OREAS 230b
primary
greenstone
orogenic lode gold
OREAS 230b
SKU: 230b
OREAS 230b 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 Cambrian greenstone was sourced from a
quarry 145km north of Melbourne, Australia. The Frogs Leg ore is hosted within
Archaean greenstones, with gold occurring in shear-hosted lodes associated with
quartz–carbonate veining, pyrite, and arsenopyrite.
Thirty-eight commercial analytical laboratories participated in the program
to certify the elements reported below using the following methods:
Gold by Pb collection fire assay (25-50 g charge weight) with AAS,
ICP-OES or ICP-MS finish
Gold by PhotonAssay™ with a recommended gross fill mass of 530-560 g
Gold by 15-50g aqua regia digestion with ICP-MS and AAS finish
Gold by cyanide leach (20-200g) via a variety of cyanide leach methods
(LeachWELL tablets, alkaline added sodium cyanide solution and sodium cyanide
liquor with LeachWELL powder) with ICP or AAS 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
To confirm homogeneity, gold by instrumental neutron activation analysis
(INAA) was undertaken on 20 x 85mg. This format enabled a nested ANOVA treatment
of the INAA results to compare within- and between-unit variances, providing a
statistical measure of batch homogeneity.
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) | 0.381 | 0.012 | 0.376 | 0.386 | Pb Fire Assay |
| Au, Gold (ppm) | 0.382 | 0.008 | 0.378 | 0.387 | Bi Fire Assay |
| Au, Gold (ppm) | 0.374 | 0.022 | 0.368 | 0.380 | PhotonAssay |
| Au, Gold (ppm) | 0.368 | 0.023 | 0.357 | 0.379 | Aqua Regia Digestion (sample weights 10-50g) |
| Au, Gold (ppm) | 0.363 | 0.026 | 0.352 | 0.375 | Cyanide Leach |
| Ag, Silver (ppm) | 0.195 | 0.017 | 0.171 | 0.218 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 6.82 | 0.185 | 6.64 | 6.99 | 4-Acid Digestion |
| As, Arsenic (ppm) | 26.8 | 1.28 | 25.7 | 28.0 | 4-Acid Digestion |
| Ba, Barium (ppm) | 94 | 3.9 | 90 | 98 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 0.37 | 0.024 | 0.35 | 0.39 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.23 | 0.019 | 0.21 | 0.25 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 7.22 | 0.147 | 7.04 | 7.40 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.31 | 0.025 | 0.27 | 0.34 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 11.1 | 0.66 | 10.5 | 11.6 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 44.4 | 1.99 | 43.0 | 45.8 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 86 | 12 | 79 | 94 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 0.42 | 0.028 | 0.39 | 0.44 | 4-Acid Digestion |
| Cu, Copper (ppm) | 180 | 7 | 174 | 185 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 4.25 | 0.415 | 3.75 | 4.75 | 4-Acid Digestion |
| Er, Erbium (ppm) | 2.67 | 0.161 | 2.29 | 3.04 | 4-Acid Digestion |
| Eu, Europium (ppm) | 1.00 | 0.072 | 0.89 | 1.11 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 8.96 | 0.219 | 8.75 | 9.18 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 15.7 | 0.62 | 15.0 | 16.4 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.62 | 0.172 | 3.22 | 4.01 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.78 | 0.162 | 1.61 | 1.96 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.91 | 0.080 | 0.79 | 1.03 | 4-Acid Digestion |
| In, Indium (ppm) | 0.080 | 0.004 | 0.073 | 0.087 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.180 | 0.009 | 0.173 | 0.188 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 4.35 | 0.247 | 4.12 | 4.58 | 4-Acid Digestion |
| Li, Lithium (ppm) | 10.1 | 0.57 | 9.6 | 10.6 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.37 | 0.027 | 0.34 | 0.41 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 3.82 | 0.132 | 3.72 | 3.91 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.151 | 0.008 | 0.145 | 0.156 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 0.57 | 0.11 | 0.42 | 0.71 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 2.00 | 0.051 | 1.95 | 2.04 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 3.75 | 0.172 | 3.55 | 3.95 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 8.67 | 0.569 | 7.84 | 9.51 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 68 | 4.1 | 65 | 71 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.052 | 0.001 | 0.050 | 0.053 | 4-Acid Digestion |
| Pb, Lead (ppm) | 9.59 | 1.29 | 8.62 | 10.56 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 1.65 | 0.055 | 1.54 | 1.76 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 4.64 | 0.317 | 4.36 | 4.93 | 4-Acid Digestion |
| Re, Rhenium (ppm) | 0.002 | 0.001 | 0.001 | 0.004 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.272 | 0.008 | 0.263 | 0.280 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 43.1 | 1.39 | 41.7 | 44.5 | 4-Acid Digestion |
| Se, Selenium (ppm) | 0.82 | 0.19 | 0.62 | 1.03 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 2.73 | 0.146 | 2.55 | 2.91 | 4-Acid Digestion |
| Sn, Tin (ppm) | 0.80 | 0.068 | 0.70 | 0.91 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 120 | 5 | 116 | 124 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.24 | 0.012 | 0.22 | 0.26 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.61 | 0.019 | 0.57 | 0.65 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.12 | 0.02 | 0.07 | 0.16 | 4-Acid Digestion |
| Th, Thorium (ppm) | 0.52 | 0.047 | 0.48 | 0.56 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.697 | 0.021 | 0.677 | 0.716 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.078 | 0.007 | 0.070 | 0.086 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.38 | 0.024 | 0.34 | 0.42 | 4-Acid Digestion |
| U, Uranium (ppm) | 0.18 | 0.03 | 0.17 | 0.19 | 4-Acid Digestion |
| V, Vanadium (ppm) | 314 | 12 | 304 | 325 | 4-Acid Digestion |
| W, Tungsten (ppm) | 9.14 | 0.303 | 8.81 | 9.47 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 23.4 | 1.04 | 22.4 | 24.3 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 2.53 | 0.144 | 2.29 | 2.77 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 109 | 6 | 104 | 114 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 56 | 4.4 | 51 | 61 | 4-Acid Digestion |
| Ag, Silver (ppm) | 0.181 | 0.016 | 0.164 | 0.197 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 3.40 | 0.221 | 3.24 | 3.56 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 25.7 | 1.40 | 24.1 | 27.3 | Aqua Regia Digestion |
| Ba, Barium (ppm) | 19.7 | 0.72 | 19.0 | 20.5 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.15 | 0.03 | 0.12 | 0.18 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 0.24 | 0.014 | 0.22 | 0.25 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 3.11 | 0.33 | 2.90 | 3.32 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.27 | 0.013 | 0.24 | 0.29 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 6.15 | 0.63 | 5.67 | 6.62 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 32.6 | 1.42 | 30.9 | 34.2 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 21.6 | 1.24 | 20.3 | 22.9 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 0.34 | 0.018 | 0.32 | 0.36 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 179 | 6 | 171 | 186 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 6.38 | 0.197 | 6.14 | 6.61 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 11.1 | 1.00 | 10.2 | 11.9 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.17 | 0.04 | 0.13 | 0.22 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.51 | 0.045 | 0.47 | 0.55 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.030 | 0.003 | 0.028 | 0.033 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.050 | 0.000 | 0.049 | 0.051 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 2.34 | 0.168 | 2.17 | 2.51 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 9.22 | 0.296 | 8.88 | 9.56 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 1.96 | 0.047 | 1.90 | 2.01 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.088 | 0.004 | 0.085 | 0.092 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 0.51 | 0.028 | 0.47 | 0.56 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.108 | 0.013 | 0.096 | 0.120 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 44.4 | 2.40 | 41.8 | 47.0 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.048 | 0.003 | 0.045 | 0.050 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 8.41 | 0.478 | 7.96 | 8.86 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 2.24 | 0.173 | 2.08 | 2.40 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.266 | 0.013 | 0.253 | 0.280 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 0.52 | 0.12 | 0.37 | 0.67 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 6.01 | 1.33 | 5.10 | 6.91 | Aqua Regia Digestion |
| Se, Selenium (ppm) | 0.58 | 0.10 | 0.45 | 0.71 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 0.46 | 0.12 | 0.37 | 0.55 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 23.5 | 3.5 | 21.1 | 25.9 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 0.10 | 0.01 | 0.09 | 0.12 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 0.35 | 0.05 | 0.33 | 0.38 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.359 | 0.069 | 0.313 | 0.405 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.045 | 0.005 | 0.036 | 0.055 | Aqua Regia Digestion |
| U, Uranium (ppm) | 0.11 | 0.01 | 0.09 | 0.12 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 169 | 16 | 157 | 181 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 6.59 | 0.89 | 5.94 | 7.24 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 12.1 | 1.7 | 11.0 | 13.3 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 96 | 3.9 | 92 | 99 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 18.1 | 3.1 | 15.7 | 20.5 | 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) | 11.1 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 4.25 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 2.67 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 1.00 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 3.62 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.91 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 4.35 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.37 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 8.67 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 1.65 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 2.73 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.61 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.38 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 23.4 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 2.53 | - | - | - | 4-Acid Digestion |
| Ag - Silver (ppm) | 0.181 | - | - | - | Aqua Regia |
| As - Arsenic (ppm) | 25.7 | - | - | - | Aqua Regia |
| Bi - Bismuth (ppm) | 0.24 | - | - | - | Aqua Regia |
| Cd - Cadmium (ppm) | 0.27 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 32.6 | - | - | - | Aqua Regia |
| Cu - Copper (ppm) | 179 | - | - | - | Aqua Regia |
| Mo - Molybdenum (ppm) | 0.51 | - | - | - | Aqua Regia |
| Ni - Nickel (ppm) | 44.4 | - | - | - | Aqua Regia |
| Pb - Lead (ppm) | 8.41 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 0.46 | - | - | - | Aqua Regia |
| Te - Tellurium (ppm) | 0.10 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 96 | - | - | - | 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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