OREAS 20b

OREAS 20b was prepared from barren granodiorite sourced from the mafic, S-Type, Late Devonian Bulla Granodiorite complex located in northern Melbourne, Australia. Fifteen laboratories participated in the program to characterise the elements reported below. The following methods were employed:

  • Au, Pt and Pd by low level fire assay with ICP-OES, MS or AAS finish
  • Lithium borate fusion for full suite X-ray fluorescence including LOI at 1000 degrees
  • Sodium peroxide fusion or lithium borate fusion for full suite ICP-OES and ICP-MS
  • 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
  • Infrared combustion furnace for Total C and S
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Au, Gold (ppb) 4 1.8 2 7 Pb Fire Assay
Pd, Palladium (ppb) < 1.00 IND IND IND Pb Fire Assay
Pt, Platinum (ppb) < 5.00 IND IND IND Pb Fire Assay
Al2O3, Aluminium(III) oxide (wt.%) 15.18 0.119 15.05 15.30 Borate Fusion XRF
BaO, Barium oxide (ppm) 1145 99 1044 1247 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 2.44 0.028 2.41 2.48 Borate Fusion XRF
Cr2O3, Chromium(III) oxide (ppm) 119 30 87 151 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 4.32 0.035 4.28 4.36 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 3.57 0.048 3.52 3.61 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 1.28 0.017 1.26 1.30 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.048 0.004 0.044 0.052 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 2.78 0.056 2.74 2.83 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.195 0.005 0.190 0.199 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 68.28 0.440 67.79 68.77 Borate Fusion XRF
SO3, Sulphur trioxide (wt.%) 0.316 0.022 0.294 0.338 Borate Fusion XRF
SrO, Strontium oxide (ppm) 207 19 189 224 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.629 0.014 0.616 0.641 Borate Fusion XRF
LOI1000, Loss On Ignition @1000°C (wt.%) 0.783 0.094 0.679 0.888 Thermogravimetry
Al, Aluminium (wt.%) 8.08 0.230 7.82 8.33 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 1042 39 1006 1078 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 2.93 0.36 2.40 3.47 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 1.75 0.063 1.67 1.84 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 80 3.5 76 83 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 8.41 0.750 7.69 9.13 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 63 5.8 59 67 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 11.7 0.39 11.4 12.1 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 27.0 7.7 15.0 39.0 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 5.96 0.324 5.49 6.44 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 3.07 0.228 2.72 3.41 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 1.45 0.076 1.33 1.58 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 3.06 0.109 2.97 3.14 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 21.3 1.17 20.3 22.3 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 6.99 0.291 6.59 7.38 Borate / Peroxide Fusion ICP
Ge, Germanium (ppm) 1.84 0.29 1.52 2.17 Borate / Peroxide Fusion ICP
Hf, Hafnium (ppm) 6.96 0.382 6.53 7.39 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 1.12 0.067 0.99 1.25 Borate / Peroxide Fusion ICP
In, Indium (ppm) < 0.20 IND IND IND Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 2.98 0.135 2.86 3.10 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 38.9 1.89 35.9 42.0 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 54 6 45 63 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.40 0.021 0.37 0.44 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.788 0.018 0.763 0.814 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.038 0.001 0.037 0.039 Borate / Peroxide Fusion ICP
Na, Sodium (wt.%) 2.04 0.046 1.98 2.09 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 13.4 1.06 12.5 14.3 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 36.5 1.41 34.2 38.7 Borate / Peroxide Fusion ICP
Ni, Nickel (ppm) 22.8 7.0 12.5 33.2 Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.081 0.004 0.073 0.089 Borate / Peroxide Fusion ICP
Pb, Lead (ppm) 26.8 6.3 17.4 36.1 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 9.34 0.314 8.77 9.92 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 176 9 168 183 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 0.129 0.010 0.115 0.142 Borate / Peroxide Fusion ICP
Sc, Scandium (ppm) 9.23 0.651 8.08 10.37 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 31.89 1.301 30.67 33.12 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 7.79 0.320 7.40 8.18 Borate / Peroxide Fusion ICP
Sn, Tin (ppm) 5.21 0.374 4.50 5.93 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 160 9 153 168 Borate / Peroxide Fusion ICP
Ta, Tantalum (ppm) 1.19 0.108 1.06 1.32 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 1.04 0.053 0.99 1.09 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 15.8 1.02 14.9 16.7 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.376 0.015 0.357 0.395 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) 1.04 0.086 0.85 1.23 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.43 0.027 0.39 0.48 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 4.74 0.471 3.93 5.54 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 68 2.8 64 71 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 11.6 1.6 8.8 14.5 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 31.5 1.55 29.4 33.6 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 2.69 0.258 2.43 2.96 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 83 6.6 74 93 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 254 8 238 270 Borate / Peroxide Fusion ICP
Ag, Silver (ppm) 0.088 0.014 0.064 0.112 4-Acid Digestion
Al, Aluminium (wt.%) 7.63 0.285 7.31 7.96 4-Acid Digestion
As, Arsenic (ppm) 2.05 0.56 1.41 2.69 4-Acid Digestion
Ba, Barium (ppm) 1056 41 1015 1098 4-Acid Digestion
Be, Beryllium (ppm) 2.68 0.173 2.52 2.85 4-Acid Digestion
Bi, Bismuth (ppm) 0.79 0.13 0.62 0.97 4-Acid Digestion
Ca, Calcium (wt.%) 1.73 0.044 1.67 1.78 4-Acid Digestion
Cd, Cadmium (ppm) 0.19 0.018 0.17 0.22 4-Acid Digestion
Ce, Cerium (ppm) 79 5.0 73 84 4-Acid Digestion
Co, Cobalt (ppm) 8.40 0.381 7.89 8.91 4-Acid Digestion
Cr, Chromium (ppm) 47.9 8.5 42.7 53.1 4-Acid Digestion
Cs, Caesium (ppm) 12.0 0.90 11.3 12.8 4-Acid Digestion
Cu, Copper (ppm) 22.7 1.64 20.9 24.5 4-Acid Digestion
Dy, Dysprosium (ppm) 3.76 0.195 3.44 4.08 4-Acid Digestion
Er, Erbium (ppm) 1.43 0.094 1.19 1.67 4-Acid Digestion
Eu, Europium (ppm) 1.50 0.087 1.37 1.62 4-Acid Digestion
Fe, Iron (wt.%) 2.98 0.147 2.88 3.09 4-Acid Digestion
Ga, Gallium (ppm) 21.0 0.82 20.1 21.9 4-Acid Digestion
Gd, Gadolinium (ppm) 6.09 0.260 5.58 6.60 4-Acid Digestion
Ge, Germanium (ppm) 0.16 0.05 0.09 0.23 4-Acid Digestion
Hf, Hafnium (ppm) 1.96 0.141 1.83 2.09 4-Acid Digestion
Ho, Holmium (ppm) 0.60 0.06 0.52 0.68 4-Acid Digestion
In, Indium (ppm) 0.067 0.005 0.061 0.073 4-Acid Digestion
K, Potassium (wt.%) 2.95 0.070 2.85 3.04 4-Acid Digestion
La, Lanthanum (ppm) 38.1 2.67 34.5 41.7 4-Acid Digestion
Li, Lithium (ppm) 56 2.0 54 58 4-Acid Digestion
Lu, Lutetium (ppm) 0.17 0.03 0.15 0.20 4-Acid Digestion
Mg, Magnesium (wt.%) 0.749 0.033 0.719 0.778 4-Acid Digestion
Mn, Manganese (wt.%) 0.036 0.001 0.035 0.038 4-Acid Digestion
Mo, Molybdenum (ppm) 2.65 0.198 2.44 2.86 4-Acid Digestion
Na, Sodium (wt.%) 2.04 0.045 2.00 2.08 4-Acid Digestion
Nb, Niobium (ppm) 13.2 0.62 12.6 13.8 4-Acid Digestion
Nd, Neodymium (ppm) 34.5 2.25 31.1 38.0 4-Acid Digestion
Ni, Nickel (ppm) 18.7 0.79 17.8 19.6 4-Acid Digestion
P, Phosphorus (wt.%) 0.083 0.002 0.081 0.086 4-Acid Digestion
Pb, Lead (ppm) 24.5 1.11 23.2 25.8 4-Acid Digestion
Pr, Praseodymium (ppm) 8.96 0.616 7.97 9.95 4-Acid Digestion
Rb, Rubidium (ppm) 173 8 166 181 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) 0.129 0.005 0.123 0.135 4-Acid Digestion
Sb, Antimony (ppm) 0.26 0.025 0.23 0.29 4-Acid Digestion
Sc, Scandium (ppm) 8.78 0.590 8.25 9.31 4-Acid Digestion
Sm, Samarium (ppm) 7.15 0.416 6.60 7.70 4-Acid Digestion
Sn, Tin (ppm) 5.05 0.320 4.73 5.38 4-Acid Digestion
Sr, Strontium (ppm) 161 5 155 167 4-Acid Digestion
Ta, Tantalum (ppm) 1.17 0.081 1.09 1.25 4-Acid Digestion
Tb, Terbium (ppm) 0.77 0.069 0.68 0.87 4-Acid Digestion
Te, Tellurium (ppm) < 0.050 IND IND IND 4-Acid Digestion
Th, Thorium (ppm) 15.1 1.28 13.8 16.4 4-Acid Digestion
Ti, Titanium (wt.%) 0.371 0.011 0.360 0.383 4-Acid Digestion
Tl, Thallium (ppm) 0.97 0.056 0.91 1.03 4-Acid Digestion
Tm, Thulium (ppm) 0.19 0.012 0.18 0.21 4-Acid Digestion
U, Uranium (ppm) 4.04 0.384 3.51 4.57 4-Acid Digestion
V, Vanadium (ppm) 62 2.1 60 65 4-Acid Digestion
W, Tungsten (ppm) 11.3 1.3 10.1 12.6 4-Acid Digestion
Y, Yttrium (ppm) 15.8 1.49 14.5 17.0 4-Acid Digestion
Yb, Ytterbium (ppm) 1.07 0.090 0.94 1.20 4-Acid Digestion
Zn, Zinc (ppm) 82 2.4 79 86 4-Acid Digestion
Zr, Zirconium (ppm) 62 4.3 58 65 4-Acid Digestion
Ag, Silver (ppm) 0.085 0.011 0.069 0.101 Aqua Regia Digestion
Al, Aluminium (wt.%) 2.15 0.105 2.07 2.23 Aqua Regia Digestion
As, Arsenic (ppm) 2.09 0.23 1.72 2.46 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Ba, Barium (ppm) 532 20 518 547 Aqua Regia Digestion
Be, Beryllium (ppm) 1.77 0.111 1.65 1.89 Aqua Regia Digestion
Bi, Bismuth (ppm) 0.83 0.13 0.56 1.10 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.403 0.040 0.374 0.432 Aqua Regia Digestion
Cd, Cadmium (ppm) 0.084 0.012 0.067 0.101 Aqua Regia Digestion
Ce, Cerium (ppm) 39.2 5.6 34.4 44.0 Aqua Regia Digestion
Co, Cobalt (ppm) 8.23 0.383 7.87 8.59 Aqua Regia Digestion
Cr, Chromium (ppm) 57 3.5 54 59 Aqua Regia Digestion
Cs, Caesium (ppm) 10.2 0.46 9.7 10.6 Aqua Regia Digestion
Cu, Copper (ppm) 22.5 1.26 21.5 23.5 Aqua Regia Digestion
Fe, Iron (wt.%) 2.87 0.082 2.79 2.95 Aqua Regia Digestion
Ga, Gallium (ppm) 9.95 0.541 9.48 10.42 Aqua Regia Digestion
Ge, Germanium (ppm) 0.12 0.02 0.09 0.14 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.33 0.04 0.29 0.36 Aqua Regia Digestion
Hg, Mercury (ppm) < 0.010 IND IND IND Aqua Regia Digestion
In, Indium (ppm) 0.063 0.004 0.057 0.069 Aqua Regia Digestion
K, Potassium (wt.%) 1.04 0.043 1.01 1.07 Aqua Regia Digestion
La, Lanthanum (ppm) 18.8 1.63 17.6 20.1 Aqua Regia Digestion
Li, Lithium (ppm) 45.0 1.89 43.1 46.8 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.728 0.031 0.704 0.752 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.031 0.001 0.030 0.032 Aqua Regia Digestion
Mo, Molybdenum (ppm) 2.31 0.151 2.09 2.54 Aqua Regia Digestion
Na, Sodium (wt.%) 0.156 0.011 0.147 0.164 Aqua Regia Digestion
Nb, Niobium (ppm) 0.81 0.19 0.55 1.07 Aqua Regia Digestion
Ni, Nickel (ppm) 18.5 0.59 17.9 19.1 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.063 0.002 0.062 0.065 Aqua Regia Digestion
Pb, Lead (ppm) 4.42 0.434 4.09 4.76 Aqua Regia Digestion
Rb, Rubidium (ppm) 110 3 106 113 Aqua Regia Digestion
Re, Rhenium (ppm) < 0.001 IND IND IND Aqua Regia Digestion
S, Sulphur (wt.%) 0.135 0.005 0.129 0.140 Aqua Regia Digestion
Sb, Antimony (ppm) 0.13 0.02 0.11 0.15 Aqua Regia Digestion
Sc, Scandium (ppm) 8.37 0.420 7.99 8.76 Aqua Regia Digestion
Se, Selenium (ppm) 0.34 0.09 0.17 0.51 Aqua Regia Digestion
Sn, Tin (ppm) 3.85 0.135 3.72 3.97 Aqua Regia Digestion
Sr, Strontium (ppm) 19.0 1.82 17.8 20.3 Aqua Regia Digestion
Tb, Terbium (ppm) 0.51 0.035 0.44 0.58 Aqua Regia Digestion
Th, Thorium (ppm) 8.07 0.99 7.26 8.88 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.292 0.020 0.278 0.306 Aqua Regia Digestion
Tl, Thallium (ppm) 0.67 0.045 0.62 0.71 Aqua Regia Digestion
U, Uranium (ppm) 3.52 0.279 3.00 4.05 Aqua Regia Digestion
V, Vanadium (ppm) 62 2.5 60 64 Aqua Regia Digestion
W, Tungsten (ppm) 6.95 1.25 5.86 8.04 Aqua Regia Digestion
Y, Yttrium (ppm) 10.7 0.75 10.1 11.3 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.72 0.030 0.66 0.77 Aqua Regia Digestion
Zn, Zinc (ppm) 78 5.3 75 82 Aqua Regia Digestion
Zr, Zirconium (ppm) 7.94 1.30 7.11 8.77 Aqua Regia Digestion
C, Carbon (wt.%) 0.047 0.019 0.030 0.063 Infrared Combustion
S, Sulphur (wt.%) 0.125 0.009 0.114 0.135 Infrared Combustion
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