OREAS 249
primary
metasediments
orogenic lode gold
OREAS 249
SKU: 249
OREAS 249 was prepared from a blend of high-grade gold-antimony ore, barren
metasediments and Sb-Au concentrate. The ore and concentrate were sourced from
the Costerfield Operation (Mandalay Resources Ltd), located ~10 km northeast of
Heathcote, Victoria. The deposit is hosted in Lower Silurian metasedimentary
rocks and is characterised by narrow, high-grade quartz-stibnite veins. Gold
occurs with arsenopyrite and pyrite, as well as in “gold-only” quartz-carbonate
veins at depth or beneath stibnite lodes.
Forty commercial analytical laboratories participated in the program to
certify the elements reported below using the following methods:
Gold by fire assay with AAS, ICP-OES or ICP-MS finish
Gold by PhotonAssay™ with a recommended gross fill mass of 390-420 g
Gold by 15-50g aqua regia digestion with ICP-MS and AAS finish
Antimony by peroxide fusion with ICP-OES and/or ICP-MS finish
Antimony by borate fusion with XRF 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: metasediments
- Mineralisation: orogenic lode gold
- CRM Group: Au >1 ppm, Au-Sb ore
Certified Values
| Analyte | Certified Value | 1SD | 95% CL Low | 95% CL High | Method |
|---|---|---|---|---|---|
| Au, Gold (ppm) | 22.15 | 0.814 | 21.84 | 22.46 | Pb Fire Assay |
| Au, Gold (ppm) | 22.71 | 1.090 | 22.17 | 23.25 | Bi Fire Assay |
| Au, Gold (ppm) | 23.33 | 0.489 | 23.12 | 23.55 | PhotonAssay |
| Au, Gold (ppm) | 20.27 | 0.680 | 19.92 | 20.63 | Aqua Regia Digestion (sample weights 10-50g) |
| Sb, Antimony (wt.%) | 8.15 | 0.414 | 7.78 | 8.52 | Peroxide Fusion ICP |
| Sb, Antimony (wt.%) | 8.38 | 0.149 | 8.22 | 8.54 | Borate Fusion XRF |
| Ag, Silver (ppm) | 2.22 | 0.117 | 2.08 | 2.36 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 5.84 | 0.203 | 5.63 | 6.05 | 4-Acid Digestion |
| As, Arsenic (wt.%) | 0.182 | 0.010 | 0.173 | 0.191 | 4-Acid Digestion |
| Ba, Barium (ppm) | 446 | 46 | 411 | 481 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 2.29 | 0.062 | 2.22 | 2.37 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 3.58 | 0.40 | 3.32 | 3.84 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.579 | 0.019 | 0.560 | 0.597 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.31 | 0.04 | 0.27 | 0.35 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 69 | 4.5 | 65 | 73 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 21.6 | 2.6 | 19.5 | 23.6 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 196 | 7 | 188 | 203 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 11.7 | 0.43 | 11.1 | 12.2 | 4-Acid Digestion |
| Cu, Copper (ppm) | 257 | 15 | 245 | 268 | 4-Acid Digestion |
| Er, Erbium (ppm) | 1.59 | 0.26 | 1.21 | 1.97 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 3.90 | 0.114 | 3.77 | 4.03 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 15.0 | 1.37 | 13.9 | 16.0 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 3.83 | 0.38 | 3.20 | 4.45 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 2.86 | 0.143 | 2.70 | 3.02 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 0.55 | 0.08 | 0.44 | 0.66 | 4-Acid Digestion |
| In, Indium (ppm) | 0.097 | 0.016 | 0.071 | 0.124 | 4-Acid Digestion |
| K, Potassium (wt.%) | 2.52 | 0.069 | 2.45 | 2.59 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 37.9 | 3.05 | 35.7 | 40.1 | 4-Acid Digestion |
| Li, Lithium (ppm) | 25.0 | 7.4 | 19.9 | 30.1 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.27 | 0.03 | 0.22 | 0.32 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 1.16 | 0.036 | 1.12 | 1.19 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.072 | 0.004 | 0.069 | 0.075 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 15.1 | 3.2 | 13.0 | 17.2 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 0.330 | 0.009 | 0.319 | 0.341 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 9.42 | 1.66 | 8.10 | 10.75 | 4-Acid Digestion |
| Nd, Neodymium (ppm) | 30.3 | 1.21 | 28.2 | 32.4 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 65 | 8 | 59 | 71 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.048 | 0.002 | 0.045 | 0.050 | 4-Acid Digestion |
| Pb, Lead (ppm) | 271 | 28 | 252 | 290 | 4-Acid Digestion |
| Pr, Praseodymium (ppm) | 7.96 | 0.735 | 6.92 | 9.01 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 154 | 7 | 147 | 160 | 4-Acid Digestion |
| Re, Rhenium (ppm) | 0.032 | 0.004 | 0.027 | 0.036 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 4.25 | 0.071 | 4.15 | 4.36 | 4-Acid Digestion |
| Sb, Antimony (wt.%) | 7.03 | 1.54 | 5.27 | 8.79 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 11.1 | 0.35 | 10.4 | 11.8 | 4-Acid Digestion |
| Se, Selenium (ppm) | 13.8 | 1.4 | 12.4 | 15.3 | 4-Acid Digestion |
| Sm, Samarium (ppm) | 5.48 | 0.378 | 4.90 | 6.07 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 130 | 3 | 125 | 135 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.53 | 0.10 | 0.41 | 0.65 | 4-Acid Digestion |
| Th, Thorium (ppm) | 13.9 | 0.97 | 13.1 | 14.7 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.249 | 0.057 | 0.213 | 0.285 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.95 | 0.12 | 0.87 | 1.04 | 4-Acid Digestion |
| U, Uranium (ppm) | 2.43 | 0.164 | 2.30 | 2.56 | 4-Acid Digestion |
| V, Vanadium (ppm) | 67 | 5.6 | 63 | 72 | 4-Acid Digestion |
| W, Tungsten (ppm) | 5.06 | 1.21 | 3.90 | 6.23 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 15.8 | 2.4 | 14.2 | 17.4 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 1.66 | 0.160 | 1.42 | 1.91 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 250 | 27 | 232 | 267 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 98 | 4.4 | 94 | 103 | 4-Acid Digestion |
| Ag, Silver (ppm) | 2.17 | 0.049 | 2.09 | 2.25 | Aqua Regia Digestion |
| Al, Aluminium (wt.%) | 1.03 | 0.082 | 0.95 | 1.11 | Aqua Regia Digestion |
| Ba, Barium (ppm) | 94 | 25 | 77 | 112 | Aqua Regia Digestion |
| Be, Beryllium (ppm) | 0.92 | 0.082 | 0.85 | 0.99 | Aqua Regia Digestion |
| Bi, Bismuth (ppm) | 3.73 | 0.315 | 3.44 | 4.01 | Aqua Regia Digestion |
| Ca, Calcium (wt.%) | 0.550 | 0.021 | 0.532 | 0.568 | Aqua Regia Digestion |
| Cd, Cadmium (ppm) | 0.31 | 0.024 | 0.28 | 0.34 | Aqua Regia Digestion |
| Ce, Cerium (ppm) | 26.4 | 3.7 | 23.3 | 29.5 | Aqua Regia Digestion |
| Co, Cobalt (ppm) | 24.2 | 1.11 | 23.0 | 25.5 | Aqua Regia Digestion |
| Cr, Chromium (ppm) | 86 | 7.7 | 80 | 91 | Aqua Regia Digestion |
| Cs, Caesium (ppm) | 4.13 | 0.50 | 3.74 | 4.52 | Aqua Regia Digestion |
| Cu, Copper (ppm) | 266 | 7 | 259 | 273 | Aqua Regia Digestion |
| Fe, Iron (wt.%) | 3.55 | 0.103 | 3.46 | 3.64 | Aqua Regia Digestion |
| Ga, Gallium (ppm) | 3.21 | 0.320 | 2.92 | 3.51 | Aqua Regia Digestion |
| Hf, Hafnium (ppm) | < 0.020 | IND | IND | IND | Aqua Regia Digestion |
| Hg, Mercury (ppm) | 0.35 | 0.026 | 0.31 | 0.40 | Aqua Regia Digestion |
| In, Indium (ppm) | 0.074 | 0.005 | 0.065 | 0.084 | Aqua Regia Digestion |
| K, Potassium (wt.%) | 0.480 | 0.023 | 0.459 | 0.502 | Aqua Regia Digestion |
| La, Lanthanum (ppm) | 15.4 | 1.50 | 13.8 | 16.9 | Aqua Regia Digestion |
| Li, Lithium (ppm) | 11.8 | 1.2 | 10.9 | 12.7 | Aqua Regia Digestion |
| Mg, Magnesium (wt.%) | 0.870 | 0.013 | 0.851 | 0.889 | Aqua Regia Digestion |
| Mn, Manganese (wt.%) | 0.073 | 0.003 | 0.070 | 0.076 | Aqua Regia Digestion |
| Mo, Molybdenum (ppm) | 13.5 | 3.1 | 11.3 | 15.6 | Aqua Regia Digestion |
| Na, Sodium (wt.%) | 0.033 | 0.004 | 0.029 | 0.036 | Aqua Regia Digestion |
| Nb, Niobium (ppm) | 0.047 | 0.031 | 0.023 | 0.070 | Aqua Regia Digestion |
| Ni, Nickel (ppm) | 71 | 2.6 | 68 | 75 | Aqua Regia Digestion |
| P, Phosphorus (wt.%) | 0.034 | 0.007 | 0.029 | 0.039 | Aqua Regia Digestion |
| Rb, Rubidium (ppm) | 28.1 | 1.97 | 26.3 | 30.0 | Aqua Regia Digestion |
| Re, Rhenium (ppm) | 0.034 | 0.002 | 0.031 | 0.036 | Aqua Regia Digestion |
| S, Sulphur (wt.%) | 4.22 | 0.108 | 4.12 | 4.32 | Aqua Regia Digestion |
| Sb, Antimony (wt.%) | 7.63 | 0.469 | 6.92 | 8.35 | Aqua Regia Digestion |
| Sn, Tin (ppm) | 5.11 | 0.181 | 4.88 | 5.33 | Aqua Regia Digestion |
| Sr, Strontium (ppm) | 88 | 5.8 | 84 | 92 | Aqua Regia Digestion |
| Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
| Ti, Titanium (wt.%) | < 0.005 | IND | IND | IND | Aqua Regia Digestion |
| Tl, Thallium (ppm) | 0.45 | 0.032 | 0.42 | 0.48 | Aqua Regia Digestion |
| U, Uranium (ppm) | 0.75 | 0.21 | 0.59 | 0.90 | Aqua Regia Digestion |
| V, Vanadium (ppm) | 16.1 | 1.38 | 14.8 | 17.4 | Aqua Regia Digestion |
| Y, Yttrium (ppm) | 6.06 | 0.451 | 5.64 | 6.48 | Aqua Regia Digestion |
| Zn, Zinc (ppm) | 266 | 7 | 258 | 274 | Aqua Regia Digestion |
Product Specifications
State
primary
Matrix
metasediments
Mineralisation
orogenic lode gold
Availability
available
Certified Reference Values
| Analyte | Certified Value | Uncertainty (1SD) | 95% Confidence Low | 95% Confidence High | Method |
|---|---|---|---|---|---|
| Ce - Cerium (ppm) | 69 | - | - | - | 4-Acid Digestion |
| Er - Erbium (ppm) | 1.59 | - | - | - | 4-Acid Digestion |
| Gd - Gadolinium (ppm) | 3.83 | - | - | - | 4-Acid Digestion |
| Ho - Holmium (ppm) | 0.55 | - | - | - | 4-Acid Digestion |
| La - Lanthanum (ppm) | 37.9 | - | - | - | 4-Acid Digestion |
| Lu - Lutetium (ppm) | 0.27 | - | - | - | 4-Acid Digestion |
| Nd - Neodymium (ppm) | 30.3 | - | - | - | 4-Acid Digestion |
| Pr - Praseodymium (ppm) | 7.96 | - | - | - | 4-Acid Digestion |
| Sm - Samarium (ppm) | 5.48 | - | - | - | 4-Acid Digestion |
| Tb - Terbium (ppm) | 0.53 | - | - | - | 4-Acid Digestion |
| Y - Yttrium (ppm) | 15.8 | - | - | - | 4-Acid Digestion |
| Yb - Ytterbium (ppm) | 1.66 | - | - | - | 4-Acid Digestion |
| Ag - Silver (ppm) | 2.17 | - | - | - | Aqua Regia |
| Bi - Bismuth (ppm) | 3.73 | - | - | - | Aqua Regia |
| Cd - Cadmium (ppm) | 0.31 | - | - | - | Aqua Regia |
| Co - Cobalt (ppm) | 24.2 | - | - | - | Aqua Regia |
| Cu - Copper (ppm) | 266 | - | - | - | Aqua Regia |
| Hg - Mercury (ppm) | 0.35 | - | - | - | Aqua Regia |
| Mo - Molybdenum (ppm) | 13.5 | - | - | - | Aqua Regia |
| Ni - Nickel (ppm) | 71 | - | - | - | Aqua Regia |
| Sn - Tin (ppm) | 5.11 | - | - | - | Aqua Regia |
| Tl - Thallium (ppm) | 0.45 | - | - | - | Aqua Regia |
| Zn - Zinc (ppm) | 266 | - | - | - | 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