Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 240
OREAS 240 was prepared from a blend of gold-bearing ore and barren
greenstone. The ore was sourced from the Frogs Leg Gold Mine located 19km west
of Kalgoorlie in Western Australia. The Cambrian greenstone was sourced from a
quarry 145km north of Melbourne, Australia.
Thirty-one commercial analytical
laboratories participated in the program to certify the elements shown below.
The following methods were employed:
- Gold by fire assay (15-40g charge weight) with AAS, ICP-OES or ICP-MS finish (31 laboratories);
- Gold by aqua regia digestion (15-50g sample weight) with ICP-MS, AAS or ICP-OES finish (22 laboratories);
- Gold by cyanide leach (20-200g) via a variety of cyanide leach methods (LeachWELL tablets, alkaline added sodium cyanide solution and sodium cyanide liquor with LeachWELL powder) with ICP or AAS finish (20 laboratories);
- Gold by x-ray photon assay on ~350g sample weights (12 Chrysos PhotonAssay units at 7 laboratories with two rounds of data reported from each unit);
- Full ICP-OES and ICP-MS elemental suites by aqua regia digestion (up to 25 laboratories depending on the element);
- Full ICP-OES and ICP-MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl) digestion (up to 25 laboratories depending on the element).
| Analyte | Certified Value | 1SD | Expanded Uncertainty Low | Expanded Uncertainty High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppm) | 5.51 | 0.139 | 5.46 | 5.56 | Pb Fire Assay |
| Au, Gold (ppm) | 5.28 | 0.246 | 5.17 | 5.39 | Aqua Regia Digestion (sample weights 10-50g) |
| Au, Gold (ppm) | 5.36 | 0.158 | 5.28 | 5.44 | Cyanide Leach |
| Au, Gold (ppm) | 5.47 | 0.110 | 5.43 | 5.50 | PhotonAssay |
| Ag, Silver (ppm) | 1.30 | 0.086 | 1.24 | 1.36 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 3.35 | 0.183 | 3.23 | 3.47 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 64 | 2.7 | 62 | 66 | Aqua Regia Digestion |
| B, Boron (ppm) | 19.8 | 4.6 | 15.6 | 24.0 | Aqua Regia Digestion |
| Ba, Barium (ppm) | 31.8 | 2.58 | 30.1 | 33.4 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.27 | 0.03 | 0.23 | 0.30 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 0.050 | 0.001 | 0.049 | 0.051 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 2.82 | 0.33 | 2.64 | 2.99 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.61 | 0.021 | 0.58 | 0.64 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 10.4 | 0.57 | 10.0 | 10.8 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 28.5 | 1.81 | 27.4 | 29.6 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 20.2 | 1.01 | 19.3 | 21.1 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 0.70 | 0.054 | 0.67 | 0.74 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 167 | 6 | 163 | 171 | Aqua Regia Digestion |
| Dy, Dysprosium (ppm) | 2.08 | 0.26 | 1.84 | 2.32 | Aqua Regia Digestion |
| Er, Erbium (ppm) | 1.18 | 0.14 | 1.01 | 1.35 | Aqua Regia Digestion |
| Eu, Europium (ppm) | 0.41 | 0.06 | 0.34 | 0.47 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 5.30 | 0.232 | 5.15 | 5.45 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 9.68 | 0.821 | 9.16 | 10.20 | Aqua Regia Digestion |
| Gd, Gadolinium (ppm) | 1.91 | 0.23 | 1.66 | 2.16 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.098 | 0.019 | 0.072 | 0.123 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.55 | 0.08 | 0.49 | 0.60 | Aqua Regia Digestion |
| Ho, Holmium (ppm) | 0.39 | 0.030 | 0.35 | 0.44 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.038 | 0.005 | 0.034 | 0.041 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.147 | 0.012 | 0.139 | 0.156 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 4.56 | 0.246 | 4.40 | 4.72 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 9.96 | 0.860 | 9.40 | 10.52 | Aqua Regia Digestion |
| Lu, Lutetium (ppm) | 0.15 | 0.02 | 0.14 | 0.17 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 1.54 | 0.047 | 1.50 | 1.57 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.072 | 0.005 | 0.069 | 0.074 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 1.60 | 0.109 | 1.52 | 1.67 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.269 | 0.016 | 0.257 | 0.281 | Aqua Regia Digestion |
| Nd, Neodymium (ppm) | 6.00 | 0.67 | 5.25 | 6.75 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 53 | 3.8 | 51 | 55 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.039 | 0.002 | 0.037 | 0.040 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 28.0 | 1.61 | 26.8 | 29.3 | Aqua Regia Digestion |
| Pr, Praseodymium (ppm) | 1.36 | 0.129 | 1.22 | 1.50 | Aqua Regia Digestion |
| Pt, Platinum (ppb) | 13.4 | 1.2 | 11.7 | 15.1 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 6.08 | 0.475 | 5.78 | 6.37 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | 0.002 | 0.001 | 0.001 | 0.003 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.400 | 0.031 | 0.383 | 0.417 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 0.77 | 0.25 | 0.63 | 0.90 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 6.16 | 0.563 | 5.80 | 6.53 | Aqua Regia Digestion |
| Sm, Samarium (ppm) | 1.56 | 0.105 | 1.43 | 1.69 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 0.65 | 0.09 | 0.57 | 0.73 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 46.8 | 6.6 | 43.5 | 50.1 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.050 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.31 | 0.03 | 0.28 | 0.34 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 0.11 | 0.01 | 0.09 | 0.12 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 0.89 | 0.041 | 0.84 | 0.94 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.307 | 0.053 | 0.279 | 0.335 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.11 | 0.010 | 0.10 | 0.12 | Aqua Regia Digestion |
| Tm, Thulium (ppm) | 0.17 | 0.014 | 0.15 | 0.19 | Aqua Regia Digestion |
| U, Uranium (ppm) | 0.22 | 0.010 | 0.21 | 0.24 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 130 | 16 | 121 | 138 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 25.9 | 3.9 | 23.8 | 27.9 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 11.4 | 0.99 | 10.8 | 12.1 | Aqua Regia Digestion |
| Yb, Ytterbium (ppm) | 1.11 | 0.16 | 0.97 | 1.26 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 129 | 5 | 126 | 133 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 18.5 | 1.9 | 17.3 | 19.8 | Aqua Regia Digestion |
| Ag, Silver (ppm) | 1.35 | 0.077 | 1.26 | 1.44 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 6.84 | 0.169 | 6.66 | 7.03 | 4-Acid Digestion |
| As, Arsenic (ppm) | 65 | 4.6 | 62 | 69 | 4-Acid Digestion |
| Ba, Barium (ppm) | 129 | 4 | 125 | 134 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 0.43 | 0.038 | 0.39 | 0.48 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.053 | 0.007 | 0.045 | 0.061 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 6.85 | 0.284 | 6.66 | 7.04 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.63 | 0.032 | 0.59 | 0.68 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 13.3 | 0.89 | 12.6 | 14.0 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 39.8 | 2.60 | 38.1 | 41.6 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 103 | 11 | 96 | 109 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 0.97 | 0.071 | 0.90 | 1.04 | 4-Acid Digestion |
| Cu, Copper (ppm) | 168 | 5 | 164 | 173 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 3.51 | 0.174 | 3.34 | 3.67 | 4-Acid Digestion |
| Er, Erbium (ppm) | 2.17 | 0.111 | 2.03 | 2.30 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.88 | 0.045 | 0.82 | 0.95 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 7.31 | 0.243 | 7.15 | 7.47 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 15.2 | 0.51 | 14.6 | 15.8 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.14 | 0.240 | 2.92 | 3.36 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.70 | 0.096 | 1.58 | 1.81 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.74 | 0.052 | 0.70 | 0.79 | 4-Acid Digestion |
| In, Indium (ppm) | 0.075 | 0.005 | 0.070 | 0.080 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.453 | 0.015 | 0.440 | 0.465 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 5.72 | 0.385 | 5.42 | 6.02 | 4-Acid Digestion |
| Li, Lithium (ppm) | 11.4 | 0.92 | 10.7 | 12.1 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.31 | 0.020 | 0.29 | 0.33 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 3.44 | 0.141 | 3.35 | 3.54 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.125 | 0.004 | 0.122 | 0.129 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 1.70 | 0.128 | 1.59 | 1.81 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 1.65 | 0.050 | 1.61 | 1.69 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 3.37 | 0.192 | 3.23 | 3.51 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 8.32 | 0.363 | 7.85 | 8.79 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 79 | 4.0 | 76 | 81 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.040 | 0.002 | 0.039 | 0.042 | 4-Acid Digestion |
| Pb, Lead (ppm) | 28.5 | 1.59 | 27.4 | 29.7 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 1.77 | 0.080 | 1.66 | 1.87 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 14.0 | 0.70 | 13.4 | 14.5 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.399 | 0.017 | 0.384 | 0.414 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 1.48 | 0.087 | 1.36 | 1.60 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 37.9 | 1.35 | 36.7 | 39.1 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 2.43 | 0.134 | 2.32 | 2.53 | 4-Acid Digestion |
| Sn, Tin (ppm) | 1.08 | 0.13 | 0.98 | 1.18 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 213 | 10 | 207 | 219 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.23 | 0.019 | 0.21 | 0.25 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.53 | 0.028 | 0.50 | 0.56 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.11 | 0.01 | 0.09 | 0.13 | 4-Acid Digestion |
| Th, Thorium (ppm) | 1.13 | 0.074 | 1.07 | 1.19 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.572 | 0.022 | 0.556 | 0.587 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.23 | 0.010 | 0.21 | 0.25 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.31 | 0.016 | 0.28 | 0.34 | 4-Acid Digestion |
| U, Uranium (ppm) | 0.33 | 0.04 | 0.31 | 0.34 | 4-Acid Digestion |
| V, Vanadium (ppm) | 251 | 8 | 243 | 259 | 4-Acid Digestion |
| W, Tungsten (ppm) | 36.9 | 2.75 | 35.1 | 38.7 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 19.2 | 0.98 | 18.5 | 20.0 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 2.10 | 0.139 | 1.99 | 2.21 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 142 | 8 | 137 | 147 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 56 | 4.1 | 53 | 59 | 4-Acid Digestion |
Downloads
Certificate DataPack SDS NRAM (367 KB)Specifications
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CRM State:
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Matrix:
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Mineralisation:
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CRM Group(s):