OREAS 931b

OREAS 931b was prepared from a blend of barren black slate and copper ore. The barren black slate was sourced from a quarry located in Victoria, Australia and the copper ore was sourced from the CSA mine located near the town of Cobar in central western New South Wales, Australia. The copper ore body of the CSA mine 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.Twenty-three commercial analytical laboratories participated in the following program:

  • 4-acid (HF-HNO3-HClO4-HCl) digestion for full ICP-OES and ICP-MS elemental suites
  • Aqua regia digestion for full ICP-OES and ICP-MS elemental suites
  • Peroxide fusion for full ICP-OES and ICP-MS elemental suites
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Cu, Copper (wt.%) 3.95 0.124 3.84 4.06 4-Acid Digestion
Ag, Silver (ppm) 16.9 0.54 16.3 17.5 4-Acid Digestion
Zn, Zinc (ppm) 287 11 276 298 4-Acid Digestion
Al, Aluminium (wt.%) 5.54 0.155 5.42 5.67 4-Acid Digestion
As, Arsenic (ppm) 99 4.5 94 103 4-Acid Digestion
Be, Beryllium (ppm) 2.08 0.184 1.94 2.22 4-Acid Digestion
Bi, Bismuth (ppm) 211 15 201 222 4-Acid Digestion
Ca, Calcium (wt.%) 0.083 0.005 0.079 0.088 4-Acid Digestion
Cd, Cadmium (ppm) 0.64 0.06 0.58 0.70 4-Acid Digestion
Ce, Cerium (ppm) 71 5.1 66 75 4-Acid Digestion
Co, Cobalt (ppm) 29.6 1.41 28.3 30.9 4-Acid Digestion
Cr, Chromium (ppm) 72 6.2 67 77 4-Acid Digestion
Cs, Caesium (ppm) 4.75 0.261 4.52 4.97 4-Acid Digestion
Dy, Dysprosium (ppm) 3.06 0.32 2.74 3.38 4-Acid Digestion
Er, Erbium (ppm) 1.37 0.091 1.26 1.48 4-Acid Digestion
Eu, Europium (ppm) 1.09 0.106 0.96 1.22 4-Acid Digestion
Fe, Iron (wt.%) 8.55 0.341 8.27 8.83 4-Acid Digestion
Ga, Gallium (ppm) 17.7 1.23 16.7 18.7 4-Acid Digestion
Gd, Gadolinium (ppm) 4.43 0.411 3.86 5.00 4-Acid Digestion
Ge, Germanium (ppm) 0.21 0.04 0.17 0.25 4-Acid Digestion
Hf, Hafnium (ppm) 1.82 0.080 1.73 1.90 4-Acid Digestion
Ho, Holmium (ppm) 0.49 0.044 0.44 0.53 4-Acid Digestion
In, Indium (ppm) 3.32 0.145 3.17 3.46 4-Acid Digestion
K, Potassium (wt.%) 2.18 0.083 2.10 2.25 4-Acid Digestion
La, Lanthanum (ppm) 32.3 3.7 30.0 34.7 4-Acid Digestion
Li, Lithium (ppm) 17.0 0.65 16.1 17.9 4-Acid Digestion
Lu, Lutetium (ppm) 0.22 0.017 0.19 0.25 4-Acid Digestion
Mg, Magnesium (wt.%) 0.354 0.019 0.339 0.369 4-Acid Digestion
Mn, Manganese (wt.%) 0.016 0.001 0.016 0.017 4-Acid Digestion
Mo, Molybdenum (ppm) 3.38 0.175 3.22 3.55 4-Acid Digestion
Na, Sodium (wt.%) 0.076 0.005 0.074 0.079 4-Acid Digestion
Nb, Niobium (ppm) 2.72 0.63 2.37 3.08 4-Acid Digestion
Nd, Neodymium (ppm) 29.9 2.52 27.0 32.7 4-Acid Digestion
Ni, Nickel (ppm) 12.6 0.68 11.9 13.3 4-Acid Digestion
P, Phosphorus (wt.%) 0.027 0.002 0.026 0.028 4-Acid Digestion
Pb, Lead (ppm) 121 7 115 127 4-Acid Digestion
Pr, Praseodymium (ppm) 8.12 0.780 7.28 8.97 4-Acid Digestion
Rb, Rubidium (ppm) 127 4 122 131 4-Acid Digestion
Re, Rhenium (ppm) 0.002 0.001 0.001 0.003 4-Acid Digestion
S, Sulphur (wt.%) 4.30 0.159 4.20 4.40 4-Acid Digestion
Sb, Antimony (ppm) 4.22 0.249 3.97 4.46 4-Acid Digestion
Sc, Scandium (ppm) 10.1 0.57 9.6 10.6 4-Acid Digestion
Se, Selenium (ppm) 45.9 3.47 43.2 48.7 4-Acid Digestion
Sm, Samarium (ppm) 5.77 0.485 5.28 6.27 4-Acid Digestion
Sn, Tin (ppm) 37.4 1.13 35.6 39.2 4-Acid Digestion
Sr, Strontium (ppm) 46.6 2.48 44.3 48.9 4-Acid Digestion
Ta, Tantalum (ppm) 0.20 0.05 0.16 0.24 4-Acid Digestion
Tb, Terbium (ppm) 0.59 0.041 0.52 0.65 4-Acid Digestion
Te, Tellurium (ppm) 0.17 0.02 0.14 0.21 4-Acid Digestion
Th, Thorium (ppm) 11.3 0.95 10.6 12.0 4-Acid Digestion
Ti, Titanium (wt.%) 0.150 0.015 0.141 0.159 4-Acid Digestion
Tl, Thallium (ppm) 0.71 0.036 0.67 0.75 4-Acid Digestion
Tm, Thulium (ppm) 0.20 0.008 0.19 0.21 4-Acid Digestion
U, Uranium (ppm) 3.46 0.195 3.28 3.63 4-Acid Digestion
V, Vanadium (ppm) 138 6 133 143 4-Acid Digestion
W, Tungsten (ppm) 18.8 0.85 18.0 19.6 4-Acid Digestion
Y, Yttrium (ppm) 13.5 1.9 12.4 14.7 4-Acid Digestion
Yb, Ytterbium (ppm) 1.38 0.15 1.23 1.53 4-Acid Digestion
Zr, Zirconium (ppm) 62 4.6 59 65 4-Acid Digestion
Ag, Silver (ppm) 17.1 1.33 16.4 17.8 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.727 0.059 0.689 0.766 Aqua Regia Digestion
As, Arsenic (ppm) 97 6.0 93 101 Aqua Regia Digestion
Au, Gold (ppm) 0.018 0.003 0.015 0.021 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) 0.44 0.08 0.37 0.50 Aqua Regia Digestion
Bi, Bismuth (ppm) 210 16 198 222 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.079 0.003 0.076 0.081 Aqua Regia Digestion
Cd, Cadmium (ppm) 0.62 0.09 0.55 0.68 Aqua Regia Digestion
Ce, Cerium (ppm) 49.9 2.62 47.7 52.1 Aqua Regia Digestion
Co, Cobalt (ppm) 29.6 2.07 28.3 30.8 Aqua Regia Digestion
Cr, Chromium (ppm) 21.1 0.70 19.7 22.5 Aqua Regia Digestion
Cs, Caesium (ppm) 2.06 0.193 1.93 2.19 Aqua Regia Digestion
Cu, Copper (wt.%) 3.95 0.121 3.85 4.05 Aqua Regia Digestion
Fe, Iron (wt.%) 8.29 0.309 8.06 8.52 Aqua Regia Digestion
Ga, Gallium (ppm) 3.25 0.40 3.00 3.50 Aqua Regia Digestion
Ge, Germanium (ppm) 0.18 0.03 0.14 0.21 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.34 0.022 0.31 0.37 Aqua Regia Digestion
Hg, Mercury (ppm) 0.11 0.03 0.09 0.14 Aqua Regia Digestion
In, Indium (ppm) 3.24 0.124 3.13 3.34 Aqua Regia Digestion
K, Potassium (wt.%) 0.190 0.020 0.177 0.204 Aqua Regia Digestion
La, Lanthanum (ppm) 19.5 2.1 18.1 21.0 Aqua Regia Digestion
Li, Lithium (ppm) 2.03 0.35 1.74 2.32 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.092 0.012 0.071 0.112 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.128 0.012 0.118 0.137 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.014 0.001 0.013 0.014 Aqua Regia Digestion
Mo, Molybdenum (ppm) 3.40 0.236 3.22 3.58 Aqua Regia Digestion
Na, Sodium (wt.%) 0.010 0.002 0.009 0.011 Aqua Regia Digestion
Nb, Niobium (ppm) 0.056 0.009 0.043 0.068 Aqua Regia Digestion
Ni, Nickel (ppm) 10.2 0.77 9.6 10.8 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.022 0.003 0.020 0.023 Aqua Regia Digestion
Pb, Lead (ppm) 115 6 111 119 Aqua Regia Digestion
Rb, Rubidium (ppm) 13.7 1.06 12.9 14.6 Aqua Regia Digestion
Re, Rhenium (ppm) 0.001 0.000 0.000 0.002 Aqua Regia Digestion
S, Sulphur (wt.%) 4.25 0.216 4.11 4.39 Aqua Regia Digestion
Sb, Antimony (ppm) 2.94 0.56 2.64 3.25 Aqua Regia Digestion
Sc, Scandium (ppm) 1.47 0.17 1.34 1.61 Aqua Regia Digestion
Se, Selenium (ppm) 46.3 3.07 44.2 48.5 Aqua Regia Digestion
Sn, Tin (ppm) 34.6 3.7 32.4 36.8 Aqua Regia Digestion
Sr, Strontium (ppm) 13.5 2.5 12.0 15.0 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.010 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.36 0.05 0.29 0.43 Aqua Regia Digestion
Te, Tellurium (ppm) 0.16 0.014 0.14 0.19 Aqua Regia Digestion
Th, Thorium (ppm) 7.68 0.578 7.15 8.21 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.007 0.002 0.006 0.008 Aqua Regia Digestion
Tl, Thallium (ppm) 0.11 0.010 0.10 0.12 Aqua Regia Digestion
U, Uranium (ppm) 2.08 0.114 1.98 2.19 Aqua Regia Digestion
V, Vanadium (ppm) 18.8 2.3 17.5 20.1 Aqua Regia Digestion
W, Tungsten (ppm) 13.7 1.31 12.7 14.6 Aqua Regia Digestion
Y, Yttrium (ppm) 5.53 0.471 5.20 5.86 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.61 0.027 0.58 0.64 Aqua Regia Digestion
Zn, Zinc (ppm) 272 7 265 279 Aqua Regia Digestion
Zr, Zirconium (ppm) 10.8 1.3 10.0 11.5 Aqua Regia Digestion
Al2O3, Aluminium(III) oxide (wt.%) 10.81 0.137 10.67 10.95 Borate Fusion XRF
BaO, Barium oxide (ppm) 2009 144 1877 2140 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.115 0.011 0.104 0.126 Borate Fusion XRF
Cu, Copper (wt.%) 3.95 0.109 3.86 4.04 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 12.42 0.191 12.24 12.61 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 2.55 0.102 2.41 2.70 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 0.632 0.068 0.534 0.730 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.022 0.005 0.015 0.029 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.070 0.014 0.049 0.090 Borate Fusion XRF
S, Sulphur (wt.%) 4.35 0.234 4.18 4.52 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 62.36 0.708 61.66 63.07 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.441 0.023 0.411 0.471 Borate Fusion XRF
Zn, Zinc (ppm) 290 25 268 312 Borate Fusion XRF
Al, Aluminium (wt.%) 5.73 0.160 5.60 5.87 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 97 9.5 88 106 Borate / Peroxide Fusion ICP
B, Boron (ppm) 114 10 97 130 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 1739 54 1672 1806 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 2.06 0.199 1.98 2.13 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 216 11 203 228 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.096 0.025 0.071 0.121 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 76 4.1 71 81 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 28.4 1.72 26.9 29.8 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 91 18 82 100 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 4.92 0.248 4.60 5.23 Borate / Peroxide Fusion ICP
Cu, Copper (wt.%) 3.96 0.092 3.84 4.07 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 4.12 0.193 3.90 4.33 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 2.36 0.152 2.06 2.66 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 1.26 0.120 1.10 1.41 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 8.68 0.138 8.49 8.86 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 18.3 2.1 16.7 19.9 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 4.94 0.333 4.48 5.41 Borate / Peroxide Fusion ICP
Ge, Germanium (ppm) 2.33 0.48 1.69 2.96 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.81 0.054 0.74 0.88 Borate / Peroxide Fusion ICP
In, Indium (ppm) 3.32 0.192 3.08 3.56 Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 2.24 0.072 2.18 2.31 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 37.2 2.84 34.4 39.9 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 17.8 2.0 14.6 21.0 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.34 0.023 0.30 0.38 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.376 0.015 0.360 0.391 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.018 0.002 0.017 0.018 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 3.74 0.81 2.89 4.60 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 8.37 1.36 6.70 10.04 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 31.6 1.07 29.7 33.6 Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.030 0.004 0.024 0.035 Borate / Peroxide Fusion ICP
Pb, Lead (ppm) 121 20 106 136 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 8.45 0.360 8.01 8.89 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 124 6 118 130 Borate / Peroxide Fusion ICP
Re, Rhenium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 4.42 0.171 4.28 4.57 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 3.99 0.73 3.14 4.84 Borate / Peroxide Fusion ICP
Sc, Scandium (ppm) 9.44 1.23 7.97 10.92 Borate / Peroxide Fusion ICP
Se, Selenium (ppm) 46.2 4.22 41.7 50.8 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 29.73 0.851 29.11 30.34 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 5.85 0.278 5.56 6.14 Borate / Peroxide Fusion ICP
Sn, Tin (ppm) 45.1 5.0 39.8 50.3 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 54 5.2 50 58 Borate / Peroxide Fusion ICP
Ta, Tantalum (ppm) 0.94 0.35 0.68 1.20 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.72 0.040 0.67 0.77 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 11.7 1.2 10.7 12.7 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.265 0.008 0.258 0.273 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 0.74 0.052 0.65 0.83 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.34 0.030 0.30 0.39 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 3.80 0.321 3.51 4.09 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 144 6 138 150 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 17.8 2.6 15.5 20.1 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 23.6 0.92 22.6 24.6 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 2.25 0.184 2.00 2.49 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 283 23 269 298 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 4.43 0.113 4.35 4.51 Infrared Combustion
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