Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 38 is a high grade zinc ore matrix-matched certified reference material (MMCRM) prepared by Ore Research and Exploration. It is one of 3 MMCRM’s sourced from the Gamsberg Zn deposit located in the Northern Cape Province of South Africa, approximately 20km west of the Black Mountain mine. Gamsberg is a stratiform base metal Broken Hill Style (BHS) deposit located in the mid-proterozoic Bushmanland Province of the Namaqualand Metamorphic Complex (NMC) of South Africa. The NMC is a highly deformed and metamorphosed supracrustal succession of dominantly pelitic schists and quartzites, deposited on a regionally extensive �2000 Ma basement (Rozendal & Stalder, 2001). The stratiform ores have a close spatial and genetic association with metamorphosed chemical sediments including manganiferous iron formations, quartz-garnet rocks (coticules), Ca-Mn marbles and barite (Rozendal & Stalder, 2001).
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
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Zn, Zinc (wt.%) | 10.04 | 0.140 | 9.89 | 10.19 | 3-Acid Digestion (no HF) |
Pb, Lead (wt.%) | 0.592 | 0.018 | 0.578 | 0.605 | 3-Acid Digestion (no HF) |
Ag, Silver (ppm) | 5.49 | 0.420 | 5.23 | 5.75 | 3-Acid Digestion (no HF) |
As, Arsenic (ppm) | 298 | 17 | 289 | 307 | 3-Acid Digestion (no HF) |
Cu, Copper (ppm) | 111 | 5 | 107 | 116 | 3-Acid Digestion (no HF) |
Fe, Iron (wt.%) | 21.28 | 0.420 | 20.97 | 21.59 | 3-Acid Digestion (no HF) |
Mn, Manganese (wt.%) | 1.37 | 0.040 | 1.27 | 1.46 | 3-Acid Digestion (no HF) |
Tl, Thallium (ppm) | 64 | 5.5 | 48 | 79 | 3-Acid Digestion (no HF) |
Ag, Silver (ppm) | ~5.00 | Peroxide Fusion ICP | |||
As, Arsenic (ppm) | 300 | 26 | 258 | 342 | Peroxide Fusion ICP |
Cu, Copper (ppm) | 108 | 9 | 99 | 118 | Peroxide Fusion ICP |
Fe, Iron (wt.%) | 20.98 | 0.840 | 20.31 | 21.66 | Peroxide Fusion ICP |
Mn, Manganese (wt.%) | 1.57 | 0.040 | 1.51 | 1.62 | Peroxide Fusion ICP |
Pb, Lead (wt.%) | 0.560 | 0.010 | 0.548 | 0.573 | Peroxide Fusion ICP |
Tl, Thallium (ppm) | 124 | 5 | 101 | 146 | Peroxide Fusion ICP |
Zn, Zinc (wt.%) | 9.99 | 0.200 | 9.85 | 10.12 | Peroxide Fusion ICP |
S, Sulphur (wt.%) | 22.32 | 0.340 | 21.85 | 22.80 | Infrared Combustion |