OREAS 211b
primary
greenstone
orogenic lode gold
OREAS 211b
SKU: 211b
OREAS 211b was prepared from a blend of gold ore and barren greenstone. The
ore was sourced from the Frogs Leg Gold Mine located 19km west of Kalgoorlie in
Western Australia. The Cambrian greenstone was sourced from a quarry 145km north
of Melbourne, Australia.Thirty-one commercial analytical laboratories
participated in the program to certify the elements reported below.
Gold by fire assay (25-50g charge weight) with AAS and ICP-OES finish;
Gold by aqua regia digestion (15-50g sample weight) with ICP-OES and/or
ICP-MS finish;
Gold by cyanide leach (20-200g) with AAS or ICP-MS finish;
Gold by x-ray PhotonAssay with recommended gross mass 500-540 g (12
Chrysos PhotonAssay units at 7 laboratories with two rounds of data reported
from each unit);
Full ICP-OES and ICP-MS elemental suites by 4-acid digestion;
Full ICP-OES and ICP-MS elemental suites by aqua regia digestion.
To confirm homogeneity, gold by instrumental neutron activation analysis
(INAA) was undertaken on 20 x 85mg subsamples (see Table 6 in the
‘Homogeneity Evaluation’ section of the Certificate).
Specifications
- State: primary
- Matrix: greenstone
- Mineralisation: orogenic lode gold
- CRM Group: Au, Au only
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppm) | 0.798 | 0.025 | 0.787 | 0.809 | Pb Fire Assay |
| Au, Gold (ppm) | 0.800 | 0.032 | 0.794 | 0.806 | PhotonAssay |
| Au, Gold (ppm) | 0.750 | 0.028 | 0.738 | 0.761 | Aqua Regia Digestion (sample weights 10-50g) |
| Au, Gold (ppm) | 0.776 | 0.035 | 0.760 | 0.793 | Cyanide Leach |
| Ag, Silver (ppm) | 0.334 | 0.022 | 0.305 | 0.362 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 6.94 | 0.252 | 6.72 | 7.16 | 4-Acid Digestion |
| As, Arsenic (ppm) | 33.7 | 1.32 | 32.0 | 35.5 | 4-Acid Digestion |
| Ba, Barium (ppm) | 151 | 3 | 146 | 157 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 0.34 | 0.030 | 0.30 | 0.38 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.041 | 0.010 | 0.028 | 0.054 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 6.93 | 0.259 | 6.72 | 7.15 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.45 | 0.036 | 0.41 | 0.50 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 11.7 | 0.47 | 11.1 | 12.3 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 44.4 | 1.34 | 42.7 | 46.1 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 121 | 11 | 112 | 130 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 0.69 | 0.028 | 0.65 | 0.72 | 4-Acid Digestion |
| Cu, Copper (ppm) | 177 | 5 | 171 | 183 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 3.90 | 0.168 | 3.65 | 4.16 | 4-Acid Digestion |
| Er, Erbium (ppm) | 2.34 | 0.103 | 2.18 | 2.50 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.98 | 0.10 | 0.87 | 1.09 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 7.97 | 0.230 | 7.79 | 8.15 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 16.0 | 0.65 | 15.3 | 16.6 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.28 | 0.144 | 3.06 | 3.51 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.55 | 0.068 | 1.45 | 1.65 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.79 | 0.029 | 0.74 | 0.84 | 4-Acid Digestion |
| In, Indium (ppm) | 0.073 | 0.005 | 0.066 | 0.080 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.362 | 0.017 | 0.347 | 0.377 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 4.74 | 0.265 | 4.50 | 4.98 | 4-Acid Digestion |
| Li, Lithium (ppm) | 11.6 | 1.06 | 10.9 | 12.2 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.34 | 0.016 | 0.31 | 0.37 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 3.88 | 0.104 | 3.78 | 3.97 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.135 | 0.006 | 0.131 | 0.140 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 1.52 | 0.098 | 1.40 | 1.64 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 1.90 | 0.051 | 1.85 | 1.96 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 3.43 | 0.198 | 3.23 | 3.63 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 8.13 | 0.316 | 7.59 | 8.67 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 94 | 3.9 | 91 | 98 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.041 | 0.002 | 0.040 | 0.043 | 4-Acid Digestion |
| Pb, Lead (ppm) | 14.8 | 1.02 | 13.6 | 16.0 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 1.67 | 0.048 | 1.58 | 1.75 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 10.1 | 0.67 | 9.5 | 10.7 | 4-Acid Digestion |
| Re, Rhenium (ppm) | 0.002 | 0.001 | 0.001 | 0.003 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.267 | 0.012 | 0.254 | 0.280 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 1.38 | 0.082 | 1.27 | 1.48 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 41.1 | 1.85 | 39.4 | 42.8 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 2.52 | 0.096 | 2.30 | 2.73 | 4-Acid Digestion |
| Sn, Tin (ppm) | 0.92 | 0.088 | 0.81 | 1.02 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 213 | 7 | 207 | 220 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.22 | 0.013 | 0.21 | 0.24 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.58 | 0.056 | 0.51 | 0.65 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.081 | 0.021 | 0.057 | 0.105 | 4-Acid Digestion |
| Th, Thorium (ppm) | 0.74 | 0.032 | 0.69 | 0.79 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.633 | 0.034 | 0.610 | 0.656 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.15 | 0.005 | 0.14 | 0.16 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.33 | 0.03 | 0.30 | 0.36 | 4-Acid Digestion |
| U, Uranium (ppm) | 0.20 | 0.011 | 0.19 | 0.22 | 4-Acid Digestion |
| V, Vanadium (ppm) | 282 | 9 | 273 | 291 | 4-Acid Digestion |
| W, Tungsten (ppm) | 16.8 | 0.78 | 16.2 | 17.5 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 20.3 | 0.83 | 19.4 | 21.2 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 2.18 | 0.084 | 2.00 | 2.36 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 126 | 5 | 122 | 131 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 47.1 | 2.86 | 44.2 | 50.0 | 4-Acid Digestion |
| Ag, Silver (ppm) | 0.339 | 0.035 | 0.310 | 0.368 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 3.28 | 0.169 | 3.14 | 3.42 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 32.6 | 1.65 | 31.2 | 34.1 | Aqua Regia Digestion |
| B, Boron (ppm) | 20.0 | 1.06 | 18.8 | 21.2 | Aqua Regia Digestion |
| Ba, Barium (ppm) | 29.3 | 2.40 | 27.8 | 30.9 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.19 | 0.02 | 0.16 | 0.22 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 0.033 | 0.005 | 0.024 | 0.042 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 2.36 | 0.44 | 2.12 | 2.60 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.42 | 0.033 | 0.39 | 0.46 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 8.66 | 0.740 | 8.06 | 9.25 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 31.1 | 1.03 | 30.0 | 32.2 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 19.3 | 1.59 | 18.1 | 20.5 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 0.49 | 0.018 | 0.46 | 0.51 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 176 | 6 | 171 | 181 | Aqua Regia Digestion |
| Eu, Europium (ppm) | 0.50 | 0.13 | 0.35 | 0.64 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 5.63 | 0.161 | 5.52 | 5.73 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 9.96 | 0.873 | 9.29 | 10.63 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.14 | 0.03 | 0.11 | 0.17 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.44 | 0.037 | 0.39 | 0.49 | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 0.052 | 0.018 | 0.033 | 0.070 | Aqua Regia Digestion |
| Ho, Holmium (ppm) | 0.48 | 0.08 | 0.36 | 0.60 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.103 | 0.008 | 0.095 | 0.112 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 3.54 | 0.347 | 3.29 | 3.79 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 10.0 | 0.56 | 9.6 | 10.5 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 1.71 | 0.061 | 1.66 | 1.76 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.073 | 0.003 | 0.070 | 0.075 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 1.48 | 0.084 | 1.40 | 1.57 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.137 | 0.008 | 0.129 | 0.146 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.12 | 0.03 | 0.08 | 0.15 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 65 | 2.7 | 62 | 68 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.040 | 0.002 | 0.039 | 0.042 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 14.3 | 0.84 | 13.6 | 15.1 | Aqua Regia Digestion |
| Pr, Praseodymium (ppm) | 1.32 | 0.26 | 0.96 | 1.69 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 4.36 | 0.164 | 4.13 | 4.59 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | 0.002 | 0.000 | 0.001 | 0.003 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.266 | 0.016 | 0.254 | 0.277 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 0.88 | 0.10 | 0.78 | 0.98 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 5.17 | 0.71 | 4.69 | 5.65 | Aqua Regia Digestion |
| Se, Selenium (ppm) | 0.59 | 0.14 | 0.44 | 0.73 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 0.53 | 0.10 | 0.45 | 0.62 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 35.3 | 6.3 | 30.9 | 39.7 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.32 | 0.05 | 0.26 | 0.38 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 0.061 | 0.009 | 0.044 | 0.078 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 0.58 | 0.08 | 0.51 | 0.65 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.371 | 0.048 | 0.340 | 0.402 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.077 | 0.006 | 0.069 | 0.085 | Aqua Regia Digestion |
| U, Uranium (ppm) | 0.14 | 0.01 | 0.13 | 0.16 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 136 | 12 | 126 | 146 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 11.0 | 1.6 | 9.9 | 12.1 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 11.2 | 0.55 | 10.6 | 11.8 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 113 | 5 | 109 | 117 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 14.7 | 1.33 | 13.5 | 15.9 | Aqua Regia Digestion |
Product Specifications
State
primary
Matrix
greenstone
Mineralisation
orogenic lode gold
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 11.7 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 3.90 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 2.34 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 0.98 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 3.28 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.79 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 4.74 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.34 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 8.13 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 1.67 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 2.52 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.58 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.33 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 20.3 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 2.18 | - | - | - | 4-Acid Digestion |
| Ag - Silver (ppm) | 0.339 | - | - | - | Aqua Regia |
| As - Arsenic (ppm) | 32.6 | - | - | - | Aqua Regia |
| Bi - Bismuth (ppm) | 0.033 | - | - | - | Aqua Regia |
| Cd - Cadmium (ppm) | 0.42 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 31.1 | - | - | - | Aqua Regia |
| Cu - Copper (ppm) | 176 | - | - | - | Aqua Regia |
| Hg - Mercury (ppm) | 0.052 | - | - | - | Aqua Regia |
| Ni - Nickel (ppm) | 65 | - | - | - | Aqua Regia |
| Pb - Lead (ppm) | 14.3 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 0.53 | - | - | - | Aqua Regia |
| Tl - Thallium (ppm) | 0.077 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 113 | - | - | - | 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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