Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 554b was prepared from a blend of copper-cobalt primary ore materials supplied by Metorex (subsidiary of Jinchuan Group) from the Dilala Est Copper Cobalt Project, located within the Kolwezi Klippe area of Lualaba Province (Democratic Republic of the Congo). Kolwezi is ~320 kilometres northwest from Lubumbashi, the provincial capital of Haut Katanga Province. Copper-cobalt ores within the Kolwezi Klippe area are stratiform, sediment-hosted deposits hosted within Neoproterozoic sedimentary rocks of the Central African Copperbelt. Primary mineralisation typically consists of bornite, chalcopyrite and cobalt sulphides (linnaeite and carrollite) hosted within dolomitic argillite, shales, sandstone and dolomite horizons.
Thirty analytical laboratories participated in the program using the following methods:
• Lithium borate fusion whole rock analysis package by X-ray
fluorescence;
• Thermogravimetry: Loss on Ignition (LOI) at
1000°C;
• C and S by infrared combustion furnace/CS
analyser;
• Cu and Co by *5% sulphuric acid leach with ICP or AAS
finish;
• Cu and Co by *10% sulphuric acid leach with ICP or AAS
finish;
• Sodium peroxide fusion with full suite elemental package by
ICP-OES and/or MS finish;
• 4-acid digestion for full suite elemental
package by ICP-OES and MS finish;
• Aqua regia digestion for full
elemental suite package by ICP-OES and ICP-MS finish.
Analyte | Indicative Value | 1SD | Expanded Uncertainty Low | Expanded Uncertainty High | Method |
---|---|---|---|---|---|
Cu, Copper (wt.%) | 3.81 | TBD | TBD | TBD | Borate / Peroxide Fusion ICP |
Co, Cobalt (wt.%) | 0.810 | TBD | TBD | TBD | Borate / Peroxide Fusion ICP |
S, Sulphur (wt.%) | 3.71 | TBD | TBD | TBD | Infrared Combustion |