OREAS 313

OREAS 313 is a replacement of the OREAS 136. It was prepared from a blend of barren and ore grade zinc-lead-silver materials sourced from Mount Isa (Glencore) George Fisher mine, Mt Isa, NW Queensland, Australia. The mineralisation style is sediment-hosted ‘SEDEX’ Zn-Pb-Ag within the Urquart Shale Formation of the Mount Isa Group. This Group is a 5 km thick sequence, composed predominantly of Mesoproterozoic carbonate siltstones, mudstones and shales, metamorphosed to greenschist facies. The Zn-Pb-Ag orebodies are concordant with carbonaceous dolomitic sediments and comprised of sphalerite and galena with pyrite and pyrrhotite. The following methods were undertaken:

  • 4-acid (HNO3-HF-HClO4-HCl) digestion with full suite ICP-OES and ICP-MS elemental packages
  • Aqua regia digestion for full elemental suite ICP-OES and ICP-MS
  • Lithium borate fusion whole rock analysis package by X-ray fluorescence
  • Thermogravimetry: Loss on Ignition (LOI) at 1000 °C
  • Lithium borate or sodium peroxide fusion with full suite ICP-OES and ICP-MS elemental packages
  • C and S by infrared combustion furnace/CS analyser
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Zn, Zinc (wt.%) 3.55 0.090 3.47 3.63 4-Acid Digestion
Pb, Lead (wt.%) 3.90 0.110 3.80 3.99 4-Acid Digestion
Ag, Silver (ppm) 75.6 2.10 73.9 77.2 4-Acid Digestion
Al, Aluminium (wt.%) 4.90 0.207 4.78 5.02 4-Acid Digestion
As, Arsenic (ppm) 94 3.6 91 97 4-Acid Digestion
Be, Beryllium (ppm) 2.19 0.174 2.07 2.30 4-Acid Digestion
Bi, Bismuth (ppm) 0.43 0.023 0.41 0.46 4-Acid Digestion
Ca, Calcium (wt.%) 1.35 0.039 1.33 1.38 4-Acid Digestion
Cd, Cadmium (ppm) 113 6 109 117 4-Acid Digestion
Ce, Cerium (ppm) 56 4.9 53 59 4-Acid Digestion
Co, Cobalt (ppm) 25.5 1.03 24.6 26.5 4-Acid Digestion
Cr, Chromium (ppm) 69 9 64 74 4-Acid Digestion
Cs, Caesium (ppm) 3.12 0.122 3.00 3.25 4-Acid Digestion
Cu, Copper (wt.%) 0.036 0.001 0.035 0.036 4-Acid Digestion
Dy, Dysprosium (ppm) 2.69 0.44 2.25 3.13 4-Acid Digestion
Er, Erbium (ppm) 1.34 0.17 1.12 1.56 4-Acid Digestion
Eu, Europium (ppm) 0.90 0.079 0.77 1.04 4-Acid Digestion
Fe, Iron (wt.%) 6.15 0.193 6.03 6.28 4-Acid Digestion
Ga, Gallium (ppm) 14.3 1.02 13.6 14.9 4-Acid Digestion
Gd, Gadolinium (ppm) 3.86 0.57 3.26 4.45 4-Acid Digestion
Ge, Germanium (ppm) 0.14 0.03 0.11 0.17 4-Acid Digestion
Hf, Hafnium (ppm) 2.08 0.150 1.96 2.19 4-Acid Digestion
Ho, Holmium (ppm) 0.50 0.025 0.45 0.54 4-Acid Digestion
In, Indium (ppm) 0.29 0.020 0.27 0.31 4-Acid Digestion
K, Potassium (wt.%) 2.00 0.065 1.96 2.04 4-Acid Digestion
La, Lanthanum (ppm) 28.9 3.3 26.9 30.8 4-Acid Digestion
Li, Lithium (ppm) 23.5 1.21 22.5 24.5 4-Acid Digestion
Lu, Lutetium (ppm) 0.21 0.04 0.17 0.26 4-Acid Digestion
Mg, Magnesium (wt.%) 1.03 0.040 1.00 1.05 4-Acid Digestion
Mn, Manganese (wt.%) 0.186 0.007 0.181 0.190 4-Acid Digestion
Mo, Molybdenum (ppm) 5.26 0.300 5.02 5.49 4-Acid Digestion
Na, Sodium (wt.%) 0.076 0.006 0.071 0.080 4-Acid Digestion
Nb, Niobium (ppm) 3.30 0.44 2.96 3.64 4-Acid Digestion
Nd, Neodymium (ppm) 26.6 1.56 24.3 28.8 4-Acid Digestion
Ni, Nickel (ppm) 15.9 0.98 15.0 16.8 4-Acid Digestion
P, Phosphorus (wt.%) 0.031 0.001 0.030 0.032 4-Acid Digestion
Pr, Praseodymium (ppm) 6.83 0.74 6.07 7.60 4-Acid Digestion
Rb, Rubidium (ppm) 108 5 104 112 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) 4.44 0.218 4.31 4.57 4-Acid Digestion
Sb, Antimony (ppm) 44.4 2.80 42.4 46.4 4-Acid Digestion
Sc, Scandium (ppm) 8.70 0.591 8.29 9.11 4-Acid Digestion
Sm, Samarium (ppm) 4.87 0.298 4.53 5.22 4-Acid Digestion
Sn, Tin (ppm) 2.59 0.216 2.43 2.75 4-Acid Digestion
Sr, Strontium (ppm) 41.7 1.90 40.2 43.2 4-Acid Digestion
Ta, Tantalum (ppm) 0.24 0.07 0.19 0.28 4-Acid Digestion
Tb, Terbium (ppm) 0.51 0.07 0.44 0.58 4-Acid Digestion
Te, Tellurium (ppm) 0.084 0.020 0.065 0.104 4-Acid Digestion
Th, Thorium (ppm) 9.98 0.782 9.47 10.49 4-Acid Digestion
Ti, Titanium (wt.%) 0.155 0.011 0.148 0.162 4-Acid Digestion
Tl, Thallium (ppm) 20.1 1.20 19.3 20.9 4-Acid Digestion
Tm, Thulium (ppm) 0.18 0.03 0.13 0.23 4-Acid Digestion
U, Uranium (ppm) 3.45 0.256 3.28 3.62 4-Acid Digestion
V, Vanadium (ppm) 133 4 130 137 4-Acid Digestion
W, Tungsten (ppm) 1.37 0.20 1.23 1.51 4-Acid Digestion
Y, Yttrium (ppm) 13.5 1.6 12.4 14.6 4-Acid Digestion
Yb, Ytterbium (ppm) 1.45 0.28 1.24 1.67 4-Acid Digestion
Zr, Zirconium (ppm) 70 4.1 67 73 4-Acid Digestion
Ag, Silver (ppm) 74.6 2.52 72.8 76.4 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.787 0.057 0.745 0.830 Aqua Regia Digestion
As, Arsenic (ppm) 93 7.5 88 99 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) 0.51 0.039 0.48 0.54 Aqua Regia Digestion
Bi, Bismuth (ppm) 0.32 0.028 0.29 0.34 Aqua Regia Digestion
Ca, Calcium (wt.%) 1.34 0.053 1.31 1.37 Aqua Regia Digestion
Cd, Cadmium (ppm) 110 6 106 113 Aqua Regia Digestion
Ce, Cerium (ppm) 36.3 8.3 32.0 40.6 Aqua Regia Digestion
Co, Cobalt (ppm) 25.8 2.13 24.2 27.4 Aqua Regia Digestion
Cr, Chromium (ppm) 21.0 1.96 19.4 22.6 Aqua Regia Digestion
Cs, Caesium (ppm) 0.84 0.15 0.75 0.94 Aqua Regia Digestion
Cu, Copper (wt.%) 0.037 0.001 0.036 0.038 Aqua Regia Digestion
Fe, Iron (wt.%) 5.91 0.226 5.76 6.06 Aqua Regia Digestion
Ga, Gallium (ppm) 2.49 0.29 2.28 2.71 Aqua Regia Digestion
Ge, Germanium (ppm) 0.11 0.01 0.09 0.13 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.35 0.04 0.32 0.39 Aqua Regia Digestion
Hg, Mercury (ppm) 0.78 0.052 0.72 0.84 Aqua Regia Digestion
In, Indium (ppm) 0.25 0.018 0.23 0.27 Aqua Regia Digestion
K, Potassium (wt.%) 0.245 0.021 0.233 0.258 Aqua Regia Digestion
La, Lanthanum (ppm) 16.9 3.3 15.1 18.6 Aqua Regia Digestion
Li, Lithium (ppm) 7.00 0.317 6.75 7.25 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.822 0.040 0.792 0.853 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.185 0.008 0.178 0.191 Aqua Regia Digestion
Mo, Molybdenum (ppm) 5.08 0.282 4.81 5.36 Aqua Regia Digestion
Nb, Niobium (ppm) 0.057 0.011 0.037 0.076 Aqua Regia Digestion
Ni, Nickel (ppm) 13.9 0.91 13.2 14.6 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.028 0.001 0.027 0.029 Aqua Regia Digestion
Pb, Lead (wt.%) 3.84 0.109 3.76 3.91 Aqua Regia Digestion
Rb, Rubidium (ppm) 14.5 1.8 13.4 15.7 Aqua Regia Digestion
S, Sulphur (wt.%) 4.55 0.148 4.42 4.68 Aqua Regia Digestion
Sb, Antimony (ppm) 33.1 3.23 30.8 35.4 Aqua Regia Digestion
Sc, Scandium (ppm) 1.93 0.132 1.79 2.07 Aqua Regia Digestion
Se, Selenium (ppm) 1.94 0.45 1.55 2.33 Aqua Regia Digestion
Sn, Tin (ppm) 0.52 0.07 0.44 0.59 Aqua Regia Digestion
Sr, Strontium (ppm) 18.6 2.7 17.0 20.3 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.010 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.31 0.031 0.28 0.35 Aqua Regia Digestion
Te, Tellurium (ppm) 0.069 0.013 0.050 0.087 Aqua Regia Digestion
Th, Thorium (ppm) 6.36 0.93 5.87 6.86 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.006 0.001 0.005 0.006 Aqua Regia Digestion
Tl, Thallium (ppm) 10.9 0.75 10.3 11.5 Aqua Regia Digestion
U, Uranium (ppm) 1.81 0.160 1.70 1.92 Aqua Regia Digestion
V, Vanadium (ppm) 17.8 1.70 16.7 18.9 Aqua Regia Digestion
W, Tungsten (ppm) 0.14 0.02 0.12 0.16 Aqua Regia Digestion
Y, Yttrium (ppm) 5.63 0.398 5.34 5.93 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.56 0.043 0.46 0.66 Aqua Regia Digestion
Zn, Zinc (wt.%) 3.45 0.060 3.39 3.51 Aqua Regia Digestion
Zr, Zirconium (ppm) 11.8 1.13 11.2 12.5 Aqua Regia Digestion
Al2O3, Aluminium(III) oxide (wt.%) 9.53 0.114 9.41 9.65 Borate Fusion XRF
BaO, Barium oxide (wt.%) 0.269 0.011 0.260 0.279 Borate Fusion XRF
Bi, Bismuth (ppm) < 100 IND IND IND Borate Fusion XRF
CaO, Calcium oxide (wt.%) 1.91 0.036 1.88 1.94 Borate Fusion XRF
Cr2O3, Chromium(III) oxide (ppm) 150 21 123 178 Borate Fusion XRF
Cu, Copper (wt.%) 0.035 0.004 0.032 0.037 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 8.99 0.106 8.88 9.10 Borate Fusion XRF
HfO2, Hafnium dioxide (ppm) < 100 IND IND IND Borate Fusion XRF
K2O, Potassium oxide (wt.%) 2.43 0.029 2.40 2.46 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 1.76 0.087 1.71 1.82 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.246 0.006 0.239 0.254 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.071 0.006 0.063 0.079 Borate Fusion XRF
Pb, Lead (wt.%) 3.86 0.087 3.78 3.93 Borate Fusion XRF
S, Sulphur (wt.%) 4.59 0.137 4.45 4.74 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 57.61 0.551 56.94 58.28 Borate Fusion XRF
Sn, Tin (ppm) < 50 IND IND IND Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.407 0.014 0.393 0.420 Borate Fusion XRF
Zn, Zinc (wt.%) 3.47 0.087 3.40 3.54 Borate Fusion XRF
LOI1000, Loss on ignition @1000 °C (wt.%) 7.94 0.267 7.76 8.12 Thermogravimetry
Al, Aluminium (wt.%) 4.96 0.080 4.88 5.03 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 93 4.5 88 97 Borate / Peroxide Fusion ICP
Ba, Barium (wt.%) 0.238 0.006 0.232 0.244 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 2.35 0.57 1.82 2.87 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 0.45 0.06 0.34 0.56 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 1.34 0.068 1.28 1.41 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) 112 3 108 116 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 60 2.2 58 63 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 26.4 1.69 25.0 27.9 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 79 6.4 74 84 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 3.24 0.157 3.08 3.40 Borate / Peroxide Fusion ICP
Cu, Copper (wt.%) 0.036 0.002 0.035 0.038 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 3.57 0.221 3.21 3.94 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 2.13 0.125 1.97 2.28 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 1.00 0.089 0.92 1.09 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 6.23 0.168 6.10 6.35 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 14.6 0.82 13.5 15.7 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 4.37 0.245 4.04 4.70 Borate / Peroxide Fusion ICP
Ge, Germanium (ppm) 10.4 0.52 9.6 11.2 Borate / Peroxide Fusion ICP
Hf, Hafnium (ppm) 3.02 0.201 2.73 3.31 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.72 0.022 0.67 0.76 Borate / Peroxide Fusion ICP
In, Indium (ppm) 0.30 0.020 0.26 0.35 Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 2.05 0.036 2.01 2.08 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 31.8 1.59 30.6 33.0 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 23.6 1.62 22.1 25.1 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.30 0.015 0.29 0.32 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 1.05 0.027 1.02 1.07 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.188 0.007 0.182 0.194 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 5.14 0.60 4.62 5.66 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 7.97 0.626 7.08 8.86 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 27.4 1.73 26.0 28.8 Borate / Peroxide Fusion ICP
Ni, Nickel (ppm) 19.3 3.3 14.5 24.1 Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.031 0.003 0.029 0.034 Borate / Peroxide Fusion ICP
Pb, Lead (wt.%) 3.77 0.076 3.69 3.85 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 7.46 0.340 7.12 7.80 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 109 5 105 114 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 4.57 0.083 4.44 4.70 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 48.5 3.36 44.3 52.8 Borate / Peroxide Fusion ICP
Sc, Scandium (ppm) 8.38 0.668 7.67 9.09 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 27.25 0.587 26.58 27.92 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 5.11 0.318 4.79 5.43 Borate / Peroxide Fusion ICP
Sn, Tin (ppm) 2.78 0.29 2.09 3.47 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 46.6 3.86 43.7 49.5 Borate / Peroxide Fusion ICP
Ta, Tantalum (ppm) 0.72 0.08 0.57 0.87 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.62 0.044 0.54 0.70 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 10.7 0.46 10.3 11.0 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.237 0.008 0.230 0.245 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 20.1 0.85 19.0 21.2 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.31 0.010 0.28 0.33 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 3.61 0.145 3.37 3.85 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 137 5 132 143 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 20.1 0.74 19.2 21.0 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 2.06 0.075 1.85 2.26 Borate / Peroxide Fusion ICP
Zn, Zinc (wt.%) 3.45 0.090 3.38 3.51 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 103 4 96 111 Borate / Peroxide Fusion ICP
C, Carbon (wt.%) 1.59 0.052 1.56 1.61 Infrared Combustion
S, Sulphur (wt.%) 4.66 0.103 4.59 4.73 Infrared Combustion
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