OREAS 61h
primary
andesite
low sulphidation epithermal
OREAS 61h
SKU: 61h
OREAS 61h was prepared from coarse reject splits of gold-silver ore samples
blended with barren andesite. The gold-silver ore was sourced from the Cracow
mine located 500km northwest of Brisbane in Queensland, Australia. The barren
andesite was sourced from the Carboniferous Blair Duguid Hypersthene Andesite
intrusive, located 70kms northwest of Newcastle, Australia. Cracow is a low
sulphidation epithermal deposit hosted by meta-andesitic volcanics. High grade
gold mineralisation occurs within fissure quartz veins and is associated with
zones of silicification, present as quartz lode breccia and as quartz vein
breccia.
Twenty-nine analytical laboratories participated in the program to certify
the elements reported below. The following methods were employed:
Au by lead collection fire assay with AAS (23 laboratories) or ICP-OES (6
laboratories) finish;
Gold by aqua regia digestion on 10-50g sample weights with ICP-OES and/or
ICP-MS (12 laboratories) and AAS (6 laboratories);
4-acid (HF-HNO3-HClO4-HCl) digestion for full ICP-OES and ICP-MS elemental
suites (up to 26 laboratories depending on the element);
Aqua regia digestion for full ICP-OES and ICP-MS elemental suites (up to
26 laboratories depending on the element).
Instrumental neutron activation analysis for Au on 20 x 85mg subsamples was
also undertaken at ANSTO, Lucas Heights to confirm
homogeneity.
Specifications
- State: primary
- Matrix: andesite
- Mineralisation: low sulphidation epithermal
- CRM Group: Au >1 ppm, Au-Ag ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppm) | 4.42 | 0.107 | 4.38 | 4.46 | Pb Fire Assay |
| Au, Gold (ppm) | 4.35 | 0.220 | 4.24 | 4.46 | Aqua Regia Digestion (sample weights 10-50g) |
| Ag, Silver (ppm) | 3.65 | 0.146 | 3.50 | 3.79 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 6.75 | 0.196 | 6.59 | 6.91 | 4-Acid Digestion |
| As, Arsenic (ppm) | 292 | 14 | 282 | 302 | 4-Acid Digestion |
| Ba, Barium (ppm) | 433 | 13 | 421 | 445 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 1.06 | 0.097 | 1.00 | 1.12 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.14 | 0.012 | 0.13 | 0.15 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 3.35 | 0.098 | 3.27 | 3.43 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.25 | 0.022 | 0.23 | 0.27 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 32.7 | 2.28 | 30.7 | 34.6 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 13.9 | 0.63 | 13.3 | 14.5 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 22.3 | 2.3 | 20.8 | 23.8 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 5.05 | 0.243 | 4.86 | 5.23 | 4-Acid Digestion |
| Cu, Copper (ppm) | 84 | 2.6 | 81 | 86 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 2.42 | 0.192 | 2.23 | 2.61 | 4-Acid Digestion |
| Er, Erbium (ppm) | 1.46 | 0.106 | 1.34 | 1.58 | 4-Acid Digestion |
| Eu, Europium (ppm) | 0.86 | 0.034 | 0.80 | 0.92 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 3.78 | 0.117 | 3.70 | 3.86 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 14.9 | 0.39 | 14.4 | 15.4 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 2.99 | 0.144 | 2.80 | 3.19 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 2.48 | 0.156 | 2.37 | 2.59 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.52 | 0.034 | 0.47 | 0.57 | 4-Acid Digestion |
| In, Indium (ppm) | 0.048 | 0.007 | 0.040 | 0.055 | 4-Acid Digestion |
| K, Potassium (wt.%) | 2.08 | 0.064 | 2.03 | 2.12 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 15.3 | 0.82 | 14.5 | 16.1 | 4-Acid Digestion |
| Li, Lithium (ppm) | 42.4 | 1.64 | 41.4 | 43.4 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.21 | 0.012 | 0.20 | 0.23 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 1.37 | 0.058 | 1.34 | 1.41 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.088 | 0.002 | 0.085 | 0.090 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 3.82 | 0.269 | 3.63 | 4.01 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 1.70 | 0.062 | 1.66 | 1.74 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 3.40 | 0.170 | 3.26 | 3.53 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 16.3 | 1.11 | 15.2 | 17.4 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 13.4 | 0.62 | 12.9 | 14.0 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.083 | 0.004 | 0.080 | 0.085 | 4-Acid Digestion |
| Pb, Lead (ppm) | 26.8 | 1.12 | 25.7 | 27.9 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 4.01 | 0.249 | 3.76 | 4.25 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 79 | 4.8 | 75 | 83 | 4-Acid Digestion |
| Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.581 | 0.026 | 0.563 | 0.598 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 269 | 12 | 261 | 277 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 15.1 | 0.60 | 14.5 | 15.7 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 3.40 | 0.168 | 3.13 | 3.66 | 4-Acid Digestion |
| Sn, Tin (ppm) | 1.08 | 0.075 | 1.00 | 1.16 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 387 | 16 | 375 | 398 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 0.21 | 0.014 | 0.19 | 0.22 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.42 | 0.041 | 0.39 | 0.46 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 1.13 | 0.107 | 1.03 | 1.23 | 4-Acid Digestion |
| Th, Thorium (ppm) | 3.83 | 0.196 | 3.61 | 4.05 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.356 | 0.011 | 0.347 | 0.365 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.63 | 0.036 | 0.60 | 0.66 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 0.21 | 0.009 | 0.19 | 0.22 | 4-Acid Digestion |
| U, Uranium (ppm) | 1.01 | 0.073 | 0.93 | 1.08 | 4-Acid Digestion |
| V, Vanadium (ppm) | 124 | 5 | 121 | 128 | 4-Acid Digestion |
| W, Tungsten (ppm) | 4.15 | 0.259 | 3.95 | 4.34 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 13.5 | 0.64 | 13.0 | 14.0 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 1.44 | 0.060 | 1.32 | 1.56 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 101 | 4 | 98 | 104 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 91 | 4.9 | 88 | 95 | 4-Acid Digestion |
| Ag, Silver (ppm) | 3.65 | 0.166 | 3.53 | 3.76 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 2.13 | 0.110 | 2.07 | 2.20 | Aqua Regia Digestion |
| As, Arsenic (ppm) | 284 | 14 | 277 | 291 | Aqua Regia Digestion |
| B, Boron (ppm) | 9.23 | 1.75 | 7.98 | 10.49 | Aqua Regia Digestion |
| Ba, Barium (ppm) | 67 | 5.9 | 63 | 70 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.53 | 0.028 | 0.51 | 0.55 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 0.14 | 0.008 | 0.13 | 0.14 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 2.78 | 0.086 | 2.71 | 2.84 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.24 | 0.019 | 0.22 | 0.26 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 28.0 | 1.38 | 26.9 | 29.0 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 13.2 | 0.65 | 12.7 | 13.7 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 18.8 | 1.21 | 17.9 | 19.8 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 2.61 | 0.28 | 2.45 | 2.78 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 84 | 3.2 | 81 | 86 | Aqua Regia Digestion |
| Dy, Dysprosium (ppm) | 1.93 | 0.159 | 1.73 | 2.13 | Aqua Regia Digestion |
| Er, Erbium (ppm) | 0.94 | 0.044 | 0.88 | 1.00 | Aqua Regia Digestion |
| Eu, Europium (ppm) | 0.65 | 0.024 | 0.61 | 0.69 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 3.50 | 0.095 | 3.41 | 3.58 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 8.33 | 0.439 | 8.04 | 8.62 | Aqua Regia Digestion |
| Gd, Gadolinium (ppm) | 2.68 | 0.181 | 2.45 | 2.91 | Aqua Regia Digestion |
| Ge, Germanium (ppm) | 0.086 | 0.024 | 0.064 | 0.108 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | 0.72 | 0.07 | 0.68 | 0.77 | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 0.071 | 0.012 | 0.057 | 0.085 | Aqua Regia Digestion |
| Ho, Holmium (ppm) | 0.35 | 0.04 | 0.30 | 0.40 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.034 | 0.004 | 0.029 | 0.040 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.236 | 0.014 | 0.225 | 0.248 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 12.9 | 0.61 | 12.4 | 13.4 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 23.7 | 1.34 | 22.8 | 24.6 | Aqua Regia Digestion |
| Lu, Lutetium (ppm) | 0.13 | 0.007 | 0.12 | 0.14 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 1.22 | 0.045 | 1.19 | 1.25 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.083 | 0.004 | 0.081 | 0.085 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 3.50 | 0.245 | 3.38 | 3.63 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.155 | 0.013 | 0.146 | 0.165 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.11 | 0.04 | 0.08 | 0.14 | Aqua Regia Digestion |
| Nd, Neodymium (ppm) | 13.9 | 0.57 | 13.1 | 14.7 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 12.3 | 0.63 | 11.8 | 12.8 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.078 | 0.004 | 0.076 | 0.080 | Aqua Regia Digestion |
| Pb, Lead (ppm) | 23.8 | 1.73 | 22.8 | 24.8 | Aqua Regia Digestion |
| Pr, Praseodymium (ppm) | 3.55 | 0.325 | 3.17 | 3.93 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 10.8 | 1.2 | 10.0 | 11.5 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | 0.001 | 0.000 | 0.000 | 0.002 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 0.578 | 0.029 | 0.562 | 0.595 | Aqua Regia Digestion |
| Sb, Antimony (ppm) | 191 | 25 | 178 | 205 | Aqua Regia Digestion |
| Sc, Scandium (ppm) | 10.1 | 1.01 | 9.5 | 10.8 | Aqua Regia Digestion |
| Se, Selenium (ppm) | 0.58 | 0.13 | 0.38 | 0.77 | Aqua Regia Digestion |
| Sm, Samarium (ppm) | 2.93 | 0.272 | 2.53 | 3.34 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 0.70 | 0.053 | 0.63 | 0.77 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 132 | 9 | 128 | 137 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Tb, Terbium (ppm) | 0.38 | 0.05 | 0.33 | 0.42 | Aqua Regia Digestion |
| Te, Tellurium (ppm) | 1.05 | 0.080 | 0.97 | 1.13 | Aqua Regia Digestion |
| Th, Thorium (ppm) | 2.23 | 0.140 | 2.12 | 2.34 | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | 0.131 | 0.014 | 0.123 | 0.139 | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.10 | 0.007 | 0.10 | 0.11 | Aqua Regia Digestion |
| U, Uranium (ppm) | 0.53 | 0.033 | 0.50 | 0.57 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 89 | 5.8 | 86 | 92 | Aqua Regia Digestion |
| W, Tungsten (ppm) | 1.27 | 0.40 | 1.03 | 1.50 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 9.82 | 0.475 | 9.47 | 10.17 | Aqua Regia Digestion |
| Yb, Ytterbium (ppm) | 0.84 | 0.080 | 0.76 | 0.92 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 93 | 3.0 | 90 | 95 | Aqua Regia Digestion |
| Zr, Zirconium (ppm) | 22.7 | 1.80 | 21.5 | 23.9 | Aqua Regia Digestion |
Product Specifications
State
primary
Matrix
andesite
Mineralisation
low sulphidation epithermal
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 32.7 | - | - | - | 4-Acid Digestion |
| Dy - Dysprosium (ppm) | 2.42 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 1.46 | - | - | - | 4-Acid Digestion |
| Eu - Europium (ppm) | 0.86 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 2.99 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.52 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 15.3 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.21 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 16.3 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 4.01 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 3.40 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.42 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 1.44 | - | - | - | 4-Acid Digestion |
| Cu - Copper (ppm) | 84 | - | - | - | Aqua Regia |
| Hg - Mercury (ppm) | 0.071 | - | - | - | Aqua Regia |
| Sb - Antimony (ppm) | 191 | - | - | - | Aqua Regia |
| Se - Selenium (ppm) | 0.58 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 0.70 | - | - | - | Aqua Regia |
| Tl - Thallium (ppm) | 0.10 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 93 | - | - | - | 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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