OREAS 23c

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
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Certificate DataPack SDS NRAM (367 KB)
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  • Pack Size
    Price
    Stock Level
  • 10g Sachet
    $2.70
    320,000 +
  • 60g Sachet
    $4.50
    54,000 +
  • 500g Jar
    $37.50
    6,400 +
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