9 | 35.9 | 4-Acid Digestion | | Ba, Barium (ppm) | 850 | 25 | 840 | 860 | 4-Acid Digestion | | Be, Beryllium (ppm) | 2.31 | 0.196 | 2.22 | 2.4 | 4-Acid Digestion | | Bi, Bismuth (ppm) | 2.26 | 0.106 | 2.2 | 2.31 | 4-Acid Digestion | | Ca, Calcium (wt.%) | 2.52 | 0.112 | 2.47 | 2.56 | 4-Acid Digestion | | Ce, Cerium (ppm) | 49.8 | 4.55 | 47.7 | 51.9 | 4-Acid Digestion | | Co, Cobalt (ppm) | 16.2 | 0.94 | 15.7 | 16.6 | 4-Acid Digestion | | Cr, Chromium (ppm) | 58 | 5.1 | 56 | 60 | 4-Acid Digestion | | Cs, Caesium (ppm) | 8.16 | 0.351 | 7.99 | 8.34 | 4-Acid Digestion | | Cu, Copper (wt.%) | 1.11 | 0.03 | 1.1 | 1.12 | 4-Acid Digestion | | Dy, Dysprosium (ppm) | 3.76 | 0.146 | 3.68 | 3.84 | 4-Acid Digestion | | Er, Erbium (ppm) | 2.11 | 0.144 | 1.99 | 2.23 | 4-Acid Digestion | | Eu, Europium (ppm) | 1.03 | 0.13 | 0.91 | 1.15 | 4-Acid Digestion | | Fe, Iron (wt.%) | 6.08 | 0.191 | 6.01 | 6.16 | 4-Acid Digestion | | Ga, Gallium (ppm) | 17.2 | 0.88 | 16.8 | 17.6 | 4-Acid Digestion | | Gd, Gadolinium (ppm) | 4.14 | 0.2 | 3.99 | 4.3 | 4-Acid Digestion | | Hf, Hafnium (ppm) | 2.21 | 0.156 | 2.14 | 2.27 | 4-Acid Digestion | | Ho, Holmium (ppm) | 0.75 | 0.05 | 0.71 | 0.79 | 4-Acid Digestion | | In, Indium (ppm) | 0.24 | 0.016 | 0.24 | 0.25 | 4-Acid Digestion | | K, Potassium (wt.%) | 3.16 | 0.106 | 3.12 | 3.2 | 4-Acid Digestion | | La, Lanthanum (ppm) | 25.5 | 1.39 | 24.9 | 26.1 | 4-Acid Digestion | | Li, Lithium (ppm) | 25.9 | 1.42 | 25.3 | 26.6 | 4-Acid Digestion | | Lu, Lutetium (ppm) | 0.3 | 0.016 | 0.28 | 0.31 | 4-Acid Digestion | | Mg, Magnesium (wt.%) | 1.43 | 0.054 | 1.41 | 1.45 | 4-Acid Digestion | | Mn, Manganese (wt.%) | 0.051 | 0.002 | 0.05 | 0.051 | 4-Acid Digestion | | Mo, Molybdenum (ppm) | 512 | 13 | 507 | 518 | 4-Acid Digestion | | Na, Sodium (wt.%) | 2.04 | 0.053 | 2.02 | 2.06 | 4-Acid Digestion | | Nb, Niobium (ppm) | 14.2 | 0.6 | 13.9 | 14.5 | 4-Acid Digestion | | Nd, Neodymium (ppm) | 22.4 | 1.19 | 21.7 | 23 | 4-Acid Digestion | | Ni, Nickel (ppm) | 43.2 | 2.4 | 42.3 | 44.2 | 4-Acid Digestion | | P, Phosphorus (wt.%) | 0.094 | 0.003 | 0.093 | 0.096 | 4-Acid Digestion | | Pb, Lead (ppm) | 60 | 3.1 | 59 | 61 | 4-Acid Digestion | | Pr, Praseodymium (ppm) | 5.96 | 0.487 | 5.55 | 6.37 | 4-Acid Digestion | | Rb, Rubidium (ppm) | 142 | 5 | 140 | 144 | 4-Acid Digestion | | Re, Rhenium (ppb) | 353 | 25 | 340 | 366 | 4-Acid Digestion | | S, Sulphur (wt.%) | 1.11 | 0.036 | 1.1 | 1.13 | 4-Acid Digestion | | Sb, Antimony (ppm) | 1.62 | 0.088 | 1.57 | 1.66 | 4-Acid Digestion | | Sc, Scandium (ppm) | 12.6 | 0.67 | 12.3 | 12.9 | 4-Acid Digestion | | Se, Selenium (ppm) | 7.39 | 0.99 | 7.12 | 7.67 | 4-Acid Digestion | | Sm, Samarium (ppm) | 4.5 | 0.259 | 4.33 | 4.67 | 4-Acid Digestion | | Sn, Tin (ppm) | 5.42 | 0.215 | 5.33 | 5.52 | 4-Acid Digestion | | Sr, Strontium (ppm) | 360 | 16 | 353 | 366 | 4-Acid Digestion | | Ta, Tantalum (ppm) | 1.06 | 0.066 | 1.02 | 1.11 | 4-Acid Digestion | | Tb, Terbium (ppm) | 0.64 | 0.013 | 0.63 | 0.65 | 4-Acid Digestion | | Te, Tellurium (ppm) | 0.47 | 0.05 | 0.44 | 0.5 | 4-Acid Digestion | | Th, Thorium (ppm) | 12.6 | 0.67 | 12.3 | 12.9 | 4-Acid Digestion | | Ti, Titanium (wt.%) | 0.403 | 0.015 | 0.397 | 0.409 | 4-Acid Digestion | | Tl, Thallium (ppm) | 0.7 | 0.028 | 0.69 | 0.71 | 4-Acid Digestion | | Tm, Thulium (ppm) | 0.31 | 0.02 | 0.29 | 0.33 | 4-Acid Digestion | | U, Uranium (ppm) | 3.64 | 0.173 | 3.58 | 3.69 | 4-Acid Digestion | | V, Vanadium (ppm) | 122 | 6 | 120 | 125 | 4-Acid Digestion | | W, Tungsten (ppm) | 2.95 | 0.219 | 2.88 | 3.02 | 4-Acid Digestion | | Y, Yttrium (ppm) | 20.3 | 0.77 | 20 | 20.6 | 4-Acid Digestion | | Yb, Ytterbium (ppm) | 2 | 0.17 | 1.89 | 2.12 | 4-Acid Digestion | | Zn, Zinc (ppm) | 106 | 4 | 104 | 108 | 4-Acid Digestion | | Zr, Zirconium (ppm) | 72 | 5.5 | 69 | 74 | 4-Acid Digestion | | Ag, Silver (ppm) | 4.19 | 0.306 | 4.06 | 4.32 | Aqua Regia Digestion | | Al, Aluminium (wt.%) | 1.86 | 0.053 | 1.84 | 1.89 | Aqua Regia Digestion | | As, Arsenic (ppm) | 34.5 | 2.57 | 33.6 | 35.4 | Aqua Regia Digestion | | Ba, Barium (ppm) | 271 | 21 | 261 | 280 | Aqua Regia Digestion | | Be, Beryllium (ppm) | 0.53 | 0.07 | 0.48 | 0.58 | Aqua Regia Digestion | | Bi, Bismuth (ppm) | 2.28 | 0.148 | 2.21 | 2.35 | Aqua Regia Digestion | | Ca, Calcium (wt.%) | 1.31 | 0.075 | 1.28 | 1.34 | Aqua Regia Digestion | | Ce, Cerium (ppm) | 44.1 | 3.75 | 42.3 | 45.9 | Aqua Regia Digestion | | Co, Cobalt (ppm) | 14.9 | 0.87 | 14.5 | 15.3 | Aqua Regia Digestion | | Cr, Chromium (ppm) | 56 | 4 | 55 | 58 | Aqua Regia Digestion | | Cs, Caesium (ppm) | 6.93 | 0.392 | 6.73 | 7.13 | Aqua Regia Digestion | | Cu, Copper (wt.%) | 1.1 | 0.019 | 1.09 | 1.11 | Aqua Regia Digestion | | Dy, Dysprosium (ppm) | 2.67 | 0.133 | 2.55 | 2.79 | Aqua Regia Digestion | | Er, Erbium (ppm) | 1.48 | 0.043 | 1.44 | 1.52 | Aqua Regia Digestion | | Eu, Europium (ppm) | 0.41 | 0.07 | 0.35 | 0.48 | Aqua Regia Digestion | | Fe, Iron (wt.%) | 5.75 | 0.261 | 5.64 | 5.85 | Aqua Regia Digestion | | Ga, Gallium (ppm) | 8.42 | 0.579 | 8.1 | 8.73 | Aqua Regia Digestion | | Gd, Gadolinium (ppm) | 3.1 | 0.301 | 2.85 | 3.36 | Aqua Regia Digestion | | Ge, Germanium (ppm) | 0.16 | 0.03 | 0.13 | 0.2 | Aqua Regia Digestion | | Hf, Hafnium (ppm) | 0.47 | 0.031 | 0.45 | 0.48 | Aqua Regia Digestion | | Hg, Mercury (ppm) | 0.064 | 0.011 | 0.058 | 0.07 | Aqua Regia Digestion | | Ho, Holmium (ppm) | 0.48 | 0.043 | 0.45 | 0.52 | Aqua Regia Digestion | | In, Indium (ppm) | 0.22 | 0.009 | 0.22 | 0.22 | Aqua Regia Digestion | | K, Potassium (wt.%) | 0.809 | 0.032 | 0.796 | 0.823 | Aqua Regia Digestion | | La, Lanthanum (ppm) | 22 | 1.83 | 21.3 | 22.8 | Aqua Regia Digestion | | Li, Lithium (ppm) | 23.6 | 2.8 | 22.4 | 24.9 | Aqua Regia Digestion | | Lu, Lutetium (ppm) | 0.18 | 0.013 | 0.18 | 0.19 | Aqua Regia Digestion | | Mg, Magnesium (wt.%) | 1.15 | 0.034 | 1.13 | 1.16 | Aqua Regia Digestion | | Mn, Manganese (wt.%) | 0.038 | 0.001 | 0.037 | 0.039 | Aqua Regia Digestion | | Mo, Molybdenum (ppm) | 505 | 18 | 498 | 512 | Aqua Regia Digestion | | Na, Sodium (wt.%) | 0.184 | 0.02 | 0.174 | 0.193 | Aqua Regia Digestion | | Nb, Niobium (ppm) | 1.07 | 0.2 | 0.95 | 1.19 | Aqua Regia Digestion | | Nd, Neodymium (ppm) | 19 | 0.57 | 18.5 | 19.4 | Aqua Regia Digestion | | Ni, Nickel (ppm) | 41.3 | 1.55 | 40.7 | 41.9 | Aqua Regia Digestion | | P, Phosphorus (wt.%) | 0.091 | 0.004 | 0.089 | 0.093 | Aqua Regia Digestion | | Pb, Lead (ppm) | 51 | 1.7 | 50 | 51 | Aqua Regia Digestion | | Pr, Praseodymium (ppm) | 5.06 | 0.155 | 4.94 | 5.18 | Aqua Regia Digestion | | Rb, Rubidium (ppm) | 87 | 4.1 | 85 | 89 | Aqua Regia Digestion | | Re, Rhenium (ppb) | 351 | 27 | 335 | 367 | Aqua Regia Digestion | | S, Sulphur (wt.%) | 1.1 | 0.059 | 1.08 | 1.12 | Aqua Regia Digestion | | Sb, Antimony (ppm) | 1.02 | 0.12 | 0.96 | 1.08 | Aqua Regia Digestion | | Sc, Scandium (ppm) | 7.12 | 0.559 | 6.84 | 7.4 | Aqua Regia Digestion | | Se, Selenium (ppm) | 7 | 0.91 | 6.57 | 7.43 | Aqua Regia Digestion | | Sm, Samarium (ppm) | 3.49 | 0.2 | 3.33 | 3.64 | Aqua Regia Digestion | | Sn, Tin (ppm) | 4.54 | 0.257 | 4.4 | 4.68 | Aqua Regia Digestion | | Sr, Strontium (ppm) | 92 | 10 | 88 | 97 | Aqua Regia Digestion | | Tb, Terbium (ppm) | 0.46 | 0.038 | 0.43 | 0.48 | Aqua Regia Digestion | | Te, Tellurium (ppm) | 0.45 | 0.033 | 0.43 | 0.46 | Aqua Regia Digestion | | Th, Thorium (ppm) | 12.3 | 0.65 | 12 | 12.6 | Aqua Regia Digestion | | Ti, Titanium (wt.%) | 0.267 | 0.014 | 0.261 | 0.274 | Aqua Regia Digestion | | Tl, Thallium (ppm) | 0.47 | 0.05 | 0.45 | 0.49 | Aqua Regia Digestion | | Tm, Thulium (ppm) | 0.2 | 0.007 | 0.19 | 0.2 | Aqua Regia Digestion | | U, Uranium (ppm) | 3.32 | 0.242 | 3.22 | 3.43 | Aqua Regia Digestion | | V, Vanadium (ppm) | 108 | 5 | 105 | 110 | Aqua Regia Digestion | | W, Tungsten (ppm) | 1.7 | 0.23 | 1.59 | 1.82 | Aqua Regia Digestion | | Y, Yttrium (ppm) | 14.2 | 0.93 | 13.7 | 14.6 | Aqua Regia Digestion | | Yb, Ytterbium (ppm) | 1.26 | 0.06 | 1.21 | 1.31 | Aqua Regia Digestion | | Zn, Zinc (ppm) | 95 | 6.3 | 93 | 98 | Aqua Regia Digestion | | Zr, Zirconium (ppm) | 12.1 | 1.1 | 11.5 | 12.7 | Aqua Regia Digestion | | Au, Gold (ppm) | 1.46 | 0.058 | 1.43 | 1.5 | Aqua Regia Digestion (sample weights 10-50g) | | Au, Gold (ppm) | 1.48 | 0.045 | 1.47 | 1.5 | Pb Fire Assay |
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