OREAS 24d
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Description
Description
OREAS 24d was prepared from olivine tholeiitic basalt from the Quaternary Newer Volcanics Province, Victoria, Australia. It is characterised by very low background gold of less than 1 parts per billion. Ten commercial analytical laboratories participated in the program to characterise (in addition to gold by fire assay) Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, Hf, In, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Ni, P, Pb, Rb, S, Sc, Sn, Sr, Ta, Tb, Th, Ti, U, V, W, Y, Zn and Zr by 4-acid digestion with ICP-OES or ICP-MS finish.
|
Analyte
|
Certified Value
|
1SD
|
95% Confidence Limits Low
|
95% Confidence Limits High
|
Method
|
|---|---|---|---|---|---|
| Au, Gold (ppb) | < 1 | IND | IND | IND | Pb Fire Assay |
| Cu, Copper (ppm) | 43.2 | 2.29 | 41.6 | 44.8 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 137 | 7 | 132 | 141 | 4-Acid Digestion |
| Ag, Silver (ppm) | < 0.200 | IND | IND | IND | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 7.77 | 0.212 | 7.61 | 7.93 | 4-Acid Digestion |
| As, Arsenic (ppm) | 1.35 | 0.33 | 1.13 | 1.57 | 4-Acid Digestion |
| Ba, Barium (ppm) | 536 | 16 | 526 | 547 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 2.14 | 0.143 | 2.06 | 2.21 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.030 | 0.007 | 0.025 | 0.034 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 5.62 | 0.251 | 5.44 | 5.80 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.12 | 0.02 | 0.10 | 0.14 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 59 | 1.5 | 58 | 60 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 44.2 | 2.42 | 42.5 | 46.0 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 147 | 21 | 131 | 163 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 1.18 | 0.066 | 1.13 | 1.22 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 7.97 | 0.381 | 7.70 | 8.24 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 22.1 | 0.84 | 21.4 | 22.7 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 4.70 | 0.325 | 4.44 | 4.97 | 4-Acid Digestion |
| In, Indium (ppm) | 0.074 | 0.011 | 0.071 | 0.076 | 4-Acid Digestion |
| K, Potassium (wt.%) | 1.69 | 0.059 | 1.65 | 1.73 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 29.1 | 2.01 | 27.7 | 30.5 | 4-Acid Digestion |
| Li, Lithium (ppm) | 10.8 | 0.65 | 10.2 | 11.3 | 4-Acid Digestion |
| Lu, Lutetium (ppm) | 0.23 | 0.03 | 0.20 | 0.26 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 4.56 | 0.157 | 4.45 | 4.67 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.115 | 0.005 | 0.112 | 0.119 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 4.46 | 0.350 | 4.15 | 4.78 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 2.33 | 0.109 | 2.25 | 2.41 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 44.6 | 4.14 | 41.0 | 48.2 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.252 | 0.016 | 0.241 | 0.264 | 4-Acid Digestion |
| Pb, Lead (ppm) | 3.56 | 0.44 | 3.24 | 3.87 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 37.2 | 4.2 | 34.4 | 40.1 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.042 | 0.004 | 0.038 | 0.046 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 20.0 | 1.11 | 19.2 | 20.7 | 4-Acid Digestion |
| Sn, Tin (ppm) | 1.89 | 0.088 | 1.82 | 1.95 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 748 | 37 | 722 | 775 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 3.01 | 0.240 | 2.80 | 3.22 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 0.79 | 0.044 | 0.75 | 0.83 | 4-Acid Digestion |
| Th, Thorium (ppm) | 3.78 | 0.326 | 3.53 | 4.03 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 1.22 | 0.053 | 1.17 | 1.26 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.12 | 0.02 | 0.11 | 0.14 | 4-Acid Digestion |
| U, Uranium (ppm) | 1.40 | 0.089 | 1.34 | 1.46 | 4-Acid Digestion |
| V, Vanadium (ppm) | 201 | 7 | 197 | 206 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 20.4 | 0.90 | 19.8 | 21.1 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 104 | 7 | 99 | 109 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 205 | 6 | 201 | 209 | 4-Acid Digestion |
