OREAS 76b
primary
mineralised ultramafic
komatiite-hosted nickel sulphide
OREAS 76b
SKU: 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.
Specifications
- State: primary
- Matrix: mineralised ultramafic
- Mineralisation: komatiite-hosted nickel sulphide
- CRM Group: Ni sulphide ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL 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 |
Product Specifications
State
primary
Matrix
mineralised ultramafic
Mineralisation
komatiite-hosted nickel sulphide
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 30.1 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 17.1 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 7.98 | - | - | - | 4-Acid Digestion |
SD = Standard Deviation | CL = 95% Confidence Limits
Methods: AR = Aqua Regia, 4-Acid = 4-Acid Digestion, LBF = Lithium Borate Fusion, FA/AAS = Fire Assay with Atomic Absorption, LECO = LECO Combustion Analysis
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