Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 196 has been prepared from a blend of classic Ni-Co laterites, comprising goethite-hosted limonite ores and garnierite/serpentine-rich saprolite ores sourced from the north-eastern Goldfields of Western Australia and the north-east of South Sulawesi Province, Indonesia. Mineralisation has developed through the weathering of ultramafic rocks, including komatiite, peridotite and dunite. Nickel is concentrated in both the limonite and saprolite zones. The limonite zone, rich in goethite, hosts most of the cobalt content. The saprolite zone contains the majority of the nickel, primarily occurring in silicate minerals such as garnierite, serpentine, and smectite. Secondary minerals, including chromite, magnetite, hematite, and manganese oxides (e.g. asbolane or wad), are also present.
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.%) | 2.09 | 0.041 | 2.06 | 2.11 | Borate Fusion XRF |
Co, Cobalt (ppm) | 602 | 9 | 589 | 615 | Borate Fusion XRF |
Sc, Scandium (ppm) | 22.0 | 1.44 | 20.3 | 23.7 | Borate / Peroxide Fusion ICP |
Al2O3, Aluminium(III) oxide (wt.%) | 3.56 | 0.077 | 3.48 | 3.63 | Borate Fusion XRF |
CaO, Calcium oxide (wt.%) | 0.311 | 0.006 | 0.301 | 0.322 | Borate Fusion XRF |
Cr2O3, Chromium(III) oxide (wt.%) | 1.35 | 0.024 | 1.33 | 1.37 | Borate Fusion XRF |
Cu, Copper (ppm) | < 50 | IND | IND | IND | Borate Fusion XRF |
Fe, Iron (wt.%) | 19.28 | 0.133 | 19.13 | 19.42 | Borate Fusion XRF |
K2O, Potassium oxide (wt.%) | 0.038 | 0.005 | 0.031 | 0.045 | Borate Fusion XRF |
Mg, Magnesium (wt.%) | 7.64 | 0.096 | 7.57 | 7.72 | Borate Fusion XRF |
MnO, Manganese oxide (wt.%) | 0.494 | 0.011 | 0.483 | 0.505 | Borate Fusion XRF |
P2O5, Phosphorus(V) oxide (wt.%) | 0.008 | 0.003 | 0.004 | 0.012 | Borate Fusion XRF |
SiO2, Silicon dioxide (wt.%) | 41.98 | 0.695 | 41.53 | 42.43 | Borate Fusion XRF |
Sn, Tin (ppm) | < 50 | IND | IND | IND | Borate Fusion XRF |
SO3, Sulphur trioxide (wt.%) | 0.504 | 0.042 | 0.473 | 0.535 | Borate Fusion XRF |
TiO2, Titanium dioxide (wt.%) | 0.139 | 0.011 | 0.128 | 0.149 | Borate Fusion XRF |
V2O5, Vanadium(V) oxide (ppm) | 171 | 14 | 142 | 201 | Borate Fusion XRF |
Zn, Zinc (ppm) | 432 | 22 | 409 | 454 | Borate Fusion XRF |
LOI1000, Loss on ignition @1000 °C (wt.%) | 9.51 | 1.82 | 8.61 | 10.41 | Thermogravimetry |
Al, Aluminium (wt.%) | 1.83 | 0.039 | 1.79 | 1.87 | Borate / Peroxide Fusion ICP |
Ba, Barium (ppm) | 34.9 | 3.11 | 30.9 | 39.0 | Borate / Peroxide Fusion ICP |
Be, Beryllium (ppm) | < 1.00 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Bi, Bismuth (ppm) | < 0.10 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Ca, Calcium (wt.%) | 0.219 | 0.030 | 0.197 | 0.241 | Borate / Peroxide Fusion ICP |
Cd, Cadmium (ppm) | < 10.0 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Ce, Cerium (ppm) | 2.88 | 0.269 | 2.35 | 3.40 | Borate / Peroxide Fusion ICP |
Co, Cobalt (ppm) | 574 | 28 | 550 | 598 | Borate / Peroxide Fusion ICP |
Cr, Chromium (wt.%) | 0.900 | 0.030 | 0.873 | 0.927 | Borate / Peroxide Fusion ICP |
Cs, Caesium (ppm) | 0.19 | 0.05 | 0.10 | 0.28 | Borate / Peroxide Fusion ICP |
Cu, Copper (ppm) | 45.0 | 3.24 | 40.2 | 49.8 | Borate / Peroxide Fusion ICP |
Dy, Dysprosium (ppm) | 1.58 | 0.20 | 1.36 | 1.80 | Borate / Peroxide Fusion ICP |
Er, Erbium (ppm) | 0.94 | 0.060 | 0.80 | 1.07 | Borate / Peroxide Fusion ICP |
Eu, Europium (ppm) | 0.51 | 0.07 | 0.41 | 0.61 | Borate / Peroxide Fusion ICP |
Fe, Iron (wt.%) | 18.74 | 0.342 | 18.32 | 19.16 | Borate / Peroxide Fusion ICP |
Ga, Gallium (ppm) | 4.22 | 0.92 | 2.77 | 5.67 | Borate / Peroxide Fusion ICP |
Gd, Gadolinium (ppm) | 1.73 | 0.127 | 1.48 | 1.98 | Borate / Peroxide Fusion ICP |
Ge, Germanium (ppm) | 2.40 | 0.45 | 1.58 | 3.23 | Borate / Peroxide Fusion ICP |
Ho, Holmium (ppm) | 0.32 | 0.019 | 0.27 | 0.36 | Borate / Peroxide Fusion ICP |
In, Indium (ppm) | < 0.10 | IND | IND | IND | Borate / Peroxide Fusion ICP |
La, Lanthanum (ppm) | 10.4 | 0.49 | 9.6 | 11.2 | Borate / Peroxide Fusion ICP |
Lu, Lutetium (ppm) | 0.12 | 0.03 | 0.08 | 0.17 | Borate / Peroxide Fusion ICP |
Mg, Magnesium (wt.%) | 7.39 | 0.120 | 7.20 | 7.58 | Borate / Peroxide Fusion ICP |
Mn, Manganese (wt.%) | 0.368 | 0.015 | 0.356 | 0.379 | Borate / Peroxide Fusion ICP |
Nd, Neodymium (ppm) | 9.25 | 0.385 | 8.19 | 10.31 | Borate / Peroxide Fusion ICP |
Ni, Nickel (wt.%) | 2.02 | 0.106 | 1.94 | 2.10 | Borate / Peroxide Fusion ICP |
Pr, Praseodymium (ppm) | 2.39 | 0.108 | 2.18 | 2.59 | Borate / Peroxide Fusion ICP |
Rb, Rubidium (ppm) | 1.69 | 0.20 | 1.29 | 2.09 | Borate / Peroxide Fusion ICP |
Re, Rhenium (ppm) | < 0.10 | IND | IND | IND | Borate / Peroxide Fusion ICP |
S, Sulphur (wt.%) | 0.178 | 0.022 | 0.161 | 0.196 | Borate / Peroxide Fusion ICP |
Se, Selenium (ppm) | < 20.0 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Si, Silicon (wt.%) | 19.22 | 0.568 | 18.68 | 19.76 | Borate / Peroxide Fusion ICP |
Sm, Samarium (ppm) | 1.63 | 0.150 | 1.37 | 1.89 | Borate / Peroxide Fusion ICP |
Sr, Strontium (ppm) | 19.7 | 2.2 | 16.5 | 22.9 | Borate / Peroxide Fusion ICP |
Tb, Terbium (ppm) | 0.25 | 0.025 | 0.21 | 0.30 | Borate / Peroxide Fusion ICP |
Te, Tellurium (ppm) | < 1.00 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Th, Thorium (ppm) | 0.19 | 0.03 | 0.16 | 0.21 | Borate / Peroxide Fusion ICP |
Ti, Titanium (wt.%) | 0.081 | 0.004 | 0.075 | 0.087 | Borate / Peroxide Fusion ICP |
Tl, Thallium (ppm) | < 0.50 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Tm, Thulium (ppm) | 0.13 | 0.03 | 0.09 | 0.17 | Borate / Peroxide Fusion ICP |
V, Vanadium (ppm) | 94 | 7.7 | 85 | 102 | Borate / Peroxide Fusion ICP |
W, Tungsten (ppm) | 2.21 | 0.51 | 1.62 | 2.80 | Borate / Peroxide Fusion ICP |
Y, Yttrium (ppm) | 8.64 | 0.413 | 7.98 | 9.30 | Borate / Peroxide Fusion ICP |
Yb, Ytterbium (ppm) | 0.84 | 0.09 | 0.67 | 1.02 | Borate / Peroxide Fusion ICP |
Zn, Zinc (ppm) | 411 | 34 | 385 | 437 | Borate / Peroxide Fusion ICP |
C, Carbon (wt.%) | 0.563 | 0.022 | 0.543 | 0.582 | Infrared Combustion |
S, Sulphur (wt.%) | 0.182 | 0.011 | 0.171 | 0.194 | Infrared Combustion |