Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 253b was prepared from a blend of gold-bearing oxide ore and barren materials (basaltic scoria, quartz and mudstone). The ore (Wilber Lode) was sourced from the Andy Well Gold Project located approximately 45km north of Meekatharra in the Murchison region of Western Australia. The Wilber Lode is a shear- hosted, narrow vein, quartz lode-style gold deposit situated within the Meekatharra-Wydgee greenstone belt in the Archaean Yilgarn Craton of Western Australia. The common primary mineral assemblage as stated by Mason and Harris (2011, 2012, cited in Hingston et al, 2014) is quartz, calcite, chlorite, fuchsite, pyrite, galena, sphalerite, chalcopyrite and gold. The host rock consists of a complex sequence of weathered Archaean meta-basalt and meta-porphyritic rocks derived from a primary mineralogy of albite, actinolite, chlorite, sericite, biotite, calcite, zoisite, muscovite, quartz and titanate. 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 1g subsamples (see Table 5 in the ‘Homogeneity Evaluation’ of the Certificate).
Analyte | Certified Value | 1SD | Expanded Uncertainty Low | Expanded Uncertainty High | Method |
---|---|---|---|---|---|
Au, Gold (ppm) | 1.24 | 0.036 | 1.22 | 1.26 | Pb Fire Assay |
Au, Gold (ppm) | 1.23 | 0.046 | 1.20 | 1.25 | Aqua Regia Digestion (sample weights 10-50g) |
Au, Gold (ppm) | 1.21 | 0.032 | 1.19 | 1.23 | Cyanide Leach |
Au, Gold (ppm) | 1.26 | 0.051 | 1.25 | 1.27 | PhotonAssay |
Ag, Silver (ppm) | 0.348 | 0.025 | 0.316 | 0.380 | 4-Acid Digestion |
Al, Aluminium (wt.%) | 6.30 | 0.170 | 6.13 | 6.47 | 4-Acid Digestion |
As, Arsenic (ppm) | 235 | 11 | 226 | 243 | 4-Acid Digestion |
Ba, Barium (ppm) | 482 | 16 | 468 | 496 | 4-Acid Digestion |
Be, Beryllium (ppm) | 2.13 | 0.098 | 1.98 | 2.28 | 4-Acid Digestion |
Bi, Bismuth (ppm) | 4.34 | 0.279 | 4.06 | 4.62 | 4-Acid Digestion |
Ca, Calcium (wt.%) | 1.24 | 0.056 | 1.19 | 1.28 | 4-Acid Digestion |
Cd, Cadmium (ppm) | 0.059 | 0.021 | 0.041 | 0.077 | 4-Acid Digestion |
Ce, Cerium (ppm) | 76 | 5.9 | 73 | 80 | 4-Acid Digestion |
Co, Cobalt (ppm) | 15.0 | 0.62 | 14.5 | 15.4 | 4-Acid Digestion |
Cr, Chromium (ppm) | 120 | 16 | 111 | 129 | 4-Acid Digestion |
Cs, Caesium (ppm) | 5.06 | 0.341 | 4.85 | 5.27 | 4-Acid Digestion |
Cu, Copper (ppm) | 38.6 | 2.35 | 37.1 | 40.1 | 4-Acid Digestion |
Dy, Dysprosium (ppm) | 3.84 | 0.337 | 3.53 | 4.14 | 4-Acid Digestion |
Er, Erbium (ppm) | 1.81 | 0.24 | 1.59 | 2.04 | 4-Acid Digestion |
Eu, Europium (ppm) | 1.45 | 0.099 | 1.34 | 1.57 | 4-Acid Digestion |
Fe, Iron (wt.%) | 4.02 | 0.136 | 3.94 | 4.11 | 4-Acid Digestion |
Ga, Gallium (ppm) | 17.3 | 1.46 | 16.5 | 18.1 | 4-Acid Digestion |
Gd, Gadolinium (ppm) | 5.24 | 0.418 | 4.85 | 5.63 | 4-Acid Digestion |
Hf, Hafnium (ppm) | 4.33 | 0.217 | 4.14 | 4.53 | 4-Acid Digestion |
Ho, Holmium (ppm) | 0.64 | 0.047 | 0.59 | 0.70 | 4-Acid Digestion |
In, Indium (ppm) | 0.070 | 0.006 | 0.061 | 0.078 | 4-Acid Digestion |
K, Potassium (wt.%) | 1.74 | 0.052 | 1.69 | 1.78 | 4-Acid Digestion |
La, Lanthanum (ppm) | 39.7 | 2.75 | 37.5 | 41.8 | 4-Acid Digestion |
Li, Lithium (ppm) | 25.5 | 1.42 | 24.5 | 26.4 | 4-Acid Digestion |
Lu, Lutetium (ppm) | 0.25 | 0.021 | 0.23 | 0.28 | 4-Acid Digestion |
Mg, Magnesium (wt.%) | 1.24 | 0.055 | 1.20 | 1.28 | 4-Acid Digestion |
Mn, Manganese (wt.%) | 0.032 | 0.001 | 0.032 | 0.033 | 4-Acid Digestion |
Mo, Molybdenum (ppm) | 2.48 | 0.163 | 2.31 | 2.65 | 4-Acid Digestion |
Na, Sodium (wt.%) | 0.645 | 0.022 | 0.630 | 0.661 | 4-Acid Digestion |
Nb, Niobium (ppm) | 18.5 | 1.9 | 17.4 | 19.6 | 4-Acid Digestion |
Nd, Neodymium (ppm) | 33.6 | 1.33 | 31.9 | 35.3 | 4-Acid Digestion |
Ni, Nickel (ppm) | 67 | 2.2 | 65 | 70 | 4-Acid Digestion |
P, Phosphorus (wt.%) | 0.068 | 0.003 | 0.066 | 0.071 | 4-Acid Digestion |
Pb, Lead (ppm) | 15.0 | 1.40 | 13.7 | 16.2 | 4-Acid Digestion |
Pr, Praseodymium (ppm) | 8.99 | 0.580 | 8.44 | 9.54 | 4-Acid Digestion |
Rb, Rubidium (ppm) | 93 | 4.9 | 89 | 96 | 4-Acid Digestion |
Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
S, Sulphur (wt.%) | 0.021 | 0.004 | 0.018 | 0.024 | 4-Acid Digestion |
Sb, Antimony (ppm) | 11.1 | 0.80 | 10.4 | 11.8 | 4-Acid Digestion |
Sc, Scandium (ppm) | 13.2 | 0.83 | 12.5 | 13.9 | 4-Acid Digestion |
Se, Selenium (ppm) | < 1.00 | IND | IND | IND | 4-Acid Digestion |
Sm, Samarium (ppm) | 6.48 | 0.468 | 6.01 | 6.94 | 4-Acid Digestion |
Sn, Tin (ppm) | 6.92 | 0.661 | 6.49 | 7.35 | 4-Acid Digestion |
Sr, Strontium (ppm) | 186 | 10 | 179 | 192 | 4-Acid Digestion |
Ta, Tantalum (ppm) | 1.27 | 0.15 | 1.14 | 1.40 | 4-Acid Digestion |
Tb, Terbium (ppm) | 0.73 | 0.053 | 0.67 | 0.79 | 4-Acid Digestion |
Te, Tellurium (ppm) | < 0.10 | IND | IND | IND | 4-Acid Digestion |
Th, Thorium (ppm) | 12.9 | 0.72 | 12.3 | 13.4 | 4-Acid Digestion |
Ti, Titanium (wt.%) | 0.468 | 0.030 | 0.448 | 0.489 | 4-Acid Digestion |
Tl, Thallium (ppm) | 0.50 | 0.029 | 0.48 | 0.52 | 4-Acid Digestion |
Tm, Thulium (ppm) | 0.24 | 0.02 | 0.21 | 0.27 | 4-Acid Digestion |
U, Uranium (ppm) | 2.14 | 0.133 | 2.03 | 2.25 | 4-Acid Digestion |
V, Vanadium (ppm) | 90 | 4.8 | 86 | 94 | 4-Acid Digestion |
W, Tungsten (ppm) | 40.6 | 3.01 | 38.3 | 42.8 | 4-Acid Digestion |
Y, Yttrium (ppm) | 17.2 | 1.71 | 16.2 | 18.2 | 4-Acid Digestion |
Yb, Ytterbium (ppm) | 1.64 | 0.18 | 1.45 | 1.82 | 4-Acid Digestion |
Zn, Zinc (ppm) | 73 | 2.2 | 71 | 76 | 4-Acid Digestion |
Zr, Zirconium (ppm) | 157 | 9 | 152 | 162 | 4-Acid Digestion |
Ag, Silver (ppm) | 0.286 | 0.020 | 0.266 | 0.306 | Aqua Regia Digestion |
Al, Aluminium (wt.%) | 1.15 | 0.17 | 1.07 | 1.23 | Aqua Regia Digestion |
As, Arsenic (ppm) | 214 | 14 | 206 | 222 | Aqua Regia Digestion |
B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
Ba, Barium (ppm) | 66 | 5.8 | 61 | 71 | Aqua Regia Digestion |
Be, Beryllium (ppm) | 0.89 | 0.10 | 0.81 | 0.97 | Aqua Regia Digestion |
Bi, Bismuth (ppm) | 3.78 | 0.286 | 3.52 | 4.03 | Aqua Regia Digestion |
Ca, Calcium (wt.%) | 0.404 | 0.029 | 0.385 | 0.423 | Aqua Regia Digestion |
Cd, Cadmium (ppm) | 0.040 | 0.007 | 0.028 | 0.052 | Aqua Regia Digestion |
Ce, Cerium (ppm) | 49.7 | 4.08 | 47.0 | 52.3 | Aqua Regia Digestion |
Co, Cobalt (ppm) | 11.5 | 1.3 | 10.8 | 12.3 | Aqua Regia Digestion |
Cr, Chromium (ppm) | 66 | 5.7 | 61 | 70 | Aqua Regia Digestion |
Cs, Caesium (ppm) | 1.08 | 0.17 | 0.97 | 1.19 | Aqua Regia Digestion |
Cu, Copper (ppm) | 33.3 | 2.21 | 31.9 | 34.8 | Aqua Regia Digestion |
Dy, Dysprosium (ppm) | 2.14 | 0.174 | 1.88 | 2.40 | Aqua Regia Digestion |
Er, Erbium (ppm) | 0.83 | 0.070 | 0.74 | 0.93 | Aqua Regia Digestion |
Eu, Europium (ppm) | 0.88 | 0.09 | 0.75 | 1.00 | Aqua Regia Digestion |
Fe, Iron (wt.%) | 3.05 | 0.184 | 2.93 | 3.18 | Aqua Regia Digestion |
Ga, Gallium (ppm) | 3.99 | 0.48 | 3.65 | 4.33 | Aqua Regia Digestion |
Gd, Gadolinium (ppm) | 3.37 | 0.47 | 2.73 | 4.00 | Aqua Regia Digestion |
Ge, Germanium (ppm) | < 0.10 | IND | IND | IND | Aqua Regia Digestion |
Hf, Hafnium (ppm) | 0.52 | 0.11 | 0.43 | 0.61 | Aqua Regia Digestion |
Hg, Mercury (ppm) | 0.039 | 0.012 | 0.026 | 0.053 | Aqua Regia Digestion |
Ho, Holmium (ppm) | 0.34 | 0.04 | 0.29 | 0.39 | Aqua Regia Digestion |
In, Indium (ppm) | 0.022 | 0.003 | 0.017 | 0.026 | Aqua Regia Digestion |
K, Potassium (wt.%) | 0.191 | 0.032 | 0.175 | 0.207 | Aqua Regia Digestion |
La, Lanthanum (ppm) | 25.0 | 2.5 | 23.5 | 26.6 | Aqua Regia Digestion |
Li, Lithium (ppm) | 8.16 | 1.08 | 7.50 | 8.81 | Aqua Regia Digestion |
Lu, Lutetium (ppm) | 0.079 | 0.006 | 0.068 | 0.091 | Aqua Regia Digestion |
Mg, Magnesium (wt.%) | 0.572 | 0.048 | 0.541 | 0.603 | Aqua Regia Digestion |
Mn, Manganese (wt.%) | 0.019 | 0.002 | 0.019 | 0.020 | Aqua Regia Digestion |
Mo, Molybdenum (ppm) | 2.05 | 0.134 | 1.95 | 2.15 | Aqua Regia Digestion |
Na, Sodium (wt.%) | 0.136 | 0.009 | 0.127 | 0.144 | Aqua Regia Digestion |
Nb, Niobium (ppm) | 0.40 | 0.08 | 0.33 | 0.47 | Aqua Regia Digestion |
Nd, Neodymium (ppm) | 23.3 | 3.0 | 19.3 | 27.2 | Aqua Regia Digestion |
Ni, Nickel (ppm) | 54 | 3.8 | 52 | 57 | Aqua Regia Digestion |
P, Phosphorus (wt.%) | 0.051 | 0.002 | 0.050 | 0.053 | Aqua Regia Digestion |
Pb, Lead (ppm) | 9.41 | 0.765 | 8.90 | 9.92 | Aqua Regia Digestion |
Pd, Palladium (ppb) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
Pr, Praseodymium (ppm) | 5.72 | 0.58 | 4.97 | 6.48 | Aqua Regia Digestion |
Rb, Rubidium (ppm) | 11.6 | 1.7 | 10.6 | 12.7 | Aqua Regia Digestion |
Re, Rhenium (ppm) | < 0.001 | IND | IND | IND | Aqua Regia Digestion |
S, Sulphur (wt.%) | 0.018 | 0.003 | 0.017 | 0.019 | Aqua Regia Digestion |
Sb, Antimony (ppm) | 8.25 | 0.90 | 7.70 | 8.80 | Aqua Regia Digestion |
Sc, Scandium (ppm) | 3.83 | 0.336 | 3.56 | 4.09 | Aqua Regia Digestion |
Se, Selenium (ppm) | < 1.00 | IND | IND | IND | Aqua Regia Digestion |
Sm, Samarium (ppm) | 4.40 | 0.45 | 3.81 | 4.99 | Aqua Regia Digestion |
Sn, Tin (ppm) | 1.27 | 0.111 | 1.16 | 1.38 | Aqua Regia Digestion |
Sr, Strontium (ppm) | 31.9 | 3.9 | 29.7 | 34.1 | Aqua Regia Digestion |
Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
Tb, Terbium (ppm) | 0.44 | 0.043 | 0.39 | 0.49 | Aqua Regia Digestion |
Te, Tellurium (ppm) | 0.069 | 0.008 | 0.057 | 0.082 | Aqua Regia Digestion |
Th, Thorium (ppm) | 8.75 | 0.522 | 8.44 | 9.07 | Aqua Regia Digestion |
Ti, Titanium (wt.%) | 0.078 | 0.015 | 0.068 | 0.087 | Aqua Regia Digestion |
Tl, Thallium (ppm) | 0.081 | 0.010 | 0.072 | 0.090 | Aqua Regia Digestion |
Tm, Thulium (ppm) | 0.098 | 0.009 | 0.086 | 0.110 | Aqua Regia Digestion |
U, Uranium (ppm) | 1.01 | 0.043 | 0.97 | 1.05 | Aqua Regia Digestion |
V, Vanadium (ppm) | 30.6 | 2.54 | 28.8 | 32.4 | Aqua Regia Digestion |
W, Tungsten (ppm) | 16.9 | 3.0 | 15.0 | 18.8 | Aqua Regia Digestion |
Y, Yttrium (ppm) | 8.55 | 0.499 | 8.19 | 8.91 | Aqua Regia Digestion |
Yb, Ytterbium (ppm) | 0.61 | 0.047 | 0.53 | 0.68 | Aqua Regia Digestion |
Zn, Zinc (ppm) | 52 | 3.9 | 50 | 55 | Aqua Regia Digestion |
Zr, Zirconium (ppm) | 23.7 | 4.7 | 21.0 | 26.4 | Aqua Regia Digestion |
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