OREAS 991
primary
concentrate
porphyry copper-gold
OREAS 991
SKU: 991
OREAS 991 is a matrix-matched certified reference material (MMCRM)
prepared from copper-gold-silver concentrate samples supplied by Newcrest Mining Limited’s Cadia Valley
Operations near Orange, New South Wales, Australia.
Specifications
- State: primary
- Matrix: concentrate
- Mineralisation: porphyry copper-gold
- CRM Group: Concentrates
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Cu, Copper (wt.%) | 20.66 | 0.053 | 20.59 | 20.73 | Classical Wet Chemistry |
| Au, Gold (ppm) | 47.04 | 0.219 | 46.70 | 47.37 | Pb Fire Assay |
| Ag, Silver (ppm) | 48.1 | 0.90 | 47.2 | 49.1 | 4-Acid Digestion |
Product Specifications
State
primary
Matrix
concentrate
Mineralisation
porphyry copper-gold
Availability
available
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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