Medium grade uranium reference material OREAS 105 was prepared from samples sourced from the Crocker Well Project located in the Olary District of the Curnamona Province of South Australia. Uranium mineralization occurs within basement intrusives primarily as thorian brannerite as a disseminated accessory mineral or in fractures, breccias or quartz veins in sodic plagioclase rich mesoproterozoic granitoids and gneisses. In the east of the deposit uranium occurs as davidite. The Crocker Well material was blended with barren rhyodacite to achieve the desired grade of uranium in OREAS 105.
| CRM Code |
Principle Certified Values |
State |
Matrix |
Mineralization |
| OREAS 105 |
U 532ppm |
Th 369ppm |
La 51ppm |
primary |
granitic/gneisses |
epithermal |