OREAS 931c

OREAS 931c was prepared from material from the CSA mine located near the town of Cobar in central western New South Wales, Australia. The copper ore body is hosted by the Early Devonian CSA Siltstone, a thinly bedded turbiditic sequence of carbonaceous siltstones and mudstones with minor coarser units. The CSA Siltstone is part of the Cobar Supergroup, consisting of lower syn-rift sediments and upper post-rift sag phase sediments. The mineralisation is structurally controlled and confined to a number of steeply dipping bodies within a major shear zone on the eastern margin of the Early Devonian Cobar Basin. It is characterised by low-grade greenschist alteration and epigenetic low-grade mineralisation enveloping higher-grade shoots of vein complexes or sub-massive to massive sulphides. The sulphides include chalcopyrite, pyrrhotite, pyrite, sphalerite, galena, bornite and cubanite. Iron-rich chlorite and silica are prominent alterations in the siltstone host. The certification program includes:

  • 4-acid digestion with full suite elemental packages by ICP-OES and ICP-MS finish
  • Aqua regia digestion for full elemental suite by ICP-OES and ICP-MS finish
  • Lithium borate fusion whole rock analysis package by X-ray fluorescence finish
  • Thermogravimetry: Loss on Ignition (LOI) at 1000 °C
  • Lithium borate or sodium peroxide fusion with full suite elemental packages by ICP-OES and ICP-MS finish
  • C and S by infrared combustion furnace/CS analyser
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Cu, Copper (wt.%) 3.95 0.086 3.87 4.02 4-Acid Digestion
Ag, Silver (ppm) 15.3 0.64 14.9 15.7 4-Acid Digestion
Zn, Zinc (ppm) 286 6 279 293 4-Acid Digestion
Al, Aluminium (wt.%) 5.37 0.157 5.25 5.49 4-Acid Digestion
As, Arsenic (ppm) 53 2.9 51 54 4-Acid Digestion
Be, Beryllium (ppm) 1.93 0.068 1.86 2.00 4-Acid Digestion
Bi, Bismuth (ppm) 217 9 208 225 4-Acid Digestion
Ca, Calcium (wt.%) 0.081 0.003 0.080 0.083 4-Acid Digestion
Cd, Cadmium (ppm) 0.61 0.06 0.55 0.67 4-Acid Digestion
Ce, Cerium (ppm) 64 3.7 61 67 4-Acid Digestion
Co, Cobalt (ppm) 31.5 1.25 30.3 32.6 4-Acid Digestion
Cr, Chromium (ppm) 67 7 63 70 4-Acid Digestion
Cs, Caesium (ppm) 4.99 0.257 4.79 5.20 4-Acid Digestion
Dy, Dysprosium (ppm) 2.89 0.33 2.50 3.27 4-Acid Digestion
Er, Erbium (ppm) 1.44 0.120 1.29 1.59 4-Acid Digestion
Eu, Europium (ppm) 1.04 0.054 0.97 1.10 4-Acid Digestion
Fe, Iron (wt.%) 8.49 0.256 8.32 8.66 4-Acid Digestion
Ga, Gallium (ppm) 16.8 0.82 16.1 17.5 4-Acid Digestion
Gd, Gadolinium (ppm) 4.31 0.194 3.99 4.63 4-Acid Digestion
Ge, Germanium (ppm) 0.22 0.05 0.18 0.27 4-Acid Digestion
Hf, Hafnium (ppm) 1.96 0.140 1.85 2.07 4-Acid Digestion
Ho, Holmium (ppm) 0.52 0.029 0.47 0.57 4-Acid Digestion
In, Indium (ppm) 3.24 0.177 3.10 3.37 4-Acid Digestion
K, Potassium (wt.%) 2.14 0.051 2.09 2.19 4-Acid Digestion
La, Lanthanum (ppm) 33.0 3.9 31.0 35.0 4-Acid Digestion
Li, Lithium (ppm) 19.3 0.56 18.7 19.9 4-Acid Digestion
Lu, Lutetium (ppm) 0.22 0.019 0.19 0.25 4-Acid Digestion
Mg, Magnesium (wt.%) 0.363 0.016 0.354 0.373 4-Acid Digestion
Mn, Manganese (wt.%) 0.017 0.000 0.017 0.018 4-Acid Digestion
Mo, Molybdenum (ppm) 4.99 0.254 4.81 5.17 4-Acid Digestion
Na, Sodium (wt.%) 0.071 0.006 0.068 0.074 4-Acid Digestion
Nb, Niobium (ppm) 3.09 0.47 2.73 3.46 4-Acid Digestion
Nd, Neodymium (ppm) 30.6 1.48 29.1 32.1 4-Acid Digestion
Ni, Nickel (ppm) 11.8 0.66 11.1 12.5 4-Acid Digestion
P, Phosphorus (wt.%) 0.029 0.001 0.028 0.030 4-Acid Digestion
Pb, Lead (ppm) 127 5 123 130 4-Acid Digestion
Pr, Praseodymium (ppm) 8.04 0.559 7.48 8.59 4-Acid Digestion
Rb, Rubidium (ppm) 125 5 121 130 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) 4.29 0.174 4.20 4.38 4-Acid Digestion
Sb, Antimony (ppm) 3.74 0.309 3.54 3.95 4-Acid Digestion
Sc, Scandium (ppm) 9.89 0.603 9.38 10.39 4-Acid Digestion
Se, Selenium (ppm) 46.3 4.40 43.4 49.1 4-Acid Digestion
Sm, Samarium (ppm) 5.52 0.466 5.03 6.01 4-Acid Digestion
Sn, Tin (ppm) 37.3 1.92 35.8 38.7 4-Acid Digestion
Sr, Strontium (ppm) 39.1 2.36 37.6 40.7 4-Acid Digestion
Ta, Tantalum (ppm) 0.21 0.05 0.17 0.25 4-Acid Digestion
Tb, Terbium (ppm) 0.52 0.06 0.46 0.57 4-Acid Digestion
Te, Tellurium (ppm) 0.15 0.03 0.13 0.18 4-Acid Digestion
Th, Thorium (ppm) 10.6 1.1 10.0 11.2 4-Acid Digestion
Ti, Titanium (wt.%) 0.158 0.011 0.149 0.167 4-Acid Digestion
Tl, Thallium (ppm) 0.80 0.044 0.76 0.83 4-Acid Digestion
Tm, Thulium (ppm) 0.20 0.02 0.17 0.22 4-Acid Digestion
U, Uranium (ppm) 3.70 0.206 3.52 3.87 4-Acid Digestion
V, Vanadium (ppm) 158 8 154 162 4-Acid Digestion
W, Tungsten (ppm) 18.3 1.73 17.3 19.4 4-Acid Digestion
Y, Yttrium (ppm) 14.3 1.41 13.5 15.1 4-Acid Digestion
Yb, Ytterbium (ppm) 1.42 0.110 1.29 1.54 4-Acid Digestion
Zr, Zirconium (ppm) 68 4.2 65 71 4-Acid Digestion
Ag, Silver (ppm) 15.2 0.71 14.8 15.7 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.783 0.068 0.747 0.819 Aqua Regia Digestion
As, Arsenic (ppm) 52 3.6 50 54 Aqua Regia Digestion
Au, Gold (ppm) < 0.020 IND IND IND Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) 0.42 0.027 0.39 0.45 Aqua Regia Digestion
Bi, Bismuth (ppm) 212 13 203 221 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.078 0.004 0.077 0.080 Aqua Regia Digestion
Cd, Cadmium (ppm) 0.59 0.07 0.54 0.64 Aqua Regia Digestion
Ce, Cerium (ppm) 43.5 4.34 41.1 46.0 Aqua Regia Digestion
Co, Cobalt (ppm) 30.7 2.21 29.2 32.3 Aqua Regia Digestion
Cr, Chromium (ppm) 17.4 1.25 16.1 18.6 Aqua Regia Digestion
Cs, Caesium (ppm) 1.85 0.21 1.72 1.99 Aqua Regia Digestion
Cu, Copper (wt.%) 3.89 0.104 3.80 3.97 Aqua Regia Digestion
Fe, Iron (wt.%) 8.18 0.273 7.96 8.40 Aqua Regia Digestion
Ga, Gallium (ppm) 3.17 0.273 2.98 3.36 Aqua Regia Digestion
Ge, Germanium (ppm) 0.20 0.04 0.15 0.24 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.32 0.023 0.30 0.34 Aqua Regia Digestion
Hg, Mercury (ppm) 0.10 0.02 0.08 0.12 Aqua Regia Digestion
In, Indium (ppm) 3.15 0.188 3.01 3.28 Aqua Regia Digestion
K, Potassium (wt.%) 0.236 0.019 0.224 0.249 Aqua Regia Digestion
La, Lanthanum (ppm) 20.0 2.7 18.4 21.7 Aqua Regia Digestion
Li, Lithium (ppm) 2.40 0.32 2.13 2.66 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.132 0.011 0.123 0.141 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.015 0.001 0.014 0.015 Aqua Regia Digestion
Mo, Molybdenum (ppm) 4.79 0.466 4.54 5.04 Aqua Regia Digestion
Na, Sodium (wt.%) 0.011 0.002 0.010 0.012 Aqua Regia Digestion
Nb, Niobium (ppm) < 0.050 IND IND IND Aqua Regia Digestion
Ni, Nickel (ppm) 9.14 0.729 8.42 9.86 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.024 0.002 0.023 0.025 Aqua Regia Digestion
Pb, Lead (ppm) 114 4 109 118 Aqua Regia Digestion
Rb, Rubidium (ppm) 15.5 1.20 14.7 16.4 Aqua Regia Digestion
Re, Rhenium (ppm) 0.001 0.000 0.001 0.001 Aqua Regia Digestion
S, Sulphur (wt.%) 4.28 0.180 4.17 4.39 Aqua Regia Digestion
Sb, Antimony (ppm) 2.51 0.45 2.27 2.75 Aqua Regia Digestion
Sc, Scandium (ppm) 1.93 0.161 1.82 2.05 Aqua Regia Digestion
Se, Selenium (ppm) 44.5 4.5 41.7 47.2 Aqua Regia Digestion
Sn, Tin (ppm) 33.7 2.29 32.3 35.2 Aqua Regia Digestion
Sr, Strontium (ppm) 11.5 2.1 10.4 12.6 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.010 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.33 0.04 0.28 0.39 Aqua Regia Digestion
Te, Tellurium (ppm) 0.14 0.02 0.11 0.16 Aqua Regia Digestion
Th, Thorium (ppm) 7.25 0.326 6.91 7.59 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.005 0.001 0.005 0.005 Aqua Regia Digestion
Tl, Thallium (ppm) 0.14 0.02 0.13 0.16 Aqua Regia Digestion
U, Uranium (ppm) 2.06 0.117 1.95 2.18 Aqua Regia Digestion
V, Vanadium (ppm) 20.9 1.73 19.6 22.1 Aqua Regia Digestion
W, Tungsten (ppm) 14.1 1.9 13.0 15.2 Aqua Regia Digestion
Y, Yttrium (ppm) 5.70 0.337 5.47 5.94 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.59 0.026 0.54 0.63 Aqua Regia Digestion
Zn, Zinc (ppm) 272 10 264 281 Aqua Regia Digestion
Zr, Zirconium (ppm) 10.9 0.98 10.2 11.6 Aqua Regia Digestion
Al2O3, Aluminium(III) oxide (wt.%) 10.33 0.157 10.20 10.45 Borate Fusion XRF
BaO, Barium oxide (wt.%) 0.187 0.012 0.177 0.197 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.109 0.017 0.097 0.121 Borate Fusion XRF
Co, Cobalt (ppm) < 100 IND IND IND Borate Fusion XRF
Cr2O3, Chromium(III) oxide (ppm) 151 53 117 186 Borate Fusion XRF
Cu, Copper (wt.%) 3.91 0.063 3.84 3.98 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 12.23 0.101 12.11 12.35 Borate Fusion XRF
Hf, Hafnium (ppm) < 80 IND IND IND Borate Fusion XRF
K2O, Potassium oxide (wt.%) 2.60 0.035 2.56 2.64 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 0.619 0.040 0.589 0.649 Borate Fusion XRF
Mo, Molybdenum (ppm) < 50 IND IND IND Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 0.111 0.033 0.081 0.140 Borate Fusion XRF
Ni, Nickel (ppm) < 100 IND IND IND Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.065 0.007 0.060 0.070 Borate Fusion XRF
Rb, Rubidium (ppm) 97 23 61 134 Borate Fusion XRF
Sb, Antimony (ppm) < 50 IND IND IND Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 63.22 0.570 62.67 63.78 Borate Fusion XRF
SO3, Sulphur trioxide (wt.%) 10.56 0.959 9.88 11.24 Borate Fusion XRF
SrO, Strontium oxide (ppm) < 120 IND IND IND Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.426 0.017 0.407 0.444 Borate Fusion XRF
V, Vanadium (ppm) 137 44 102 171 Borate Fusion XRF
Zn, Zinc (ppm) 280 35 238 322 Borate Fusion XRF
Zr, Zirconium (ppm) 101 2 98 103 Borate Fusion XRF
LOI1000, Loss On Ignition @1000 °C (wt.%) 4.67 0.322 4.45 4.89 Thermogravimetry
Al, Aluminium (wt.%) 5.42 0.100 5.33 5.51 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 55 3.4 50 59 Borate / Peroxide Fusion ICP
Ba, Barium (wt.%) 0.165 0.005 0.161 0.169 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 2.00 0.23 1.75 2.25 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 219 10 208 230 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.085 0.017 0.074 0.095 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) < 10.0 IND IND IND Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 70 3.4 67 74 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 32.1 1.05 30.6 33.5 Borate / Peroxide Fusion ICP
Cr2O3, Chromium(III) oxide (ppm) 111 5 105 117 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 5.19 0.321 4.78 5.59 Borate / Peroxide Fusion ICP
Cu, Copper (wt.%) 3.89 0.098 3.81 3.98 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 4.09 0.162 3.78 4.41 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 2.32 0.173 2.06 2.57 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 1.12 0.085 0.99 1.25 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 8.55 0.185 8.42 8.68 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 17.1 1.06 15.9 18.4 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 4.78 0.281 4.33 5.23 Borate / Peroxide Fusion ICP
Ge, Germanium (ppm) 2.07 0.22 1.85 2.29 Borate / Peroxide Fusion ICP
Hf, Hafnium (ppm) 3.02 0.40 2.45 3.58 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.81 0.033 0.75 0.87 Borate / Peroxide Fusion ICP
In, Indium (ppm) 3.20 0.158 2.94 3.45 Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 2.12 0.097 2.06 2.19 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 36.9 2.44 34.3 39.5 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 19.6 1.81 17.7 21.6 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.34 0.04 0.29 0.39 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.372 0.014 0.360 0.384 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.017 0.001 0.016 0.018 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 5.33 0.61 4.32 6.34 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 9.13 0.465 8.31 9.96 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 31.8 1.45 29.5 34.1 Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.030 0.001 0.030 0.031 Borate / Peroxide Fusion ICP
Pb, Lead (ppm) 128 7 117 139 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 8.72 0.298 8.35 9.09 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 127 5 122 133 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 4.48 0.108 4.38 4.59 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 4.18 0.55 3.33 5.03 Borate / Peroxide Fusion ICP
Sc, Scandium (ppm) 9.14 0.738 7.96 10.32 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 30.03 0.891 29.44 30.63 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 5.99 0.282 5.74 6.24 Borate / Peroxide Fusion ICP
Sn, Tin (ppm) 41.0 2.83 36.2 45.9 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 44.9 4.6 41.7 48.1 Borate / Peroxide Fusion ICP
Ta, Tantalum (ppm) 0.74 0.14 0.59 0.89 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.71 0.045 0.63 0.80 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 11.6 0.44 11.0 12.1 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.252 0.007 0.243 0.261 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 0.84 0.068 0.73 0.94 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.34 0.021 0.30 0.38 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 3.88 0.144 3.57 4.18 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 164 6 160 168 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 19.9 1.87 18.0 21.8 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 22.5 0.99 21.2 23.9 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 2.26 0.158 2.05 2.46 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 291 17 276 307 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 104 10 91 117 Borate / Peroxide Fusion ICP
C, Carbon (wt.%) 0.676 0.025 0.660 0.692 Infrared Combustion
S, Sulphur (wt.%) 4.44 0.091 4.32 4.55 Infrared Combustion
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