OREAS 172
SKU: 172
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%.
Specifications
- State: oxide
- Matrix: manganiferous sedimentary
- Mineralisation: shallow marine sediment hosted
- CRM Group: Mn ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| 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 |
Product Specifications
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|
SD = Standard Deviation | CL = 95% Confidence Limits
Methods: AR = Aqua Regia, 4-Acid = 4-Acid Digestion, LBF = Lithium Borate Fusion, FA/AAS = Fire Assay with Atomic Absorption, LECO = LECO Combustion Analysis
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