OREAS 40

OREAS 40 is sourced from material located in the Buccaneer Archipelago from the Koolan Island hematite deposits. These form part of the Yampi Sound group of iron ore deposits in the West Kimberly region 130km north west of Derby in Western Australia. High grade hematite mineralisation is developed in basal conglomerates and sandstones of the Palaeoproterozoic Yampi Formation at or close to the contact with the underlying Elgee Siltstone Group.

Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Fe, Iron (wt.%) 66.72 0.390 66.45 66.99 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 4.64 0.070 4.60 4.69 Borate Fusion XRF
Al2O3, Aluminium(III) oxide (wt.%) 0.130 0.018 0.118 0.142 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.015 0.005 0.012 0.018 Borate Fusion XRF
Fe3+, Iron (ferric) (wt.%) 64.96 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 0.018 0.004 0.015 0.021 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 0.017 0.010 0.012 0.023 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.020 0.001 0.020 0.021 Borate Fusion XRF
P, Phosphorus (wt.%) 0.004 0.002 0.003 0.006 Borate Fusion XRF
S, Sulphur (wt.%) 0.008 0.002 0.006 0.010 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.050 0.004 0.047 0.052 Borate Fusion XRF
V, Vanadium (ppm) 13.0 4.0 9.0 18.0 Borate Fusion XRF
LOI1000, Loss on ignition @1000°C (wt.%) -0.248 0.051 -0.268 -0.228 Thermogravimetry
Fe2+, Iron (ferrous) (wt.%) 1.76 0.610 1.14 2.39 Acid Digestion Titration
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