Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 268 was prepared from a blend of high-grade oxide gold ore and barren materials (basaltic scoria and oxidised siliciclastic sediments). The scoria and sediments were sourced from quarries located in New South Wales and Victoria in Australia. The gold ore was sourced from the Agate Creek Gold Project located in the Etheridge Goldfield of northern Queensland, Australia. The project is hosted within a metamorphosed turbidite sequence of interbedded sandstones, siltstones and shales. Epithermal and mesothermal gold mineralisation occurs within quartz veining, stockworks and breccias associated with Permian felsic volcanic units and Proterozoic batholith. Thirty-one commercial analytical laboratories participated in the program to certify the elements reported below.
To confirm homogeneity, gold by instrumental neutron activation analysis (INAA) was undertaken on 20 x 85mg subsamples (see Table 6 in the ‘Homogeneity Evaluation’ section of the Certificate).
Analyte | Certified Value | 1SD | Expanded Uncertainty Low | Expanded Uncertainty High | Method |
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Au, Gold (ppm) | 11.42 | 0.332 | 11.28 | 11.56 | Pb Fire Assay |
Au, Gold (ppm) | 11.67 | 0.214 | 11.58 | 11.76 | PhotonAssay |
Au, Gold (ppm) | 11.29 | 0.519 | 11.07 | 11.51 | Aqua Regia Digestion (sample weights 10-50g) |
Au, Gold (ppm) | 11.17 | 0.277 | 11.05 | 11.29 | Cyanide Leach |
Ag, Silver (ppm) | 4.86 | 0.211 | 4.62 | 5.09 | 4-Acid Digestion |
Al, Aluminium (wt.%) | 5.18 | 0.162 | 5.05 | 5.31 | 4-Acid Digestion |
As, Arsenic (ppm) | 134 | 4 | 130 | 139 | 4-Acid Digestion |
Ba, Barium (ppm) | 385 | 12 | 374 | 397 | 4-Acid Digestion |
Be, Beryllium (ppm) | 1.92 | 0.135 | 1.77 | 2.07 | 4-Acid Digestion |
Bi, Bismuth (ppm) | 5.31 | 0.385 | 4.86 | 5.75 | 4-Acid Digestion |
Ca, Calcium (wt.%) | 1.18 | 0.046 | 1.14 | 1.22 | 4-Acid Digestion |
Cd, Cadmium (ppm) | 0.041 | 0.014 | 0.025 | 0.056 | 4-Acid Digestion |
Ce, Cerium (ppm) | 61 | 2.6 | 59 | 64 | 4-Acid Digestion |
Co, Cobalt (ppm) | 11.1 | 0.43 | 10.5 | 11.7 | 4-Acid Digestion |
Cr, Chromium (ppm) | 94 | 7.9 | 87 | 100 | 4-Acid Digestion |
Cs, Caesium (ppm) | 6.05 | 0.270 | 5.79 | 6.32 | 4-Acid Digestion |
Cu, Copper (ppm) | 27.1 | 1.22 | 25.7 | 28.5 | 4-Acid Digestion |
Dy, Dysprosium (ppm) | 3.14 | 0.147 | 2.95 | 3.34 | 4-Acid Digestion |
Er, Erbium (ppm) | 1.52 | 0.129 | 1.39 | 1.65 | 4-Acid Digestion |
Eu, Europium (ppm) | 1.03 | 0.074 | 0.94 | 1.12 | 4-Acid Digestion |
Fe, Iron (wt.%) | 2.95 | 0.088 | 2.86 | 3.05 | 4-Acid Digestion |
Ga, Gallium (ppm) | 15.0 | 0.62 | 14.3 | 15.6 | 4-Acid Digestion |
Gd, Gadolinium (ppm) | 4.15 | 0.156 | 3.82 | 4.48 | 4-Acid Digestion |
Ge, Germanium (ppm) | 0.15 | 0.05 | 0.10 | 0.21 | 4-Acid Digestion |
Hf, Hafnium (ppm) | 3.11 | 0.141 | 2.93 | 3.29 | 4-Acid Digestion |
Ho, Holmium (ppm) | 0.56 | 0.040 | 0.48 | 0.63 | 4-Acid Digestion |
In, Indium (ppm) | 0.063 | 0.005 | 0.054 | 0.072 | 4-Acid Digestion |
K, Potassium (wt.%) | 1.30 | 0.057 | 1.26 | 1.34 | 4-Acid Digestion |
La, Lanthanum (ppm) | 31.3 | 1.50 | 29.8 | 32.8 | 4-Acid Digestion |
Li, Lithium (ppm) | 56 | 3.1 | 54 | 59 | 4-Acid Digestion |
Lu, Lutetium (ppm) | 0.21 | 0.016 | 0.19 | 0.24 | 4-Acid Digestion |
Mg, Magnesium (wt.%) | 0.990 | 0.052 | 0.958 | 1.022 | 4-Acid Digestion |
Mn, Manganese (wt.%) | 0.028 | 0.001 | 0.027 | 0.029 | 4-Acid Digestion |
Mo, Molybdenum (ppm) | 7.19 | 0.436 | 6.74 | 7.65 | 4-Acid Digestion |
Na, Sodium (wt.%) | 0.543 | 0.020 | 0.524 | 0.562 | 4-Acid Digestion |
Nb, Niobium (ppm) | 15.2 | 1.14 | 14.2 | 16.2 | 4-Acid Digestion |
Nd, Neodymium (ppm) | 27.0 | 0.84 | 25.5 | 28.4 | 4-Acid Digestion |
Ni, Nickel (ppm) | 50 | 2.3 | 48 | 52 | 4-Acid Digestion |
P, Phosphorus (wt.%) | 0.053 | 0.002 | 0.052 | 0.055 | 4-Acid Digestion |
Pb, Lead (ppm) | 15.5 | 1.12 | 14.4 | 16.6 | 4-Acid Digestion |
Pr, Praseodymium (ppm) | 7.22 | 0.229 | 6.85 | 7.60 | 4-Acid Digestion |
Rb, Rubidium (ppm) | 77 | 3.3 | 74 | 80 | 4-Acid Digestion |
Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
S, Sulphur (wt.%) | 0.028 | 0.004 | 0.022 | 0.034 | 4-Acid Digestion |
Sb, Antimony (ppm) | 4.83 | 0.244 | 4.61 | 5.06 | 4-Acid Digestion |
Sc, Scandium (ppm) | 9.23 | 0.467 | 8.76 | 9.70 | 4-Acid Digestion |
Se, Selenium (ppm) | 0.95 | 0.21 | 0.61 | 1.28 | 4-Acid Digestion |
Sm, Samarium (ppm) | 5.12 | 0.148 | 4.82 | 5.41 | 4-Acid Digestion |
Sn, Tin (ppm) | 6.51 | 0.409 | 6.09 | 6.93 | 4-Acid Digestion |
Sr, Strontium (ppm) | 170 | 4 | 166 | 175 | 4-Acid Digestion |
Ta, Tantalum (ppm) | 1.04 | 0.092 | 0.95 | 1.12 | 4-Acid Digestion |
Tb, Terbium (ppm) | 0.54 | 0.036 | 0.51 | 0.57 | 4-Acid Digestion |
Te, Tellurium (ppm) | 0.12 | 0.03 | 0.07 | 0.18 | 4-Acid Digestion |
Th, Thorium (ppm) | 9.36 | 0.489 | 8.88 | 9.84 | 4-Acid Digestion |
Ti, Titanium (wt.%) | 0.393 | 0.017 | 0.376 | 0.410 | 4-Acid Digestion |
Tl, Thallium (ppm) | 0.46 | 0.028 | 0.44 | 0.48 | 4-Acid Digestion |
Tm, Thulium (ppm) | 0.20 | 0.010 | 0.19 | 0.21 | 4-Acid Digestion |
U, Uranium (ppm) | 1.82 | 0.086 | 1.72 | 1.93 | 4-Acid Digestion |
V, Vanadium (ppm) | 69 | 2.2 | 66 | 72 | 4-Acid Digestion |
W, Tungsten (ppm) | 25.2 | 1.26 | 23.4 | 27.0 | 4-Acid Digestion |
Y, Yttrium (ppm) | 13.7 | 0.91 | 12.9 | 14.5 | 4-Acid Digestion |
Yb, Ytterbium (ppm) | 1.36 | 0.100 | 1.24 | 1.49 | 4-Acid Digestion |
Zn, Zinc (ppm) | 47.8 | 2.37 | 45.7 | 49.9 | 4-Acid Digestion |
Zr, Zirconium (ppm) | 113 | 6 | 108 | 118 | 4-Acid Digestion |
Ag, Silver (ppm) | 4.65 | 0.132 | 4.48 | 4.81 | Aqua Regia Digestion |
Al, Aluminium (wt.%) | 0.918 | 0.067 | 0.874 | 0.961 | Aqua Regia Digestion |
As, Arsenic (ppm) | 116 | 4 | 111 | 120 | Aqua Regia Digestion |
B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
Ba, Barium (ppm) | 79 | 7.4 | 74 | 84 | Aqua Regia Digestion |
Be, Beryllium (ppm) | 0.56 | 0.032 | 0.53 | 0.60 | Aqua Regia Digestion |
Bi, Bismuth (ppm) | 4.70 | 0.327 | 4.36 | 5.04 | Aqua Regia Digestion |
Ca, Calcium (wt.%) | 0.332 | 0.025 | 0.315 | 0.350 | Aqua Regia Digestion |
Cd, Cadmium (ppm) | 0.031 | 0.007 | 0.017 | 0.046 | Aqua Regia Digestion |
Ce, Cerium (ppm) | 35.2 | 3.20 | 32.9 | 37.5 | Aqua Regia Digestion |
Co, Cobalt (ppm) | 7.22 | 0.79 | 6.70 | 7.73 | Aqua Regia Digestion |
Cr, Chromium (ppm) | 43.7 | 2.21 | 42.0 | 45.4 | Aqua Regia Digestion |
Cs, Caesium (ppm) | 1.39 | 0.18 | 1.25 | 1.53 | Aqua Regia Digestion |
Cu, Copper (ppm) | 22.8 | 1.38 | 21.5 | 24.0 | Aqua Regia Digestion |
Eu, Europium (ppm) | 0.53 | 0.10 | 0.38 | 0.69 | Aqua Regia Digestion |
Fe, Iron (wt.%) | 2.14 | 0.148 | 2.03 | 2.24 | Aqua Regia Digestion |
Ga, Gallium (ppm) | 3.64 | 0.256 | 3.41 | 3.86 | Aqua Regia Digestion |
Ge, Germanium (ppm) | 0.079 | 0.028 | 0.046 | 0.112 | Aqua Regia Digestion |
Hf, Hafnium (ppm) | 0.51 | 0.07 | 0.45 | 0.57 | Aqua Regia Digestion |
Hg, Mercury (ppm) | 0.042 | 0.013 | 0.021 | 0.064 | Aqua Regia Digestion |
Ho, Holmium (ppm) | 0.25 | 0.04 | 0.19 | 0.31 | Aqua Regia Digestion |
In, Indium (ppm) | 0.024 | 0.003 | 0.020 | 0.027 | Aqua Regia Digestion |
K, Potassium (wt.%) | 0.169 | 0.021 | 0.155 | 0.182 | Aqua Regia Digestion |
La, Lanthanum (ppm) | 17.1 | 1.9 | 15.9 | 18.3 | Aqua Regia Digestion |
Li, Lithium (ppm) | 5.60 | 0.73 | 5.02 | 6.18 | Aqua Regia Digestion |
Mg, Magnesium (wt.%) | 0.400 | 0.022 | 0.385 | 0.415 | Aqua Regia Digestion |
Mn, Manganese (wt.%) | 0.016 | 0.001 | 0.015 | 0.016 | Aqua Regia Digestion |
Mo, Molybdenum (ppm) | 6.53 | 0.421 | 6.23 | 6.83 | Aqua Regia Digestion |
Na, Sodium (wt.%) | 0.090 | 0.007 | 0.081 | 0.098 | Aqua Regia Digestion |
Nb, Niobium (ppm) | 0.43 | 0.12 | 0.32 | 0.54 | Aqua Regia Digestion |
Ni, Nickel (ppm) | 40.3 | 1.98 | 38.4 | 42.2 | Aqua Regia Digestion |
P, Phosphorus (wt.%) | 0.036 | 0.002 | 0.034 | 0.037 | Aqua Regia Digestion |
Pb, Lead (ppm) | 8.83 | 0.90 | 8.27 | 9.40 | Aqua Regia Digestion |
Pr, Praseodymium (ppm) | 4.31 | 0.78 | 3.21 | 5.40 | Aqua Regia Digestion |
Rb, Rubidium (ppm) | 12.9 | 0.66 | 12.3 | 13.6 | Aqua Regia Digestion |
Re, Rhenium (ppm) | < 0.001 | IND | IND | IND | Aqua Regia Digestion |
S, Sulphur (wt.%) | 0.022 | 0.003 | 0.020 | 0.024 | Aqua Regia Digestion |
Sb, Antimony (ppm) | 1.82 | 0.21 | 1.67 | 1.96 | Aqua Regia Digestion |
Sc, Scandium (ppm) | 2.19 | 0.192 | 2.05 | 2.34 | Aqua Regia Digestion |
Sn, Tin (ppm) | 1.36 | 0.25 | 1.17 | 1.55 | Aqua Regia Digestion |
Sr, Strontium (ppm) | 35.4 | 4.2 | 32.9 | 37.9 | Aqua Regia Digestion |
Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
Tb, Terbium (ppm) | 0.29 | 0.021 | 0.26 | 0.33 | Aqua Regia Digestion |
Te, Tellurium (ppm) | 0.089 | 0.014 | 0.067 | 0.112 | Aqua Regia Digestion |
Th, Thorium (ppm) | 6.26 | 0.576 | 5.89 | 6.64 | Aqua Regia Digestion |
Ti, Titanium (wt.%) | 0.066 | 0.010 | 0.060 | 0.072 | Aqua Regia Digestion |
Tl, Thallium (ppm) | 0.11 | 0.01 | 0.09 | 0.12 | Aqua Regia Digestion |
U, Uranium (ppm) | 0.89 | 0.054 | 0.85 | 0.94 | Aqua Regia Digestion |
V, Vanadium (ppm) | 20.2 | 1.05 | 19.0 | 21.3 | Aqua Regia Digestion |
W, Tungsten (ppm) | 8.54 | 1.33 | 7.65 | 9.43 | Aqua Regia Digestion |
Y, Yttrium (ppm) | 6.43 | 0.203 | 6.12 | 6.74 | Aqua Regia Digestion |
Zn, Zinc (ppm) | 28.9 | 3.2 | 26.8 | 31.1 | Aqua Regia Digestion |
Zr, Zirconium (ppm) | 22.9 | 1.96 | 21.4 | 24.5 | Aqua Regia Digestion |
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