Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 604
OREAS 604 was prepared from gold-silver-copper bearing ore from Evolution Mining’s Mount Carlton Operation in Queensland, Australia and blended with argillic rhyodacite waste rock to achieve the desired grades. The mineralisation assemblage consists of pyrite, enargite/tennantite, tetrahedrite, digenite, covellite, sphalerite, galena, alunite, dickite, kaolinite and vuggy silica, hosted in advanced argillic altered rhyodacite containing sulphur-salts. OREAS 604 is one of a suite of six CRMs ranging in grades from 24ppm Ag, 0.2 ppm Au and 0.05% Cu to 980ppm Ag, 1.7ppm Au and 5.0% Cu.
Twenty eight commercial analytical laboratories participated in the program to certify the elements reported in Table 1 (see certificate). The following methods were employed:
- Gold via 20-40g* fire assay with AAS (20 labs), ICP-OES (4 labs) or gravimetric (3 labs) finish;
- Instrumental neutron activation analysis for Au on 1g subsamples to confirm homogeneity (1 laboratory);
- Gold via 15-40g* aqua regia digestion with ICP-MS (7 labs) or AAS (5 labs) finish;
- 4-Acid digestion for full elemental suite ICP-OES and ICP-MS (up to 21 laboratories depending on the element).
- Aqua regia digestion (see note below) for full elemental suite ICP-OES and ICP-MS (up to 22 laboratories depending on the element).
- Sulphur via Infrared Combustion Analysis (16 labs).
| Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
|---|---|---|---|---|---|
| Ag, Silver (ppm) | 488 | 15 | 481 | 496 | Pb Fire Assay |
| Cu, Copper (wt.%) | 2.16 | 0.049 | 2.15 | 2.18 | 4-Acid Digestion |
| Au, Gold (ppm) | 1.43 | 0.055 | 1.41 | 1.45 | Pb Fire Assay |
| Ag, Silver (ppm) | 491 | 10 | 486 | 495 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 5.82 | 0.236 | 5.69 | 5.94 | 4-Acid Digestion |
| As, Arsenic (ppm) | 972 | 62 | 943 | 1001 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 1.13 | 0.111 | 1.07 | 1.18 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 28.4 | 4.2 | 26.3 | 30.5 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.735 | 0.024 | 0.724 | 0.747 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 14.9 | 1.06 | 14.4 | 15.4 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 38.1 | 4.0 | 34.6 | 41.5 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 42.0 | 2.84 | 40.7 | 43.3 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 33.8 | 3.6 | 32.3 | 35.4 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 3.63 | 0.187 | 3.51 | 3.76 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 1.60 | 0.100 | 1.50 | 1.70 | 4-Acid Digestion |
| Er, Erbium (ppm) | 0.62 | 0.044 | 0.59 | 0.66 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.74 | 0.11 | 0.59 | 0.89 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 3.02 | 0.210 | 2.93 | 3.12 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 26.7 | 2.63 | 25.4 | 28.0 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 2.72 | 0.30 | 2.33 | 3.11 | 4-Acid Digestion |
| Ge, Germanium (ppm) | < 5.00 | IND | IND | IND | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 3.15 | 0.229 | 3.00 | 3.29 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.25 | 0.03 | 0.22 | 0.28 | 4-Acid Digestion |
| In, Indium (ppm) | 3.57 | 0.291 | 3.37 | 3.78 | 4-Acid Digestion |
| K, Potassium (wt.%) | 1.32 | 0.059 | 1.29 | 1.34 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 19.4 | 3.1 | 16.9 | 21.8 | 4-Acid Digestion |
| Li, Lithium (ppm) | 22.6 | 1.85 | 21.5 | 23.8 | 4-Acid Digestion |
| Lu, Lutetium (ppb) | 80.7 | 13.1 | 73.9 | 87.6 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.208 | 0.013 | 0.202 | 0.214 | 4-Acid Digestion |
| Mn, Manganese (ppm) | 244 | 13 | 238 | 250 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 4.11 | 0.58 | 3.86 | 4.36 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 0.836 | 0.034 | 0.820 | 0.852 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 8.82 | 0.700 | 8.33 | 9.32 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 16.5 | 1.08 | 15.4 | 17.6 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 638 | 31 | 624 | 651 | 4-Acid Digestion |
| P, Phosphorus (ppm) | 573 | 47 | 548 | 597 | 4-Acid Digestion |
| Pb, Lead (ppm) | 994 | 69 | 962 | 1027 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 4.55 | 0.358 | 4.16 | 4.93 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 51 | 2.8 | 49 | 53 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 4.59 | 0.201 | 4.49 | 4.69 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 167 | 8 | 163 | 170 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 4.81 | 0.64 | 4.51 | 5.12 | 4-Acid Digestion |
| Se, Selenium (ppm) | 43.9 | 5.5 | 40.1 | 47.6 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 3.08 | 0.190 | 2.88 | 3.28 | 4-Acid Digestion |
| Sn, Tin (ppm) | 3.83 | 0.261 | 3.62 | 4.05 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 398 | 38 | 379 | 417 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | < 1.00 | IND | IND | IND | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.33 | 0.030 | 0.30 | 0.35 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 25.1 | 3.7 | 21.6 | 28.6 | 4-Acid Digestion |
| Th, Thorium (ppm) | 7.47 | 0.90 | 6.80 | 8.14 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.191 | 0.015 | 0.183 | 0.198 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 7.44 | 0.83 | 6.95 | 7.94 | 4-Acid Digestion |
| Tm, Thulium (ppb) | 81.2 | 13.7 | 73.3 | 89.1 | 4-Acid Digestion |
| U, Uranium (ppm) | 3.17 | 0.142 | 3.07 | 3.26 | 4-Acid Digestion |
| V, Vanadium (ppm) | 36.0 | 1.89 | 35.1 | 36.9 | 4-Acid Digestion |
| W, Tungsten (ppm) | 16.7 | 2.9 | 14.9 | 18.5 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 7.16 | 0.295 | 7.00 | 7.33 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 0.56 | 0.037 | 0.53 | 0.59 | 4-Acid Digestion |
| Zn, Zinc (wt.%) | 0.255 | 0.008 | 0.251 | 0.259 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 104 | 7 | 101 | 108 | 4-Acid Digestion |
| Ag, Silver (ppm) | 492 | 15 | 484 | 501 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 0.790 | 0.135 | 0.727 | 0.852 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 966 | 53 | 941 | 991 | Aqua Regia Digestion |
| Au, Gold (ppm) | 1.43 | 0.056 | 1.40 | 1.46 | Aqua Regia Digestion |
| B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.33 | 0.06 | 0.28 | 0.39 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 26.9 | 4.7 | 24.6 | 29.2 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 0.591 | 0.037 | 0.574 | 0.608 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 15.5 | 1.35 | 14.9 | 16.2 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 23.5 | 3.3 | 20.9 | 26.2 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 42.6 | 2.41 | 41.5 | 43.6 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 32.1 | 2.92 | 31.0 | 33.2 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 1.22 | 0.22 | 1.03 | 1.41 | Aqua Regia Digestion |
| Cu, Copper (wt.%) | 2.16 | 0.064 | 2.13 | 2.19 | Aqua Regia Digestion |
| Dy, Dysprosium (ppm) | 0.86 | 0.11 | 0.74 | 0.98 | Aqua Regia Digestion |
| Er, Erbium (ppm) | 0.29 | 0.03 | 0.25 | 0.33 | Aqua Regia Digestion |
| Eu, Europium (ppm) | 0.39 | 0.06 | 0.31 | 0.47 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 2.93 | 0.149 | 2.86 | 2.99 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 6.10 | 0.85 | 5.55 | 6.64 | Aqua Regia Digestion |
| Gd, Gadolinium (ppm) | 1.49 | 0.21 | 1.25 | 1.72 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.58 | 0.11 | 0.49 | 0.67 | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 1.01 | 0.052 | 0.98 | 1.04 | Aqua Regia Digestion |
| Ho, Holmium (ppm) | 0.14 | 0.006 | 0.13 | 0.15 | Aqua Regia Digestion |
| In, Indium (ppm) | 3.66 | 0.40 | 3.34 | 3.98 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.167 | 0.021 | 0.156 | 0.178 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 10.5 | 1.9 | 9.6 | 11.5 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 6.16 | 0.84 | 5.62 | 6.69 | Aqua Regia Digestion |
| Lu, Lutetium (ppb) | 27.3 | 4.3 | 23.3 | 31.4 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 0.106 | 0.014 | 0.100 | 0.113 | Aqua Regia Digestion |
| Mn, Manganese (ppm) | 231 | 8 | 227 | 235 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 4.02 | 0.361 | 3.87 | 4.17 | Aqua Regia Digestion |
| Na, Sodium (ppm) | 461 | 84 | 422 | 501 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.39 | 0.08 | 0.29 | 0.49 | Aqua Regia Digestion |
| Nd, Neodymium (ppm) | 10.6 | 1.4 | 9.0 | 12.2 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 650 | 28 | 637 | 663 | Aqua Regia Digestion |
| P, Phosphorus (ppm) | 248 | 31 | 231 | 265 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 703 | 37 | 687 | 719 | Aqua Regia Digestion |
| Pr, Praseodymium (ppm) | 2.83 | 0.43 | 2.34 | 3.31 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 8.39 | 1.39 | 7.03 | 9.75 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 4.26 | 0.213 | 4.15 | 4.36 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 126 | 22 | 115 | 137 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | < 2.00 | IND | IND | IND | Aqua Regia Digestion |
| Se, Selenium (ppm) | 45.0 | 5.1 | 42.0 | 48.1 | Aqua Regia Digestion |
| Sm, Samarium (ppm) | 1.94 | 0.25 | 1.67 | 2.22 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 2.81 | 0.251 | 2.59 | 3.03 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 37.7 | 6.0 | 34.6 | 40.9 | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.19 | 0.03 | 0.16 | 0.21 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 25.3 | 1.84 | 23.9 | 26.7 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 3.74 | 0.71 | 3.19 | 4.28 | Aqua Regia Digestion |
| Ti, Titanium (ppm) | 97 | 20 | 84 | 110 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 7.27 | 1.16 | 6.58 | 7.95 | Aqua Regia Digestion |
| U, Uranium (ppm) | 1.22 | 0.17 | 1.08 | 1.35 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 10.2 | 1.6 | 9.4 | 10.9 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 3.50 | 0.71 | 2.94 | 4.05 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 3.45 | 0.51 | 3.10 | 3.80 | Aqua Regia Digestion |
| Yb, Ytterbium (ppm) | 0.20 | 0.018 | 0.18 | 0.21 | Aqua Regia Digestion |
| Zn, Zinc (wt.%) | 0.254 | 0.012 | 0.248 | 0.259 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 21.1 | 2.9 | 19.3 | 22.9 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 4.85 | 0.213 | 4.73 | 4.97 | Infrared Combustion |
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):