Description
Description
OREAS 25b was prepared from a blend of in situ layers of mature soils developed over early tertiary tholeiitic basalt in outer eastern Melbourne, Victoria, Australia and colluvium sourced from the Ettamogah region of NSW, Australia. Fifteen laboratories participated in the program to characterise the elements reported below. The following methods were employed:
- Au, Pt and Pd by low level fire assay with ICP-OES, MS or AAS finish
- Lithium borate fusion for full suite X-ray fluorescence including LOI at 1000 degrees
- Sodium peroxide fusion or lithium borate fusion for full suite ICP-OES and ICP-MS
- 4-acid (HF-HNO3-HClO4-HCl) digestion for full ICP-OES and ICP-MS elemental suites
- Aqua regia digestion for full ICP-OES and ICP-MS elemental suites
- Infrared combustion furnace for Total C and S
Analyte
|
Certified Value
|
1SD
|
Expanded Uncertainty Low
|
Expanded Uncertainty High
|
Method
|
---|---|---|---|---|---|
Au, Gold (ppb) | 1.6 | 0.86 | 0.6 | 2.6 | Pb Fire Assay |
Pd, Palladium (ppb) | 1.42 | 0.33 | 1.15 | 1.69 | Pb Fire Assay |
Pt, Platinum (ppb) | < 5.00 | IND | IND | IND | Pb Fire Assay |
Al2O3, Aluminium(III) oxide (wt.%) | 16.85 | 0.299 | 16.65 | 17.05 | Borate Fusion XRF |
BaO, Barium oxide (ppm) | 214 | 28 | 138 | 290 | Borate Fusion XRF |
CaO, Calcium oxide (wt.%) | 0.356 | 0.012 | 0.344 | 0.368 | Borate Fusion XRF |
Cr2O3, Chromium(III) oxide (ppm) | 296 | 45 | 272 | 320 | Borate Fusion XRF |
Fe2O3, Iron(III) oxide (wt.%) | 12.20 | 0.172 | 12.07 | 12.34 | Borate Fusion XRF |
K2O, Potassium oxide (wt.%) | 0.936 | 0.019 | 0.921 | 0.950 | Borate Fusion XRF |
MgO, Magnesium oxide (wt.%) | 0.627 | 0.014 | 0.608 | 0.646 | Borate Fusion XRF |
MnO, Manganese oxide (wt.%) | 0.030 | 0.004 | 0.029 | 0.032 | Borate Fusion XRF |
Na2O, Sodium oxide (wt.%) | 0.094 | 0.013 | 0.080 | 0.107 | Borate Fusion XRF |
P2O5, Phosphorus(V) oxide (wt.%) | 0.100 | 0.004 | 0.094 | 0.107 | Borate Fusion XRF |
SiO2, Silicon dioxide (wt.%) | 58.09 | 0.300 | 57.75 | 58.43 | Borate Fusion XRF |
SO3, Sulphur trioxide (wt.%) | 0.058 | 0.008 | 0.049 | 0.068 | Borate Fusion XRF |
SrO, Strontium oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
TiO2, Titanium dioxide (wt.%) | 1.88 | 0.020 | 1.86 | 1.90 | Borate Fusion XRF |
LOI1000, Loss On Ignition @1000 °C (wt.%) | 8.49 | 0.195 | 8.32 | 8.67 | Thermogravimetry |
Al, Aluminium (wt.%) | 8.73 | 0.226 | 8.44 | 9.02 | Borate / Peroxide Fusion ICP |
Ba, Barium (ppm) | 210 | 8 | 201 | 220 | Borate / Peroxide Fusion ICP |
Be, Beryllium (ppm) | 1.52 | 0.52 | 1.13 | 1.91 | Borate / Peroxide Fusion ICP |
Ca, Calcium (wt.%) | 0.290 | 0.045 | 0.263 | 0.318 | Borate / Peroxide Fusion ICP |
Ce, Cerium (ppm) | 53 | 2.3 | 51 | 55 | Borate / Peroxide Fusion ICP |
Co, Cobalt (ppm) | 9.91 | 0.874 | 8.76 | 11.07 | Borate / Peroxide Fusion ICP |
Cr, Chromium (ppm) | 219 | 12 | 208 | 230 | Borate / Peroxide Fusion ICP |
Cs, Caesium (ppm) | 4.57 | 0.172 | 4.33 | 4.80 | Borate / Peroxide Fusion ICP |
Cu, Copper (ppm) | 41.2 | 9.0 | 32.1 | 50.3 | Borate / Peroxide Fusion ICP |
Dy, Dysprosium (ppm) | 3.61 | 0.204 | 3.34 | 3.89 | Borate / Peroxide Fusion ICP |
Er, Erbium (ppm) | 2.16 | 0.144 | 1.91 | 2.41 | Borate / Peroxide Fusion ICP |
Eu, Europium (ppm) | 0.89 | 0.071 | 0.79 | 0.99 | Borate / Peroxide Fusion ICP |
Fe, Iron (wt.%) | 8.44 | 0.268 | 8.14 | 8.74 | Borate / Peroxide Fusion ICP |
Ga, Gallium (ppm) | 25.9 | 1.14 | 24.5 | 27.2 | Borate / Peroxide Fusion ICP |
Gd, Gadolinium (ppm) | 3.66 | 0.135 | 3.40 | 3.92 | Borate / Peroxide Fusion ICP |
Ge, Germanium (ppm) | 2.03 | 0.44 | 1.42 | 2.64 | Borate / Peroxide Fusion ICP |
Hf, Hafnium (ppm) | 8.47 | 0.398 | 7.99 | 8.94 | Borate / Peroxide Fusion ICP |
Ho, Holmium (ppm) | 0.72 | 0.038 | 0.65 | 0.79 | Borate / Peroxide Fusion ICP |
K, Potassium (wt.%) | 0.805 | 0.058 | 0.745 | 0.865 | Borate / Peroxide Fusion ICP |
La, Lanthanum (ppm) | 27.9 | 1.07 | 26.8 | 29.0 | Borate / Peroxide Fusion ICP |
Li, Lithium (ppm) | 30.2 | 4.5 | 25.0 | 35.4 | Borate / Peroxide Fusion ICP |
Lu, Lutetium (ppm) | 0.32 | 0.029 | 0.27 | 0.36 | Borate / Peroxide Fusion ICP |
Mg, Magnesium (wt.%) | 0.377 | 0.007 | 0.368 | 0.387 | Borate / Peroxide Fusion ICP |
Mn, Manganese (wt.%) | 0.024 | 0.001 | 0.023 | 0.025 | Borate / Peroxide Fusion ICP |
Na, Sodium (wt.%) | 0.066 | 0.016 | 0.056 | 0.075 | Borate / Peroxide Fusion ICP |
Nb, Niobium (ppm) | 27.6 | 1.73 | 26.1 | 29.1 | Borate / Peroxide Fusion ICP |
Nd, Neodymium (ppm) | 22.5 | 1.50 | 20.8 | 24.1 | Borate / Peroxide Fusion ICP |
Ni, Nickel (ppm) | 69 | 7 | 56 | 82 | Borate / Peroxide Fusion ICP |
P, Phosphorus (wt.%) | 0.040 | 0.003 | 0.037 | 0.044 | Borate / Peroxide Fusion ICP |
Pr, Praseodymium (ppm) | 6.04 | 0.386 | 5.69 | 6.38 | Borate / Peroxide Fusion ICP |
Rb, Rubidium (ppm) | 61 | 3.1 | 58 | 64 | Borate / Peroxide Fusion ICP |
Sc, Scandium (ppm) | 16.2 | 1.7 | 14.3 | 18.0 | Borate / Peroxide Fusion ICP |
Si, Silicon (wt.%) | 26.17 | 0.650 | 25.40 | 26.93 | Borate / Peroxide Fusion ICP |
Sm, Samarium (ppm) | 4.19 | 0.358 | 3.81 | 4.57 | Borate / Peroxide Fusion ICP |
Sn, Tin (ppm) | 7.13 | 0.472 | 6.37 | 7.90 | Borate / Peroxide Fusion ICP |
Sr, Strontium (ppm) | 33.6 | 2.19 | 31.0 | 36.2 | Borate / Peroxide Fusion ICP |
Ta, Tantalum (ppm) | 1.93 | 0.149 | 1.80 | 2.07 | Borate / Peroxide Fusion ICP |
Tb, Terbium (ppm) | 0.60 | 0.026 | 0.55 | 0.64 | Borate / Peroxide Fusion ICP |
Th, Thorium (ppm) | 13.2 | 0.60 | 12.6 | 13.8 | Borate / Peroxide Fusion ICP |
Ti, Titanium (wt.%) | 1.11 | 0.040 | 1.07 | 1.14 | Borate / Peroxide Fusion ICP |
Tl, Thallium (ppm) | < 0.50 | IND | IND | IND | Borate / Peroxide Fusion ICP |
Tm, Thulium (ppm) | 0.32 | 0.029 | 0.28 | 0.36 | Borate / Peroxide Fusion ICP |
U, Uranium (ppm) | 2.73 | 0.165 | 2.57 | 2.88 | Borate / Peroxide Fusion ICP |
V, Vanadium (ppm) | 188 | 6 | 180 | 196 | Borate / Peroxide Fusion ICP |
W, Tungsten (ppm) | 2.90 | 0.58 | 2.26 | 3.54 | Borate / Peroxide Fusion ICP |
Y, Yttrium (ppm) | 20.6 | 1.03 | 18.9 | 22.3 | Borate / Peroxide Fusion ICP |
Yb, Ytterbium (ppm) | 2.16 | 0.153 | 1.94 | 2.39 | Borate / Peroxide Fusion ICP |
Zn, Zinc (ppm) | 65 | 7 | 54 | 77 | Borate / Peroxide Fusion ICP |
Zr, Zirconium (ppm) | 322 | 11 | 306 | 338 | Borate / Peroxide Fusion ICP |
Al, Aluminium (wt.%) | 8.60 | 0.256 | 8.36 | 8.83 | 4-Acid Digestion |
As, Arsenic (ppm) | 14.5 | 1.03 | 13.4 | 15.6 | 4-Acid Digestion |
Ba, Barium (ppm) | 211 | 8 | 204 | 219 | 4-Acid Digestion |
Be, Beryllium (ppm) | 1.30 | 0.080 | 1.17 | 1.42 | 4-Acid Digestion |
Bi, Bismuth (ppm) | 0.40 | 0.026 | 0.37 | 0.43 | 4-Acid Digestion |
Ca, Calcium (wt.%) | 0.255 | 0.019 | 0.245 | 0.265 | 4-Acid Digestion |
Cd, Cadmium (ppm) | 0.044 | 0.015 | 0.025 | 0.064 | 4-Acid Digestion |
Ce, Cerium (ppm) | 53 | 6 | 50 | 57 | 4-Acid Digestion |
Co, Cobalt (ppm) | 9.29 | 0.426 | 8.89 | 9.69 | 4-Acid Digestion |
Cr, Chromium (ppm) | 204 | 10 | 194 | 214 | 4-Acid Digestion |
Cs, Caesium (ppm) | 4.61 | 0.300 | 4.41 | 4.82 | 4-Acid Digestion |
Cu, Copper (ppm) | 38.3 | 3.75 | 36.0 | 40.7 | 4-Acid Digestion |
Dy, Dysprosium (ppm) | 2.47 | 0.29 | 2.17 | 2.77 | 4-Acid Digestion |
Er, Erbium (ppm) | 1.29 | 0.19 | 1.06 | 1.53 | 4-Acid Digestion |
Eu, Europium (ppm) | 0.83 | 0.073 | 0.74 | 0.93 | 4-Acid Digestion |
Fe, Iron (wt.%) | 8.19 | 0.318 | 7.96 | 8.42 | 4-Acid Digestion |
Ga, Gallium (ppm) | 25.3 | 1.11 | 24.4 | 26.1 | 4-Acid Digestion |
Gd, Gadolinium (ppm) | 3.16 | 0.278 | 2.87 | 3.45 | 4-Acid Digestion |
Hf, Hafnium (ppm) | 4.68 | 0.204 | 4.45 | 4.91 | 4-Acid Digestion |
Ho, Holmium (ppm) | 0.46 | 0.08 | 0.34 | 0.58 | 4-Acid Digestion |
In, Indium (ppm) | 0.095 | 0.005 | 0.087 | 0.103 | 4-Acid Digestion |
K, Potassium (wt.%) | 0.762 | 0.018 | 0.743 | 0.781 | 4-Acid Digestion |
La, Lanthanum (ppm) | 28.3 | 2.56 | 26.7 | 29.9 | 4-Acid Digestion |
Li, Lithium (ppm) | 29.5 | 1.27 | 28.7 | 30.4 | 4-Acid Digestion |
Lu, Lutetium (ppm) | 0.18 | 0.03 | 0.13 | 0.22 | 4-Acid Digestion |
Mg, Magnesium (wt.%) | 0.355 | 0.013 | 0.344 | 0.365 | 4-Acid Digestion |
Mn, Manganese (wt.%) | 0.024 | 0.001 | 0.023 | 0.025 | 4-Acid Digestion |
Mo, Molybdenum (ppm) | 2.12 | 0.132 | 1.96 | 2.27 | 4-Acid Digestion |
Na, Sodium (wt.%) | 0.071 | 0.003 | 0.069 | 0.073 | 4-Acid Digestion |
Nb, Niobium (ppm) | 23.7 | 2.03 | 22.0 | 25.4 | 4-Acid Digestion |
Nd, Neodymium (ppm) | 21.2 | 2.06 | 19.2 | 23.2 | 4-Acid Digestion |
Ni, Nickel (ppm) | 68 | 3.0 | 66 | 70 | 4-Acid Digestion |
P, Phosphorus (wt.%) | 0.041 | 0.002 | 0.040 | 0.043 | 4-Acid Digestion |
Pb, Lead (ppm) | 20.9 | 0.76 | 20.0 | 21.8 | 4-Acid Digestion |
Pr, Praseodymium (ppm) | 5.80 | 0.571 | 5.23 | 6.37 | 4-Acid Digestion |
Rb, Rubidium (ppm) | 63 | 3.6 | 60 | 66 | 4-Acid Digestion |
Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
S, Sulphur (wt.%) | 0.026 | 0.005 | 0.022 | 0.031 | 4-Acid Digestion |
Sb, Antimony (ppm) | 0.98 | 0.056 | 0.91 | 1.05 | 4-Acid Digestion |
Sc, Scandium (ppm) | 15.3 | 0.95 | 14.4 | 16.1 | 4-Acid Digestion |
Sm, Samarium (ppm) | 3.93 | 0.41 | 3.49 | 4.36 | 4-Acid Digestion |
Sn, Tin (ppm) | 5.07 | 0.308 | 4.79 | 5.36 | 4-Acid Digestion |
Sr, Strontium (ppm) | 32.3 | 2.05 | 30.8 | 33.9 | 4-Acid Digestion |
Ta, Tantalum (ppm) | 1.65 | 0.19 | 1.50 | 1.80 | 4-Acid Digestion |
Tb, Terbium (ppm) | 0.43 | 0.039 | 0.35 | 0.50 | 4-Acid Digestion |
Te, Tellurium (ppm) | < 0.050 | IND | IND | IND | 4-Acid Digestion |
Th, Thorium (ppm) | 12.8 | 0.81 | 12.2 | 13.5 | 4-Acid Digestion |
Ti, Titanium (wt.%) | 1.01 | 0.034 | 0.99 | 1.04 | 4-Acid Digestion |
Tl, Thallium (ppm) | 0.40 | 0.030 | 0.37 | 0.42 | 4-Acid Digestion |
Tm, Thulium (ppm) | 0.19 | 0.02 | 0.17 | 0.21 | 4-Acid Digestion |
U, Uranium (ppm) | 2.35 | 0.193 | 2.17 | 2.53 | 4-Acid Digestion |
V, Vanadium (ppm) | 176 | 8 | 170 | 181 | 4-Acid Digestion |
W, Tungsten (ppm) | 2.07 | 0.175 | 1.88 | 2.26 | 4-Acid Digestion |
Y, Yttrium (ppm) | 11.8 | 1.8 | 10.7 | 12.9 | 4-Acid Digestion |
Yb, Ytterbium (ppm) | 1.10 | 0.17 | 0.88 | 1.32 | 4-Acid Digestion |
Zn, Zinc (ppm) | 66 | 1.8 | 63 | 68 | 4-Acid Digestion |
Zr, Zirconium (ppm) | 181 | 10 | 173 | 189 | 4-Acid Digestion |
Ag, Silver (ppm) | 0.047 | 0.015 | 0.031 | 0.063 | Aqua Regia Digestion |
Al, Aluminium (wt.%) | 4.26 | 0.294 | 3.99 | 4.53 | Aqua Regia Digestion |
As, Arsenic (ppm) | 2.16 | 0.49 | 1.63 | 2.68 | Aqua Regia Digestion |
B, Boron (ppm) | < 10.0 | IND | IND | IND | Aqua Regia Digestion |
Ba, Barium (ppm) | 68 | 2.5 | 66 | 70 | Aqua Regia Digestion |
Be, Beryllium (ppm) | 0.76 | 0.045 | 0.71 | 0.81 | Aqua Regia Digestion |
Bi, Bismuth (ppm) | 0.34 | 0.027 | 0.32 | 0.37 | Aqua Regia Digestion |
Ca, Calcium (wt.%) | 0.221 | 0.010 | 0.211 | 0.231 | Aqua Regia Digestion |
Cd, Cadmium (ppm) | 0.043 | 0.011 | 0.031 | 0.055 | Aqua Regia Digestion |
Ce, Cerium (ppm) | 32.6 | 1.63 | 31.3 | 34.0 | Aqua Regia Digestion |
Co, Cobalt (ppm) | 6.40 | 1.15 | 5.70 | 7.11 | Aqua Regia Digestion |
Cr, Chromium (ppm) | 140 | 7 | 136 | 145 | Aqua Regia Digestion |
Cs, Caesium (ppm) | 2.03 | 0.24 | 1.85 | 2.21 | Aqua Regia Digestion |
Cu, Copper (ppm) | 29.1 | 3.0 | 27.0 | 31.2 | Aqua Regia Digestion |
Fe, Iron (wt.%) | 7.61 | 0.218 | 7.42 | 7.79 | Aqua Regia Digestion |
Ga, Gallium (ppm) | 17.9 | 1.00 | 17.2 | 18.6 | Aqua Regia Digestion |
Hf, Hafnium (ppm) | 0.75 | 0.12 | 0.66 | 0.84 | Aqua Regia Digestion |
Hg, Mercury (ppm) | 0.028 | 0.009 | 0.016 | 0.039 | Aqua Regia Digestion |
In, Indium (ppm) | 0.065 | 0.005 | 0.059 | 0.070 | Aqua Regia Digestion |
K, Potassium (wt.%) | 0.125 | 0.006 | 0.119 | 0.132 | Aqua Regia Digestion |
La, Lanthanum (ppm) | 15.7 | 0.73 | 15.0 | 16.4 | Aqua Regia Digestion |
Li, Lithium (ppm) | 14.1 | 2.0 | 12.4 | 15.8 | Aqua Regia Digestion |
Mg, Magnesium (wt.%) | 0.193 | 0.027 | 0.175 | 0.210 | Aqua Regia Digestion |
Mn, Manganese (wt.%) | 0.018 | 0.001 | 0.017 | 0.018 | Aqua Regia Digestion |
Mo, Molybdenum (ppm) | 1.24 | 0.27 | 1.05 | 1.44 | Aqua Regia Digestion |
Na, Sodium (wt.%) | 0.019 | 0.003 | 0.017 | 0.020 | Aqua Regia Digestion |
Nb, Niobium (ppm) | 0.58 | 0.23 | 0.38 | 0.79 | Aqua Regia Digestion |
Ni, Nickel (ppm) | 34.4 | 5.0 | 30.5 | 38.4 | Aqua Regia Digestion |
P, Phosphorus (wt.%) | 0.032 | 0.002 | 0.031 | 0.034 | Aqua Regia Digestion |
Pb, Lead (ppm) | 18.8 | 0.77 | 18.0 | 19.6 | Aqua Regia Digestion |
Rb, Rubidium (ppm) | 15.8 | 1.7 | 14.4 | 17.1 | Aqua Regia Digestion |
Re, Rhenium (ppm) | < 0.001 | IND | IND | IND | Aqua Regia Digestion |
S, Sulphur (wt.%) | 0.022 | 0.004 | 0.020 | 0.024 | Aqua Regia Digestion |
Sb, Antimony (ppm) | 0.42 | 0.10 | 0.34 | 0.50 | Aqua Regia Digestion |
Sc, Scandium (ppm) | 10.0 | 0.50 | 9.6 | 10.4 | Aqua Regia Digestion |
Se, Selenium (ppm) | 0.43 | 0.10 | 0.31 | 0.55 | Aqua Regia Digestion |
Sn, Tin (ppm) | 2.26 | 0.205 | 2.09 | 2.44 | Aqua Regia Digestion |
Sr, Strontium (ppm) | 13.3 | 1.16 | 12.5 | 14.1 | Aqua Regia Digestion |
Ta, Tantalum (ppm) | < 0.010 | IND | IND | IND | Aqua Regia Digestion |
Tb, Terbium (ppm) | 0.24 | 0.03 | 0.20 | 0.28 | Aqua Regia Digestion |
Th, Thorium (ppm) | 9.12 | 0.560 | 8.71 | 9.52 | Aqua Regia Digestion |
Ti, Titanium (wt.%) | 0.105 | 0.012 | 0.095 | 0.115 | Aqua Regia Digestion |
Tl, Thallium (ppm) | 0.13 | 0.011 | 0.12 | 0.14 | Aqua Regia Digestion |
U, Uranium (ppm) | 1.24 | 0.095 | 1.17 | 1.30 | Aqua Regia Digestion |
V, Vanadium (ppm) | 136 | 5 | 132 | 139 | Aqua Regia Digestion |
W, Tungsten (ppm) | < 0.050 | IND | IND | IND | Aqua Regia Digestion |
Y, Yttrium (ppm) | 5.63 | 0.176 | 5.45 | 5.81 | Aqua Regia Digestion |
Yb, Ytterbium (ppm) | 0.44 | 0.04 | 0.39 | 0.48 | Aqua Regia Digestion |
Zn, Zinc (ppm) | 48.4 | 4.21 | 45.1 | 51.8 | Aqua Regia Digestion |
Zr, Zirconium (ppm) | 29.2 | 2.01 | 27.6 | 30.8 | Aqua Regia Digestion |
C, Carbon (wt.%) | 1.14 | 0.027 | 1.12 | 1.17 | Infrared Combustion |
S, Sulphur (wt.%) | 0.022 | 0.007 | 0.014 | 0.029 | Infrared Combustion |