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OREAS 613
OREAS 613 is a certified reference material prepared from a rhyodacite host blended with Ag-rich ore from Bowdens, silver concentrate, and Cu–Au concentrates from Mt Carlton and DeGrussa with a minor high-Au component from Cerro Moro.
The blend replicates a felsic volcanic host carrying epithermal Ag–Au mineralisation with added Cu-sulfide tenor, making it well-suited for calibration and routine QA/QC of multi-element geochemical methods (e.g., fire assay for Au/Ag, multi-acid digestion ICP-OES/MS for base metals) across exploration and metallurgical programs.
OREAS 613 has been characterized using the following methods:
- Gold via 25-50g fire assay with AAS or ICP-OES finish
- Silver via 25-50g fire assay with Gravimetric finish
- Gold via 10-40g aqua regia digestion with ICP-MS finish or AAS finish
- Sulphur by infra-red combustion analysis
- 4-Acid digestion for full elemental suite ICP-OES/MS finish
- Aqua regia digestion for full elemental suite ICP-OES finish or AAS finish
Certified values for applicable analytes are operationally defined for each method, with results under OREAS ISO 17034 scope of accreditation.
Note: Analyte values are indicative only and may change when certified.
| Analyte | Indicative Value | 1SD | Expanded Uncertainty Low | Expanded Uncertainty High | Method |
|---|---|---|---|---|---|
| Ag, Silver (ppm) | 300 | TBD | TBD | TBD | Pb Fire Assay |
| Au, Gold (ppm) | 5.00 | TBD | TBD | TBD | Pb Fire Assay |
| Cu, Copper (ppm) | 10000 | TBD | TBD | TBD | 4-Acid Digestion |
| S, Sulphur (wt.%) | 2.54 | TBD | TBD | TBD | Infrared Combustion |
| As, Arsenic (ppm) | 322 | TBD | TBD | TBD | 4-Acid Digestion |
| Pb, Lead (wt.%) | 0.120 | TBD | TBD | TBD | 4-Acid Digestion |
| Zn, Zinc (wt.%) | 0.150 | TBD | TBD | TBD | 4-Acid Digestion |
Downloads
Certificate DataPack SDS NRAM (226 KB)Stock
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