Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 264 was prepared from oxide heap leach material sourced from the
Goldstrike operation in Eureka County in north-eastern Nevada. The mining
operation is located on the Carlin Trend and owned by Nevada Gold Mines
(operated by Barrick).
Thirty-one commercial analytical laboratories
participated in the program to certify the elements shown below. The following
methods were employed:
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
---|---|---|---|---|---|
Au, Gold (ppm) | 0.307 | 0.011 | 0.304 | 0.311 | Pb Fire Assay |
Au, Gold (ppm) | 0.295 | 0.015 | 0.289 | 0.301 | Aqua Regia Digestion (sample weights 10-50g) |
Au, Gold (ppm) | 0.273 | 0.021 | 0.264 | 0.282 | Cyanide Leach |
Au, Gold (ppm) | 0.314 | 0.033 | 0.300 | 0.328 | PhotonAssay |
Ag, Silver (ppm) | 1.29 | 0.063 | 1.25 | 1.32 | 4-Acid Digestion |
Al, Aluminium (wt.%) | 4.31 | 0.103 | 4.28 | 4.35 | 4-Acid Digestion |
As, Arsenic (ppm) | 305 | 14 | 299 | 311 | 4-Acid Digestion |
Ba, Barium (ppm) | 841 | 21 | 833 | 849 | 4-Acid Digestion |
Be, Beryllium (ppm) | 1.49 | 0.104 | 1.44 | 1.53 | 4-Acid Digestion |
Bi, Bismuth (ppm) | 0.17 | 0.013 | 0.17 | 0.18 | 4-Acid Digestion |
Ca, Calcium (wt.%) | 0.405 | 0.019 | 0.397 | 0.413 | 4-Acid Digestion |
Cd, Cadmium (ppm) | 2.21 | 0.200 | 2.13 | 2.29 | 4-Acid Digestion |
Ce, Cerium (ppm) | 42.3 | 2.06 | 41.4 | 43.2 | 4-Acid Digestion |
Co, Cobalt (ppm) | 9.71 | 0.410 | 9.51 | 9.91 | 4-Acid Digestion |
Cr, Chromium (ppm) | 72 | 11 | 67 | 76 | 4-Acid Digestion |
Cs, Caesium (ppm) | 5.87 | 0.306 | 5.73 | 6.00 | 4-Acid Digestion |
Cu, Copper (ppm) | 94 | 4.2 | 92 | 95 | 4-Acid Digestion |
Dy, Dysprosium (ppm) | 3.64 | 0.173 | 3.52 | 3.76 | 4-Acid Digestion |
Er, Erbium (ppm) | 2.07 | 0.174 | 1.97 | 2.18 | 4-Acid Digestion |
Eu, Europium (ppm) | 0.93 | 0.069 | 0.88 | 0.99 | 4-Acid Digestion |
Fe, Iron (wt.%) | 2.24 | 0.072 | 2.21 | 2.27 | 4-Acid Digestion |
Ga, Gallium (ppm) | 12.7 | 0.46 | 12.5 | 12.9 | 4-Acid Digestion |
Gd, Gadolinium (ppm) | 3.97 | 0.382 | 3.73 | 4.21 | 4-Acid Digestion |
Hf, Hafnium (ppm) | 1.87 | 0.21 | 1.78 | 1.97 | 4-Acid Digestion |
Ho, Holmium (ppm) | 0.70 | 0.08 | 0.64 | 0.76 | 4-Acid Digestion |
In, Indium (ppm) | 0.039 | 0.002 | 0.039 | 0.040 | 4-Acid Digestion |
K, Potassium (wt.%) | 1.84 | 0.050 | 1.82 | 1.85 | 4-Acid Digestion |
La, Lanthanum (ppm) | 22.8 | 1.77 | 22.1 | 23.5 | 4-Acid Digestion |
Li, Lithium (ppm) | 19.8 | 1.00 | 19.5 | 20.2 | 4-Acid Digestion |
Lu, Lutetium (ppm) | 0.31 | 0.028 | 0.28 | 0.33 | 4-Acid Digestion |
Mg, Magnesium (wt.%) | 0.315 | 0.011 | 0.311 | 0.319 | 4-Acid Digestion |
Mn, Manganese (wt.%) | 0.045 | 0.001 | 0.045 | 0.046 | 4-Acid Digestion |
Mo, Molybdenum (ppm) | 9.69 | 0.461 | 9.50 | 9.88 | 4-Acid Digestion |
Na, Sodium (wt.%) | 0.036 | 0.010 | 0.032 | 0.040 | 4-Acid Digestion |
Nb, Niobium (ppm) | 7.79 | 0.533 | 7.56 | 8.02 | 4-Acid Digestion |
Nd, Neodymium (ppm) | 21.1 | 1.15 | 20.4 | 21.9 | 4-Acid Digestion |
Ni, Nickel (ppm) | 61 | 2.3 | 60 | 62 | 4-Acid Digestion |
P, Phosphorus (wt.%) | 0.217 | 0.008 | 0.214 | 0.221 | 4-Acid Digestion |
Pb, Lead (ppm) | 9.88 | 0.587 | 9.65 | 10.12 | 4-Acid Digestion |
Pr, Praseodymium (ppm) | 5.49 | 0.351 | 5.28 | 5.70 | 4-Acid Digestion |
Rb, Rubidium (ppm) | 76 | 3.7 | 75 | 78 | 4-Acid Digestion |
Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
S, Sulphur (wt.%) | 0.129 | 0.004 | 0.128 | 0.131 | 4-Acid Digestion |
Sb, Antimony (ppm) | 26.3 | 2.43 | 25.3 | 27.4 | 4-Acid Digestion |
Sc, Scandium (ppm) | 8.38 | 0.310 | 8.25 | 8.52 | 4-Acid Digestion |
Se, Selenium (ppm) | 6.76 | 0.89 | 6.37 | 7.15 | 4-Acid Digestion |
Sm, Samarium (ppm) | 4.24 | 0.263 | 4.09 | 4.39 | 4-Acid Digestion |
Sn, Tin (ppm) | 1.42 | 0.134 | 1.36 | 1.48 | 4-Acid Digestion |
Sr, Strontium (ppm) | 100 | 3.3 | 99 | 101 | 4-Acid Digestion |
Ta, Tantalum (ppm) | 0.53 | 0.034 | 0.51 | 0.55 | 4-Acid Digestion |
Tb, Terbium (ppm) | 0.58 | 0.058 | 0.54 | 0.62 | 4-Acid Digestion |
Te, Tellurium (ppm) | 0.11 | 0.02 | 0.10 | 0.12 | 4-Acid Digestion |
Th, Thorium (ppm) | 6.99 | 0.431 | 6.81 | 7.18 | 4-Acid Digestion |
Ti, Titanium (wt.%) | 0.223 | 0.009 | 0.219 | 0.227 | 4-Acid Digestion |
Tl, Thallium (ppm) | 1.45 | 0.050 | 1.42 | 1.47 | 4-Acid Digestion |
Tm, Thulium (ppm) | 0.29 | 0.04 | 0.26 | 0.33 | 4-Acid Digestion |
U, Uranium (ppm) | 5.72 | 0.307 | 5.59 | 5.85 | 4-Acid Digestion |
V, Vanadium (ppm) | 301 | 10 | 297 | 305 | 4-Acid Digestion |
W, Tungsten (ppm) | 5.28 | 0.298 | 5.15 | 5.42 | 4-Acid Digestion |
Y, Yttrium (ppm) | 20.8 | 1.07 | 20.4 | 21.2 | 4-Acid Digestion |
Yb, Ytterbium (ppm) | 2.10 | 0.21 | 1.98 | 2.23 | 4-Acid Digestion |
Zn, Zinc (ppm) | 224 | 7 | 221 | 227 | 4-Acid Digestion |
Zr, Zirconium (ppm) | 70 | 7 | 67 | 73 | 4-Acid Digestion |
Ag, Silver (ppm) | 0.573 | 0.032 | 0.557 | 0.589 | Aqua Regia Digestion |
Al, Aluminium (wt.%) | 1.21 | 0.142 | 1.14 | 1.28 | Aqua Regia Digestion |
As, Arsenic (ppm) | 300 | 13 | 295 | 306 | Aqua Regia Digestion |
Ba, Barium (ppm) | 482 | 22 | 472 | 493 | Aqua Regia Digestion |
Be, Beryllium (ppm) | 1.01 | 0.075 | 0.98 | 1.05 | Aqua Regia Digestion |
Bi, Bismuth (ppm) | 0.16 | 0.013 | 0.16 | 0.17 | Aqua Regia Digestion |
Ca, Calcium (wt.%) | 0.389 | 0.021 | 0.381 | 0.398 | Aqua Regia Digestion |
Cd, Cadmium (ppm) | 2.26 | 0.178 | 2.19 | 2.34 | Aqua Regia Digestion |
Ce, Cerium (ppm) | 10.4 | 0.89 | 10.0 | 10.9 | Aqua Regia Digestion |
Co, Cobalt (ppm) | 9.66 | 0.494 | 9.44 | 9.87 | Aqua Regia Digestion |
Cr, Chromium (ppm) | 37.9 | 4.1 | 36.0 | 39.7 | Aqua Regia Digestion |
Cs, Caesium (ppm) | 2.76 | 0.51 | 2.51 | 3.01 | Aqua Regia Digestion |
Cu, Copper (ppm) | 92 | 2.9 | 91 | 93 | Aqua Regia Digestion |
Dy, Dysprosium (ppm) | 2.61 | 0.220 | 2.43 | 2.78 | Aqua Regia Digestion |
Er, Erbium (ppm) | 1.24 | 0.090 | 1.18 | 1.30 | Aqua Regia Digestion |
Eu, Europium (ppm) | 0.65 | 0.035 | 0.61 | 0.69 | Aqua Regia Digestion |
Fe, Iron (wt.%) | 2.09 | 0.075 | 2.06 | 2.13 | Aqua Regia Digestion |
Ga, Gallium (ppm) | 4.05 | 0.363 | 3.83 | 4.27 | Aqua Regia Digestion |
Gd, Gadolinium (ppm) | 3.08 | 0.31 | 2.83 | 3.33 | Aqua Regia Digestion |
Ge, Germanium (ppm) | < 0.10 | IND | IND | IND | Aqua Regia Digestion |
Hf, Hafnium (ppm) | 0.20 | 0.03 | 0.18 | 0.22 | Aqua Regia Digestion |
Hg, Mercury (ppm) | 1.96 | 0.159 | 1.87 | 2.04 | Aqua Regia Digestion |
Ho, Holmium (ppm) | 0.48 | 0.026 | 0.45 | 0.50 | Aqua Regia Digestion |
In, Indium (ppm) | 0.030 | 0.001 | 0.029 | 0.030 | Aqua Regia Digestion |
K, Potassium (wt.%) | 0.529 | 0.068 | 0.498 | 0.560 | Aqua Regia Digestion |
La, Lanthanum (ppm) | 5.02 | 0.363 | 4.84 | 5.19 | Aqua Regia Digestion |
Li, Lithium (ppm) | 3.63 | 0.233 | 3.50 | 3.76 | Aqua Regia Digestion |
Lu, Lutetium (ppm) | 0.13 | 0.008 | 0.13 | 0.14 | Aqua Regia Digestion |
Mg, Magnesium (wt.%) | 0.099 | 0.011 | 0.093 | 0.104 | Aqua Regia Digestion |
Mn, Manganese (wt.%) | 0.046 | 0.002 | 0.045 | 0.046 | Aqua Regia Digestion |
Mo, Molybdenum (ppm) | 9.15 | 0.668 | 8.86 | 9.45 | Aqua Regia Digestion |
Nb, Niobium (ppm) | 0.063 | 0.012 | 0.054 | 0.071 | Aqua Regia Digestion |
Nd, Neodymium (ppm) | 7.55 | 1.09 | 6.63 | 8.48 | Aqua Regia Digestion |
Ni, Nickel (ppm) | 59 | 2.9 | 58 | 60 | Aqua Regia Digestion |
P, Phosphorus (wt.%) | 0.204 | 0.011 | 0.200 | 0.209 | Aqua Regia Digestion |
Pb, Lead (ppm) | 9.30 | 0.520 | 9.05 | 9.54 | Aqua Regia Digestion |
Pr, Praseodymium (ppm) | 1.66 | 0.27 | 1.43 | 1.89 | Aqua Regia Digestion |
Rb, Rubidium (ppm) | 21.5 | 3.5 | 19.6 | 23.4 | Aqua Regia Digestion |
S, Sulphur (wt.%) | 0.104 | 0.011 | 0.099 | 0.109 | Aqua Regia Digestion |
Sb, Antimony (ppm) | 13.9 | 2.5 | 12.8 | 15.0 | Aqua Regia Digestion |
Sc, Scandium (ppm) | 4.89 | 0.277 | 4.75 | 5.03 | Aqua Regia Digestion |
Se, Selenium (ppm) | 6.09 | 0.87 | 5.60 | 6.57 | Aqua Regia Digestion |
Sm, Samarium (ppm) | 2.34 | 0.186 | 2.19 | 2.49 | Aqua Regia Digestion |
Sn, Tin (ppm) | 0.58 | 0.08 | 0.54 | 0.62 | Aqua Regia Digestion |
Sr, Strontium (ppm) | 79 | 5.1 | 77 | 81 | Aqua Regia Digestion |
Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
Tb, Terbium (ppm) | 0.45 | 0.026 | 0.43 | 0.47 | Aqua Regia Digestion |
Te, Tellurium (ppm) | 0.10 | 0.01 | 0.10 | 0.11 | Aqua Regia Digestion |
Th, Thorium (ppm) | 2.60 | 0.26 | 2.47 | 2.73 | Aqua Regia Digestion |
Tl, Thallium (ppm) | 0.93 | 0.052 | 0.91 | 0.96 | Aqua Regia Digestion |
Tm, Thulium (ppm) | 0.15 | 0.007 | 0.15 | 0.16 | Aqua Regia Digestion |
U, Uranium (ppm) | 3.33 | 0.147 | 3.26 | 3.39 | Aqua Regia Digestion |
V, Vanadium (ppm) | 146 | 16 | 139 | 154 | Aqua Regia Digestion |
W, Tungsten (ppm) | 1.32 | 0.23 | 1.22 | 1.43 | Aqua Regia Digestion |
Y, Yttrium (ppm) | 13.5 | 0.83 | 13.1 | 13.9 | Aqua Regia Digestion |
Yb, Ytterbium (ppm) | 0.95 | 0.052 | 0.92 | 0.99 | Aqua Regia Digestion |
Zn, Zinc (ppm) | 221 | 9 | 218 | 225 | Aqua Regia Digestion |
Zr, Zirconium (ppm) | 7.79 | 1.16 | 7.12 | 8.47 | Aqua Regia Digestion |
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