OREAS 603

OREAS 603 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 603 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) 284 16 275 294 Pb Fire Assay
Cu, Copper (wt.%) 1.00 0.034 0.99 1.02 4-Acid Digestion
Au, Gold (ppm) 5.18 0.151 5.12 5.23 Pb Fire Assay
Ag, Silver (ppm) 298 8 294 301 4-Acid Digestion
Al, Aluminium (wt.%) 3.98 0.156 3.90 4.06 4-Acid Digestion
As, Arsenic (ppm) 1801 119 1743 1858 4-Acid Digestion
Be, Beryllium (ppm) 0.71 0.08 0.67 0.75 4-Acid Digestion
Bi, Bismuth (ppm) 149 13 143 155 4-Acid Digestion
Ca, Calcium (wt.%) 0.318 0.015 0.312 0.324 4-Acid Digestion
Cd, Cadmium (ppm) 54 3.3 52 55 4-Acid Digestion
Ce, Cerium (ppm) 25.7 3.7 22.2 29.2 4-Acid Digestion
Co, Cobalt (ppm) 15.3 0.96 14.9 15.7 4-Acid Digestion
Cr, Chromium (ppm) 30.2 5.3 27.8 32.7 4-Acid Digestion
Cs, Caesium (ppm) 1.66 0.071 1.61 1.72 4-Acid Digestion
Dy, Dysprosium (ppm) 1.21 0.072 1.15 1.27 4-Acid Digestion
Er, Erbium (ppm) 0.59 0.024 0.58 0.61 4-Acid Digestion
Eu, Europium (ppm) < 1.00 IND IND IND 4-Acid Digestion
Fe, Iron (wt.%) 2.92 0.135 2.86 2.98 4-Acid Digestion
Ga, Gallium (ppm) 22.2 1.96 21.1 23.3 4-Acid Digestion
Gd, Gadolinium (ppm) 1.77 0.107 1.69 1.85 4-Acid Digestion
Hf, Hafnium (ppm) 2.53 0.167 2.42 2.63 4-Acid Digestion
Ho, Holmium (ppm) 0.21 0.020 0.19 0.23 4-Acid Digestion
In, Indium (ppm) 11.2 0.96 10.7 11.7 4-Acid Digestion
K, Potassium (wt.%) 0.623 0.019 0.614 0.632 4-Acid Digestion
La, Lanthanum (ppm) 11.9 2.3 10.5 13.3 4-Acid Digestion
Li, Lithium (ppm) 18.9 1.30 18.2 19.7 4-Acid Digestion
Lu, Lutetium (ppm) 0.099 0.012 0.088 0.109 4-Acid Digestion
Mg, Magnesium (ppm) 828 45 809 848 4-Acid Digestion
Mn, Manganese (ppm) 133 11 127 138 4-Acid Digestion
Mo, Molybdenum (ppm) 6.05 0.516 5.83 6.27 4-Acid Digestion
Na, Sodium (wt.%) 0.428 0.015 0.421 0.436 4-Acid Digestion
Nb, Niobium (ppm) 7.09 0.74 6.55 7.64 4-Acid Digestion
Nd, Neodymium (ppm) 11.4 1.1 10.1 12.7 4-Acid Digestion
Ni, Nickel (ppm) 112 5 110 114 4-Acid Digestion
P, Phosphorus (ppm) 534 31 523 545 4-Acid Digestion
Pb, Lead (ppm) 1908 125 1852 1964 4-Acid Digestion
Pr, Praseodymium (ppm) 3.23 0.190 3.01 3.44 4-Acid Digestion
Rb, Rubidium (ppm) 23.6 1.91 22.3 25.0 4-Acid Digestion
S, Sulphur (wt.%) 3.71 0.161 3.62 3.79 4-Acid Digestion
Sb, Antimony (ppm) 205 18 196 214 4-Acid Digestion
Sc, Scandium (ppm) 4.04 0.50 3.81 4.27 4-Acid Digestion
Se, Selenium (ppm) 60 9 55 66 4-Acid Digestion
Sm, Samarium (ppm) 2.14 0.134 2.00 2.27 4-Acid Digestion
Sn, Tin (ppm) 12.9 0.98 12.3 13.5 4-Acid Digestion
Sr, Strontium (ppm) 459 77 422 497 4-Acid Digestion
Ta, Tantalum (ppm) < 1.00 IND IND IND 4-Acid Digestion
Tb, Terbium (ppm) 0.23 0.023 0.21 0.25 4-Acid Digestion
Te, Tellurium (ppm) 56 7 49 63 4-Acid Digestion
Th, Thorium (ppm) 5.90 0.85 5.28 6.52 4-Acid Digestion
Ti, Titanium (wt.%) 0.191 0.018 0.182 0.200 4-Acid Digestion
Tl, Thallium (ppm) 4.18 0.174 4.07 4.29 4-Acid Digestion
U, Uranium (ppm) 2.71 0.144 2.60 2.81 4-Acid Digestion
V, Vanadium (ppm) 32.0 2.22 31.0 33.0 4-Acid Digestion
W, Tungsten (ppm) 14.0 2.6 12.6 15.4 4-Acid Digestion
Y, Yttrium (ppm) 5.64 0.431 5.43 5.85 4-Acid Digestion
Yb, Ytterbium (ppm) 0.61 0.09 0.53 0.69 4-Acid Digestion
Zn, Zinc (wt.%) 0.920 0.031 0.906 0.934 4-Acid Digestion
Zr, Zirconium (ppm) 78 6.0 75 81 4-Acid Digestion
Ag, Silver (ppm) 293 13 286 300 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.580 0.092 0.537 0.624 Aqua Regia Digestion
As, Arsenic (ppm) 1766 91 1722 1810 Aqua Regia Digestion
Au, Gold (ppm) 5.08 0.179 4.96 5.19 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) < 0.50 IND IND IND Aqua Regia Digestion
Bi, Bismuth (ppm) 151 14 144 158 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.237 0.017 0.229 0.245 Aqua Regia Digestion
Cd, Cadmium (ppm) 55 3.6 53 57 Aqua Regia Digestion
Ce, Cerium (ppm) 13.0 2.4 11.2 14.7 Aqua Regia Digestion
Co, Cobalt (ppm) 15.2 0.79 14.8 15.5 Aqua Regia Digestion
Cr, Chromium (ppm) 29.2 2.47 28.2 30.2 Aqua Regia Digestion
Cs, Caesium (ppm) 0.74 0.12 0.65 0.83 Aqua Regia Digestion
Cu, Copper (wt.%) 1.01 0.026 1.00 1.02 Aqua Regia Digestion
Dy, Dysprosium (ppm) 0.56 0.06 0.49 0.63 Aqua Regia Digestion
Er, Erbium (ppm) 0.22 0.03 0.19 0.25 Aqua Regia Digestion
Eu, Europium (ppm) 0.25 0.05 0.18 0.32 Aqua Regia Digestion
Fe, Iron (wt.%) 2.85 0.155 2.78 2.92 Aqua Regia Digestion
Ga, Gallium (ppm) 6.58 0.84 6.08 7.09 Aqua Regia Digestion
Gd, Gadolinium (ppm) 0.86 0.12 0.74 0.98 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.46 0.07 0.40 0.52 Aqua Regia Digestion
Hg, Mercury (ppm) < 4.00 IND IND IND Aqua Regia Digestion
Ho, Holmium (ppm) 0.096 0.013 0.082 0.111 Aqua Regia Digestion
In, Indium (ppm) 11.7 1.15 10.9 12.5 Aqua Regia Digestion
K, Potassium (wt.%) 0.093 0.015 0.086 0.100 Aqua Regia Digestion
La, Lanthanum (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Li, Lithium (ppm) 4.62 0.82 4.10 5.14 Aqua Regia Digestion
Lu, Lutetium (ppb) 26 5 22 31 Aqua Regia Digestion
Mg, Magnesium (ppm) 517 61 490 543 Aqua Regia Digestion
Mn, Manganese (ppm) 130 6 127 133 Aqua Regia Digestion
Mo, Molybdenum (ppm) 6.10 0.564 5.82 6.39 Aqua Regia Digestion
Na, Sodium (ppm) 275 58 247 302 Aqua Regia Digestion
Nb, Niobium (ppm) < 0.50 IND IND IND Aqua Regia Digestion
Nd, Neodymium (ppm) 5.90 0.71 5.11 6.69 Aqua Regia Digestion
Ni, Nickel (ppm) 113 3 111 114 Aqua Regia Digestion
P, Phosphorus (ppm) 172 27 159 186 Aqua Regia Digestion
Pb, Lead (ppm) 1691 36 1674 1707 Aqua Regia Digestion
Pr, Praseodymium (ppm) 1.57 0.25 1.28 1.85 Aqua Regia Digestion
Rb, Rubidium (ppm) 4.89 0.88 4.20 5.59 Aqua Regia Digestion
S, Sulphur (wt.%) 3.46 0.185 3.36 3.56 Aqua Regia Digestion
Sb, Antimony (ppm) 160 24 148 172 Aqua Regia Digestion
Sc, Scandium (ppm) 1.06 0.16 0.98 1.15 Aqua Regia Digestion
Se, Selenium (ppm) 59 8 54 64 Aqua Regia Digestion
Sm, Samarium (ppm) 1.12 0.13 0.98 1.25 Aqua Regia Digestion
Sn, Tin (ppm) 12.0 1.11 11.3 12.7 Aqua Regia Digestion
Sr, Strontium (ppm) 46.4 6.1 43.0 49.8 Aqua Regia Digestion
Tb, Terbium (ppm) 0.11 0.02 0.10 0.13 Aqua Regia Digestion
Te, Tellurium (ppm) 57 2.8 55 60 Aqua Regia Digestion
Th, Thorium (ppm) 2.30 0.29 2.05 2.55 Aqua Regia Digestion
Ti, Titanium (ppm) 98 13 87 108 Aqua Regia Digestion
Tl, Thallium (ppm) 4.07 0.60 3.62 4.52 Aqua Regia Digestion
U, Uranium (ppm) 0.89 0.10 0.81 0.96 Aqua Regia Digestion
V, Vanadium (ppm) 10.0 1.1 9.5 10.6 Aqua Regia Digestion
W, Tungsten (ppm) 3.88 0.78 3.20 4.57 Aqua Regia Digestion
Y, Yttrium (ppm) 2.28 0.35 2.04 2.52 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.17 0.02 0.16 0.19 Aqua Regia Digestion
Zn, Zinc (wt.%) 0.911 0.034 0.895 0.926 Aqua Regia Digestion
Zr, Zirconium (ppm) 16.0 1.6 15.0 17.0 Aqua Regia Digestion
S, Sulphur (wt.%) 3.97 0.161 3.88 4.06 Infrared Combustion
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