OREAS 23c
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Description
Description
OREAS 23c has been prepared from S-Type granodiorite sourced from the Devonian Bulla Granodiorite Complex located north of Melbourne, Australia. It is characterised by low background gold of less than 10 parts per billion. Ten commercial analytical laboratories participated in the program to certify:
- Gold by low-level fire assay
- Four acid digestion with full ICP-OES and ICP-MS elemental suites
|
Analyte
|
Certified Value
|
1SD
|
Expanded Uncertainty Low
|
Expanded Uncertainty High
|
Method
|
|---|---|---|---|---|---|
| Au, Gold (ppb) | < 10.0 | IND | IND | IND | Pb Fire Assay |
| Ag, Silver (ppm) | 0.091 | 0.011 | 0.073 | 0.109 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 7.92 | 0.221 | 7.56 | 8.27 | 4-Acid Digestion |
| As, Arsenic (ppm) | 18.1 | 0.98 | 17.1 | 19.2 | 4-Acid Digestion |
| Ba, Barium (ppm) | 1064 | 36 | 1013 | 1115 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 2.97 | 0.157 | 2.78 | 3.16 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 0.66 | 0.07 | 0.52 | 0.79 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 2.03 | 0.072 | 1.95 | 2.12 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.17 | 0.012 | 0.15 | 0.19 | 4-Acid Digestion |
| Ce, Cerium (ppm) | 83 | 4.1 | 79 | 86 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 9.77 | 0.344 | 8.97 | 10.57 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 53 | 8 | 45 | 61 | 4-Acid Digestion |
| Cs, Caesium (ppm) | 12.6 | 0.27 | 12.0 | 13.2 | 4-Acid Digestion |
| Cu, Copper (ppm) | 28.0 | 1.54 | 26.0 | 30.0 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 3.22 | 0.086 | 3.13 | 3.32 | 4-Acid Digestion |
| Ga, Gallium (ppm) | 21.2 | 0.81 | 19.9 | 22.4 | 4-Acid Digestion |
| Hf, Hafnium (ppm) | 2.24 | 0.111 | 2.09 | 2.40 | 4-Acid Digestion |
| In, Indium (ppm) | 0.066 | 0.005 | 0.055 | 0.076 | 4-Acid Digestion |
| K, Potassium (wt.%) | 3.04 | 0.075 | 2.96 | 3.12 | 4-Acid Digestion |
| La, Lanthanum (ppm) | 38.7 | 1.92 | 35.4 | 42.1 | 4-Acid Digestion |
| Li, Lithium (ppm) | 51 | 2.0 | 48 | 54 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.921 | 0.036 | 0.890 | 0.952 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.042 | 0.001 | 0.040 | 0.043 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 3.20 | 0.299 | 2.89 | 3.51 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 2.09 | 0.089 | 1.99 | 2.19 | 4-Acid Digestion |
| Nb, Niobium (ppm) | 15.6 | 0.77 | 14.8 | 16.5 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 23.8 | 0.85 | 22.4 | 25.2 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 0.091 | 0.002 | 0.088 | 0.094 | 4-Acid Digestion |
| Pb, Lead (ppm) | 23.4 | 1.43 | 21.4 | 25.4 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 185 | 7 | 178 | 192 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.117 | 0.009 | 0.108 | 0.126 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 0.34 | 0.022 | 0.30 | 0.38 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 9.85 | 0.220 | 9.70 | 10.01 | 4-Acid Digestion |
| Sn, Tin (ppm) | 4.85 | 0.254 | 4.49 | 5.20 | 4-Acid Digestion |
| Sr, Strontium (ppm) | 202 | 4 | 192 | 211 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 1.30 | 0.079 | 1.20 | 1.40 | 4-Acid Digestion |
| Th, Thorium (ppm) | 16.4 | 1.44 | 15.0 | 17.8 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 0.419 | 0.008 | 0.411 | 0.426 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 1.02 | 0.047 | 0.96 | 1.07 | 4-Acid Digestion |
| U, Uranium (ppm) | 4.60 | 0.377 | 3.98 | 5.21 | 4-Acid Digestion |
| V, Vanadium (ppm) | 75 | 2.5 | 71 | 80 | 4-Acid Digestion |
| W, Tungsten (ppm) | 10.3 | 0.82 | 8.7 | 11.9 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 18.8 | 0.71 | 18.3 | 19.3 | 4-Acid Digestion |
| Zn, Zinc (ppm) | 80 | 2.7 | 76 | 84 | 4-Acid Digestion |
| Zr, Zirconium (ppm) | 71 | 4.5 | 66 | 76 | 4-Acid Digestion |
