| Description: OREAS 36 is a low 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). Download Certificate OREAS36 Download DataPack OREAS36 | Analyte | Certified Value | 1SD | 95% CI Low | 95% CI High | Method |
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| Ag, Silver (ppm) | 10.2 | 0.63 | 9.7 | 10.7 | 3-Acid Digestion (no HF) | | As, Arsenic (ppm) | 722 | 32 | 686 | 758 | 3-Acid Digestion (no HF) | | Cu, Copper (ppm) | 151 | 5 | 143 | 158 | 3-Acid Digestion (no HF) | | Fe, Iron (wt.%) | 20.68 | 0.37 | 19.65 | 21.72 | 3-Acid Digestion (no HF) | | Mn, Manganese (wt.%) | 1.08 | 0.03 | 1.03 | 1.13 | 3-Acid Digestion (no HF) | | Pb, Lead (wt.%) | 0.579 | 0.013 | 0.55 | 0.608 | 3-Acid Digestion (no HF) | | Tl, Thallium (ppm) | 65 | | | | 3-Acid Digestion (no HF) | | Zn, Zinc (wt.%) | 4.19 | 0.058 | 4.11 | 4.26 | 3-Acid Digestion (no HF) | | S, Sulphur (wt.%) | 18.81 | 0.22 | 17.87 | 19.75 | Infrared Combustion | | Ag, Silver (ppm) | 9.6 | | 8.4 | 10.9 | Peroxide Fusion ICP | | As, Arsenic (ppm) | 699 | 54 | 669 | 733 | Peroxide Fusion ICP | | Cu, Copper (ppm) | 153 | 7 | 145 | 160 | Peroxide Fusion ICP | | Fe, Iron (wt.%) | 21.06 | 0.85 | 20.01 | 22.11 | Peroxide Fusion ICP | | Mn, Manganese (wt.%) | 1.27 | 0.03 | 1.21 | 1.34 | Peroxide Fusion ICP | | Pb, Lead (wt.%) | 0.553 | 0.01 | 0.525 | 0.58 | Peroxide Fusion ICP | | Tl, Thallium (ppm) | 109 | 3 | 104 | 115 | Peroxide Fusion ICP | | Zn, Zinc (wt.%) | 4.22 | 0.13 | 4.01 | 4.43 | Peroxide Fusion ICP |
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