OREAS 37
SKU: 37
OREAS 37 is a medium 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).
Specifications
- State: primary
- Matrix: metasediment/sulphide
- Mineralisation: Broken Hill Type
- CRM Group: Zn-Pb-Ag sulphide ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Zn, Zinc (wt.%) | 6.26 | 0.150 | 6.17 | 6.35 | 3-Acid Digestion (no HF) |
| Pb, Lead (wt.%) | 0.615 | 0.017 | 0.599 | 0.631 | 3-Acid Digestion (no HF) |
| Ag, Silver (ppm) | 5.19 | 0.63 | 4.77 | 5.62 | 3-Acid Digestion (no HF) |
| As, Arsenic (ppm) | 449 | 28 | 438 | 461 | 3-Acid Digestion (no HF) |
| Cu, Copper (ppm) | 125 | 5 | 120 | 131 | 3-Acid Digestion (no HF) |
| Fe, Iron (wt.%) | 23.76 | 0.560 | 23.31 | 24.22 | 3-Acid Digestion (no HF) |
| Mn, Manganese (wt.%) | 0.719 | 0.017 | 0.687 | 0.751 | 3-Acid Digestion (no HF) |
| Tl, Thallium (ppm) | 63 | 5.0 | 59 | 66 | 3-Acid Digestion (no HF) |
| Ag, Silver (ppm) | 5.00 | 4.20 | 5.80 | Peroxide Fusion ICP | |
| As, Arsenic (ppm) | 460 | 42 | 424 | 496 | Peroxide Fusion ICP |
| Cu, Copper (ppm) | 129 | 6 | 123 | 135 | Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 23.53 | 0.540 | 22.88 | 24.19 | Peroxide Fusion ICP |
| Mn, Manganese (wt.%) | 0.769 | 0.027 | 0.751 | 0.786 | Peroxide Fusion ICP |
| Pb, Lead (wt.%) | 0.597 | 0.020 | 0.589 | 0.605 | Peroxide Fusion ICP |
| Tl, Thallium (ppm) | 156 | 139 | 174 | Peroxide Fusion ICP | |
| Zn, Zinc (wt.%) | 6.30 | 0.180 | 6.09 | 6.51 | Peroxide Fusion ICP |
| S, Sulphur (wt.%) | 26.79 | 0.710 | 26.14 | 27.45 | Infrared Combustion |
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
Need Assistance?
Contact our technical team for custom orders, bulk pricing, or analytical support.
Contact Us