OREAS 36
SKU: 36
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).
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.%) | 4.19 | 0.058 | 4.11 | 4.26 | 3-Acid Digestion (no HF) |
| Pb, Lead (wt.%) | 0.579 | 0.013 | 0.564 | 0.593 | 3-Acid Digestion (no HF) |
| Ag, Silver (ppm) | 10.2 | 0.63 | 9.7 | 10.7 | 3-Acid Digestion (no HF) |
| As, Arsenic (ppm) | 722 | 32 | 707 | 738 | 3-Acid Digestion (no HF) |
| Cu, Copper (ppm) | 151 | 5 | 147 | 155 | 3-Acid Digestion (no HF) |
| Fe, Iron (wt.%) | 20.68 | 0.370 | 20.24 | 21.12 | 3-Acid Digestion (no HF) |
| Mn, Manganese (wt.%) | 1.08 | 0.030 | 0.98 | 1.18 | 3-Acid Digestion (no HF) |
| Tl, Thallium (ppm) | ~65 | 3-Acid Digestion (no HF) | |||
| S, Sulphur (wt.%) | 18.81 | 0.220 | 18.39 | 19.32 | Infrared Combustion |
| Ag, Silver (ppm) | 9.60 | 8.40 | 10.90 | Peroxide Fusion ICP | |
| As, Arsenic (ppm) | 699 | 54 | 630 | 767 | Peroxide Fusion ICP |
| Cu, Copper (ppm) | 153 | 7 | 150 | 155 | Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 21.06 | 0.850 | 20.35 | 21.77 | Peroxide Fusion ICP |
| Mn, Manganese (wt.%) | 1.27 | 0.030 | 1.24 | 1.30 | Peroxide Fusion ICP |
| Pb, Lead (wt.%) | 0.553 | 0.010 | 0.540 | 0.565 | Peroxide Fusion ICP |
| Tl, Thallium (ppm) | 109 | 3 | 97 | 122 | Peroxide Fusion ICP |
| Zn, Zinc (wt.%) | 4.22 | 0.130 | 4.08 | 4.37 | Peroxide Fusion ICP |
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