OREAS 64
SKU: 64
OREAS 64 is a gold–silver certified reference material produced from Cerro
Moro low Ag–Au ore, blended with Cerro Moro high-Au ore and a silver
concentrate.
The material replicates low-sulphidation epithermal vein mineralisation
hosted in volcanic rocks, making it well-suited for calibration and QA/QC of
Au–Ag assays (fire assay/ICP) and multi-element geochemical suites used in
exploration and mill QA/QC.
OREAS 64 has been characterized using the following methods:
Gold via 25-50g fire assay with gravimetric finish
Silver via 25-50g fire assay with Gravimetric finish
Silver via 4-Acid digestion with 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: andesitic volcanics
- Mineralisation: low sulphidation epithermal
- CRM Group: Au >1 ppm, Au-Ag ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Ag, Silver (ppm) | 685 | TBD | TBD | TBD | 4-Acid Digestion |
| Au, Gold (ppm) | 16.85 | TBD | TBD | TBD | Pb Fire Assay |
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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