OREAS 905b
oxide
weathered rhyodacite
oxidised VMS
OREAS 905b
SKU: 905b
OREAS 905b was prepared from a blend of copper and gold oxide ores and barren
weathered rhyodacite. The copper ore was sourced from a copper-rich zone within
MMG’s VMS Gossan Hill deposit at Golden Grove (Western Australia, AU). The gold
ores were sourced from the Stawell Gold Mine (Victoria, AU) and Agate Creek Mine
(Queensland, AU). The rhyodacite was sourced from a quarry approximately 30km
east of Melbourne, Australia.
Twenty-eight commercial analytical laboratories participated in the program
using the following methods:
Gold by fire assay with AAS, ICP-OES or ICP-MS finish
Gold by aqua regia digestion (15-30g sample weight) with AAS, ICP-OES or
ICP-MS finish
Full ICP-OES and ICP-MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl)
digestion
Full ICP-OES and ICP-MS elemental suites by aqua regia digestion
Copper by Sequential leach: acid leach, alkaline leach, residual leach and
calculated total
Instrumental neutron activation analysis for Au on 20 x 85mg subsamples was
also undertaken at ANSTO, Lucas Heights to confirm
homogeneity.
Specifications
- State: oxide
- Matrix: weathered rhyodacite
- Mineralisation: oxidised VMS
- CRM Group: Cu ore, Au, Au-Cu ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Cu, Copper (wt.%) | 0.144 | 0.003 | 0.140 | 0.148 | 4-Acid Digestion |
| Cu-Sol(H2SO4), Copper soluble (sulphuric) (wt.%) | 0.121 | 0.004 | 0.118 | 0.124 | Sequential Leach |
| Au, Gold (ppm) | 0.381 | 0.011 | 0.376 | 0.385 | Pb Fire Assay |
| Au, Gold (ppm) | 0.380 | 0.019 | 0.372 | 0.389 | Aqua Regia Digestion (sample weights 10-50g) |
| Ag, Silver (ppm) | 0.600 | 0.062 | 0.544 | 0.656 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 7.50 | 0.259 | 7.27 | 7.73 | 4-Acid Digestion |
| As, Arsenic (ppm) | 32.4 | 1.56 | 30.9 | 34.0 | 4-Acid Digestion |
| Ba, Barium (ppm) | 2711 | 137 | 2614 | 2807 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 3.00 | 0.238 | 2.81 | 3.18 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 4.46 | 0.270 | 4.22 | 4.69 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 1.16 | 0.064 | 1.11 | 1.21 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.46 | 0.05 | 0.41 | 0.50 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 97 | 5.0 | 91 | 102 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 10.6 | 0.63 | 10.0 | 11.2 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 17.2 | 2.5 | 15.3 | 19.2 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 6.14 | 0.220 | 5.89 | 6.38 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 3.84 | 0.243 | 3.55 | 4.12 | 4-Acid Digestion |
| Er, Erbium (ppm) | 1.12 | 0.075 | 1.00 | 1.24 | 4-Acid Digestion |
| Eu, Europium (ppm) | 1.62 | 0.24 | 1.39 | 1.85 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 3.68 | 0.133 | 3.58 | 3.78 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 25.3 | 1.46 | 24.0 | 26.7 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 6.16 | 0.269 | 5.72 | 6.60 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 6.51 | 0.426 | 6.15 | 6.86 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.55 | 0.026 | 0.51 | 0.60 | 4-Acid Digestion |
| In, Indium (ppm) | 0.57 | 0.025 | 0.54 | 0.60 | 4-Acid Digestion |
| K, Potassium (wt.%) | 2.97 | 0.114 | 2.89 | 3.05 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 47.6 | 2.19 | 45.0 | 50.1 | 4-Acid Digestion |
| Li, Lithium (ppm) | 30.9 | 1.57 | 29.6 | 32.2 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.093 | 0.009 | 0.082 | 0.105 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.311 | 0.013 | 0.301 | 0.322 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.035 | 0.001 | 0.033 | 0.036 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 5.08 | 0.290 | 4.75 | 5.40 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 2.58 | 0.101 | 2.50 | 2.66 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 20.8 | 1.38 | 19.6 | 22.0 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 40.7 | 1.42 | 38.3 | 43.1 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 11.0 | 0.52 | 10.4 | 11.7 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.037 | 0.002 | 0.035 | 0.039 | 4-Acid Digestion |
| Pb, Lead (ppm) | 27.7 | 1.22 | 26.4 | 29.0 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 11.1 | 0.53 | 10.3 | 12.0 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 142 | 7 | 135 | 149 | 4-Acid Digestion |
| Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.027 | 0.004 | 0.025 | 0.029 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 1.73 | 0.106 | 1.63 | 1.84 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 5.11 | 0.296 | 4.82 | 5.40 | 4-Acid Digestion |
| Se, Selenium (ppm) | 2.28 | 0.44 | 1.61 | 2.95 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 7.70 | 0.318 | 7.26 | 8.15 | 4-Acid Digestion |
| Sn, Tin (ppm) | 4.01 | 0.237 | 3.77 | 4.25 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 188 | 10 | 180 | 195 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 1.52 | 0.125 | 1.41 | 1.62 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.83 | 0.042 | 0.76 | 0.91 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.097 | 0.016 | 0.071 | 0.122 | 4-Acid Digestion |
| Th, Thorium (ppm) | 15.0 | 0.89 | 14.2 | 15.8 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.161 | 0.006 | 0.155 | 0.167 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.78 | 0.036 | 0.73 | 0.83 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.13 | 0.008 | 0.11 | 0.14 | 4-Acid Digestion |
| U, Uranium (ppm) | 5.47 | 0.308 | 5.20 | 5.75 | 4-Acid Digestion |
| V, Vanadium (ppm) | 10.7 | 0.98 | 9.9 | 11.5 | 4-Acid Digestion |
| W, Tungsten (ppm) | 1.93 | 0.106 | 1.79 | 2.08 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 15.8 | 0.75 | 15.1 | 16.4 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 0.68 | 0.047 | 0.60 | 0.76 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 130 | 7 | 124 | 135 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 241 | 9 | 231 | 251 | 4-Acid Digestion |
| Ag, Silver (ppm) | 0.568 | 0.028 | 0.537 | 0.600 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 0.896 | 0.038 | 0.862 | 0.929 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 29.5 | 1.58 | 28.3 | 30.8 | Aqua Regia Digestion |
| B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
| Ba, Barium (ppm) | 164 | 13 | 155 | 173 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.75 | 0.061 | 0.69 | 0.81 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 4.41 | 0.202 | 4.21 | 4.60 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 0.883 | 0.030 | 0.859 | 0.907 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.43 | 0.026 | 0.39 | 0.47 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 78 | 3.3 | 75 | 81 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 9.54 | 0.477 | 9.02 | 10.06 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 13.6 | 1.00 | 12.7 | 14.5 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 1.44 | 0.141 | 1.34 | 1.55 | Aqua Regia Digestion |
| Cu, Copper (wt.%) | 0.145 | 0.004 | 0.141 | 0.148 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 3.04 | 0.142 | 2.96 | 3.13 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 6.43 | 0.639 | 6.01 | 6.85 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.12 | 0.02 | 0.09 | 0.14 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 1.26 | 0.114 | 1.18 | 1.35 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.49 | 0.022 | 0.47 | 0.51 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.302 | 0.022 | 0.286 | 0.317 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 38.7 | 1.90 | 37.0 | 40.3 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 13.9 | 0.91 | 13.3 | 14.6 | Aqua Regia Digestion |
| Lu, Lutetium (ppm) | 0.040 | 0.003 | 0.033 | 0.047 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 0.194 | 0.013 | 0.183 | 0.204 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.031 | 0.001 | 0.030 | 0.032 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 4.61 | 0.321 | 4.35 | 4.87 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.106 | 0.008 | 0.099 | 0.114 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.44 | 0.10 | 0.34 | 0.53 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 9.80 | 0.395 | 9.36 | 10.24 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.029 | 0.002 | 0.027 | 0.030 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 13.9 | 0.84 | 13.4 | 14.5 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 18.6 | 1.17 | 17.4 | 19.8 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.025 | 0.004 | 0.021 | 0.029 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 0.87 | 0.09 | 0.80 | 0.93 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 1.80 | 0.140 | 1.67 | 1.92 | Aqua Regia Digestion |
| Se, Selenium (ppm) | 2.07 | 0.193 | 1.79 | 2.34 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 0.96 | 0.13 | 0.86 | 1.07 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 30.3 | 1.38 | 29.2 | 31.5 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.56 | 0.037 | 0.51 | 0.60 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 0.079 | 0.014 | 0.063 | 0.095 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 10.2 | 0.63 | 9.7 | 10.8 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.030 | 0.002 | 0.029 | 0.032 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.12 | 0.02 | 0.10 | 0.13 | Aqua Regia Digestion |
| U, Uranium (ppm) | 2.92 | 0.174 | 2.78 | 3.07 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 6.25 | 0.483 | 5.72 | 6.78 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 0.36 | 0.04 | 0.33 | 0.40 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 8.87 | 0.410 | 8.52 | 9.22 | Aqua Regia Digestion |
| Yb, Ytterbium (ppm) | 0.34 | 0.06 | 0.28 | 0.39 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 91 | 2.1 | 88 | 94 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 46.8 | 3.70 | 43.9 | 49.8 | Aqua Regia Digestion |
| Cu-Res(4A), Copper residual (post leach) (wt.%) | 0.017 | 0.002 | 0.016 | 0.019 | Sequential Leach |
| Cu-Sol(CN), Copper soluble (cyanidation) (wt.%) | 0.008 | 0.002 | 0.007 | 0.009 | Sequential Leach |
| Cu-Tot(Calc), Copper total (calculated) (wt.%) | 0.147 | 0.004 | 0.143 | 0.150 | Sequential Leach |
Product Specifications
State
oxide
Matrix
weathered rhyodacite
Mineralisation
oxidised VMS
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 97 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 3.84 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 1.12 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 1.62 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 6.16 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.55 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 47.6 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.093 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 40.7 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 11.1 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 7.70 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.83 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.13 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 15.8 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 0.68 | - | - | - | 4-Acid Digestion |
| Ag - Silver (ppm) | 0.568 | - | - | - | Aqua Regia |
| As - Arsenic (ppm) | 29.5 | - | - | - | Aqua Regia |
| Bi - Bismuth (ppm) | 4.41 | - | - | - | Aqua Regia |
| Cd - Cadmium (ppm) | 0.43 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 9.54 | - | - | - | Aqua Regia |
| Mo - Molybdenum (ppm) | 4.61 | - | - | - | Aqua Regia |
| Pb - Lead (ppm) | 13.9 | - | - | - | Aqua Regia |
| Sb - Antimony (ppm) | 0.87 | - | - | - | Aqua Regia |
| Se - Selenium (ppm) | 2.07 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 0.96 | - | - | - | Aqua Regia |
| Tl - Thallium (ppm) | 0.12 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 91 | - | - | - | 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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