OREAS 76b

OREAS 76b is one of a suite of seven nickel sulphide CRMs prepared from high grade massive nickel sulphide ore and barren ultramafic material sourced from Xstrata Nickel’s Prospero and Tapinos Nickel mines, located in the Kathleen Valley area approximately 30km north of Leinster in Western Australia within the Agnew-Wiluna portion of the Norseman-Wiluna greenstone belt. It is a typical komatiite-associated, massive sulphide deposit representing an in-situ accumulation of massive and semi-massive primary magmatic Ni-Fe sulphides with minor by-products including Cu, Co and platinum group elements (PGE’s).

Nineteen commercial analytical laboratories participated in the program employing the following methods:

  • Lithium borate fusion with X-ray fluorescence;
  • Sodium peroxide fusion or lithium borate fusion with full ICP-OES and ICP-MS suites;
  • Four acid digestion with full ICP-OES and ICP-MS suites;
  • Infra-red combustion furnace for sulphur;
  • Thermogravimetry for Loss On Ignition at 1000 degrees Celsius;

Due to the presence of reactive sulphides OREAS 76b has been packaged under nitrogen and is available in single-use 10g units in laminated foil pouches.

Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Ni, Nickel (wt.%) 7.62 0.209 7.52 7.72 4-Acid Digestion
Co, Cobalt (ppm) 1067 50 1043 1090 4-Acid Digestion
As, Arsenic (ppm) 1394 88 1341 1446 4-Acid Digestion
Al, Aluminium (wt.%) 2.58 0.047 2.55 2.61 Borate Fusion XRF
Ca, Calcium (wt.%) 3.11 0.034 3.11 3.12 Borate Fusion XRF
Co, Cobalt (ppm) 1103 13 1092 1113 Borate Fusion XRF
Cr, Chromium (ppm) 663 40 635 691 Borate Fusion XRF
Fe, Iron (wt.%) 21.76 0.316 21.69 21.83 Borate Fusion XRF
K, Potassium (wt.%) 0.474 0.011 0.466 0.482 Borate Fusion XRF
Mg, Magnesium (wt.%) 5.80 0.088 5.74 5.86 Borate Fusion XRF
Mn, Manganese (wt.%) 0.079 0.003 0.077 0.081 Borate Fusion XRF
Na, Sodium (wt.%) 0.510 0.019 0.486 0.534 Borate Fusion XRF
Ni, Nickel (ppm) 77800 1785 76462 79138 Borate Fusion XRF
P, Phosphorus (wt.%) 0.014 0.001 0.013 0.015 Borate Fusion XRF
Si, Silicon (wt.%) 13.74 0.192 13.65 13.84 Borate Fusion XRF
Ti, Titanium (wt.%) 0.103 0.005 0.101 0.106 Borate Fusion XRF
Al, Aluminium (wt.%) 2.54 0.125 2.47 2.61 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 1405 91 1351 1459 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 154 6 150 158 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 3.10 0.118 3.05 3.16 Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 27.9 1.03 27.4 28.5 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 1112 57 1075 1148 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 621 65 580 661 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 2.38 0.184 2.23 2.54 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 2262 48 2233 2292 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 1.59 0.131 1.46 1.73 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 0.95 0.068 0.90 1.00 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 0.44 0.05 0.40 0.48 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 22.12 0.741 21.71 22.54 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 5.94 0.517 5.43 6.46 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 1.75 0.27 1.47 2.03 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.32 0.04 0.29 0.36 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 16.0 0.95 14.9 17.2 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 24.2 1.46 22.9 25.5 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 5.85 0.184 5.74 5.95 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.079 0.004 0.077 0.082 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 2.94 0.149 2.79 3.08 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 10.6 0.65 9.8 11.3 Borate / Peroxide Fusion ICP
Ni, Nickel (ppm) 76649 1608 75663 77635 Borate / Peroxide Fusion ICP
Pb, Lead (ppm) 42.6 4.13 38.7 46.5 Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 3.06 0.227 2.76 3.36 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 23.1 1.81 21.5 24.7 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 15.45 0.449 15.06 15.84 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 5.81 0.71 5.12 6.49 Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 14.02 0.274 13.89 14.14 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 1.94 0.131 1.88 2.00 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 43.8 4.8 39.4 48.3 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.29 0.018 0.27 0.30 Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 6.48 0.293 6.33 6.64 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 2.05 0.162 1.93 2.16 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 46.1 6.8 41.4 50.8 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 8.93 0.624 8.43 9.43 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 0.94 0.11 0.86 1.02 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 170 12 161 179 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 48.5 9.4 41.1 55.9 Borate / Peroxide Fusion ICP
Ag, Silver (ppm) 1.14 0.081 1.09 1.19 4-Acid Digestion
Al, Aluminium (wt.%) 2.63 0.136 2.57 2.70 4-Acid Digestion
Be, Beryllium (ppm) 0.59 0.08 0.55 0.64 4-Acid Digestion
Bi, Bismuth (ppm) 2.47 0.124 2.41 2.53 4-Acid Digestion
Ca, Calcium (wt.%) 3.09 0.079 3.05 3.12 4-Acid Digestion
Cd, Cadmium (ppm) 0.95 0.10 0.89 1.01 4-Acid Digestion
Ce, Cerium (ppm) 30.1 2.97 28.1 32.1 4-Acid Digestion
Cu, Copper (ppm) 2278 100 2227 2330 4-Acid Digestion
Fe, Iron (wt.%) 21.84 0.895 21.34 22.33 4-Acid Digestion
Ga, Gallium (ppm) 6.34 0.368 6.10 6.57 4-Acid Digestion
Hf, Hafnium (ppm) 1.45 0.099 1.38 1.52 4-Acid Digestion
In, Indium (ppm) 0.095 0.005 0.092 0.099 4-Acid Digestion
K, Potassium (wt.%) 0.500 0.017 0.491 0.508 4-Acid Digestion
La, Lanthanum (ppm) 17.1 1.9 15.9 18.3 4-Acid Digestion
Li, Lithium (ppm) 22.5 1.78 21.5 23.4 4-Acid Digestion
Mg, Magnesium (wt.%) 5.85 0.207 5.75 5.95 4-Acid Digestion
Mn, Manganese (wt.%) 0.076 0.004 0.074 0.079 4-Acid Digestion
Na, Sodium (wt.%) 0.541 0.020 0.531 0.551 4-Acid Digestion
Nb, Niobium (ppm) 3.68 0.40 3.43 3.93 4-Acid Digestion
P, Phosphorus (wt.%) 0.011 0.001 0.010 0.013 4-Acid Digestion
Pb, Lead (ppm) 44.9 3.56 42.7 47.1 4-Acid Digestion
Rb, Rubidium (ppm) 24.8 1.91 23.5 26.0 4-Acid Digestion
Re, Rhenium (ppm) 0.015 0.002 0.013 0.017 4-Acid Digestion
Sb, Antimony (ppm) 6.27 0.495 5.96 6.57 4-Acid Digestion
Sc, Scandium (ppm) 6.46 0.65 6.07 6.85 4-Acid Digestion
Se, Selenium (ppm) 9.11 1.64 7.92 10.29 4-Acid Digestion
Sn, Tin (ppm) 1.49 0.112 1.41 1.57 4-Acid Digestion
Sr, Strontium (ppm) 44.4 2.88 42.6 46.2 4-Acid Digestion
Ta, Tantalum (ppm) 0.30 0.007 0.29 0.30 4-Acid Digestion
Te, Tellurium (ppm) 0.90 0.13 0.81 0.98 4-Acid Digestion
Th, Thorium (ppm) 7.19 0.318 6.97 7.42 4-Acid Digestion
Ti, Titanium (wt.%) 0.103 0.005 0.101 0.106 4-Acid Digestion
Tl, Thallium (ppm) 1.00 0.090 0.96 1.04 4-Acid Digestion
U, Uranium (ppm) 2.19 0.159 2.10 2.29 4-Acid Digestion
V, Vanadium (ppm) 45.9 2.92 44.3 47.6 4-Acid Digestion
W, Tungsten (ppm) 3.84 0.286 3.71 3.97 4-Acid Digestion
Y, Yttrium (ppm) 7.98 0.591 7.61 8.34 4-Acid Digestion
Zn, Zinc (ppm) 178 11 172 184 4-Acid Digestion
Zr, Zirconium (ppm) 49.4 2.84 48.1 50.6 4-Acid Digestion
S, Sulphur (wt.%) 15.18 0.536 14.84 15.53 Infrared Combustion
LOI1000, Loss on ignition @1000°C (wt.%) 8.05 0.112 7.98 8.12 Thermogravimetry
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Pricing
  • 10g Sachet
    $3.60
Specifications
CRM Group