OREAS 170a 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.%)||45.06||0.360||44.79||45.32||Borate Fusion XRF|
|SiO2, Silicon dioxide (wt.%)||11.34||0.070||11.30||11.39||Borate Fusion XRF|
|Fe2O3, Iron(III) oxide (wt.%)||6.49||0.100||6.41||6.56||Borate Fusion XRF|
|Al2O3, Aluminium(III) oxide (wt.%)||4.44||0.050||4.41||4.47||Borate Fusion XRF|
|CaO, Calcium oxide (wt.%)||0.090||0.004||0.088||0.092||Borate Fusion XRF|
|K2O, Potassium oxide (wt.%)||1.70||0.030||1.67||1.72||Borate Fusion XRF|
|MgO, Magnesium oxide (wt.%)||0.222||0.021||0.207||0.237||Borate Fusion XRF|
|MnO, Manganese oxide (wt.%)||58.17||0.465||57.83||58.51||Borate Fusion XRF|
|Na2O, Sodium oxide (wt.%)||0.276||0.034||0.034||0.302||Borate Fusion XRF|
|P2O5, Phosphorus(V) oxide (wt.%)||0.152||0.005||0.149||0.155||Borate Fusion XRF|
|TiO2, Titanium dioxide (wt.%)||0.179||0.005||0.176||0.181||Borate Fusion XRF|
|LOI1000, Loss On Ignition @1000°C (wt.%)||12.14||0.070||12.09||12.19||Thermogravimetry|
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