OREAS 170a
SKU: 170a
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.
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.%) | 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 | 0.251 | 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 |
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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