OREAS 624

OREAS 624 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 624 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 Low 95% Confidence High Method
Zn, Zinc (wt.%) 2.40 0.078 2.37 2.43 4-Acid Digestion
Cu, Copper (wt.%) 3.10 0.079 3.07 3.13 4-Acid Digestion
Au, Gold (ppm) 1.16 0.053 1.14 1.19 Pb Fire Assay
S, Sulphur (wt.%) 13.29 0.286 13.17 13.41 Infrared Combustion
Ag, Silver (ppm) 46.1 4.29 41.8 50.4 Borate / Peroxide Fusion ICP
Al, Aluminium (wt.%) 4.32 0.152 4.24 4.41 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 115 9 108 121 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 1070 49 1032 1108 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 21.3 1.36 20.0 22.6 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 1.49 0.071 1.45 1.53 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) 133 9 124 141 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 32.9 1.70 30.8 35.1 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 273 10 267 279 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) < 50 IND IND IND Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 1.32 0.18 1.12 1.52 Borate / Peroxide Fusion ICP
Cu, Copper (wt.%) 3.08 0.154 3.00 3.16 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 16.31 0.550 16.03 16.59 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 22.1 1.44 20.6 23.6 Borate / Peroxide Fusion ICP
In, Indium (ppm) 4.14 0.42 3.76 4.53 Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 0.991 0.090 0.941 1.041 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 17.3 2.0 14.6 20.0 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 10.3 0.73 9.7 10.9 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 1.31 0.064 1.27 1.35 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.066 0.005 0.064 0.068 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 17.8 2.0 16.3 19.3 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 5.78 0.95 4.63 6.92 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 16.8 1.30 15.2 18.5 Borate / Peroxide Fusion ICP
Ni, Nickel (ppm) < 20.0 IND IND IND Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) < 0.100 IND IND IND Borate / Peroxide Fusion ICP
Pb, Lead (wt.%) 0.612 0.034 0.592 0.632 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 4.27 0.303 3.91 4.64 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 33.0 1.86 31.2 34.9 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 13.18 0.556 12.83 13.52 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 72 7 65 78 Borate / Peroxide Fusion ICP
Sc, Scandium (ppm) < 10.0 IND IND IND Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 20.47 0.636 20.13 20.82 Borate / Peroxide Fusion ICP
Sn, Tin (ppm) < 50 IND IND IND Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 47.6 7.5 41.9 53.3 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 4.12 0.212 3.95 4.30 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.146 0.006 0.143 0.148 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 0.94 0.14 0.82 1.07 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 1.34 0.115 1.27 1.41 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 43.3 6.6 36.9 49.7 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 4.58 0.53 3.99 5.18 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 17.3 1.46 15.8 18.7 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 1.94 0.158 1.80 2.08 Borate / Peroxide Fusion ICP
Zn, Zinc (wt.%) 2.41 0.093 2.36 2.46 Borate / Peroxide Fusion ICP
Ag, Silver (ppm) 45.3 1.26 44.7 45.8 4-Acid Digestion
Al, Aluminium (wt.%) 4.20 0.227 4.10 4.30 4-Acid Digestion
As, Arsenic (ppm) 109 9 105 112 4-Acid Digestion
Be, Beryllium (ppm) 0.76 0.071 0.72 0.80 4-Acid Digestion
Bi, Bismuth (ppm) 22.3 3.5 20.9 23.7 4-Acid Digestion
Ca, Calcium (wt.%) 1.49 0.078 1.45 1.52 4-Acid Digestion
Cd, Cadmium (ppm) 132 7 129 136 4-Acid Digestion
Ce, Cerium (ppm) 29.0 2.69 27.0 30.9 4-Acid Digestion
Co, Cobalt (ppm) 269 11 264 274 4-Acid Digestion
Cr, Chromium (ppm) 29.0 2.67 27.8 30.2 4-Acid Digestion
Cs, Caesium (ppm) 1.20 0.058 1.15 1.24 4-Acid Digestion
Fe, Iron (wt.%) 16.21 1.094 15.72 16.71 4-Acid Digestion
Ga, Gallium (ppm) 21.0 2.04 19.5 22.6 4-Acid Digestion
Hf, Hafnium (ppm) 2.85 0.278 2.66 3.04 4-Acid Digestion
In, Indium (ppm) 4.05 0.137 3.97 4.13 4-Acid Digestion
K, Potassium (wt.%) 0.926 0.062 0.899 0.952 4-Acid Digestion
La, Lanthanum (ppm) 13.5 2.4 11.9 15.1 4-Acid Digestion
Li, Lithium (ppm) 10.3 1.2 9.6 11.0 4-Acid Digestion
Lu, Lutetium (ppm) 0.27 0.023 0.25 0.29 4-Acid Digestion
Mg, Magnesium (wt.%) 1.26 0.078 1.23 1.30 4-Acid Digestion
Mn, Manganese (wt.%) 0.066 0.004 0.064 0.067 4-Acid Digestion
Mo, Molybdenum (ppm) 16.3 2.6 15.4 17.1 4-Acid Digestion
Na, Sodium (wt.%) 0.475 0.038 0.457 0.492 4-Acid Digestion
Nb, Niobium (ppm) 4.34 0.46 4.07 4.61 4-Acid Digestion
Ni, Nickel (ppm) 17.5 3.3 16.3 18.8 4-Acid Digestion
P, Phosphorus (wt.%) 0.055 0.006 0.052 0.057 4-Acid Digestion
Pb, Lead (wt.%) 0.624 0.019 0.616 0.632 4-Acid Digestion
Rb, Rubidium (ppm) 32.3 1.70 31.1 33.5 4-Acid Digestion
S, Sulphur (wt.%) 13.09 0.638 12.55 13.62 4-Acid Digestion
Sb, Antimony (ppm) 67 7 64 70 4-Acid Digestion
Sc, Scandium (ppm) 8.48 1.39 7.83 9.14 4-Acid Digestion
Se, Selenium (ppm) 30.1 3.6 27.8 32.4 4-Acid Digestion
Sn, Tin (ppm) 7.95 0.552 7.62 8.29 4-Acid Digestion
Sr, Strontium (ppm) 37.7 3.76 36.0 39.4 4-Acid Digestion
Ta, Tantalum (ppm) 0.50 IND IND IND 4-Acid Digestion
Tb, Terbium (ppm) 0.39 0.06 0.33 0.44 4-Acid Digestion
Te, Tellurium (ppm) 0.75 0.10 0.70 0.80 4-Acid Digestion
Th, Thorium (ppm) 3.61 0.38 3.35 3.87 4-Acid Digestion
Ti, Titanium (wt.%) 0.118 0.017 0.110 0.126 4-Acid Digestion
Tl, Thallium (ppm) 1.01 0.11 0.93 1.08 4-Acid Digestion
U, Uranium (ppm) 1.31 0.047 1.28 1.34 4-Acid Digestion
V, Vanadium (ppm) 30.4 3.5 28.9 32.0 4-Acid Digestion
W, Tungsten (ppm) 4.37 0.356 4.12 4.61 4-Acid Digestion
Y, Yttrium (ppm) 11.6 0.91 11.0 12.1 4-Acid Digestion
Yb, Ytterbium (ppm) 1.59 0.076 1.52 1.66 4-Acid Digestion
Zr, Zirconium (ppm) 107 4 104 110 4-Acid Digestion
Ag, Silver (ppm) 45.4 1.27 44.4 46.4 3-Acid Digestion (no HF)
As, Arsenic (ppm) 111 9 103 118 3-Acid Digestion (no HF)
Cu, Copper (wt.%) 3.10 0.089 3.04 3.16 3-Acid Digestion (no HF)
Fe, Iron (wt.%) 16.30 0.280 16.11 16.50 3-Acid Digestion (no HF)
Mo, Molybdenum (ppm) 15.2 2.4 14.2 16.3 3-Acid Digestion (no HF)
Pb, Lead (wt.%) 0.624 0.019 0.610 0.639 3-Acid Digestion (no HF)
Zn, Zinc (wt.%) 2.37 0.086 2.31 2.43 3-Acid Digestion (no HF)
Ag, Silver (ppm) 45.0 1.68 44.2 45.7 Aqua Regia Digestion
Al, Aluminium (wt.%) 2.06 0.102 2.01 2.11 Aqua Regia Digestion
As, Arsenic (ppm) 108 10 105 112 Aqua Regia Digestion
Au, Gold (ppm) 1.12 0.042 1.10 1.14 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) < 1.00 IND IND IND Aqua Regia Digestion
Bi, Bismuth (ppm) 20.5 3.6 19.6 21.4 Aqua Regia Digestion
Ca, Calcium (wt.%) 1.31 0.059 1.29 1.34 Aqua Regia Digestion
Cd, Cadmium (ppm) 125 12 119 131 Aqua Regia Digestion
Ce, Cerium (ppm) 24.0 4.1 21.2 26.9 Aqua Regia Digestion
Co, Cobalt (ppm) 265 13 259 271 Aqua Regia Digestion
Cr, Chromium (ppm) 19.8 2.6 18.6 21.0 Aqua Regia Digestion
Cs, Caesium (ppm) 0.43 0.07 0.37 0.49 Aqua Regia Digestion
Cu, Copper (wt.%) 3.09 0.090 3.05 3.13 Aqua Regia Digestion
Fe, Iron (wt.%) 16.14 0.652 15.80 16.48 Aqua Regia Digestion
Ga, Gallium (ppm) 14.0 1.38 13.2 14.7 Aqua Regia Digestion
Hf, Hafnium (ppm) 1.14 0.15 1.02 1.26 Aqua Regia Digestion
Hg, Mercury (ppm) 1.89 0.28 1.78 2.00 Aqua Regia Digestion
In, Indium (ppm) 3.62 0.257 3.43 3.82 Aqua Regia Digestion
K, Potassium (wt.%) 0.148 0.022 0.137 0.158 Aqua Regia Digestion
La, Lanthanum (ppm) 11.2 1.8 10.1 12.3 Aqua Regia Digestion
Li, Lithium (ppm) 7.65 0.651 7.05 8.25 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.13 0.012 0.12 0.14 Aqua Regia Digestion
Mg, Magnesium (wt.%) 1.19 0.067 1.16 1.22 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.062 0.004 0.060 0.064 Aqua Regia Digestion
Mo, Molybdenum (ppm) 14.2 2.1 13.3 15.1 Aqua Regia Digestion
Na, Sodium (wt.%) 0.076 0.011 0.070 0.081 Aqua Regia Digestion
Nb, Niobium (ppm) 0.43 0.09 0.36 0.51 Aqua Regia Digestion
Ni, Nickel (ppm) 17.5 1.71 16.8 18.1 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.052 0.003 0.051 0.053 Aqua Regia Digestion
Pb, Lead (wt.%) 0.629 0.017 0.620 0.637 Aqua Regia Digestion
Rb, Rubidium (ppm) 5.40 1.05 4.36 6.44 Aqua Regia Digestion
S, Sulphur (wt.%) 10.80 1.277 9.55 12.06 Aqua Regia Digestion
Sb, Antimony (ppm) < 60 IND IND IND Aqua Regia Digestion
Sc, Scandium (ppm) 4.83 0.59 4.55 5.11 Aqua Regia Digestion
Se, Selenium (ppm) 29.7 3.6 27.4 31.9 Aqua Regia Digestion
Sn, Tin (ppm) 6.04 0.347 5.75 6.33 Aqua Regia Digestion
Sr, Strontium (ppm) 11.2 1.3 10.7 11.8 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.050 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.29 0.017 0.27 0.30 Aqua Regia Digestion
Te, Tellurium (ppm) 0.76 0.10 0.71 0.82 Aqua Regia Digestion
Th, Thorium (ppm) 2.90 0.162 2.79 3.01 Aqua Regia Digestion
Ti, Titanium (wt.%) < 0.050 IND IND IND Aqua Regia Digestion
Tl, Thallium (ppm) 0.45 0.05 0.41 0.48 Aqua Regia Digestion
U, Uranium (ppm) 0.74 0.044 0.71 0.77 Aqua Regia Digestion
V, Vanadium (ppm) 17.8 1.9 16.9 18.7 Aqua Regia Digestion
W, Tungsten (ppm) 2.73 0.39 2.47 3.00 Aqua Regia Digestion
Y, Yttrium (ppm) 6.59 0.95 5.88 7.30 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.84 0.11 0.75 0.93 Aqua Regia Digestion
Zn, Zinc (wt.%) 2.40 0.093 2.35 2.44 Aqua Regia Digestion
Zr, Zirconium (ppm) 45.1 2.45 43.2 47.0 Aqua Regia Digestion
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