OREAS 603c

OREAS 603c was prepared from a blend of silver-copper-gold bearing ores from Evolution Mining’s Mount Carlton Operation in Queensland, Australia and barren rhyodacite rock sourced from a quarry east of Melbourne, Australia. Small quantities of copper-silver concentrate (from Rosebery, Tasmania) and copper-gold concentrate (from Mount Carlton) were added to help achieve the desired grades.

The mineralisation assemblage at Mount Carlton consists of pyrite, enargite/tennantite, tetrahedrite, digenite, covellite, sphalerite, galena, alunite, dickite, kaolinite and vuggy silica, hosted in argillic altered rhyodacite containing sulphur-salts.

The certification program includes:

  • Au by fire assay with AAS or ICP finish
  • Au by aqua regia digestion with AAS or ICP finish
  • Ag by fire assay with gravimetric finish for samples >100ppm Ag
  • Full ICP-OES and MS elemental suites by 4-acid digestion
  • Full ICP-OES and MS elemental suites by aqua regia digestion
  • Total S by Infrared combustion furnace

Indicative values for Sulphate Sulphur and Sulphide Sulphur (among others) are also available.

Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Au, Gold (ppm) 4.96 0.186 4.89 5.02 Pb Fire Assay
Ag, Silver (ppm) 294 13 286 303 4-Acid Digestion
Cu, Copper (wt.%) 1.21 0.032 1.18 1.25 4-Acid Digestion
Ag, Silver (ppm) 275 15 263 286 Pb Fire Assay (Grav)
Au, Gold (ppm) 5.01 0.224 4.89 5.14 Aqua Regia Digestion (sample weights 10-50g)
S, Sulphur (wt.%) 3.67 0.133 3.59 3.74 Infrared Combustion
Al, Aluminium (wt.%) 6.46 0.208 6.29 6.63 4-Acid Digestion
As, Arsenic (wt.%) 0.156 0.007 0.151 0.161 4-Acid Digestion
Be, Beryllium (ppm) 2.28 0.156 2.04 2.53 4-Acid Digestion
Bi, Bismuth (ppm) 89 5.4 85 94 4-Acid Digestion
Ca, Calcium (wt.%) 0.977 0.044 0.937 1.018 4-Acid Digestion
Cd, Cadmium (ppm) 31.4 1.70 30.0 32.7 4-Acid Digestion
Ce, Cerium (ppm) 68 4.1 63 73 4-Acid Digestion
Co, Cobalt (ppm) 14.9 0.59 14.2 15.6 4-Acid Digestion
Cr, Chromium (ppm) 19.4 3.0 17.1 21.6 4-Acid Digestion
Cs, Caesium (ppm) 4.81 0.278 4.56 5.06 4-Acid Digestion
Dy, Dysprosium (ppm) 2.76 0.123 2.60 2.92 4-Acid Digestion
Er, Erbium (ppm) 0.83 0.10 0.75 0.91 4-Acid Digestion
Eu, Europium (ppm) 1.19 0.14 1.05 1.32 4-Acid Digestion
Fe, Iron (wt.%) 4.18 0.109 4.07 4.28 4-Acid Digestion
Ga, Gallium (ppm) 23.3 1.67 21.9 24.7 4-Acid Digestion
Gd, Gadolinium (ppm) 4.64 0.262 4.20 5.08 4-Acid Digestion
Ge, Germanium (ppm) 0.16 0.04 0.10 0.23 4-Acid Digestion
Hf, Hafnium (ppm) 4.87 0.341 4.62 5.12 4-Acid Digestion
Ho, Holmium (ppm) 0.36 0.04 0.32 0.40 4-Acid Digestion
In, Indium (ppm) 4.04 0.302 3.84 4.24 4-Acid Digestion
K, Potassium (wt.%) 2.34 0.081 2.26 2.42 4-Acid Digestion
La, Lanthanum (ppm) 31.7 3.8 29.0 34.5 4-Acid Digestion
Li, Lithium (ppm) 27.6 1.58 26.2 28.9 4-Acid Digestion
Lu, Lutetium (ppm) 0.078 0.008 0.062 0.094 4-Acid Digestion
Mg, Magnesium (wt.%) 0.162 0.012 0.153 0.170 4-Acid Digestion
Mn, Manganese (wt.%) 0.066 0.002 0.064 0.067 4-Acid Digestion
Mo, Molybdenum (ppm) 60 4.1 58 63 4-Acid Digestion
Na, Sodium (wt.%) 1.80 0.064 1.74 1.86 4-Acid Digestion
Nb, Niobium (ppm) 13.6 1.07 12.8 14.3 4-Acid Digestion
Nd, Neodymium (ppm) 28.2 2.9 26.0 30.5 4-Acid Digestion
Ni, Nickel (ppm) 26.9 2.01 25.5 28.3 4-Acid Digestion
P, Phosphorus (wt.%) 0.043 0.003 0.041 0.044 4-Acid Digestion
Pb, Lead (ppm) 10428 461 10124 10731 4-Acid Digestion
Pr, Praseodymium (ppm) 7.91 0.495 7.46 8.37 4-Acid Digestion
Rb, Rubidium (ppm) 107 9 101 113 4-Acid Digestion
Re, Rhenium (ppm) 0.035 0.005 0.031 0.040 4-Acid Digestion
S, Sulphur (wt.%) 3.59 0.208 3.48 3.71 4-Acid Digestion
Sb, Antimony (ppm) 396 36 377 415 4-Acid Digestion
Sc, Scandium (ppm) 4.14 0.245 3.93 4.35 4-Acid Digestion
Se, Selenium (ppm) 29.6 1.77 28.1 31.0 4-Acid Digestion
Sm, Samarium (ppm) 5.90 0.438 5.50 6.31 4-Acid Digestion
Sn, Tin (ppm) 12.1 0.99 11.3 12.8 4-Acid Digestion
Sr, Strontium (ppm) 270 21 259 281 4-Acid Digestion
Ta, Tantalum (ppm) 1.04 0.104 0.97 1.11 4-Acid Digestion
Tb, Terbium (ppm) 0.55 0.06 0.51 0.60 4-Acid Digestion
Te, Tellurium (ppm) 23.8 2.29 22.5 25.2 4-Acid Digestion
Th, Thorium (ppm) 11.4 1.3 10.5 12.2 4-Acid Digestion
Ti, Titanium (wt.%) 0.142 0.004 0.137 0.147 4-Acid Digestion
Tl, Thallium (ppm) 4.18 0.372 3.97 4.38 4-Acid Digestion
Tm, Thulium (ppm) 0.095 0.007 0.082 0.109 4-Acid Digestion
U, Uranium (ppm) 4.42 0.327 4.22 4.62 4-Acid Digestion
V, Vanadium (ppm) 18.6 1.86 17.6 19.7 4-Acid Digestion
W, Tungsten (ppm) 8.99 0.709 8.51 9.46 4-Acid Digestion
Y, Yttrium (ppm) 11.6 0.41 11.2 12.0 4-Acid Digestion
Yb, Ytterbium (ppm) 0.58 0.08 0.51 0.65 4-Acid Digestion
Zn, Zinc (wt.%) 0.803 0.037 0.773 0.832 4-Acid Digestion
Zr, Zirconium (ppm) 177 8 171 183 4-Acid Digestion
Ag, Silver (ppm) 296 6 288 304 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.724 0.079 0.678 0.770 Aqua Regia Digestion
As, Arsenic (wt.%) 0.153 0.008 0.149 0.158 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) 0.61 0.09 0.52 0.69 Aqua Regia Digestion
Bi, Bismuth (ppm) 90 5.7 86 93 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.795 0.049 0.768 0.823 Aqua Regia Digestion
Cd, Cadmium (ppm) 30.4 1.34 29.6 31.3 Aqua Regia Digestion
Ce, Cerium (ppm) 30.7 5.5 27.4 34.1 Aqua Regia Digestion
Co, Cobalt (ppm) 14.1 0.98 13.4 14.7 Aqua Regia Digestion
Cr, Chromium (ppm) 16.6 1.32 15.6 17.5 Aqua Regia Digestion
Cs, Caesium (ppm) 1.29 0.103 1.21 1.37 Aqua Regia Digestion
Cu, Copper (wt.%) 1.20 0.043 1.16 1.23 Aqua Regia Digestion
Dy, Dysprosium (ppm) 1.45 0.132 1.32 1.57 Aqua Regia Digestion
Er, Erbium (ppm) 0.42 0.033 0.37 0.46 Aqua Regia Digestion
Eu, Europium (ppm) 0.58 0.054 0.50 0.66 Aqua Regia Digestion
Fe, Iron (wt.%) 3.64 0.158 3.54 3.75 Aqua Regia Digestion
Ga, Gallium (ppm) 5.40 0.87 4.92 5.89 Aqua Regia Digestion
Gd, Gadolinium (ppm) 2.37 0.169 2.16 2.57 Aqua Regia Digestion
Ge, Germanium (ppm) 0.20 0.05 0.14 0.25 Aqua Regia Digestion
Hf, Hafnium (ppm) 1.16 0.14 1.07 1.25 Aqua Regia Digestion
Hg, Mercury (ppm) 1.35 0.131 1.24 1.46 Aqua Regia Digestion
Ho, Holmium (ppm) 0.21 0.010 0.19 0.22 Aqua Regia Digestion
In, Indium (ppm) 3.72 0.159 3.59 3.84 Aqua Regia Digestion
K, Potassium (wt.%) 0.254 0.028 0.238 0.270 Aqua Regia Digestion
La, Lanthanum (ppm) 14.6 3.3 12.8 16.4 Aqua Regia Digestion
Li, Lithium (ppm) 8.17 0.83 7.50 8.84 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.030 0.004 0.027 0.034 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.084 0.005 0.079 0.089 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.060 0.002 0.059 0.061 Aqua Regia Digestion
Mo, Molybdenum (ppm) 56 2.8 55 58 Aqua Regia Digestion
Na, Sodium (wt.%) 0.053 0.007 0.050 0.056 Aqua Regia Digestion
Nb, Niobium (ppm) 0.51 0.15 0.41 0.62 Aqua Regia Digestion
Nd, Neodymium (ppm) 13.4 1.7 11.5 15.2 Aqua Regia Digestion
Ni, Nickel (ppm) 25.8 1.24 24.8 26.7 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.024 0.002 0.023 0.025 Aqua Regia Digestion
Pb, Lead (ppm) 10228 252 9962 10494 Aqua Regia Digestion
Pr, Praseodymium (ppm) 3.60 0.59 2.99 4.21 Aqua Regia Digestion
Rb, Rubidium (ppm) 13.8 1.9 12.6 15.0 Aqua Regia Digestion
Re, Rhenium (ppm) 0.037 0.003 0.034 0.039 Aqua Regia Digestion
S, Sulphur (wt.%) 3.38 0.090 3.31 3.45 Aqua Regia Digestion
Sb, Antimony (ppm) 339 49 317 361 Aqua Regia Digestion
Sc, Scandium (ppm) 1.18 0.21 1.04 1.31 Aqua Regia Digestion
Se, Selenium (ppm) 28.8 1.82 27.3 30.3 Aqua Regia Digestion
Sm, Samarium (ppm) 2.83 0.34 2.40 3.26 Aqua Regia Digestion
Sn, Tin (ppm) 9.30 1.02 8.73 9.87 Aqua Regia Digestion
Sr, Strontium (ppm) 37.3 4.4 34.7 39.9 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.050 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.30 0.021 0.27 0.32 Aqua Regia Digestion
Te, Tellurium (ppm) 23.2 2.4 21.9 24.6 Aqua Regia Digestion
Th, Thorium (ppm) 5.44 0.79 4.97 5.92 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.011 0.002 0.009 0.012 Aqua Regia Digestion
Tl, Thallium (ppm) 3.68 0.319 3.49 3.87 Aqua Regia Digestion
U, Uranium (ppm) 2.19 0.165 2.07 2.31 Aqua Regia Digestion
V, Vanadium (ppm) 6.27 1.25 5.71 6.83 Aqua Regia Digestion
W, Tungsten (ppm) 2.99 0.39 2.71 3.27 Aqua Regia Digestion
Y, Yttrium (ppm) 5.55 0.458 5.26 5.84 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.22 0.02 0.20 0.24 Aqua Regia Digestion
Zn, Zinc (wt.%) 0.786 0.037 0.765 0.807 Aqua Regia Digestion
Zr, Zirconium (ppm) 42.7 6.1 39.4 45.9 Aqua Regia Digestion
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