OREAS 161b
SKU: 161b
OREAS 161b is a low grade copper ore certified reference material (CRM)
prepared and certified by Ore Research & Exploration Pth Ltd. The material
was sourced from Xstrata’s Mt Isa copper ore deposits located near the township
of Mt Isa in north-west Queensland. The ore deposits are hosted by brecciated
siliceous and dolomitic rock masses within the Urquhart Shale comprising complex
and dissociated veins with chalcopyrite, pyrite and pyrrhotite with grades of
3-4% copper.
OREAS 161b has been characterized using the following methods:
Major elements by borate/ oxidising fusion with XRF finish
LOI at 1000 °C using a muffle furnace or thermogravimetric analyser (TGA)
Full ICP-OES and MS elemental suites by peroxide fusion
Full ICP-OES and MS elemental suites by 4-acid (HCl-HNO3-HF-HClO4)
digestion
Full ICP-OES and MS elemental suites by aqua regia digestion
Total C and Total S by infrared combustion furnace
Certified values for applicable analytes are operationally defined for each
method, with results under OREAS ISO 17034 scope of
accreditation.
Specifications
- State: primary
- Matrix: shale/ siliceous dolomite
- Mineralisation: sediment hosted
- CRM Group: Cu ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Cu, Copper (wt.%) | 0.420 | TBD | TBD | TBD | 4-Acid Digestion |
| Co, Cobalt (ppm) | 122 | TBD | TBD | TBD | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.730 | TBD | TBD | TBD | 4-Acid Digestion |
| SiO2, Silicon dioxide (wt.%) | 84.20 | TBD | TBD | TBD | Borate Fusion XRF |
| MgO, Magnesium oxide (wt.%) | 3.72 | TBD | TBD | TBD | Borate Fusion XRF |
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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