OREAS 523

OREAS 523 was prepared from a blend of iron oxide copper-gold ore, Cu-Au concentrate and magnetite-bearing waste rock (altered, porphyritic, intermediate volcanic rock). The mineralisation is hosted by a breccia comprising strongly altered and replaced felsic volcanic fragments in a matrix largely composed of magnetite, calcite, pyrite, biotite, chalcopyrite, K feldspar titanite and quartz. Accessory minerals include garnet, barite, molybdenite, fluorite, amphibole, apatite, monazite, arsenopyrite, a LREE fluorcarbonate, galena, cobaltite, sphalerite, scheelite, uraninite and tourmaline. Copper occurs as native copper, bornite and chalcopyrite. Gold occurs mainly in the molecular framework of the chalcopyrite. Significant levels of cobalt, molybdenum, rare earth elements and low levels of uranium are also present. The ore, concentrate and waste materials were sourced from the Ernest Henry Mine located about 38 kilometres north-east of Cloncurry in north-west Queensland.

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Cu, Copper (wt.%) 1.72 0.038 1.70 1.73 4-Acid Digestion
Au, Gold (ppm) 1.04 0.027 1.03 1.05 Pb Fire Assay
Co, Cobalt (ppm) 728 28 716 740 4-Acid Digestion
Al, Aluminium (wt.%) 3.06 0.087 3.01 3.10 Peroxide Fusion ICP
As, Arsenic (ppm) 687 42 668 706 Peroxide Fusion ICP
Bi, Bismuth (ppm) 14.3 1.18 13.4 15.1 Peroxide Fusion ICP
Ca, Calcium (wt.%) 3.55 0.154 3.47 3.62 Peroxide Fusion ICP
Ce, Cerium (ppm) 203 8 197 208 Peroxide Fusion ICP
Co, Cobalt (ppm) 734 40 713 754 Peroxide Fusion ICP
Cr, Chromium (ppm) 26.2 3.6 24.6 27.8 Peroxide Fusion ICP
Cs, Caesium (ppm) 0.61 0.07 0.57 0.64 Peroxide Fusion ICP
Cu, Copper (wt.%) 1.72 0.029 1.70 1.73 Peroxide Fusion ICP
Dy, Dysprosium (ppm) 3.27 0.202 3.13 3.41 Peroxide Fusion ICP
Er, Erbium (ppm) 1.96 0.121 1.88 2.04 Peroxide Fusion ICP
Fe, Iron (wt.%) 28.76 0.947 28.31 29.21 Peroxide Fusion ICP
Ga, Gallium (ppm) 14.8 0.74 14.4 15.1 Peroxide Fusion ICP
Gd, Gadolinium (ppm) 4.13 0.329 3.81 4.44 Peroxide Fusion ICP
Hf, Hafnium (ppm) 3.04 0.47 2.53 3.56 Peroxide Fusion ICP
Ho, Holmium (ppm) 0.68 0.052 0.64 0.71 Peroxide Fusion ICP
In, Indium (ppm) 0.38 0.05 0.37 0.40 Peroxide Fusion ICP
K, Potassium (wt.%) 2.62 0.123 2.55 2.68 Peroxide Fusion ICP
La, Lanthanum (ppm) 283 8 277 289 Peroxide Fusion ICP
Li, Lithium (ppm) 16.0 3.1 13.5 18.5 Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.33 0.05 0.29 0.37 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 1.05 0.043 1.03 1.07 Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.497 0.020 0.488 0.507 Peroxide Fusion ICP
Mo, Molybdenum (ppm) 316 23 299 333 Peroxide Fusion ICP
Nb, Niobium (ppm) 5.40 0.80 4.82 5.98 Peroxide Fusion ICP
Nd, Neodymium (ppm) 32.4 1.88 31.1 33.8 Peroxide Fusion ICP
Ni, Nickel (ppm) 73 13 67 80 Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.096 0.008 0.090 0.102 Peroxide Fusion ICP
Pr, Praseodymium (ppm) 12.5 0.71 12.0 13.1 Peroxide Fusion ICP
Rb, Rubidium (ppm) 70 2.6 69 72 Peroxide Fusion ICP
S, Sulphur (wt.%) 4.63 0.108 4.56 4.70 Peroxide Fusion ICP
Sb, Antimony (ppm) 11.0 0.90 10.4 11.6 Peroxide Fusion ICP
Si, Silicon (wt.%) 13.23 0.557 12.91 13.55 Peroxide Fusion ICP
Sm, Samarium (ppm) 4.41 0.377 4.11 4.71 Peroxide Fusion ICP
Sn, Tin (ppm) 13.4 2.4 11.6 15.2 Peroxide Fusion ICP
Sr, Strontium (ppm) 289 10 282 296 Peroxide Fusion ICP
Tb, Terbium (ppm) 0.56 0.08 0.51 0.61 Peroxide Fusion ICP
Th, Thorium (ppm) 8.21 0.426 7.98 8.44 Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.302 0.011 0.297 0.307 Peroxide Fusion ICP
Tm, Thulium (ppm) 0.29 0.03 0.26 0.31 Peroxide Fusion ICP
U, Uranium (ppm) 58 3.5 56 60 Peroxide Fusion ICP
V, Vanadium (ppm) 123 14 113 132 Peroxide Fusion ICP
W, Tungsten (ppm) 178 16 168 189 Peroxide Fusion ICP
Y, Yttrium (ppm) 18.1 1.08 17.3 18.8 Peroxide Fusion ICP
Yb, Ytterbium (ppm) 1.98 0.143 1.89 2.06 Peroxide Fusion ICP
Zn, Zinc (ppm) 48.1 9.6 41.0 55.1 Peroxide Fusion ICP
Zr, Zirconium (ppm) 100 8.2 89 110 Peroxide Fusion ICP
Ag, Silver (ppm) 2.61 0.223 2.51 2.70 4-Acid Digestion
Al, Aluminium (wt.%) 3.02 0.099 2.98 3.07 4-Acid Digestion
As, Arsenic (ppm) 666 38 647 684 4-Acid Digestion
Be, Beryllium (ppm) 0.53 0.08 0.48 0.57 4-Acid Digestion
Bi, Bismuth (ppm) 13.6 0.87 13.3 13.9 4-Acid Digestion
Ca, Calcium (wt.%) 3.36 0.126 3.31 3.41 4-Acid Digestion
Ce, Cerium (ppm) 172 18 163 182 4-Acid Digestion
Cr, Chromium (ppm) 25.0 2.8 23.6 26.4 4-Acid Digestion
Cs, Caesium (ppm) 0.57 0.054 0.54 0.60 4-Acid Digestion
Dy, Dysprosium (ppm) 2.99 0.192 2.86 3.13 4-Acid Digestion
Er, Erbium (ppm) 1.83 0.080 1.78 1.88 4-Acid Digestion
Eu, Europium (ppm) 2.13 0.086 2.07 2.18 4-Acid Digestion
Fe, Iron (wt.%) 28.90 1.402 28.23 29.57 4-Acid Digestion
Ga, Gallium (ppm) 14.3 1.22 13.6 14.9 4-Acid Digestion
Gd, Gadolinium (ppm) 3.84 0.51 3.44 4.25 4-Acid Digestion
Hf, Hafnium (ppm) 2.66 0.132 2.60 2.73 4-Acid Digestion
Ho, Holmium (ppm) 0.62 0.043 0.59 0.64 4-Acid Digestion
In, Indium (ppm) 0.37 0.036 0.35 0.39 4-Acid Digestion
K, Potassium (wt.%) 2.57 0.090 2.53 2.61 4-Acid Digestion
Li, Lithium (ppm) 15.5 1.52 14.8 16.2 4-Acid Digestion
Lu, Lutetium (ppm) 0.29 0.017 0.28 0.30 4-Acid Digestion
Mg, Magnesium (wt.%) 1.02 0.065 0.99 1.05 4-Acid Digestion
Mn, Manganese (wt.%) 0.475 0.032 0.461 0.489 4-Acid Digestion
Mo, Molybdenum (ppm) 313 19 304 321 4-Acid Digestion
Na, Sodium (wt.%) 0.239 0.015 0.232 0.246 4-Acid Digestion
Nb, Niobium (ppm) 5.40 0.339 5.23 5.57 4-Acid Digestion
Nd, Neodymium (ppm) 30.6 0.90 29.9 31.2 4-Acid Digestion
Ni, Nickel (ppm) 68 4.1 66 70 4-Acid Digestion
P, Phosphorus (wt.%) 0.092 0.009 0.088 0.096 4-Acid Digestion
Pb, Lead (ppm) 26.3 2.7 24.9 27.8 4-Acid Digestion
Pr, Praseodymium (ppm) 11.1 0.89 10.5 11.8 4-Acid Digestion
Rb, Rubidium (ppm) 68 3.4 67 70 4-Acid Digestion
Re, Rhenium (ppm) 0.15 0.009 0.14 0.15 4-Acid Digestion
S, Sulphur (wt.%) 3.82 0.149 3.75 3.89 4-Acid Digestion
Sb, Antimony (ppm) 10.5 0.39 10.3 10.7 4-Acid Digestion
Sc, Scandium (ppm) 7.42 0.83 7.06 7.78 4-Acid Digestion
Se, Selenium (ppm) 3.66 0.60 3.38 3.94 4-Acid Digestion
Sm, Samarium (ppm) 4.03 0.329 3.80 4.26 4-Acid Digestion
Sn, Tin (ppm) 11.6 0.39 11.5 11.8 4-Acid Digestion
Sr, Strontium (ppm) 216 35 200 233 4-Acid Digestion
Ta, Tantalum (ppm) 0.43 0.06 0.41 0.46 4-Acid Digestion
Tb, Terbium (ppm) 0.54 0.054 0.51 0.57 4-Acid Digestion
Te, Tellurium (ppm) 1.63 0.131 1.56 1.70 4-Acid Digestion
Th, Thorium (ppm) 6.44 0.92 5.92 6.96 4-Acid Digestion
Ti, Titanium (wt.%) 0.283 0.010 0.279 0.287 4-Acid Digestion
Tl, Thallium (ppm) 0.30 0.016 0.30 0.31 4-Acid Digestion
Tm, Thulium (ppm) 0.26 0.012 0.25 0.27 4-Acid Digestion
U, Uranium (ppm) 57 2.8 55 58 4-Acid Digestion
V, Vanadium (ppm) 113 5 111 115 4-Acid Digestion
W, Tungsten (ppm) 179 15 172 186 4-Acid Digestion
Y, Yttrium (ppm) 17.1 0.95 16.7 17.5 4-Acid Digestion
Yb, Ytterbium (ppm) 1.86 0.114 1.80 1.93 4-Acid Digestion
Zn, Zinc (ppm) 40.2 5.6 37.7 42.8 4-Acid Digestion
Zr, Zirconium (ppm) 100 5 98 103 4-Acid Digestion
Ag, Silver (ppm) 2.29 0.37 2.08 2.51 3-Acid Digestion (no HF)
As, Arsenic (ppm) 657 41 633 681 3-Acid Digestion (no HF)
Co, Cobalt (ppm) 715 31 696 734 3-Acid Digestion (no HF)
Cu, Copper (wt.%) 1.69 0.058 1.65 1.72 3-Acid Digestion (no HF)
Fe, Iron (wt.%) 28.84 0.318 28.69 28.99 3-Acid Digestion (no HF)
Mo, Molybdenum (ppm) 294 16 286 303 3-Acid Digestion (no HF)
S, Sulphur (wt.%) 3.99 0.262 3.80 4.18 3-Acid Digestion (no HF)
Ag, Silver (ppm) 2.36 0.217 2.22 2.49 Aqua Regia Digestion
Al, Aluminium (wt.%) 1.15 0.065 1.10 1.19 Aqua Regia Digestion
As, Arsenic (ppm) 665 27 647 683 Aqua Regia Digestion
Au, Gold (ppm) 1.01 0.054 0.98 1.03 Aqua Regia Digestion
Be, Beryllium (ppm) 0.34 0.05 0.30 0.37 Aqua Regia Digestion
Bi, Bismuth (ppm) 13.5 0.68 13.0 14.0 Aqua Regia Digestion
Ca, Calcium (wt.%) 3.20 0.108 3.13 3.27 Aqua Regia Digestion
Ce, Cerium (ppm) 188 11 180 196 Aqua Regia Digestion
Co, Cobalt (ppm) 698 47 669 728 Aqua Regia Digestion
Cr, Chromium (ppm) 24.9 2.41 23.3 26.5 Aqua Regia Digestion
Cs, Caesium (ppm) 0.48 0.045 0.44 0.52 Aqua Regia Digestion
Cu, Copper (wt.%) 1.68 0.058 1.65 1.72 Aqua Regia Digestion
Fe, Iron (wt.%) 28.05 1.071 27.37 28.73 Aqua Regia Digestion
Ga, Gallium (ppm) 12.3 1.5 11.2 13.4 Aqua Regia Digestion
Hf, Hafnium (ppm) 1.32 0.095 1.24 1.40 Aqua Regia Digestion
In, Indium (ppm) 0.38 0.020 0.36 0.40 Aqua Regia Digestion
K, Potassium (wt.%) 0.615 0.088 0.554 0.675 Aqua Regia Digestion
La, Lanthanum (ppm) 233 19 219 246 Aqua Regia Digestion
Li, Lithium (ppm) 16.2 2.0 14.8 17.6 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.24 0.019 0.21 0.27 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.992 0.064 0.949 1.036 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.437 0.023 0.420 0.453 Aqua Regia Digestion
Mo, Molybdenum (ppm) 293 23 277 310 Aqua Regia Digestion
Nb, Niobium (ppm) 1.56 0.111 1.46 1.65 Aqua Regia Digestion
Ni, Nickel (ppm) 62 3.9 60 65 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.090 0.003 0.088 0.092 Aqua Regia Digestion
Pb, Lead (ppm) 27.4 3.9 24.0 30.8 Aqua Regia Digestion
Rb, Rubidium (ppm) 30.5 1.96 28.6 32.5 Aqua Regia Digestion
S, Sulphur (wt.%) 3.84 0.153 3.74 3.95 Aqua Regia Digestion
Sc, Scandium (ppm) 6.41 0.82 5.86 6.97 Aqua Regia Digestion
Se, Selenium (ppm) 4.35 0.59 3.87 4.84 Aqua Regia Digestion
Sn, Tin (ppm) 9.88 0.231 9.74 10.02 Aqua Regia Digestion
Sr, Strontium (ppm) 62 11 55 70 Aqua Regia Digestion
Tb, Terbium (ppm) 0.55 0.050 0.48 0.61 Aqua Regia Digestion
Te, Tellurium (ppm) 1.65 0.080 1.58 1.72 Aqua Regia Digestion
Th, Thorium (ppm) 6.90 0.642 6.40 7.40 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.158 0.017 0.144 0.171 Aqua Regia Digestion
Tl, Thallium (ppm) 0.16 0.013 0.15 0.18 Aqua Regia Digestion
U, Uranium (ppm) 53 2.2 51 55 Aqua Regia Digestion
V, Vanadium (ppm) 110 5 107 114 Aqua Regia Digestion
W, Tungsten (ppm) 160 10 152 168 Aqua Regia Digestion
Y, Yttrium (ppm) 14.8 1.25 13.9 15.8 Aqua Regia Digestion
Yb, Ytterbium (ppm) 1.61 0.17 1.39 1.83 Aqua Regia Digestion
Zn, Zinc (ppm) 38.1 2.24 36.9 39.3 Aqua Regia Digestion
Zr, Zirconium (ppm) 49.0 5.2 45.2 52.8 Aqua Regia Digestion
S, Sulphur (wt.%) 4.64 0.119 4.59 4.70 Infrared Combustion
SG, Specific Gravity (Unity) 3.44 0.062 3.41 3.48 Gas / Liquid Pycnometry
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