OREAS 170b

OREAS 170b is a high grade supergene manganese ore matrix-matched certified reference material (MMCRM) prepared and certified by Ore Research & Exploration. The material was sourced from the Groote Eylandt Mining Company Pty Ltd (GEMCO) Mn deposit which is hosted within a shallow dipping Lower Cretaceous sedimentary rock unit. Groote Eylandt is in the Gulf of Carpentaria off the coast of Australia’s Northern Territory. OREAS 170a is one of two MMCRMs characterised for MnO, Fe2O3, SiO2, Al2O3, MgO, CaO, TiO2, K2O, P2O5, Na2O and LOI via lithium borate fusion with XRF finish.

Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Mn, Manganese (wt.%) 46.06 0.330 45.82 46.28 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 9.49 0.060 9.45 9.53 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 7.04 0.080 6.99 7.10 Borate Fusion XRF
Al2O3, Aluminium(III) oxide (wt.%) 3.90 0.060 3.86 3.94 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.270 0.007 0.265 0.275 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 1.80 0.040 1.77 1.83 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 0.329 0.018 0.316 0.342 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 59.46 0.430 59.16 59.75 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 0.318 0.022 0.301 0.335 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.195 0.005 0.192 0.199 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.189 0.004 0.186 0.191 Borate Fusion XRF
LOI1000, Loss on ignition @1000°C (wt.%) 11.95 0.150 11.84 12.06 Thermogravimetry
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CRM Group