OREAS 231
primary
greenstone
orogenic lode gold
OREAS 231
SKU: 231
OREAS 231 was prepared from a blend of gold-bearing ore and barren
greenstone. The ore was sourced from the Frogs Leg Gold Mine located 19km west
of Kalgoorlie in Western Australia. The ore lodes lie within sheared contacts
between volcaniclastics and basalt and are hosted in laminated quartz veins,
breccia and wall rock alteration. The Cambrian greenstone was sourced from a
quarry 145km north of Melbourne, Australia.
Thirty-five commercial analytical laboratories participated in the program to
certify:
Gold by fire assay;
Full ICP-OES and ICP-MS elemental suites by 4-acid digestion;
Gold by 15-50g aqua regia digestion;
Gold by cyanide leach.
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) | 0.542 | 0.015 | 0.538 | 0.547 | Pb Fire Assay |
| Au, Gold (ppm) | 0.521 | 0.018 | 0.513 | 0.528 | Aqua Regia Digestion (sample weights 10-50g) |
| Au, Gold (ppm) | 0.516 | 0.027 | 0.504 | 0.527 | Cyanide Leach |
| Ag, Silver (ppm) | 0.177 | 0.024 | 0.166 | 0.188 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 7.14 | 0.256 | 7.03 | 7.24 | 4-Acid Digestion |
| As, Arsenic (ppm) | 27.2 | 2.08 | 26.3 | 28.2 | 4-Acid Digestion |
| Ba, Barium (ppm) | 112 | 4 | 110 | 114 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 0.36 | 0.05 | 0.34 | 0.38 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.037 | 0.010 | 0.033 | 0.041 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 7.47 | 0.256 | 7.36 | 7.58 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.35 | 0.05 | 0.33 | 0.38 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 11.0 | 0.72 | 10.6 | 11.3 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 44.7 | 2.92 | 43.5 | 45.8 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 133 | 18 | 125 | 141 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 0.56 | 0.019 | 0.55 | 0.57 | 4-Acid Digestion |
| Cu, Copper (ppm) | 161 | 9 | 157 | 164 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 3.71 | 0.138 | 3.63 | 3.79 | 4-Acid Digestion |
| Er, Erbium (ppm) | 2.35 | 0.129 | 2.27 | 2.43 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.93 | 0.062 | 0.89 | 0.98 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 8.05 | 0.281 | 7.94 | 8.17 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 15.9 | 0.55 | 15.7 | 16.2 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.23 | 0.188 | 3.11 | 3.35 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.63 | 0.125 | 1.57 | 1.68 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.82 | 0.045 | 0.79 | 0.86 | 4-Acid Digestion |
| In, Indium (ppm) | 0.070 | 0.006 | 0.068 | 0.073 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.288 | 0.012 | 0.283 | 0.294 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 4.47 | 0.257 | 4.36 | 4.58 | 4-Acid Digestion |
| Li, Lithium (ppm) | 11.1 | 0.94 | 10.6 | 11.5 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.33 | 0.017 | 0.31 | 0.34 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 3.90 | 0.149 | 3.84 | 3.97 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.139 | 0.007 | 0.136 | 0.142 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 0.86 | 0.09 | 0.82 | 0.90 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 1.75 | 0.052 | 1.73 | 1.77 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 3.50 | 0.282 | 3.37 | 3.62 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 7.98 | 0.303 | 7.81 | 8.15 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 88 | 5.4 | 86 | 90 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.039 | 0.002 | 0.038 | 0.040 | 4-Acid Digestion |
| Pb, Lead (ppm) | 12.8 | 1.20 | 12.2 | 13.4 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 1.66 | 0.077 | 1.61 | 1.70 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 8.08 | 0.437 | 7.89 | 8.26 | 4-Acid Digestion |
| Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.220 | 0.015 | 0.213 | 0.227 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 0.71 | 0.061 | 0.68 | 0.74 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 42.2 | 2.36 | 41.2 | 43.2 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 2.49 | 0.143 | 2.41 | 2.57 | 4-Acid Digestion |
| Sn, Tin (ppm) | 0.90 | 0.13 | 0.84 | 0.96 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 179 | 7 | 177 | 182 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.22 | 0.015 | 0.21 | 0.23 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.58 | 0.038 | 0.55 | 0.60 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.068 | 0.010 | 0.063 | 0.073 | 4-Acid Digestion |
| Th, Thorium (ppm) | 0.72 | 0.08 | 0.69 | 0.75 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.617 | 0.027 | 0.606 | 0.629 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.12 | 0.008 | 0.11 | 0.12 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.33 | 0.028 | 0.32 | 0.35 | 4-Acid Digestion |
| U, Uranium (ppm) | 0.20 | 0.006 | 0.20 | 0.20 | 4-Acid Digestion |
| V, Vanadium (ppm) | 285 | 17 | 278 | 292 | 4-Acid Digestion |
| W, Tungsten (ppm) | 15.2 | 1.07 | 14.7 | 15.7 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 20.7 | 0.89 | 20.4 | 21.1 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 2.20 | 0.124 | 2.14 | 2.27 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 113 | 5 | 111 | 115 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 50 | 4.3 | 49 | 52 | 4-Acid 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) | 11.0 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 3.71 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 2.35 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 0.93 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 3.23 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.82 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 4.47 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.33 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 7.98 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 1.66 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 2.49 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.58 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.33 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 20.7 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 2.20 | - | - | - | 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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