OREAS 904
Specs
- CRM Type: oxide
- Matrix: argillaceous sandstone
- Mineralisation: sediment hosted
CRM Group
Price
- 10g = $3.00
- 60g = $9.35
- 1kg = $155.00
OREAS 904 is a medium grade oxide copper ore certified reference material. It is one of a suite of four transitional to oxide copper CRMs prepared from CST's Lady Annie Mine, located 120 kms northwest of Mount Isa, Queensland, Australia.
Mineralisation at Lady Annie is hosted in dolomitic, carbonaceous and argillaceous sandstones and siltstones. The oxide deposits consist primarily of near surface malachite mineralisation with minor cuprite, chrysocolla and chalcocite extending from surface to a depth of 60 to 100 m. The oxide copper deposit is underlain by deeper transition and sulphide mineralisation. The primary copper sulphide mineralisation at depth is dominated by chalcocite and chalcopyrite and appears to be structurally controlled, being commonly associated with fault-related silicification.
| Constituent | Certified Value | 1SD | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Copper, Cu (wt.%) | 0.612 | 0.021 | 0.601 | 0.622 | 4-Acid Digest |
| Copper Soluble, Cu-Sol (wt.%) | 0.519 | 0.028 | 0.503 | 0.534 | Miscellaneous |
| Gold, Au (ppb) | 45 | 4.3 | 43 | 47 | Pb Fire Assay |