OREAS 601

OREAS 601 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 601 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.
Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Ag, Silver (ppm) 49.2 2.02 48.3 50.1 4-Acid Digestion
Cu, Copper (wt.%) 0.101 0.004 0.099 0.102 4-Acid Digestion
Au, Gold (ppm) 0.780 0.031 0.769 0.791 Pb Fire Assay
Al, Aluminium (wt.%) 6.30 0.284 6.18 6.42 4-Acid Digestion
As, Arsenic (ppm) 307 23 296 318 4-Acid Digestion
Be, Beryllium (ppm) 2.07 0.170 2.00 2.15 4-Acid Digestion
Bi, Bismuth (ppm) 20.9 1.79 20.2 21.6 4-Acid Digestion
Ca, Calcium (wt.%) 1.31 0.049 1.29 1.33 4-Acid Digestion
Cd, Cadmium (ppm) 7.86 0.528 7.62 8.10 4-Acid Digestion
Ce, Cerium (ppm) 63 2.8 61 65 4-Acid Digestion
Co, Cobalt (ppm) 5.14 0.64 4.87 5.41 4-Acid Digestion
Cr, Chromium (ppm) 42.0 7.7 39.1 44.9 4-Acid Digestion
Cs, Caesium (ppm) 6.72 0.384 6.46 6.98 4-Acid Digestion
Dy, Dysprosium (ppm) 2.69 0.096 2.58 2.79 4-Acid Digestion
Er, Erbium (ppm) 0.92 0.061 0.85 1.00 4-Acid Digestion
Eu, Europium (ppm) 1.23 0.21 0.95 1.50 4-Acid Digestion
Fe, Iron (wt.%) 2.48 0.159 2.41 2.55 4-Acid Digestion
Ga, Gallium (ppm) 20.4 0.60 20.1 20.6 4-Acid Digestion
Gd, Gadolinium (ppm) 4.50 0.48 3.98 5.02 4-Acid Digestion
Hf, Hafnium (ppm) 4.52 0.268 4.34 4.69 4-Acid Digestion
Ho, Holmium (ppm) 0.40 0.026 0.37 0.43 4-Acid Digestion
In, Indium (ppm) 1.73 0.150 1.63 1.84 4-Acid Digestion
K, Potassium (wt.%) 2.10 0.083 2.07 2.14 4-Acid Digestion
La, Lanthanum (ppm) 30.9 2.50 29.6 32.2 4-Acid Digestion
Li, Lithium (ppm) 20.5 1.34 19.7 21.3 4-Acid Digestion
Lu, Lutetium (ppm) 0.095 0.007 0.087 0.103 4-Acid Digestion
Mg, Magnesium (wt.%) 0.389 0.019 0.381 0.397 4-Acid Digestion
Mn, Manganese (wt.%) 0.048 0.002 0.047 0.049 4-Acid Digestion
Mo, Molybdenum (ppm) 3.87 0.56 3.65 4.09 4-Acid Digestion
Na, Sodium (wt.%) 1.45 0.069 1.42 1.49 4-Acid Digestion
Nb, Niobium (ppm) 12.6 0.96 12.0 13.1 4-Acid Digestion
Nd, Neodymium (ppm) 27.0 0.94 26.2 27.8 4-Acid Digestion
Ni, Nickel (ppm) 24.3 2.28 23.6 24.9 4-Acid Digestion
P, Phosphorus (wt.%) 0.047 0.003 0.046 0.048 4-Acid Digestion
Pb, Lead (ppm) 329 20 320 338 4-Acid Digestion
Pr, Praseodymium (ppm) 7.55 0.590 6.90 8.20 4-Acid Digestion
Rb, Rubidium (ppm) 97 3.6 95 99 4-Acid Digestion
S, Sulphur (wt.%) 1.07 0.040 1.05 1.09 4-Acid Digestion
Sb, Antimony (ppm) 30.4 2.57 29.3 31.4 4-Acid Digestion
Sc, Scandium (ppm) 4.85 0.374 4.67 5.02 4-Acid Digestion
Se, Selenium (ppm) 12.0 2.0 10.6 13.5 4-Acid Digestion
Sm, Samarium (ppm) 5.12 0.245 4.88 5.37 4-Acid Digestion
Sn, Tin (ppm) 4.16 0.297 3.93 4.40 4-Acid Digestion
Sr, Strontium (ppm) 230 11 225 235 4-Acid Digestion
Ta, Tantalum (ppm) 1.04 0.23 0.85 1.24 4-Acid Digestion
Tb, Terbium (ppm) 0.56 0.07 0.49 0.63 4-Acid Digestion
Te, Tellurium (ppm) 16.0 3.3 13.3 18.6 4-Acid Digestion
Th, Thorium (ppm) 11.7 0.75 11.1 12.2 4-Acid Digestion
Ti, Titanium (wt.%) 0.180 0.012 0.174 0.185 4-Acid Digestion
Tl, Thallium (ppm) 1.21 0.049 1.19 1.24 4-Acid Digestion
U, Uranium (ppm) 4.00 0.340 3.75 4.26 4-Acid Digestion
V, Vanadium (ppm) 25.6 1.33 25.0 26.1 4-Acid Digestion
W, Tungsten (ppm) 5.80 0.79 5.21 6.38 4-Acid Digestion
Y, Yttrium (ppm) 11.2 0.92 10.7 11.7 4-Acid Digestion
Yb, Ytterbium (ppm) 0.68 0.042 0.65 0.71 4-Acid Digestion
Zn, Zinc (ppm) 1330 64 1303 1358 4-Acid Digestion
Zr, Zirconium (ppm) 155 7 151 159 4-Acid Digestion
Ag, Silver (ppm) 49.4 1.47 48.8 50.1 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.826 0.085 0.783 0.869 Aqua Regia Digestion
As, Arsenic (ppm) 305 17 297 312 Aqua Regia Digestion
Au, Gold (ppm) 0.774 0.044 0.749 0.798 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) 0.62 0.059 0.58 0.65 Aqua Regia Digestion
Bi, Bismuth (ppm) 20.6 1.90 19.7 21.5 Aqua Regia Digestion
Ca, Calcium (wt.%) 1.07 0.064 1.04 1.10 Aqua Regia Digestion
Cd, Cadmium (ppm) 7.81 0.575 7.53 8.09 Aqua Regia Digestion
Ce, Cerium (ppm) 44.8 3.64 42.0 47.5 Aqua Regia Digestion
Co, Cobalt (ppm) 4.70 0.48 4.54 4.87 Aqua Regia Digestion
Cr, Chromium (ppm) 44.2 5.2 42.1 46.3 Aqua Regia Digestion
Cs, Caesium (ppm) 1.98 0.39 1.66 2.29 Aqua Regia Digestion
Cu, Copper (wt.%) 0.101 0.003 0.100 0.102 Aqua Regia Digestion
Dy, Dysprosium (ppm) 1.53 0.105 1.40 1.67 Aqua Regia Digestion
Er, Erbium (ppm) 0.47 0.038 0.42 0.52 Aqua Regia Digestion
Eu, Europium (ppm) 0.66 0.07 0.57 0.75 Aqua Regia Digestion
Fe, Iron (wt.%) 2.20 0.116 2.14 2.25 Aqua Regia Digestion
Ga, Gallium (ppm) 5.17 0.484 4.85 5.49 Aqua Regia Digestion
Gd, Gadolinium (ppm) 2.65 0.29 2.32 2.97 Aqua Regia Digestion
Hf, Hafnium (ppm) < 1.00 IND IND IND Aqua Regia Digestion
Hg, Mercury (ppm) < 3.00 IND IND IND Aqua Regia Digestion
Ho, Holmium (ppm) 0.21 0.021 0.19 0.24 Aqua Regia Digestion
In, Indium (ppm) 1.68 0.143 1.56 1.80 Aqua Regia Digestion
K, Potassium (wt.%) 0.251 0.018 0.242 0.261 Aqua Regia Digestion
La, Lanthanum (ppm) 21.2 1.55 20.4 21.9 Aqua Regia Digestion
Li, Lithium (ppm) 7.95 0.94 7.38 8.51 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.040 0.006 0.035 0.046 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.195 0.021 0.185 0.205 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.045 0.002 0.044 0.046 Aqua Regia Digestion
Mo, Molybdenum (ppm) 3.80 0.64 3.57 4.03 Aqua Regia Digestion
Na, Sodium (wt.%) 0.070 0.006 0.067 0.073 Aqua Regia Digestion
Nb, Niobium (ppm) < 1.00 IND IND IND Aqua Regia Digestion
Nd, Neodymium (ppm) 18.8 1.58 17.0 20.6 Aqua Regia Digestion
Ni, Nickel (ppm) 24.1 2.7 23.0 25.2 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.036 0.002 0.035 0.037 Aqua Regia Digestion
Pb, Lead (ppm) 283 9 279 287 Aqua Regia Digestion
Pr, Praseodymium (ppm) 5.37 0.313 4.98 5.76 Aqua Regia Digestion
Rb, Rubidium (ppm) 16.0 2.8 13.8 18.3 Aqua Regia Digestion
S, Sulphur (wt.%) 1.04 0.045 1.02 1.06 Aqua Regia Digestion
Sb, Antimony (ppm) 21.1 4.2 19.0 23.1 Aqua Regia Digestion
Sc, Scandium (ppm) 1.83 0.33 1.70 1.95 Aqua Regia Digestion
Se, Selenium (ppm) 12.3 1.6 11.3 13.2 Aqua Regia Digestion
Sm, Samarium (ppm) 3.42 0.318 3.07 3.77 Aqua Regia Digestion
Sn, Tin (ppm) 2.61 0.118 2.49 2.72 Aqua Regia Digestion
Sr, Strontium (ppm) 36.2 4.2 34.1 38.2 Aqua Regia Digestion
Tb, Terbium (ppm) 0.33 0.04 0.30 0.37 Aqua Regia Digestion
Te, Tellurium (ppm) 15.4 1.11 14.3 16.4 Aqua Regia Digestion
Th, Thorium (ppm) 6.70 0.522 6.29 7.10 Aqua Regia Digestion
Ti, Titanium (ppm) 103 14 94 113 Aqua Regia Digestion
Tl, Thallium (ppm) 0.74 0.08 0.68 0.80 Aqua Regia Digestion
U, Uranium (ppm) 1.94 0.191 1.79 2.08 Aqua Regia Digestion
V, Vanadium (ppm) 9.24 1.34 8.59 9.89 Aqua Regia Digestion
W, Tungsten (ppm) 1.06 0.17 0.88 1.24 Aqua Regia Digestion
Y, Yttrium (ppm) 5.87 0.549 5.51 6.22 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.30 0.020 0.29 0.31 Aqua Regia Digestion
Zn, Zinc (ppm) 1293 79 1259 1328 Aqua Regia Digestion
Zr, Zirconium (ppm) 26.7 5.2 23.4 29.9 Aqua Regia Digestion
S, Sulphur (wt.%) 1.10 0.031 1.09 1.12 Infrared Combustion
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