OREAS 242b
primary
greenstone
orogenic lode gold
OREAS 242b
SKU: 242b
OREAS 242b 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. Thirty-one commercial analytical
laboratories participated in the program to certify the elements shown below.
The following methods were employed:
Gold by fire assay (15-40g charge weight) with AAS, ICP-OES or ICP-MS
finish (31 laboratories);
Gold by aqua regia digestion (15-50g sample weight) with ICP-MS, AAS or
ICP-OES finish (22 laboratories);
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 (20 laboratories);
Gold by x-ray photon assay Gold by x-ray PhotonAssay with recommended
gross mass 520-550g (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 aqua regia digestion (up to 25
laboratories depending on the element);
Full ICP-OES and ICP-MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl)
digestion (up to 25 laboratories depending on the element).
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 >1 ppm, Au only
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppm) | 8.73 | 0.198 | 8.65 | 8.81 | Pb Fire Assay |
| Au, Gold (ppm) | 8.80 | 0.181 | 8.72 | 8.88 | PhotonAssay |
| Au, Gold (ppm) | 8.52 | 0.328 | 8.38 | 8.66 | Aqua Regia Digestion (sample weights 10-50g) |
| Au, Gold (ppm) | 8.42 | 0.311 | 8.29 | 8.56 | Cyanide Leach |
| Ag, Silver (ppm) | 4.75 | 0.152 | 4.56 | 4.94 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 6.53 | 0.255 | 6.36 | 6.71 | 4-Acid Digestion |
| As, Arsenic (ppm) | 53 | 2.8 | 51 | 56 | 4-Acid Digestion |
| Ba, Barium (ppm) | 153 | 6 | 146 | 159 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 0.46 | 0.07 | 0.40 | 0.53 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.39 | 0.020 | 0.37 | 0.41 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 6.31 | 0.249 | 6.14 | 6.48 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.40 | 0.032 | 0.35 | 0.44 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 17.0 | 0.62 | 16.3 | 17.6 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 39.6 | 1.39 | 38.1 | 41.1 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 107 | 8 | 100 | 114 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 1.08 | 0.043 | 1.01 | 1.15 | 4-Acid Digestion |
| Cu, Copper (ppm) | 173 | 5 | 168 | 179 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 3.83 | 0.160 | 3.63 | 4.03 | 4-Acid Digestion |
| Er, Erbium (ppm) | 2.30 | 0.125 | 2.15 | 2.44 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.90 | 0.075 | 0.82 | 0.99 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 7.50 | 0.289 | 7.29 | 7.71 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 15.8 | 0.71 | 15.1 | 16.5 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.35 | 0.140 | 3.14 | 3.55 | 4-Acid Digestion |
| Ge, Germanium (ppm) | 0.13 | 0.04 | 0.09 | 0.17 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 1.74 | 0.067 | 1.62 | 1.85 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.77 | 0.034 | 0.71 | 0.82 | 4-Acid Digestion |
| In, Indium (ppm) | 0.074 | 0.005 | 0.065 | 0.083 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.363 | 0.017 | 0.350 | 0.376 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 7.60 | 0.548 | 7.21 | 8.00 | 4-Acid Digestion |
| Li, Lithium (ppm) | 19.7 | 1.36 | 18.7 | 20.6 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.32 | 0.014 | 0.29 | 0.35 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 3.52 | 0.088 | 3.44 | 3.60 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.126 | 0.005 | 0.121 | 0.131 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 8.20 | 0.467 | 7.75 | 8.65 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 1.73 | 0.057 | 1.68 | 1.78 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 3.89 | 0.190 | 3.71 | 4.07 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 9.90 | 0.331 | 9.45 | 10.36 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 75 | 2.8 | 73 | 78 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.040 | 0.002 | 0.038 | 0.042 | 4-Acid Digestion |
| Pb, Lead (ppm) | 19.0 | 1.06 | 17.8 | 20.2 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 2.21 | 0.096 | 2.08 | 2.33 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 14.7 | 0.88 | 14.0 | 15.4 | 4-Acid Digestion |
| Re, Rhenium (ppm) | 0.002 | 0.001 | 0.001 | 0.003 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.265 | 0.015 | 0.251 | 0.278 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 3.46 | 0.264 | 3.22 | 3.69 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 37.2 | 1.84 | 35.3 | 39.0 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 2.78 | 0.160 | 2.55 | 3.02 | 4-Acid Digestion |
| Sn, Tin (ppm) | 1.00 | 0.14 | 0.88 | 1.12 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 185 | 8 | 179 | 192 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.26 | 0.009 | 0.24 | 0.28 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.58 | 0.06 | 0.50 | 0.66 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.16 | 0.03 | 0.13 | 0.20 | 4-Acid Digestion |
| Th, Thorium (ppm) | 1.63 | 0.117 | 1.54 | 1.72 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.568 | 0.020 | 0.552 | 0.584 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.17 | 0.009 | 0.16 | 0.18 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.31 | 0.016 | 0.29 | 0.33 | 4-Acid Digestion |
| U, Uranium (ppm) | 0.44 | 0.040 | 0.38 | 0.50 | 4-Acid Digestion |
| V, Vanadium (ppm) | 257 | 7 | 249 | 265 | 4-Acid Digestion |
| W, Tungsten (ppm) | 16.1 | 0.75 | 15.2 | 16.9 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 20.1 | 0.82 | 19.2 | 20.9 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 2.16 | 0.109 | 2.03 | 2.29 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 115 | 7 | 111 | 120 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 55 | 3.8 | 50 | 59 | 4-Acid Digestion |
| Ag, Silver (ppm) | 4.58 | 0.156 | 4.44 | 4.73 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 3.00 | 0.116 | 2.90 | 3.09 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 51 | 2.2 | 49 | 53 | Aqua Regia Digestion |
| B, Boron (ppm) | 14.7 | 4.6 | 11.7 | 17.8 | Aqua Regia Digestion |
| Ba, Barium (ppm) | 30.3 | 2.24 | 28.6 | 32.0 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.20 | 0.03 | 0.18 | 0.23 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 0.40 | 0.019 | 0.38 | 0.42 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 2.22 | 0.44 | 1.98 | 2.46 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.37 | 0.028 | 0.34 | 0.40 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 10.8 | 1.4 | 9.9 | 11.8 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 27.3 | 1.44 | 26.2 | 28.4 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 21.0 | 1.68 | 19.9 | 22.2 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 0.58 | 0.036 | 0.54 | 0.61 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 170 | 5 | 165 | 176 | Aqua Regia Digestion |
| Eu, Europium (ppm) | 0.44 | 0.10 | 0.33 | 0.56 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 5.29 | 0.153 | 5.17 | 5.41 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 9.50 | 0.536 | 8.96 | 10.03 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.14 | 0.02 | 0.11 | 0.17 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.47 | 0.040 | 0.42 | 0.52 | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 0.070 | 0.015 | 0.047 | 0.093 | Aqua Regia Digestion |
| Ho, Holmium (ppm) | 0.44 | 0.07 | 0.33 | 0.55 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.032 | 0.002 | 0.029 | 0.035 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.108 | 0.007 | 0.101 | 0.116 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 3.92 | 0.45 | 3.61 | 4.22 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 9.17 | 0.782 | 8.62 | 9.71 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 1.56 | 0.053 | 1.52 | 1.60 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.067 | 0.002 | 0.065 | 0.068 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 7.85 | 0.517 | 7.47 | 8.23 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.117 | 0.010 | 0.109 | 0.125 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.12 | 0.03 | 0.08 | 0.15 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 48.5 | 2.20 | 46.7 | 50.2 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.038 | 0.002 | 0.036 | 0.039 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 16.9 | 0.76 | 16.2 | 17.5 | Aqua Regia Digestion |
| Pr, Praseodymium (ppm) | 1.41 | 0.29 | 1.01 | 1.81 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 6.03 | 0.440 | 5.64 | 6.41 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | 0.002 | 0.000 | 0.001 | 0.002 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.261 | 0.011 | 0.250 | 0.271 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 1.67 | 0.27 | 1.50 | 1.84 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 4.82 | 0.65 | 4.33 | 5.31 | Aqua Regia Digestion |
| Se, Selenium (ppm) | 0.88 | 0.17 | 0.65 | 1.10 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 0.63 | 0.09 | 0.54 | 0.72 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 30.3 | 4.9 | 27.1 | 33.5 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.31 | 0.03 | 0.26 | 0.36 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 0.15 | 0.02 | 0.12 | 0.17 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 0.92 | 0.11 | 0.83 | 1.01 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.319 | 0.047 | 0.290 | 0.348 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.094 | 0.007 | 0.085 | 0.103 | Aqua Regia Digestion |
| U, Uranium (ppm) | 0.24 | 0.018 | 0.22 | 0.27 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 125 | 9 | 118 | 131 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 10.6 | 1.5 | 9.6 | 11.7 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 10.7 | 0.45 | 10.2 | 11.2 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 101 | 5 | 97 | 104 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 16.0 | 1.21 | 14.9 | 17.1 | 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) | 17.0 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 3.83 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 2.30 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 0.90 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 3.35 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.77 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 7.60 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.32 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 9.90 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 2.21 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 2.78 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.58 | - | - | - | 4-Acid Digestion |
| Tm - Thulium (ppm) | 0.31 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 20.1 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 2.16 | - | - | - | 4-Acid Digestion |
| Ag - Silver (ppm) | 4.58 | - | - | - | Aqua Regia |
| As - Arsenic (ppm) | 51 | - | - | - | Aqua Regia |
| Bi - Bismuth (ppm) | 0.40 | - | - | - | Aqua Regia |
| Cd - Cadmium (ppm) | 0.37 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 27.3 | - | - | - | Aqua Regia |
| Cu - Copper (ppm) | 170 | - | - | - | Aqua Regia |
| Hg - Mercury (ppm) | 0.070 | - | - | - | Aqua Regia |
| Mo - Molybdenum (ppm) | 7.85 | - | - | - | Aqua Regia |
| Sb - Antimony (ppm) | 1.67 | - | - | - | Aqua Regia |
| Se - Selenium (ppm) | 0.88 | - | - | - | Aqua Regia |
| Te - Tellurium (ppm) | 0.15 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 101 | - | - | - | 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
Need Assistance?
Contact our technical team for custom orders, bulk pricing, or analytical support.
Contact Us