Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 904 contains 88 certified values and is a medium grade oxide copper ore certified reference material. It is one of a suite of four transitional to oxide copper (-gold) CRMs prepared from samples sourced from CST’s Lady Annie Mine, located 120 kms northwest of Mount Isa, Queensland, Australia. Mineralisation at Lady Annie is hosted in dolomitic, carbonaceous and argillaceous sandstones and siltstones. The primary copper sulphide mineralisation at depth is dominated by chalcocite and chalcopyrite and appears to be structurally controlled, being commonly associated with fault-related silicification.
Nineteen commercial analytical laboratories participated in the program. The following methods were employed:
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
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Cu, Copper (wt.%) | 0.612 | 0.021 | 0.601 | 0.622 | 4-Acid Digestion |
Au, Gold (ppb) | 45 | 4.3 | 43 | 47 | Pb Fire Assay |
Cu-Sol(H2SO4), Copper soluble (sulphuric) (wt.%) | 0.519 | 0.028 | 0.503 | 0.534 | Sulphuric Acid 5% Leach |
Ag, Silver (ppm) | 0.551 | 0.053 | 0.529 | 0.573 | 4-Acid Digestion |
Al, Aluminium (wt.%) | 6.30 | 0.315 | 6.13 | 6.47 | 4-Acid Digestion |
As, Arsenic (ppm) | 98 | 4.9 | 96 | 101 | 4-Acid Digestion |
Ba, Barium (ppm) | 194 | 9 | 190 | 198 | 4-Acid Digestion |
Be, Beryllium (ppm) | 7.86 | 0.768 | 7.46 | 8.25 | 4-Acid Digestion |
Bi, Bismuth (ppm) | 4.05 | 0.174 | 3.97 | 4.14 | 4-Acid Digestion |
Ca, Calcium (wt.%) | 0.046 | 0.005 | 0.044 | 0.048 | 4-Acid Digestion |
Ce, Cerium (ppm) | 86 | 8.5 | 82 | 90 | 4-Acid Digestion |
Co, Cobalt (ppm) | 83 | 7.0 | 80 | 87 | 4-Acid Digestion |
Cr, Chromium (ppm) | 54 | 3.8 | 52 | 56 | 4-Acid Digestion |
Cs, Caesium (ppm) | 3.79 | 0.181 | 3.68 | 3.89 | 4-Acid Digestion |
Fe, Iron (wt.%) | 6.68 | 0.291 | 6.53 | 6.83 | 4-Acid Digestion |
Ga, Gallium (ppm) | 16.7 | 0.85 | 16.3 | 17.1 | 4-Acid Digestion |
Ge, Germanium (ppm) | 0.18 | 0.03 | 0.14 | 0.23 | 4-Acid Digestion |
Hf, Hafnium (ppm) | 4.99 | 0.352 | 4.78 | 5.20 | 4-Acid Digestion |
In, Indium (ppm) | 0.22 | 0.017 | 0.21 | 0.23 | 4-Acid Digestion |
K, Potassium (wt.%) | 3.31 | 0.184 | 3.21 | 3.42 | 4-Acid Digestion |
La, Lanthanum (ppm) | 43.2 | 2.90 | 41.6 | 44.9 | 4-Acid Digestion |
Li, Lithium (ppm) | 16.7 | 0.66 | 16.4 | 17.0 | 4-Acid Digestion |
Lu, Lutetium (ppm) | 0.47 | 0.025 | 0.44 | 0.49 | 4-Acid Digestion |
Mg, Magnesium (wt.%) | 0.556 | 0.034 | 0.538 | 0.574 | 4-Acid Digestion |
Mn, Manganese (wt.%) | 0.041 | 0.002 | 0.040 | 0.042 | 4-Acid Digestion |
Mo, Molybdenum (ppm) | 2.12 | 0.184 | 2.04 | 2.21 | 4-Acid Digestion |
Na, Sodium (wt.%) | 0.034 | 0.004 | 0.032 | 0.036 | 4-Acid Digestion |
Ni, Nickel (ppm) | 40.1 | 1.83 | 39.3 | 41.0 | 4-Acid Digestion |
P, Phosphorus (wt.%) | 0.098 | 0.008 | 0.093 | 0.102 | 4-Acid Digestion |
Pb, Lead (ppm) | 10.6 | 1.2 | 9.9 | 11.2 | 4-Acid Digestion |
Rb, Rubidium (ppm) | 130 | 20 | 118 | 141 | 4-Acid Digestion |
S, Sulphur (wt.%) | 0.063 | 0.005 | 0.060 | 0.065 | 4-Acid Digestion |
Sb, Antimony (ppm) | 1.48 | 0.106 | 1.42 | 1.54 | 4-Acid Digestion |
Sc, Scandium (ppm) | 11.2 | 0.81 | 10.8 | 11.6 | 4-Acid Digestion |
Se, Selenium (ppm) | 3.30 | 0.60 | 2.94 | 3.66 | 4-Acid Digestion |
Sn, Tin (ppm) | 2.83 | 0.174 | 2.73 | 2.93 | 4-Acid Digestion |
Sr, Strontium (ppm) | 27.2 | 1.88 | 26.2 | 28.1 | 4-Acid Digestion |
Ta, Tantalum (ppm) | 0.54 | 0.09 | 0.48 | 0.61 | 4-Acid Digestion |
Tb, Terbium (ppm) | 1.00 | 0.11 | 0.91 | 1.09 | 4-Acid Digestion |
Th, Thorium (ppm) | 14.3 | 1.5 | 13.5 | 15.1 | 4-Acid Digestion |
Tl, Thallium (ppm) | 0.52 | 0.026 | 0.50 | 0.53 | 4-Acid Digestion |
U, Uranium (ppm) | 8.43 | 0.721 | 8.03 | 8.82 | 4-Acid Digestion |
V, Vanadium (ppm) | 76 | 3.0 | 74 | 77 | 4-Acid Digestion |
W, Tungsten (ppm) | 2.12 | 0.36 | 1.92 | 2.32 | 4-Acid Digestion |
Y, Yttrium (ppm) | 31.5 | 3.4 | 29.8 | 33.2 | 4-Acid Digestion |
Yb, Ytterbium (ppm) | 3.14 | 0.229 | 2.98 | 3.30 | 4-Acid Digestion |
Zn, Zinc (ppm) | 26.3 | 3.5 | 24.5 | 28.1 | 4-Acid Digestion |
Zr, Zirconium (ppm) | 171 | 9 | 166 | 176 | 4-Acid Digestion |
Ag, Silver (ppm) | 0.366 | 0.035 | 0.350 | 0.382 | Aqua Regia Digestion |
Al, Aluminium (wt.%) | 1.25 | 0.105 | 1.19 | 1.31 | Aqua Regia Digestion |
As, Arsenic (ppm) | 91 | 5.3 | 89 | 94 | Aqua Regia Digestion |
Ba, Barium (ppm) | 68 | 5.5 | 65 | 71 | Aqua Regia Digestion |
Be, Beryllium (ppm) | 6.54 | 0.362 | 6.34 | 6.73 | Aqua Regia Digestion |
Bi, Bismuth (ppm) | 3.74 | 0.370 | 3.56 | 3.92 | Aqua Regia Digestion |
Ca, Calcium (wt.%) | 0.040 | 0.002 | 0.040 | 0.041 | Aqua Regia Digestion |
Cd, Cadmium (ppm) | 0.058 | 0.008 | 0.053 | 0.063 | Aqua Regia Digestion |
Ce, Cerium (ppm) | 70 | 4.9 | 67 | 73 | Aqua Regia Digestion |
Co, Cobalt (ppm) | 82 | 4.8 | 80 | 85 | Aqua Regia Digestion |
Cr, Chromium (ppm) | 17.5 | 2.5 | 16.1 | 18.9 | Aqua Regia Digestion |
Cs, Caesium (ppm) | 0.62 | 0.061 | 0.58 | 0.66 | Aqua Regia Digestion |
Cu, Copper (wt.%) | 0.630 | 0.018 | 0.622 | 0.639 | Aqua Regia Digestion |
Fe, Iron (wt.%) | 6.40 | 0.418 | 6.18 | 6.62 | Aqua Regia Digestion |
Ga, Gallium (ppm) | 3.40 | 0.47 | 3.12 | 3.69 | Aqua Regia Digestion |
In, Indium (ppm) | 0.17 | 0.016 | 0.16 | 0.18 | Aqua Regia Digestion |
K, Potassium (wt.%) | 0.603 | 0.054 | 0.571 | 0.635 | Aqua Regia Digestion |
La, Lanthanum (ppm) | 33.9 | 2.64 | 32.5 | 35.3 | Aqua Regia Digestion |
Lu, Lutetium (ppm) | 0.21 | 0.02 | 0.18 | 0.23 | Aqua Regia Digestion |
Mg, Magnesium (wt.%) | 0.143 | 0.019 | 0.132 | 0.153 | Aqua Regia Digestion |
Mn, Manganese (wt.%) | 0.041 | 0.003 | 0.040 | 0.042 | Aqua Regia Digestion |
Mo, Molybdenum (ppm) | 2.02 | 0.23 | 1.88 | 2.15 | Aqua Regia Digestion |
Ni, Nickel (ppm) | 36.6 | 1.57 | 35.8 | 37.4 | Aqua Regia Digestion |
P, Phosphorus (wt.%) | 0.095 | 0.004 | 0.093 | 0.097 | Aqua Regia Digestion |
Pb, Lead (ppm) | 8.49 | 0.94 | 7.98 | 9.00 | Aqua Regia Digestion |
Rb, Rubidium (ppm) | 22.4 | 1.44 | 21.5 | 23.4 | Aqua Regia Digestion |
S, Sulphur (wt.%) | 0.034 | 0.007 | 0.030 | 0.037 | Aqua Regia Digestion |
Sb, Antimony (ppm) | 0.78 | 0.11 | 0.72 | 0.84 | Aqua Regia Digestion |
Sc, Scandium (ppm) | 3.83 | 0.52 | 3.53 | 4.13 | Aqua Regia Digestion |
Se, Selenium (ppm) | 2.81 | 0.29 | 2.73 | 2.90 | Aqua Regia Digestion |
Sn, Tin (ppm) | 0.58 | 0.11 | 0.51 | 0.66 | Aqua Regia Digestion |
Sr, Strontium (ppm) | 16.5 | 0.92 | 16.0 | 17.0 | Aqua Regia Digestion |
Tb, Terbium (ppm) | 0.70 | 0.027 | 0.67 | 0.73 | Aqua Regia Digestion |
Th, Thorium (ppm) | 7.56 | 0.696 | 7.16 | 7.96 | Aqua Regia Digestion |
Tl, Thallium (ppm) | 0.15 | 0.02 | 0.14 | 0.16 | Aqua Regia Digestion |
U, Uranium (ppm) | 5.20 | 0.54 | 4.89 | 5.50 | Aqua Regia Digestion |
V, Vanadium (ppm) | 21.7 | 0.89 | 21.3 | 22.2 | Aqua Regia Digestion |
Y, Yttrium (ppm) | 17.2 | 1.24 | 16.4 | 17.9 | Aqua Regia Digestion |
Yb, Ytterbium (ppm) | 1.41 | 0.084 | 1.33 | 1.50 | Aqua Regia Digestion |
Zn, Zinc (ppm) | 22.4 | 2.05 | 21.4 | 23.3 | Aqua Regia Digestion |
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