OREAS 614
SKU: 614
OREAS 614 is a certified reference material produced from a rhyodacite
host blended with Bowdens Ag–Pb–Zn ore, a silver concentrate, and Cu–Au
concentrates from DeGrussa and Mt Carlton.
The matrix replicates a felsic volcanic host carrying epithermal Ag–Au
mineralisation with added Cu-sulfide tenor, making OREAS 614 well-suited for
calibration and routine QA/QC of multi-element geochemical methods (fire assay
for Au/Ag; multi-acid digestion ICP-OES/MS for base metals; S/As/Pb/Zn
pathfinders) in exploration and metallurgical workflows.
OREAS 614 has been characterized using the following methods:
Gold via 25-50g fire assay with AAS or ICP-OES finis
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.
Specifications
- State: primary
- Matrix: rhyodacite
- Mineralisation: low sulphidation epithermal
- CRM Group: Au >1 ppm, Au-Cu ore, Au-Ag ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Ag, Silver (ppm) | 500 | TBD | TBD | TBD | Pb Fire Assay |
| Au, Gold (ppm) | 1.45 | TBD | TBD | TBD | Pb Fire Assay |
| Cu, Copper (ppm) | 20000 | TBD | TBD | TBD | 4-Acid Digestion |
| S, Sulphur (wt.%) | 3.65 | TBD | TBD | TBD | Infrared Combustion |
| As, Arsenic (ppm) | 503 | TBD | TBD | TBD | 4-Acid Digestion |
| Pb, Lead (wt.%) | 0.130 | TBD | TBD | TBD | 4-Acid Digestion |
| Zn, Zinc (wt.%) | 0.210 | TBD | TBD | TBD | 4-Acid Digestion |
Product Specifications
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|
SD = Standard Deviation | CL = 95% Confidence Limits
Methods: AR = Aqua Regia, 4-Acid = 4-Acid Digestion, LBF = Lithium Borate Fusion, FA/AAS = Fire Assay with Atomic Absorption, LECO = LECO Combustion Analysis
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