OREAS 262b
oxide
mudstone
Carlin style
OREAS 262b
SKU: 262b
OREAS 262b was prepared from a blend of gold-bearing oxide ores (from
Australia and Laos) and barren mudstone sourced from a quarry east of Melbourne,
Australia. The main ore proportion was sourced from intrusion-related, low-grade
gold-copper oxide ore from the southern Archaean Yilgarn Craton of Western
Australia. The lesser ore proportion consists of gold-copper oxide ore from the
Sepon Mineral District. Gold mineralisation is often localised in structural and
stratigraphic fluid traps similar in style to the sediment-hosted gold deposits
of the Carlin Trend, Nevada, USA. Thirty-three commercial analytical
laboratories participated in the program to certify:
Gold by fire assay;
Gold by 15-50g aqua regia digestion;
Gold by 5-200g cyanide leach;
Gold by PhotonAssay with recommended gross mass 470-500g;
Full ICP-OES and ICP-MS elemental suites by 4-acid digestion;
Full ICP-OES and ICP-MS elemental suites by aqua regia
digestion.
Specifications
- State: oxide
- Matrix: mudstone
- Mineralisation: Carlin style
- CRM Group: Au, Au only
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppb) | 104 | 6.0 | 101 | 107 | Pb Fire Assay |
| Au, Gold (ppb) | 93.5 | 13.55 | 86.8 | 100.3 | Aqua Regia Digestion (sample weights 10-50g) |
| Au, Gold (ppb) | 82.1 | 14.53 | 74.6 | 89.6 | Cyanide Leach |
| Au, Gold (ppb) | 108 | 23.4 | 102 | 114 | PhotonAssay |
| Ag, Silver (ppm) | 0.158 | 0.019 | 0.125 | 0.190 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 5.01 | 0.214 | 4.85 | 5.17 | 4-Acid Digestion |
| As, Arsenic (ppm) | 30.3 | 2.95 | 28.0 | 32.5 | 4-Acid Digestion |
| Ba, Barium (ppm) | 336 | 11 | 325 | 347 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 1.52 | 0.033 | 1.46 | 1.57 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.73 | 0.051 | 0.68 | 0.79 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.384 | 0.014 | 0.369 | 0.398 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.062 | 0.017 | 0.043 | 0.080 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 68 | 2.6 | 65 | 71 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 5.74 | 0.349 | 5.41 | 6.06 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 49.7 | 5.0 | 46.3 | 53.0 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 5.02 | 0.169 | 4.79 | 5.25 | 4-Acid Digestion |
| Cu, Copper (ppm) | 70 | 3.5 | 67 | 73 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 2.37 | 0.39 | 1.94 | 2.80 | 4-Acid Digestion |
| Er, Erbium (ppm) | 1.31 | 0.128 | 1.14 | 1.47 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.74 | 0.028 | 0.68 | 0.79 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 2.46 | 0.049 | 2.39 | 2.53 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 12.6 | 0.72 | 11.9 | 13.3 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.35 | 0.255 | 2.92 | 3.79 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 2.54 | 0.238 | 2.32 | 2.75 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.43 | 0.05 | 0.37 | 0.49 | 4-Acid Digestion |
| In, Indium (ppm) | 0.063 | 0.006 | 0.056 | 0.071 | 4-Acid Digestion |
| K, Potassium (wt.%) | 1.63 | 0.082 | 1.57 | 1.70 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 34.6 | 1.22 | 32.8 | 36.3 | 4-Acid Digestion |
| Li, Lithium (ppm) | 34.9 | 1.27 | 33.6 | 36.1 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.19 | 0.02 | 0.15 | 0.23 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.557 | 0.014 | 0.537 | 0.576 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.019 | 0.001 | 0.018 | 0.019 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 1.48 | 0.121 | 1.28 | 1.68 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 0.190 | 0.011 | 0.181 | 0.198 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 7.70 | 1.30 | 6.86 | 8.54 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 24.0 | 4.4 | 18.9 | 29.0 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 22.0 | 1.66 | 20.4 | 23.7 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.024 | 0.001 | 0.022 | 0.025 | 4-Acid Digestion |
| Pb, Lead (ppm) | 19.4 | 0.73 | 18.5 | 20.2 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 6.97 | 0.72 | 6.13 | 7.81 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 110 | 6 | 105 | 116 | 4-Acid Digestion |
| Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.036 | 0.006 | 0.033 | 0.040 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 5.41 | 0.334 | 5.09 | 5.73 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 7.02 | 0.447 | 6.59 | 7.44 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 4.35 | 0.348 | 3.88 | 4.82 | 4-Acid Digestion |
| Sn, Tin (ppm) | 6.72 | 0.292 | 6.40 | 7.05 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 44.1 | 1.67 | 41.9 | 46.3 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.78 | 0.12 | 0.68 | 0.88 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.45 | 0.037 | 0.39 | 0.51 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.11 | 0.02 | 0.08 | 0.14 | 4-Acid Digestion |
| Th, Thorium (ppm) | 12.6 | 0.64 | 11.9 | 13.3 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.253 | 0.019 | 0.238 | 0.267 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.88 | 0.047 | 0.83 | 0.93 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.18 | 0.017 | 0.16 | 0.20 | 4-Acid Digestion |
| U, Uranium (ppm) | 1.95 | 0.097 | 1.83 | 2.07 | 4-Acid Digestion |
| V, Vanadium (ppm) | 51 | 2.7 | 49 | 54 | 4-Acid Digestion |
| W, Tungsten (ppm) | 3.07 | 0.284 | 2.80 | 3.34 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 12.0 | 0.95 | 11.1 | 12.9 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 1.30 | 0.19 | 1.11 | 1.48 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 47.2 | 2.28 | 45.1 | 49.2 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 89 | 7.0 | 83 | 95 | 4-Acid Digestion |
| Ag, Silver (ppm) | 0.132 | 0.008 | 0.118 | 0.147 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 0.922 | 0.170 | 0.821 | 1.024 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 13.9 | 0.76 | 13.0 | 14.8 | Aqua Regia Digestion |
| B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
| Ba, Barium (ppm) | 75 | 4.1 | 69 | 80 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.47 | 0.05 | 0.43 | 0.51 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 0.69 | 0.043 | 0.64 | 0.73 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 0.266 | 0.011 | 0.256 | 0.276 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.063 | 0.010 | 0.049 | 0.077 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 31.3 | 2.04 | 29.4 | 33.2 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 4.02 | 0.43 | 3.71 | 4.34 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 31.8 | 1.43 | 29.9 | 33.7 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 1.65 | 0.27 | 1.47 | 1.83 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 66 | 2.4 | 64 | 69 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 2.07 | 0.122 | 1.99 | 2.14 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 2.93 | 0.53 | 2.53 | 3.33 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.33 | 0.031 | 0.29 | 0.37 | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 0.056 | 0.013 | 0.043 | 0.069 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.019 | 0.002 | 0.016 | 0.023 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.216 | 0.028 | 0.199 | 0.234 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 14.5 | 1.13 | 13.7 | 15.3 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 11.3 | 1.7 | 10.2 | 12.4 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 0.287 | 0.047 | 0.260 | 0.313 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.014 | 0.001 | 0.014 | 0.015 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 1.39 | 0.15 | 1.24 | 1.53 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 16.0 | 1.15 | 14.7 | 17.3 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.019 | 0.001 | 0.018 | 0.020 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 16.6 | 0.95 | 15.8 | 17.5 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 17.0 | 1.07 | 15.9 | 18.0 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | < 0.001 | IND | IND | IND | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.031 | 0.001 | 0.030 | 0.032 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 3.55 | 0.48 | 3.24 | 3.86 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 1.55 | 0.113 | 1.40 | 1.70 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 1.66 | 0.22 | 1.50 | 1.83 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 12.0 | 0.72 | 11.3 | 12.8 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.26 | 0.03 | 0.22 | 0.30 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 0.090 | 0.017 | 0.068 | 0.111 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 8.89 | 0.583 | 8.34 | 9.44 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.017 | 0.003 | 0.015 | 0.019 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.28 | 0.022 | 0.26 | 0.30 | Aqua Regia Digestion |
| U, Uranium (ppm) | 1.13 | 0.087 | 1.06 | 1.19 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 19.3 | 1.04 | 18.3 | 20.3 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 0.64 | 0.12 | 0.53 | 0.76 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 5.06 | 0.416 | 4.75 | 5.37 | Aqua Regia Digestion |
| Yb, Ytterbium (ppm) | 0.44 | 0.05 | 0.34 | 0.53 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 28.5 | 3.5 | 26.4 | 30.6 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 13.4 | 2.0 | 11.9 | 14.9 | Aqua Regia Digestion |
Product Specifications
State
oxide
Matrix
mudstone
Mineralisation
Carlin style
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 68 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 2.37 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 1.31 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 0.74 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 3.35 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.43 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 34.6 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.19 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 24.0 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 6.97 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 4.35 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.45 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.18 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 12.0 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 1.30 | - | - | - | 4-Acid Digestion |
| Ag - Silver (ppm) | 0.132 | - | - | - | Aqua Regia |
| As - Arsenic (ppm) | 13.9 | - | - | - | Aqua Regia |
| Bi - Bismuth (ppm) | 0.69 | - | - | - | Aqua Regia |
| Cd - Cadmium (ppm) | 0.063 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 4.02 | - | - | - | Aqua Regia |
| Cu - Copper (ppm) | 66 | - | - | - | Aqua Regia |
| Hg - Mercury (ppm) | 0.056 | - | - | - | Aqua Regia |
| Mo - Molybdenum (ppm) | 1.39 | - | - | - | Aqua Regia |
| Sb - Antimony (ppm) | 3.55 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 1.66 | - | - | - | Aqua Regia |
| Tl - Thallium (ppm) | 0.28 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 28.5 | - | - | - | Aqua Regia |
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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