OREAS 628
primary
rhyodacite
volcanic hosted massive sulphide
OREAS 628
SKU: 628
OREAS 628 was prepared from a blend of polymetallic (Au-Zn-Cu-Pb-Ag) ore,
barren rhyodacite and a minor addition of Cu concentrate. The ore was sourced
from the Rosebery mine located in the north-west region of Tasmania, Australia,
approximately 300 kilometres north-west of Hobart and 125 kilometres south of
Burnie. The key minerals of economic importance include sphalerite, galena,
pyrite, chalcopyrite and electrum. The barren rhyodacite was sourced from the
rhyodacitic unit of the Mt Dandenong Igneous Complex located approximately 34km
east of Melbourne (Victoria), Australia.
Thirty-one commercial analytical laboratories participated in the program to
certify the elements reported below. The following methods were employed:
Gold by fire assay (25-50g charge weight) with AAS or ICP-OES finish;
Gold by aqua regia digestion (10-50g sample weight) with AAS 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;
Full ICP-OES and ICP-MS elemental suites by peroxide fusion and
Total Sulphur by infrared combustion furnace.
Instrumental neutron activation analysis for Au on 20 x 85mg subsamples was
also undertaken at ANSTO, Lucas Heights to confirm homogeneity (see Table 5 of
Certificate).
Specifications
- State: primary
- Matrix: rhyodacite
- Mineralisation: volcanic hosted massive sulphide
- CRM Group: Zn-Pb-Ag sulphide ore, Au, Au-Cu ore, Au-Ag ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Zn, Zinc (wt.%) | 1.04 | 0.034 | 1.01 | 1.07 | 4-Acid Digestion |
| Cu, Copper (wt.%) | 1.74 | 0.041 | 1.71 | 1.78 | 4-Acid Digestion |
| Au, Gold (ppm) | 0.868 | 0.025 | 0.859 | 0.877 | Pb Fire Assay |
| Au, Gold (ppm) | 0.860 | 0.032 | 0.844 | 0.877 | Aqua Regia Digestion (sample weights 10-50g) |
| S, Sulphur (wt.%) | 3.64 | 0.117 | 3.56 | 3.72 | Infrared Combustion |
| Al, Aluminium (wt.%) | 6.86 | 0.185 | 6.66 | 7.07 | Peroxide Fusion ICP |
| As, Arsenic (ppm) | 204 | 35 | 167 | 241 | Peroxide Fusion ICP |
| Ba, Barium (ppm) | 2610 | 162 | 2480 | 2741 | Peroxide Fusion ICP |
| Bi, Bismuth (ppm) | 13.0 | 0.66 | 12.0 | 14.1 | Peroxide Fusion ICP |
| Ca, Calcium (wt.%) | 0.942 | 0.052 | 0.886 | 0.997 | Peroxide Fusion ICP |
| Cd, Cadmium (ppm) | 29.1 | 0.94 | 27.4 | 30.8 | Peroxide Fusion ICP |
| Ce, Cerium (ppm) | 78 | 4.7 | 72 | 84 | Peroxide Fusion ICP |
| Co, Cobalt (ppm) | 31.2 | 4.1 | 27.5 | 35.0 | Peroxide Fusion ICP |
| Cs, Caesium (ppm) | 6.79 | 0.547 | 5.96 | 7.62 | Peroxide Fusion ICP |
| Cu, Copper (wt.%) | 1.74 | 0.047 | 1.69 | 1.78 | Peroxide Fusion ICP |
| Dy, Dysprosium (ppm) | 3.32 | 0.291 | 2.99 | 3.66 | Peroxide Fusion ICP |
| Er, Erbium (ppm) | 1.19 | 0.076 | 1.04 | 1.33 | Peroxide Fusion ICP |
| Eu, Europium (ppm) | 1.42 | 0.16 | 1.21 | 1.63 | Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 4.91 | 0.219 | 4.75 | 5.06 | Peroxide Fusion ICP |
| Ga, Gallium (ppm) | 21.0 | 0.92 | 19.8 | 22.2 | Peroxide Fusion ICP |
| Gd, Gadolinium (ppm) | 5.70 | 0.312 | 5.16 | 6.23 | Peroxide Fusion ICP |
| Ge, Germanium (ppm) | 1.52 | 0.43 | 0.61 | 2.43 | Peroxide Fusion ICP |
| Ho, Holmium (ppm) | 0.51 | 0.041 | 0.46 | 0.56 | Peroxide Fusion ICP |
| In, Indium (ppm) | 2.68 | 0.184 | 2.44 | 2.93 | Peroxide Fusion ICP |
| K, Potassium (wt.%) | 2.84 | 0.090 | 2.74 | 2.95 | Peroxide Fusion ICP |
| La, Lanthanum (ppm) | 38.5 | 1.85 | 36.1 | 41.0 | Peroxide Fusion ICP |
| Li, Lithium (ppm) | 28.6 | 2.81 | 24.7 | 32.4 | Peroxide Fusion ICP |
| Lu, Lutetium (ppm) | 0.11 | 0.011 | 0.09 | 0.13 | Peroxide Fusion ICP |
| Mg, Magnesium (wt.%) | 0.365 | 0.011 | 0.349 | 0.381 | Peroxide Fusion ICP |
| Mn, Manganese (wt.%) | 0.177 | 0.006 | 0.170 | 0.184 | Peroxide Fusion ICP |
| Mo, Molybdenum (ppm) | 25.3 | 2.53 | 22.9 | 27.7 | Peroxide Fusion ICP |
| Nb, Niobium (ppm) | 14.3 | 1.29 | 12.5 | 16.2 | Peroxide Fusion ICP |
| Nd, Neodymium (ppm) | 36.0 | 1.87 | 33.0 | 39.1 | Peroxide Fusion ICP |
| P, Phosphorus (wt.%) | 0.040 | 0.001 | 0.039 | 0.041 | Peroxide Fusion ICP |
| Pb, Lead (wt.%) | 0.261 | 0.010 | 0.252 | 0.270 | Peroxide Fusion ICP |
| Pr, Praseodymium (ppm) | 9.51 | 0.251 | 9.06 | 9.95 | Peroxide Fusion ICP |
| Rb, Rubidium (ppm) | 144 | 8 | 136 | 152 | Peroxide Fusion ICP |
| S, Sulphur (wt.%) | 3.66 | 0.138 | 3.52 | 3.79 | Peroxide Fusion ICP |
| Sb, Antimony (ppm) | 27.0 | 1.43 | 24.0 | 30.0 | Peroxide Fusion ICP |
| Si, Silicon (wt.%) | 29.47 | 1.009 | 28.32 | 30.63 | Peroxide Fusion ICP |
| Sm, Samarium (ppm) | 6.76 | 0.408 | 6.21 | 7.31 | Peroxide Fusion ICP |
| Sn, Tin (ppm) | 7.71 | 1.80 | 5.49 | 9.92 | Peroxide Fusion ICP |
| Sr, Strontium (ppm) | 158 | 11 | 150 | 166 | Peroxide Fusion ICP |
| Tb, Terbium (ppm) | 0.72 | 0.056 | 0.65 | 0.80 | Peroxide Fusion ICP |
| Th, Thorium (ppm) | 14.0 | 1.03 | 12.8 | 15.1 | Peroxide Fusion ICP |
| Ti, Titanium (wt.%) | 0.148 | 0.007 | 0.140 | 0.156 | Peroxide Fusion ICP |
| Tl, Thallium (ppm) | 4.14 | 0.267 | 3.71 | 4.58 | Peroxide Fusion ICP |
| Tm, Thulium (ppm) | 0.14 | 0.02 | 0.11 | 0.18 | Peroxide Fusion ICP |
| U, Uranium (ppm) | 5.19 | 0.381 | 4.82 | 5.57 | Peroxide Fusion ICP |
| V, Vanadium (ppm) | 18.3 | 2.1 | 15.5 | 21.1 | Peroxide Fusion ICP |
| W, Tungsten (ppm) | 3.25 | 0.52 | 1.87 | 4.62 | Peroxide Fusion ICP |
| Y, Yttrium (ppm) | 15.4 | 0.97 | 14.4 | 16.3 | Peroxide Fusion ICP |
| Yb, Ytterbium (ppm) | 0.87 | 0.085 | 0.70 | 1.04 | Peroxide Fusion ICP |
| Zn, Zinc (wt.%) | 1.05 | 0.044 | 1.02 | 1.08 | Peroxide Fusion ICP |
| Ag, Silver (ppm) | 10.2 | 0.47 | 9.8 | 10.7 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 6.71 | 0.288 | 6.50 | 6.92 | 4-Acid Digestion |
| As, Arsenic (ppm) | 199 | 6 | 191 | 206 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 2.75 | 0.189 | 2.57 | 2.92 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 12.2 | 0.46 | 11.7 | 12.7 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.946 | 0.034 | 0.913 | 0.978 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 28.8 | 1.72 | 27.4 | 30.2 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 73 | 5.9 | 68 | 78 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 31.3 | 1.59 | 30.0 | 32.7 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 20.3 | 1.70 | 18.3 | 22.2 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 6.67 | 0.300 | 6.37 | 6.96 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 3.42 | 0.204 | 3.13 | 3.71 | 4-Acid Digestion |
| Er, Erbium (ppm) | 1.12 | 0.053 | 1.04 | 1.21 | 4-Acid Digestion |
| Eu, Europium (ppm) | 1.33 | 0.064 | 1.22 | 1.44 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 4.95 | 0.142 | 4.84 | 5.06 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 20.6 | 1.31 | 19.5 | 21.6 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 5.55 | 0.207 | 5.19 | 5.92 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 5.02 | 0.213 | 4.73 | 5.30 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.51 | 0.028 | 0.47 | 0.55 | 4-Acid Digestion |
| In, Indium (ppm) | 2.60 | 0.125 | 2.50 | 2.71 | 4-Acid Digestion |
| K, Potassium (wt.%) | 2.79 | 0.098 | 2.73 | 2.86 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 33.7 | 3.8 | 31.1 | 36.4 | 4-Acid Digestion |
| Li, Lithium (ppm) | 26.9 | 1.42 | 25.2 | 28.5 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.12 | 0.007 | 0.10 | 0.13 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.356 | 0.018 | 0.337 | 0.374 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.175 | 0.006 | 0.169 | 0.181 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 23.7 | 1.10 | 22.5 | 24.8 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 1.96 | 0.065 | 1.90 | 2.01 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 15.2 | 1.07 | 14.4 | 15.9 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 34.7 | 1.82 | 31.4 | 38.0 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 12.5 | 0.78 | 11.5 | 13.6 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.041 | 0.002 | 0.039 | 0.043 | 4-Acid Digestion |
| Pb, Lead (wt.%) | 0.261 | 0.011 | 0.253 | 0.268 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 9.34 | 0.848 | 8.22 | 10.46 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 144 | 6 | 137 | 150 | 4-Acid Digestion |
| Re, Rhenium (ppm) | 0.021 | 0.002 | 0.018 | 0.024 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 3.60 | 0.180 | 3.47 | 3.73 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 26.1 | 1.56 | 24.7 | 27.5 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 4.72 | 0.249 | 4.42 | 5.02 | 4-Acid Digestion |
| Se, Selenium (ppm) | 19.8 | 2.4 | 17.9 | 21.7 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 6.93 | 0.351 | 6.40 | 7.46 | 4-Acid Digestion |
| Sn, Tin (ppm) | 5.63 | 0.324 | 5.24 | 6.02 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 143 | 5 | 138 | 149 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 1.14 | 0.108 | 1.06 | 1.22 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.70 | 0.036 | 0.65 | 0.75 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 3.72 | 0.204 | 3.45 | 3.99 | 4-Acid Digestion |
| Th, Thorium (ppm) | 13.0 | 1.18 | 12.1 | 13.8 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.141 | 0.009 | 0.133 | 0.148 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 4.04 | 0.215 | 3.86 | 4.22 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.14 | 0.008 | 0.12 | 0.16 | 4-Acid Digestion |
| U, Uranium (ppm) | 4.97 | 0.215 | 4.76 | 5.19 | 4-Acid Digestion |
| V, Vanadium (ppm) | 18.1 | 1.17 | 16.6 | 19.7 | 4-Acid Digestion |
| W, Tungsten (ppm) | 2.94 | 0.202 | 2.74 | 3.13 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 14.1 | 0.85 | 13.2 | 15.0 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 0.82 | 0.033 | 0.77 | 0.87 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 176 | 8 | 168 | 185 | 4-Acid Digestion |
| Ag, Silver (ppm) | 10.1 | 0.53 | 9.7 | 10.5 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 0.690 | 0.037 | 0.653 | 0.727 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 189 | 6 | 182 | 195 | Aqua Regia Digestion |
| B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.67 | 0.09 | 0.60 | 0.73 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 12.5 | 0.34 | 12.1 | 12.9 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 0.729 | 0.032 | 0.697 | 0.761 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 27.4 | 1.16 | 26.3 | 28.5 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 42.5 | 2.04 | 40.1 | 44.8 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 31.0 | 1.44 | 29.9 | 32.1 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 16.6 | 0.91 | 15.5 | 17.7 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 1.92 | 0.095 | 1.78 | 2.06 | Aqua Regia Digestion |
| Cu, Copper (wt.%) | 1.76 | 0.046 | 1.73 | 1.80 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 4.28 | 0.204 | 4.15 | 4.41 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 3.68 | 0.45 | 3.39 | 3.97 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.13 | 0.02 | 0.10 | 0.15 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 1.05 | 0.102 | 0.96 | 1.13 | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 0.61 | 0.06 | 0.56 | 0.67 | Aqua Regia Digestion |
| In, Indium (ppm) | 2.49 | 0.115 | 2.39 | 2.60 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.250 | 0.026 | 0.233 | 0.267 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 20.2 | 1.69 | 19.1 | 21.3 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 9.69 | 1.15 | 8.69 | 10.70 | Aqua Regia Digestion |
| Lu, Lutetium (ppm) | 0.045 | 0.005 | 0.036 | 0.054 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 0.194 | 0.014 | 0.179 | 0.210 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.168 | 0.005 | 0.163 | 0.173 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 22.1 | 1.31 | 21.1 | 23.1 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.054 | 0.007 | 0.050 | 0.057 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.45 | 0.08 | 0.37 | 0.53 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 11.5 | 0.60 | 10.8 | 12.3 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.034 | 0.003 | 0.032 | 0.037 | Aqua Regia Digestion |
| Pb, Lead (wt.%) | 0.257 | 0.009 | 0.249 | 0.264 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 15.1 | 1.5 | 14.1 | 16.1 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | 0.020 | 0.001 | 0.018 | 0.023 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 3.54 | 0.194 | 3.43 | 3.66 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 19.6 | 1.50 | 18.5 | 20.7 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 1.16 | 0.15 | 1.05 | 1.27 | Aqua Regia Digestion |
| Se, Selenium (ppm) | 18.9 | 1.30 | 17.7 | 20.0 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 2.33 | 0.25 | 2.16 | 2.51 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 19.6 | 1.61 | 18.7 | 20.5 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.40 | 0.026 | 0.36 | 0.44 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 3.65 | 0.235 | 3.42 | 3.89 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 7.44 | 0.562 | 7.00 | 7.88 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.016 | 0.004 | 0.014 | 0.019 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 1.16 | 0.045 | 1.12 | 1.21 | Aqua Regia Digestion |
| U, Uranium (ppm) | 2.45 | 0.225 | 2.31 | 2.60 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 4.95 | 0.58 | 4.19 | 5.72 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 0.96 | 0.10 | 0.87 | 1.06 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 6.59 | 0.277 | 6.26 | 6.92 | Aqua Regia Digestion |
| Yb, Ytterbium (ppm) | 0.31 | 0.015 | 0.28 | 0.34 | Aqua Regia Digestion |
| Zn, Zinc (wt.%) | 1.03 | 0.026 | 1.01 | 1.05 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 37.2 | 3.9 | 33.9 | 40.6 | Aqua Regia Digestion |
Product Specifications
State
primary
Matrix
rhyodacite
Mineralisation
volcanic hosted massive sulphide
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 73 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 3.42 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 1.12 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 1.33 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 5.55 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.51 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 33.7 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.12 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 6.93 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.70 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.14 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 14.1 | - | - | - | 4-Acid Digestion |
| Cd - Cadmium (ppm) | 27.4 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 31.0 | - | - | - | Aqua Regia |
| Hg - Mercury (ppm) | 0.61 | - | - | - | Aqua Regia |
| Mo - Molybdenum (ppm) | 22.1 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 2.33 | - | - | - | Aqua Regia |
| Tl - Thallium (ppm) | 1.16 | - | - | - | 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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