OREAS 170b 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.
| CRM Code |
Principle Certified Values |
State |
Matrix |
Mineralization |
| OREAS 170b |
Mn 46.06% |
SiO2 9.49% |
Fe2O3 7.04% |
oxide |
manganiferous sedimentary |
shallow marine sediment hosted |