OREAS 621

OREAS 621 was prepared from Zn and Cu VHMS ores sourced from the Gossan Hill deposit at Golden Grove located 338km NNE of Perth in the Murchison Province of the Archaen Yilgarn Craton, Western Australia. The VHMS deposits are hosted within and underlain by a layered rhyodacitic volcanoclastic succession. The Gossan Hill ores have been blended with fresh, barren rhyodacite material sourced from a quarry approximately 30km east of Melbourne, Australia to achieve the desired grades. The main mineralisation assemblage consists of sphalerite, chalcopyrite and lesser galena with a gangue of pyrite, pyrrhotite and magnetite. Smith et al. (as cited in Smith, 2003) noted the ore shoots contain many chalcophile, or partly chalchophile elements namely Fe, S, Cu, Pb, Zn, Co, As, Sb, Bi, Cd, In, Mo, Ag, Sn, Ge, Se, Te, Hg and Au. OREAS 621 is one of a suite of five CRMs ranging in grades from 0.18-3.10% Cu, 1.0-10.2% Zn, 0.25-2.21% Pb, 22-103ppm Ag and 0.68-1.85ppm Au.    
Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Zn, Zinc (wt.%) 5.22 0.139 5.17 5.27 4-Acid Digestion
Cu, Copper (wt.%) 0.363 0.008 0.360 0.366 4-Acid Digestion
Au, Gold (ppm) 1.25 0.042 1.23 1.27 Pb Fire Assay
S, Sulphur (wt.%) 4.54 0.086 4.50 4.57 Infrared Combustion
Ag, Silver (ppm) 68.5 6.71 61.3 75.8 Borate / Peroxide Fusion ICP
Al, Aluminium (wt.%) 6.63 0.322 6.45 6.81 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 85 10 77 92 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 2612 118 2499 2725 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 2.00 0.37 1.61 2.38 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 4.00 0.172 3.85 4.15 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 2.00 0.108 1.94 2.06 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) 295 19 280 311 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 52 3.9 47 57 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 31.4 5.4 30.0 32.9 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 48.7 4.83 45.7 51.7 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 3.59 0.44 3.10 4.09 Borate / Peroxide Fusion ICP
Cu, Copper (wt.%) 0.368 0.017 0.359 0.377 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 3.71 0.114 3.66 3.77 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 26.5 2.54 25.0 28.0 Borate / Peroxide Fusion ICP
In, Indium (ppm) 1.93 0.23 1.78 2.09 Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 2.23 0.152 2.14 2.32 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 26.1 1.60 24.2 28.0 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.516 0.023 0.504 0.529 Borate / Peroxide Fusion ICP
Mn, Manganese (ppm) 554 42 532 576 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 13.5 2.7 11.1 15.9 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 10.4 0.90 9.6 11.2 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 24.2 2.7 20.6 27.9 Borate / Peroxide Fusion ICP
P, Phosphorus (ppm) 393 72 304 481 Borate / Peroxide Fusion ICP
Pb, Lead (wt.%) 1.33 0.060 1.29 1.36 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 6.64 0.654 5.76 7.51 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 89 2.6 86 91 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 4.51 0.076 4.45 4.56 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 146 11 138 154 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 28.05 0.747 27.71 28.40 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 101 13 91 111 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 8.56 0.532 8.03 9.10 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.181 0.009 0.177 0.185 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 1.99 0.113 1.85 2.12 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 3.00 0.290 2.72 3.28 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 36.3 3.55 32.7 39.9 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 2.63 0.37 2.23 3.04 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 13.9 0.73 13.2 14.7 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 1.03 0.057 0.97 1.09 Borate / Peroxide Fusion ICP
Zn, Zinc (wt.%) 5.22 0.223 5.10 5.33 Borate / Peroxide Fusion ICP
Ag, Silver (ppm) 69.2 2.65 68.0 70.3 4-Acid Digestion
Al, Aluminium (wt.%) 6.40 0.608 6.09 6.71 4-Acid Digestion
As, Arsenic (ppm) 77 4.2 76 79 4-Acid Digestion
Be, Beryllium (ppm) 1.69 0.23 1.61 1.77 4-Acid Digestion
Bi, Bismuth (ppm) 3.93 0.143 3.85 4.02 4-Acid Digestion
Ca, Calcium (wt.%) 1.97 0.072 1.94 2.00 4-Acid Digestion
Cd, Cadmium (ppm) 284 11 279 289 4-Acid Digestion
Ce, Cerium (ppm) 46.6 5.4 42.7 50.5 4-Acid Digestion
Co, Cobalt (ppm) 29.3 1.10 28.8 29.8 4-Acid Digestion
Cr, Chromium (ppm) 37.1 6.4 34.5 39.8 4-Acid Digestion
Cs, Caesium (ppm) 3.28 0.143 3.16 3.41 4-Acid Digestion
Fe, Iron (wt.%) 3.70 0.183 3.62 3.78 4-Acid Digestion
Ga, Gallium (ppm) 24.6 1.16 23.7 25.4 4-Acid Digestion
Hf, Hafnium (ppm) 4.41 0.308 4.20 4.62 4-Acid Digestion
In, Indium (ppm) 1.83 0.078 1.78 1.88 4-Acid Digestion
K, Potassium (wt.%) 2.20 0.149 2.13 2.26 4-Acid Digestion
La, Lanthanum (ppm) 21.6 3.4 19.5 23.7 4-Acid Digestion
Li, Lithium (ppm) 14.2 1.29 13.3 15.0 4-Acid Digestion
Lu, Lutetium (ppm) 0.14 0.02 0.12 0.15 4-Acid Digestion
Mg, Magnesium (wt.%) 0.507 0.053 0.481 0.532 4-Acid Digestion
Mn, Manganese (ppm) 532 21 523 541 4-Acid Digestion
Mo, Molybdenum (ppm) 13.6 1.6 12.8 14.4 4-Acid Digestion
Na, Sodium (wt.%) 1.31 0.084 1.27 1.35 4-Acid Digestion
Nb, Niobium (ppm) 8.61 0.616 8.24 8.99 4-Acid Digestion
Ni, Nickel (ppm) 26.2 3.3 25.3 27.1 4-Acid Digestion
P, Phosphorus (ppm) 359 32 346 371 4-Acid Digestion
Pb, Lead (wt.%) 1.36 0.039 1.34 1.37 4-Acid Digestion
Rb, Rubidium (ppm) 84 6.6 80 88 4-Acid Digestion
S, Sulphur (wt.%) 4.48 0.149 4.42 4.54 4-Acid Digestion
Sb, Antimony (ppm) 139 9 136 143 4-Acid Digestion
Sc, Scandium (ppm) 6.24 0.520 5.94 6.54 4-Acid Digestion
Se, Selenium (ppm) 5.64 1.11 4.92 6.36 4-Acid Digestion
Sn, Tin (ppm) 5.25 0.298 5.16 5.34 4-Acid Digestion
Sr, Strontium (ppm) 91 8.1 87 94 4-Acid Digestion
Ta, Tantalum (ppm) < 1.00 IND IND IND 4-Acid Digestion
Tb, Terbium (ppm) 0.46 0.038 0.43 0.49 4-Acid Digestion
Te, Tellurium (ppm) < 0.10 IND IND IND 4-Acid Digestion
Th, Thorium (ppm) 7.48 0.690 6.99 7.96 4-Acid Digestion
Ti, Titanium (wt.%) 0.149 0.024 0.138 0.160 4-Acid Digestion
Tl, Thallium (ppm) 1.96 0.127 1.86 2.05 4-Acid Digestion
U, Uranium (ppm) 2.83 0.155 2.73 2.93 4-Acid Digestion
V, Vanadium (ppm) 31.8 2.02 30.9 32.8 4-Acid Digestion
W, Tungsten (ppm) 2.35 0.219 2.19 2.50 4-Acid Digestion
Y, Yttrium (ppm) 11.1 1.3 10.3 11.8 4-Acid Digestion
Yb, Ytterbium (ppm) 0.99 0.097 0.91 1.08 4-Acid Digestion
Zr, Zirconium (ppm) 168 8 164 172 4-Acid Digestion
Ag, Silver (ppm) 66.5 3.26 64.3 68.7 3-Acid Digestion (no HF)
As, Arsenic (ppm) 74 8 68 80 3-Acid Digestion (no HF)
Cu, Copper (wt.%) 0.357 0.007 0.354 0.361 3-Acid Digestion (no HF)
Fe, Iron (wt.%) 3.52 0.099 3.45 3.58 3-Acid Digestion (no HF)
Mo, Molybdenum (ppm) 11.7 2.3 9.8 13.6 3-Acid Digestion (no HF)
Pb, Lead (wt.%) 1.34 0.037 1.32 1.37 3-Acid Digestion (no HF)
Zn, Zinc (wt.%) 5.20 0.201 5.07 5.33 3-Acid Digestion (no HF)
Ag, Silver (ppm) 68.0 2.41 67.0 69.1 Aqua Regia Digestion
Al, Aluminium (wt.%) 1.60 0.125 1.54 1.65 Aqua Regia Digestion
As, Arsenic (ppm) 75 6.6 72 78 Aqua Regia Digestion
Au, Gold (ppm) 1.23 0.043 1.21 1.25 Aqua Regia Digestion
Be, Beryllium (ppm) 0.53 0.07 0.48 0.58 Aqua Regia Digestion
Bi, Bismuth (ppm) 3.85 0.345 3.65 4.05 Aqua Regia Digestion
Ca, Calcium (wt.%) 1.65 0.058 1.63 1.68 Aqua Regia Digestion
Cd, Cadmium (ppm) 278 14 271 285 Aqua Regia Digestion
Ce, Cerium (ppm) 39.6 4.0 36.7 42.4 Aqua Regia Digestion
Co, Cobalt (ppm) 27.9 1.84 27.1 28.7 Aqua Regia Digestion
Cr, Chromium (ppm) 31.3 2.80 30.4 32.3 Aqua Regia Digestion
Cs, Caesium (ppm) 1.01 0.14 0.90 1.12 Aqua Regia Digestion
Cu, Copper (wt.%) 0.366 0.011 0.362 0.370 Aqua Regia Digestion
Fe, Iron (wt.%) 3.43 0.151 3.36 3.49 Aqua Regia Digestion
Ga, Gallium (ppm) 9.29 1.01 8.65 9.92 Aqua Regia Digestion
Hf, Hafnium (ppm) 1.43 0.27 1.22 1.64 Aqua Regia Digestion
Hg, Mercury (ppm) 3.93 0.099 3.89 3.98 Aqua Regia Digestion
In, Indium (ppm) 1.73 0.097 1.65 1.81 Aqua Regia Digestion
K, Potassium (wt.%) 0.333 0.047 0.311 0.355 Aqua Regia Digestion
La, Lanthanum (ppm) 19.4 2.4 18.1 20.7 Aqua Regia Digestion
Li, Lithium (ppm) 8.17 1.21 7.24 9.10 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.078 0.014 0.065 0.091 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.436 0.028 0.423 0.449 Aqua Regia Digestion
Mn, Manganese (ppm) 520 20 511 529 Aqua Regia Digestion
Mo, Molybdenum (ppm) 13.3 1.27 12.7 13.9 Aqua Regia Digestion
Na, Sodium (wt.%) 0.160 0.026 0.148 0.173 Aqua Regia Digestion
Ni, Nickel (ppm) 25.8 1.54 25.2 26.3 Aqua Regia Digestion
P, Phosphorus (ppm) 335 26 324 346 Aqua Regia Digestion
Pb, Lead (wt.%) 1.36 0.030 1.34 1.37 Aqua Regia Digestion
Rb, Rubidium (ppm) < 20.0 IND IND IND Aqua Regia Digestion
S, Sulphur (wt.%) 4.50 0.134 4.44 4.56 Aqua Regia Digestion
Sb, Antimony (ppm) 107 21 97 116 Aqua Regia Digestion
Sc, Scandium (ppm) 2.20 0.32 1.99 2.40 Aqua Regia Digestion
Se, Selenium (ppm) 5.64 1.12 4.82 6.46 Aqua Regia Digestion
Sn, Tin (ppm) 2.68 0.175 2.57 2.79 Aqua Regia Digestion
Sr, Strontium (ppm) 18.9 1.68 18.2 19.7 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.050 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.33 0.030 0.31 0.36 Aqua Regia Digestion
Te, Tellurium (ppm) < 0.10 IND IND IND Aqua Regia Digestion
Th, Thorium (ppm) 5.91 0.378 5.62 6.20 Aqua Regia Digestion
Ti, Titanium (wt.%) < 0.050 IND IND IND Aqua Regia Digestion
Tl, Thallium (ppm) 0.77 0.09 0.72 0.83 Aqua Regia Digestion
U, Uranium (ppm) 1.63 0.162 1.50 1.75 Aqua Regia Digestion
V, Vanadium (ppm) 10.9 1.2 10.3 11.4 Aqua Regia Digestion
W, Tungsten (ppm) 1.00 0.16 0.89 1.12 Aqua Regia Digestion
Y, Yttrium (ppm) 6.87 0.80 6.28 7.46 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.52 0.09 0.45 0.59 Aqua Regia Digestion
Zn, Zinc (wt.%) 5.17 0.148 5.11 5.23 Aqua Regia Digestion
Zr, Zirconium (ppm) 55 3.7 52 58 Aqua Regia Digestion
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