Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 172 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 small portion (4.6%) of barren siltstone sourced from a quarry north of Melbourne, Australia was added to lower the grade. OREAS 172 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.%) | 42.75 | 0.214 | 42.64 | 42.87 | Borate Fusion XRF |
SiO2, Silicon dioxide (wt.%) | 14.09 | 0.085 | 14.05 | 14.14 | Borate Fusion XRF |
Fe, Iron (wt.%) | 3.83 | 0.040 | 3.80 | 3.85 | Borate Fusion XRF |
Al2O3, Aluminium(III) oxide (wt.%) | 5.80 | 0.058 | 5.76 | 5.83 | Borate Fusion XRF |
BaO, Barium oxide (wt.%) | 0.285 | 0.012 | 0.279 | 0.292 | Borate Fusion XRF |
CaO, Calcium oxide (wt.%) | 0.095 | 0.007 | 0.092 | 0.099 | Borate Fusion XRF |
K2O, Potassium oxide (wt.%) | 1.89 | 0.032 | 1.87 | 1.91 | Borate Fusion XRF |
MgO, Magnesium oxide (wt.%) | 0.141 | 0.014 | 0.133 | 0.149 | Borate Fusion XRF |
Na2O, Sodium oxide (wt.%) | 0.273 | 0.016 | 0.264 | 0.281 | Borate Fusion XRF |
P, Phosphorus (ppm) | 752 | 17 | 743 | 761 | Borate Fusion XRF |
TiO2, Titanium dioxide (wt.%) | 0.236 | 0.009 | 0.233 | 0.240 | Borate Fusion XRF |
V2O5, Vanadium(V) oxide (ppm) | 501 | 45 | 467 | 536 | Borate Fusion XRF |
LOI1000, Loss On Ignition @1000°C (wt.%) | 12.04 | 0.156 | 11.95 | 12.13 | Thermogravimetry |