Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 171 is a supergene manganese ore matrix-matched certified reference material (MMCRM) prepared and certified by Ore Research & Exploration Pty Ltd. 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. A portion (22%) of barren siltstone sourced from a quarry north of Melbourne, Australia was added to lower the grade. OREAS 171 is one of a suite of four Mn ore MMCRMs certified by borate fusion XRF covering a Mn grade range of 35-46%.
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
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Mn, Manganese (wt.%) | 35.10 | 0.167 | 35.02 | 35.18 | Borate Fusion XRF |
SiO2, Silicon dioxide (wt.%) | 24.82 | 0.170 | 24.74 | 24.90 | Borate Fusion XRF |
Fe, Iron (wt.%) | 3.66 | 0.034 | 3.64 | 3.68 | Borate Fusion XRF |
Al2O3, Aluminium(III) oxide (wt.%) | 7.32 | 0.123 | 7.25 | 7.39 | Borate Fusion XRF |
BaO, Barium oxide (wt.%) | 0.247 | 0.011 | 0.241 | 0.253 | Borate Fusion XRF |
CaO, Calcium oxide (wt.%) | 0.081 | 0.007 | 0.078 | 0.084 | Borate Fusion XRF |
K2O, Potassium oxide (wt.%) | 2.05 | 0.030 | 2.04 | 2.07 | Borate Fusion XRF |
MgO, Magnesium oxide (wt.%) | 0.217 | 0.016 | 0.208 | 0.226 | Borate Fusion XRF |
Na2O, Sodium oxide (wt.%) | 0.236 | 0.015 | 0.227 | 0.244 | Borate Fusion XRF |
P, Phosphorus (ppm) | 663 | 24 | 648 | 677 | Borate Fusion XRF |
TiO2, Titanium dioxide (wt.%) | 0.336 | 0.009 | 0.331 | 0.341 | Borate Fusion XRF |
V2O5, Vanadium(V) oxide (ppm) | 418 | 45 | 386 | 450 | Borate Fusion XRF |
LOI1000, Loss On Ignition @1000°C (wt.%) | 10.54 | 0.148 | 10.45 | 10.63 | Thermogravimetry |