Specifications
-
CRM State:
-
Matrix:
-
Mineralisation:
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:
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 |