OREAS 161
SKU: 161
OREAS 161 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 161 is one of a suite of seven CRMs characterised for Cu, Fe,
S, CaO, MgO, Al2O3, SiO2, Ag, Pb, Zn and Co by both sodium peroxide fusion ICP
and 4-acid ICP methods.
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.%) | 0.400 | 0.013 | 0.391 | 0.409 | Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 4.32 | 0.170 | 4.20 | 4.44 | Peroxide Fusion ICP |
| Co, Cobalt (ppm) | 119 | 3 | 117 | 120 | 4-Acid Digestion |
| Ag, Silver (ppm) | < 5.00 | IND | IND | IND | Peroxide Fusion ICP |
| Al2O3, Aluminium(III) oxide (wt.%) | 2.51 | 0.050 | 2.48 | 2.54 | Peroxide Fusion ICP |
| CaO, Calcium oxide (wt.%) | 0.160 | 0.070 | 0.130 | 0.180 | Peroxide Fusion ICP |
| Co, Cobalt (ppm) | 119 | 11 | 111 | 127 | Peroxide Fusion ICP |
| MgO, Magnesium oxide (wt.%) | 3.59 | 0.170 | 3.47 | 3.72 | Peroxide Fusion ICP |
| Pb, Lead (ppm) | 109 | 21 | 93 | 125 | Peroxide Fusion ICP |
| S, Sulphur (wt.%) | 2.96 | 0.050 | 2.94 | 2.99 | Peroxide Fusion ICP |
| SiO2, Silicon dioxide (wt.%) | 84.20 | 2.600 | 82.20 | 86.30 | Peroxide Fusion ICP |
| Zn, Zinc (ppm) | 19.0 | 4.0 | 6.0 | 32.0 | Peroxide Fusion ICP |
| Ag, Silver (ppm) | 1.10 | 0.110 | 1.02 | 1.17 | 4-Acid Digestion |
| Al2O3, Aluminium(III) oxide (wt.%) | 2.49 | 0.120 | 2.40 | 2.58 | 4-Acid Digestion |
| CaO, Calcium oxide (wt.%) | 0.158 | 0.009 | 0.152 | 0.164 | 4-Acid Digestion |
| Cu, Copper (wt.%) | 0.409 | 0.012 | 0.402 | 0.416 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 4.26 | 0.120 | 4.17 | 4.35 | 4-Acid Digestion |
| MgO, Magnesium oxide (wt.%) | 3.72 | 0.070 | 3.67 | 3.77 | 4-Acid Digestion |
| Pb, Lead (ppm) | 135 | 10 | 128 | 143 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 3.06 | 0.170 | 2.92 | 3.20 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 22.0 | 6.0 | 15.0 | 29.0 | 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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