OREAS 175
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Description
Description
OREAS 175 has been prepared from manganese ores sourced from the Glosam Mine situated within Postmasburg Manganese Field located in the Northern Cape Province of South Africa. The ores are composed mainly of braunite group minerals including braunite (3Mn2O3.MnSiO3), partridgeite (Mn2O3) and bixbyite (Mn,Fe)2O3.
Fifteen laboratories participated in the program employing the following methods:
- Mn ore package for Al2O3, BaO, CaO, Cr2O3, Fe2O3, K2O, MgO, MnO, Na2O, P2O5, S, SiO2, TiO2 & V2O5 by borate fusion with XRF finish;
- Thermogravimetry: Loss on Ignition (LOI) at 1000°C;
- 4-acid digestion for full suite elemental package by ICP-OES and MS finish;
- Specific gravity by gas/liquid pycnometry or volumetric flask.
|
Analyte
|
Certified Value
|
1SD
|
95% Confidence Limits Low
|
95% Confidence Limits High
|
Method
|
|---|---|---|---|---|---|
| Mn, Manganese (wt.%) | 41.04 | 0.394 | 40.79 | 41.29 | Borate Fusion XRF |
| Fe, Iron (wt.%) | 15.51 | 0.163 | 15.42 | 15.59 | Borate Fusion XRF |
| P, Phosphorus (ppm) | 440 | 8 | 436 | 444 | Borate Fusion XRF |
| Al2O3, Aluminium(III) oxide (wt.%) | 6.65 | 0.097 | 6.59 | 6.71 | Borate Fusion XRF |
| BaO, Barium oxide (wt.%) | 1.08 | 0.034 | 1.06 | 1.10 | Borate Fusion XRF |
| CaO, Calcium oxide (wt.%) | 0.335 | 0.012 | 0.329 | 0.342 | Borate Fusion XRF |
| Cu, Copper (ppm) | 115 | 17 | 100 | 130 | Borate Fusion XRF |
| Fe2O3, Iron(III) oxide (wt.%) | 22.17 | 0.233 | 22.05 | 22.30 | Borate Fusion XRF |
| K2O, Potassium oxide (wt.%) | 0.663 | 0.015 | 0.655 | 0.670 | Borate Fusion XRF |
| MgO, Magnesium oxide (wt.%) | 0.353 | 0.014 | 0.346 | 0.360 | Borate Fusion XRF |
| MnO, Manganese oxide (wt.%) | 52.99 | 0.509 | 52.67 | 53.32 | Borate Fusion XRF |
| Na2O, Sodium oxide (wt.%) | 0.322 | 0.020 | 0.308 | 0.335 | Borate Fusion XRF |
| P2O5, Phosphorus(V) oxide (wt.%) | 0.101 | 0.002 | 0.100 | 0.102 | Borate Fusion XRF |
| SiO2, Silicon dioxide (wt.%) | 4.36 | 0.071 | 4.32 | 4.40 | Borate Fusion XRF |
| SO3, Sulphur trioxide (wt.%) | 0.079 | 0.009 | 0.074 | 0.085 | Borate Fusion XRF |
| TiO2, Titanium dioxide (wt.%) | 0.297 | 0.007 | 0.293 | 0.301 | Borate Fusion XRF |
| V2O5, Vanadium(V) oxide (ppm) | 270 | 28 | 244 | 295 | Borate Fusion XRF |
| LOI1000, Loss On Ignition @1000 °C (wt.%) | 6.99 | 0.262 | 6.83 | 7.15 | Thermogravimetry |
| SG, Specific Gravity (Unity) | 4.42 | 0.147 | 4.29 | 4.54 | Gas / Liquid Pycnometry |
| Al, Aluminium (wt.%) | 2.87 | 0.286 | 2.59 | 3.15 | 4-Acid Digestion |
| As, Arsenic (ppm) | 29.6 | 5.8 | 24.2 | 35.1 | 4-Acid Digestion |
| Ba, Barium (wt.%) | 0.960 | 0.039 | 0.933 | 0.987 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 3.47 | 0.302 | 3.25 | 3.68 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.25 | 0.014 | 0.24 | 0.26 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.240 | 0.009 | 0.234 | 0.247 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.25 | 0.03 | 0.23 | 0.28 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 46.0 | 2.83 | 43.5 | 48.5 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 49.8 | 2.21 | 47.6 | 51.9 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 91 | 12 | 81 | 101 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 0.51 | 0.046 | 0.47 | 0.55 | 4-Acid Digestion |
| Cu, Copper (ppm) | 96 | 6.8 | 91 | 102 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 9.23 | 0.685 | 8.31 | 10.15 | 4-Acid Digestion |
| Er, Erbium (ppm) | 5.58 | 0.56 | 4.82 | 6.33 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 15.36 | 0.505 | 14.91 | 15.81 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 19.4 | 4.7 | 14.8 | 23.9 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 9.95 | 0.745 | 8.96 | 10.94 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.66 | 0.138 | 1.58 | 1.74 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 1.95 | 0.190 | 1.73 | 2.16 | 4-Acid Digestion |
| In, Indium (ppm) | 0.072 | 0.011 | 0.068 | 0.076 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.558 | 0.021 | 0.544 | 0.572 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 29.2 | 2.39 | 27.3 | 31.1 | 4-Acid Digestion |
| Li, Lithium (ppm) | 581 | 37 | 555 | 608 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.76 | 0.053 | 0.70 | 0.82 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.196 | 0.018 | 0.183 | 0.209 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 41.19 | 0.728 | 40.58 | 41.81 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 2.57 | 0.28 | 2.31 | 2.82 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 0.248 | 0.016 | 0.234 | 0.262 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 4.00 | 0.69 | 3.34 | 4.67 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 37.3 | 3.26 | 33.6 | 40.9 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 109 | 8 | 102 | 115 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.042 | 0.005 | 0.038 | 0.046 | 4-Acid Digestion |
| Pb, Lead (ppm) | 227 | 33 | 202 | 251 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 8.48 | 0.92 | 7.23 | 9.72 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 6.07 | 0.401 | 5.74 | 6.39 | 4-Acid Digestion |
| Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.099 | 0.018 | 0.075 | 0.122 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 1.65 | 0.18 | 1.43 | 1.87 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 14.4 | 1.01 | 13.3 | 15.5 | 4-Acid Digestion |
| Se, Selenium (ppm) | < 1.00 | IND | IND | IND | 4-Acid Digestion |
| Sm, Samarium (ppm) | 9.33 | 1.78 | 6.91 | 11.76 | 4-Acid Digestion |
| Sn, Tin (ppm) | 1.76 | 0.121 | 1.68 | 1.84 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 431 | 26 | 411 | 452 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.29 | 0.026 | 0.27 | 0.31 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 1.53 | 0.131 | 1.36 | 1.70 | 4-Acid Digestion |
| Th, Thorium (ppm) | 3.10 | 0.108 | 3.04 | 3.16 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.178 | 0.010 | 0.169 | 0.186 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.23 | 0.02 | 0.21 | 0.25 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.75 | 0.09 | 0.62 | 0.87 | 4-Acid Digestion |
| U, Uranium (ppm) | 1.17 | 0.073 | 1.12 | 1.22 | 4-Acid Digestion |
| V, Vanadium (ppm) | 142 | 8 | 136 | 149 | 4-Acid Digestion |
| W, Tungsten (ppm) | 4.28 | 0.260 | 4.06 | 4.50 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 66 | 5.8 | 62 | 70 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 4.79 | 0.414 | 4.24 | 5.34 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 83 | 11 | 74 | 91 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 53 | 2.9 | 51 | 55 | 4-Acid Digestion |
