OREAS 180b

OREAS 180b has been prepared from a blend of Ni-Co lateritic ores and barren siliclastic sedimentary rock sourced from Victoria, Australia. The Ni-Co lateritic ores were sourced predominantly from the Bulong deposit located 35km east of Kalgoorlie in Western Australia with minor additions of Ni-Co lateritic ores from other regions. The Bulong deposit formed from prolonged lateritic weathering of Archaean (Yilgarn Craton) olivine rich ultramafic/komatiite flows. Grades of >1% Ni were generated in zones of more intense weathering associated with faulting and bedrock alteration. The Ni-Co nontronitic (Fe-Ni smectite clays) siliceous ores at Bulong formed with a goethitic overprint in the upper laterite profile.

Twenty-six commercial analytical laboratories participated in the program to certify the elements reported below:

  • Lithium borate fusion whole rock analysis package with X-ray fluorescence
  • Thermogravimetry: Loss on Ignition (LOI) at 1000 °C
  • Sodium peroxide/borate fusion with full suite ICP-OES or ICP-MS elemental packages
  • Total C and S by infrared combustion furnace

Homogeneity was assessed using XRF analysis on 12 pulp samples (20 g each) from six sampling units. An ANOVA test was performed to compare within- and between-unit variances, providing a statistical measure of uniformity and confirming that all units belong to the same population.

Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Ni, Nickel (wt.%) 0.329 0.007 0.320 0.338 Borate Fusion XRF
Co, Cobalt (ppm) 261 17 241 282 Borate Fusion XRF
Sc, Scandium (ppm) 21.4 1.34 19.6 23.1 Borate / Peroxide Fusion ICP
Al2O3, Aluminium(III) oxide (wt.%) 8.60 0.110 8.51 8.68 Borate Fusion XRF
BaO, Barium oxide (ppm) 240 41 156 324 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.969 0.011 0.958 0.981 Borate Fusion XRF
Cr2O3, Chromium(III) oxide (wt.%) 0.688 0.014 0.672 0.703 Borate Fusion XRF
Fe, Iron (wt.%) 19.21 0.200 19.02 19.39 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 0.717 0.010 0.707 0.728 Borate Fusion XRF
Mg, Magnesium (wt.%) 5.34 0.063 5.30 5.39 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.134 0.005 0.128 0.140 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 0.281 0.049 0.240 0.322 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.038 0.005 0.032 0.044 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 38.99 0.237 38.70 39.27 Borate Fusion XRF
Sn, Tin (ppm) < 50 IND IND IND Borate Fusion XRF
SO3, Sulphur trioxide (wt.%) 0.165 0.010 0.153 0.177 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.335 0.013 0.324 0.347 Borate Fusion XRF
V2O5, Vanadium(V) oxide (ppm) 178 11 148 208 Borate Fusion XRF
Zn, Zinc (ppm) 76 13 61 91 Borate Fusion XRF
LOI1000, Loss on ignition @1000 °C (wt.%) 12.30 0.404 12.07 12.53 Thermogravimetry
Al, Aluminium (wt.%) 4.50 0.078 4.40 4.60 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 114 12 102 126 Borate / Peroxide Fusion ICP
B, Boron (ppm) 353 46 304 402 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 212 11 202 222 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 1.11 0.108 0.86 1.35 Borate / Peroxide Fusion ICP
Bi, Bismuth (ppm) 4.98 0.57 3.93 6.03 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.660 0.048 0.595 0.724 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) < 10.0 IND IND IND Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 28.7 2.66 25.7 31.7 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 247 11 230 263 Borate / Peroxide Fusion ICP
Cr, Chromium (wt.%) 0.467 0.019 0.453 0.482 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 2.85 0.263 2.54 3.17 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 48.0 3.96 42.8 53.3 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 1.99 0.089 1.81 2.16 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 1.15 0.064 1.00 1.29 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 0.53 0.043 0.43 0.62 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 19.18 0.392 18.70 19.66 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 9.58 0.913 8.30 10.86 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 2.01 0.146 1.79 2.24 Borate / Peroxide Fusion ICP
Ge, Germanium (ppm) 1.10 0.15 0.80 1.41 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.40 0.020 0.34 0.45 Borate / Peroxide Fusion ICP
In, Indium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 0.614 0.051 0.571 0.658 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 12.8 1.19 11.1 14.4 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 15.5 2.1 12.4 18.6 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.18 0.02 0.14 0.21 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 5.24 0.106 5.12 5.37 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.104 0.003 0.098 0.109 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 2.35 0.46 1.99 2.71 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 11.4 0.49 10.3 12.4 Borate / Peroxide Fusion ICP
Ni, Nickel (wt.%) 0.325 0.009 0.316 0.334 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 3.23 0.271 2.85 3.62 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 33.4 1.96 31.8 35.0 Borate / Peroxide Fusion ICP
Re, Rhenium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 0.061 0.011 0.049 0.074 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 3.44 0.79 2.08 4.80 Borate / Peroxide Fusion ICP
Se, Selenium (ppm) < 20.0 IND IND IND Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 18.09 0.444 17.58 18.59 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 2.18 0.151 1.94 2.41 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 51 3.4 47 55 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.33 0.030 0.27 0.38 Borate / Peroxide Fusion ICP
Te, Tellurium (ppm) < 1.00 IND IND IND Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 5.12 0.261 4.72 5.51 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.199 0.007 0.190 0.208 Borate / Peroxide Fusion ICP
Tl, Thallium (ppm) < 0.50 IND IND IND Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.17 0.03 0.13 0.21 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 1.25 0.13 1.07 1.42 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 101 6 94 107 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 24.5 2.37 21.5 27.5 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 10.8 0.34 10.1 11.6 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 1.15 0.12 1.02 1.29 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 84 10 72 96 Borate / Peroxide Fusion ICP
C, Carbon (wt.%) 2.04 0.046 2.00 2.07 Infrared Combustion
S, Sulphur (wt.%) 0.062 0.005 0.054 0.069 Infrared Combustion
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