OREAS 460 is an ore grade, rare earth element (TREO = 0.53%) matrix-matched certified reference material (MMCRM) prepared and certified by Ore Research & Exploration. The materials constituting OREAS 460 were sourced from both a quarry north of Melbourne (weathered barren siltstone) and Lynas Corporation's Mount Weld Project (the ‘Central Lanthanide Deposit') which is located 35 kilometres south of Laverton in Western Australia. The Mount Weld source materials (waste, low and medium grade REE ores) were found to be highly hygroscopic to the extent that significant analytical errors would likely result during analysis unless strict moisture handling procedures were adhered. To avoid this complication, the hygroscopic property was destroyed by roasting the materials at 900°C for 2 hours. Following re-equilibration of the materials to laboratory atmosphere the hygroscopic moisture content was deemed acceptable (~0.5% H2O-).
OREAS 460 is one of six MMCRMs ranging TREO 0.53 - 9.88% and contains 110 certified values (and 50 indicative values) including REE's, majors and traces by fusion XRF, fusion ICP and 4-acid digestion.
OREAS 460 is a SuperCRM®
| CRM Code |
Principle Certified Values |
State |
Matrix |
Mineralization |
| OREAS 460 |
CeO2 2209ppm |
La2O3 1606ppm |
Nd2O3 991ppm |
oxide |
lateritic |
carbonatite |