OREAS 123
SKU: 123
Reference material OREAS 123 is one of a suite of five uranium CRMs
prepared from material sourced from trenching at Mantra Resources Nyota
Prospect, Tanzania. The Nyota Prospect is a Karoo sandstone-hosted tabular
deposit. Mineralisation is secondary and typically concentrated within medium to
very coarse grained sandstone units interbedded with greywackes, siltstones or
mudstones. The distribution of mineralisation is controlled by primary
sedimentary features, consistent with fluid migrating along permeable coarse
grained units, along bedding planes, up cross bedding and with preferential
deposition occurring around ferruginous concretions and claystone clasts.
Supergene enrichment is interpreted to have contributed to the high grade nature
of the secondary mineralisation observed in the trenches.Eighteen commercial
analytical laboratories participated in the program to characterise the elements
reported in Tables 1 to 6 (please see certificate). The following methods were
employed:
Lithium borate fusion with X-ray fluorescence (9 laboratories – 10
oxides/elements)
Sodium peroxide fusion or lithium borate fusion with ICP-OES and ICP-MS
(10 laboratories – 28 elements)
Four acid digestion with ICP-OES and ICP-MS (16 laboratories – 38
elements)
Thermogravimetry for Loss On Ignition (12 laboratories)
Infra-red combustion furnace for carbon and sulphur (11 laboratories)
Pressed powder pellet XRF for U (2 laboratories)
Specifications
- State: oxide
- Matrix: sandstone/ sediments
- Mineralisation: sedimentary and hydrothermal
- CRM Group: U ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| U, Uranium (ppm) | 853 | 35 | 825 | 881 | Borate / Peroxide Fusion ICP |
| Th, Thorium (ppm) | 5.73 | 0.328 | 5.58 | 5.89 | Borate / Peroxide Fusion ICP |
| Ce, Cerium (ppm) | 46.7 | 2.50 | 44.9 | 48.5 | Borate / Peroxide Fusion ICP |
| Al2O3, Aluminium(III) oxide (wt.%) | 9.07 | 0.140 | 8.96 | 9.17 | Borate Fusion XRF |
| BaO, Barium oxide (ppm) | 1114 | 41 | 1081 | 1146 | Borate Fusion XRF |
| CaO, Calcium oxide (wt.%) | 0.140 | 0.007 | 0.136 | 0.144 | Borate Fusion XRF |
| Fe2O3, Iron(III) oxide (wt.%) | 2.32 | 0.030 | 2.30 | 2.34 | Borate Fusion XRF |
| K2O, Potassium oxide (wt.%) | 3.27 | 0.039 | 3.24 | 3.30 | Borate Fusion XRF |
| MgO, Magnesium oxide (wt.%) | 0.427 | 0.021 | 0.411 | 0.443 | Borate Fusion XRF |
| MnO, Manganese oxide (wt.%) | 0.100 | 0.004 | 0.098 | 0.102 | Borate Fusion XRF |
| P2O5, Phosphorus(V) oxide (wt.%) | 0.052 | 0.004 | 0.049 | 0.055 | Borate Fusion XRF |
| SiO2, Silicon dioxide (wt.%) | 81.79 | 0.343 | 81.58 | 82.00 | Borate Fusion XRF |
| TiO2, Titanium dioxide (wt.%) | 0.442 | 0.016 | 0.430 | 0.454 | Borate Fusion XRF |
| U, Uranium (ppm) | 858 | 30 | 839 | 877 | Borate Fusion XRF |
| Al, Aluminium (wt.%) | 4.60 | 0.191 | 4.45 | 4.75 | Borate / Peroxide Fusion ICP |
| Ba, Barium (ppm) | 1001 | 49 | 957 | 1045 | Borate / Peroxide Fusion ICP |
| Ca, Calcium (wt.%) | 0.099 | 0.003 | 0.096 | 0.102 | Borate / Peroxide Fusion ICP |
| Cr, Chromium (ppm) | 54 | 8 | 46 | 61 | Borate / Peroxide Fusion ICP |
| Cs, Caesium (ppm) | 0.75 | 0.071 | 0.68 | 0.82 | Borate / Peroxide Fusion ICP |
| Dy, Dysprosium (ppm) | 2.57 | 0.157 | 2.46 | 2.68 | Borate / Peroxide Fusion ICP |
| Er, Erbium (ppm) | 1.45 | 0.097 | 1.38 | 1.51 | Borate / Peroxide Fusion ICP |
| Eu, Europium (ppm) | 1.09 | 0.100 | 1.01 | 1.17 | Borate / Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 1.61 | 0.033 | 1.59 | 1.63 | Borate / Peroxide Fusion ICP |
| Ga, Gallium (ppm) | 10.6 | 0.55 | 10.2 | 11.1 | Borate / Peroxide Fusion ICP |
| Gd, Gadolinium (ppm) | 3.13 | 0.44 | 2.94 | 3.32 | Borate / Peroxide Fusion ICP |
| Hf, Hafnium (ppm) | 6.00 | 0.581 | 5.55 | 6.45 | Borate / Peroxide Fusion ICP |
| Ho, Holmium (ppm) | 0.51 | 0.05 | 0.49 | 0.53 | Borate / Peroxide Fusion ICP |
| K, Potassium (wt.%) | 2.68 | 0.075 | 2.62 | 2.74 | Borate / Peroxide Fusion ICP |
| La, Lanthanum (ppm) | 21.2 | 1.33 | 20.2 | 22.2 | Borate / Peroxide Fusion ICP |
| Lu, Lutetium (ppm) | 0.24 | 0.04 | 0.21 | 0.27 | Borate / Peroxide Fusion ICP |
| Mg, Magnesium (wt.%) | 0.250 | 0.008 | 0.245 | 0.255 | Borate / Peroxide Fusion ICP |
| Mn, Manganese (wt.%) | 0.075 | 0.004 | 0.071 | 0.078 | Borate / Peroxide Fusion ICP |
| Mo, Molybdenum (ppm) | 6.93 | 1.36 | 5.91 | 7.96 | Borate / Peroxide Fusion ICP |
| Nd, Neodymium (ppm) | 19.5 | 0.88 | 18.7 | 20.3 | Borate / Peroxide Fusion ICP |
| P, Phosphorus (wt.%) | 0.022 | 0.003 | 0.020 | 0.025 | Borate / Peroxide Fusion ICP |
| Pr, Praseodymium (ppm) | 5.15 | 0.345 | 4.85 | 5.45 | Borate / Peroxide Fusion ICP |
| Rb, Rubidium (ppm) | 87 | 2.7 | 84 | 89 | Borate / Peroxide Fusion ICP |
| Sm, Samarium (ppm) | 3.87 | 0.225 | 3.71 | 4.04 | Borate / Peroxide Fusion ICP |
| Sr, Strontium (ppm) | 156 | 4 | 153 | 159 | Borate / Peroxide Fusion ICP |
| Tb, Terbium (ppm) | 0.46 | 0.036 | 0.42 | 0.49 | Borate / Peroxide Fusion ICP |
| Ti, Titanium (wt.%) | 0.253 | 0.009 | 0.247 | 0.259 | Borate / Peroxide Fusion ICP |
| Tm, Thulium (ppm) | 0.21 | 0.010 | 0.20 | 0.22 | Borate / Peroxide Fusion ICP |
| V, Vanadium (ppm) | 24.2 | 1.98 | 22.0 | 26.4 | Borate / Peroxide Fusion ICP |
| Y, Yttrium (ppm) | 13.6 | 0.85 | 13.0 | 14.1 | Borate / Peroxide Fusion ICP |
| Yb, Ytterbium (ppm) | 1.47 | 0.092 | 1.42 | 1.52 | Borate / Peroxide Fusion ICP |
| Al, Aluminium (wt.%) | 4.57 | 0.247 | 4.43 | 4.72 | 4-Acid Digestion |
| As, Arsenic (ppm) | 5.19 | 0.67 | 4.84 | 5.54 | 4-Acid Digestion |
| Ba, Barium (ppm) | 1015 | 54 | 987 | 1042 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 1.74 | 0.135 | 1.66 | 1.82 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.101 | 0.006 | 0.098 | 0.104 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 46.0 | 2.91 | 44.5 | 47.6 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 4.49 | 0.252 | 4.34 | 4.63 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 37.2 | 6.3 | 33.5 | 40.9 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 0.76 | 0.055 | 0.73 | 0.79 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 2.45 | 0.150 | 2.30 | 2.59 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 1.60 | 0.053 | 1.57 | 1.63 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 10.9 | 1.04 | 10.4 | 11.5 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.53 | 0.17 | 1.43 | 1.63 | 4-Acid Digestion |
| In, Indium (ppm) | 0.014 | 0.002 | 0.013 | 0.015 | 4-Acid Digestion |
| K, Potassium (wt.%) | 2.58 | 0.148 | 2.49 | 2.68 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 20.7 | 1.25 | 20.2 | 21.3 | 4-Acid Digestion |
| Li, Lithium (ppm) | 4.66 | 0.451 | 4.46 | 4.86 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.244 | 0.018 | 0.232 | 0.255 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.075 | 0.003 | 0.073 | 0.076 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 7.44 | 0.373 | 7.28 | 7.60 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 0.245 | 0.027 | 0.229 | 0.260 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 7.67 | 0.469 | 7.40 | 7.93 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 9.65 | 0.658 | 9.34 | 9.95 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.022 | 0.002 | 0.021 | 0.023 | 4-Acid Digestion |
| Pb, Lead (ppm) | 18.3 | 0.85 | 18.0 | 18.5 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 88 | 4.3 | 85 | 90 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 0.085 | 0.017 | 0.071 | 0.098 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 2.98 | 0.117 | 2.89 | 3.07 | 4-Acid Digestion |
| Sn, Tin (ppm) | 0.70 | 0.056 | 0.68 | 0.71 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 154 | 6 | 151 | 157 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.55 | 0.06 | 0.52 | 0.58 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.46 | 0.06 | 0.40 | 0.52 | 4-Acid Digestion |
| Th, Thorium (ppm) | 5.56 | 0.472 | 5.34 | 5.78 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.247 | 0.014 | 0.239 | 0.255 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.42 | 0.029 | 0.40 | 0.43 | 4-Acid Digestion |
| U, Uranium (ppm) | 825 | 35 | 806 | 843 | 4-Acid Digestion |
| V, Vanadium (ppm) | 22.5 | 1.47 | 21.6 | 23.3 | 4-Acid Digestion |
| W, Tungsten (ppm) | 0.52 | 0.07 | 0.49 | 0.55 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 11.0 | 0.79 | 10.6 | 11.4 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 1.17 | 0.102 | 1.08 | 1.26 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 13.8 | 1.9 | 12.7 | 14.8 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 47.5 | 5.2 | 44.2 | 50.8 | 4-Acid Digestion |
| C, Carbon (wt.%) | 0.052 | 0.010 | 0.046 | 0.057 | Infrared Combustion |
| LOI1000, Loss on ignition @1000 °C (wt.%) | 2.24 | 0.31 | 2.04 | 2.43 | Thermogravimetry |
Product Specifications
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 46.0 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 2.45 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 20.7 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.46 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 11.0 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 1.17 | - | - | - | 4-Acid Digestion |
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
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