OREAS 76a

OREAS 76a (10g units packaged under nitrogen) is one of a suite of six nickel sulphide CRMs (OREAS 72a to OREAS 77a) prepared from high grade massive nickel sulphide ore and barren ultramafic material from the Cosmos Nickel mine operated by Xstrata Nickel located in the Kathleen Valley area approximately 30km north of Leinster in Western Australia. Cosmos is situated within the Agnew-Wiluna portion of the Norseman-Wiluna greenstone belt. This portion of the belt is strongly attenuated and characterised by large scale faults, complex folding and typically steep dips. It is a typical Kambalda-style, komatiite associated, massive sulphide deposit representing an essentially in-situ accumulation of primary magmatic Ni-Fe sulphides with minor by-products including Cu, Co and platinum group elements (PGE’s). The Cosmos deposit comprises one discrete zone of massive and semi-massive sulphides extending over a strike length of 240m. Mineralisation is strata bound between the ovelying ultramafic unit and the underlying dolerite and felsic volcanic rocks. Continuity of grade and width of mineralisation are strong both along strike and down dip.

Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Ni, Nickel (wt.%) 7.29 0.230 7.17 7.41 4-Acid Digestion
Pt, Platinum (ppb) 701 48 674 727 Pb Fire Assay
Pd, Palladium (ppb) 403 17 392 414 Pb Fire Assay
Au, Gold (ppb) 41 5 38 44 Pb Fire Assay
Al2O3, Aluminium(III) oxide (wt.%) 1.78 0.090 1.73 1.83 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) 117 30 102 132 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 1215 31 1206 1225 Borate / Peroxide Fusion ICP
Cr, Chromium (ppm) 1283 42 1267 1299 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 2974 127 2881 3067 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 24.60 0.800 24.20 25.00 Borate / Peroxide Fusion ICP
MgO, Magnesium oxide (wt.%) 16.50 0.400 16.30 16.70 Borate / Peroxide Fusion ICP
Ni, Nickel (wt.%) 7.40 0.260 7.23 7.58 Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 17.70 0.500 16.30 19.00 Borate / Peroxide Fusion ICP
SiO2, Silicon dioxide (wt.%) 21.70 0.450 21.50 22.00 Borate / Peroxide Fusion ICP
Al2O3, Aluminium(III) oxide (wt.%) 1.71 0.105 1.64 1.79 4-Acid Digestion
As, Arsenic (ppm) 107 10 101 112 4-Acid Digestion
Co, Cobalt (ppm) 1191 48 1164 1218 4-Acid Digestion
Cr, Chromium (ppm) 872 191 730 1014 4-Acid Digestion
Cu, Copper (ppm) 2848 73 2811 2885 4-Acid Digestion
Fe, Iron (wt.%) 25.00 1.150 24.30 25.80 4-Acid Digestion
MgO, Magnesium oxide (wt.%) 16.60 0.800 16.10 17.10 4-Acid Digestion
S, Sulphur (wt.%) 17.20 2.100 15.60 18.80 4-Acid Digestion
S, Sulphur (wt.%) 18.00 0.600 17.60 18.30 Infrared Combustion
Downloads
Certificate DataPack SDS NRAM (222 KB)
Add to cart
Pricing
  • 10g Sachet
    $3.15
Specifications
CRM Group