OREAS 509

OREAS 509 was prepared from a blend of porphyry copper-gold ores, barren granodiorite and minor quantities of Cu-Au and Cu-Mo concentrates. The ores were sourced from the Northparkes Mine located in the Central West of New South Wales, Australia. The barren granodiorite was sourced from the mafic, S-Type, Late Devonian Bulla Granodiorite complex located in northern Melbourne, Australia. The Northparkes Mine hosts Cu-Au mineralisation in vertically extensive porphyry pipes with quartz-sulphide veins, breccia fillings, and disseminated sulphides. Bornite and chalcopyrite dominate, with gold as fine inclusions. Potassic alteration zones typically host the highest ore grades. Thirty-one commercial analytical laboratories participated in the program to certify the elements reported below.

  • Au by fire assay with ICP-OES finish
  • Au by aqua regia digestion with ICP-MS finish
  • Full elemental suite by 4-acid digestion with ICP-OES/MS finish, over range Cu by ore-grade digestion
  • Full elemental suite by aqua regia digestion with ICP-OES/MS finish, over range Cu by ore-grade digestion
Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Cu, Copper (wt.%) 1.13 0.024 1.11 1.15 4-Acid Digestion
Mo, Molybdenum (ppm) 506 20 488 523 4-Acid Digestion
Au, Gold (ppm) 1.40 0.046 1.38 1.42 Pb Fire Assay
Au, Gold (ppm) 1.37 0.078 1.34 1.41 Aqua Regia Digestion (sample weights 10-50g)
Ag, Silver (ppm) 2.41 0.151 2.27 2.55 4-Acid Digestion
Al, Aluminium (wt.%) 7.33 0.239 7.13 7.53 4-Acid Digestion
As, Arsenic (ppm) 59 3.2 56 63 4-Acid Digestion
Ba, Barium (ppm) 918 43 879 956 4-Acid Digestion
Be, Beryllium (ppm) 2.28 0.168 2.13 2.43 4-Acid Digestion
Bi, Bismuth (ppm) 3.33 0.241 3.09 3.57 4-Acid Digestion
Ca, Calcium (wt.%) 1.67 0.060 1.61 1.74 4-Acid Digestion
Cd, Cadmium (ppm) 1.25 0.14 1.12 1.37 4-Acid Digestion
Ce, Cerium (ppm) 68 4.2 64 71 4-Acid Digestion
Co, Cobalt (ppm) 19.4 0.88 18.5 20.4 4-Acid Digestion
Cr, Chromium (ppm) 44.3 3.42 41.7 46.8 4-Acid Digestion
Cs, Caesium (ppm) 9.23 0.308 8.90 9.57 4-Acid Digestion
Dy, Dysprosium (ppm) 3.50 0.233 3.24 3.76 4-Acid Digestion
Er, Erbium (ppm) 1.39 0.080 1.25 1.52 4-Acid Digestion
Eu, Europium (ppm) 1.32 0.091 1.21 1.43 4-Acid Digestion
Fe, Iron (wt.%) 4.07 0.124 3.91 4.23 4-Acid Digestion
Ga, Gallium (ppm) 18.9 0.82 18.1 19.6 4-Acid Digestion
Gd, Gadolinium (ppm) 5.29 0.228 4.96 5.62 4-Acid Digestion
Ge, Germanium (ppm) 0.17 0.04 0.13 0.20 4-Acid Digestion
Hf, Hafnium (ppm) 2.10 0.160 1.95 2.26 4-Acid Digestion
Ho, Holmium (ppm) 0.54 0.045 0.49 0.60 4-Acid Digestion
In, Indium (ppm) 0.74 0.028 0.70 0.78 4-Acid Digestion
K, Potassium (wt.%) 3.14 0.086 3.06 3.23 4-Acid Digestion
La, Lanthanum (ppm) 32.8 2.72 30.8 34.9 4-Acid Digestion
Li, Lithium (ppm) 44.2 1.72 42.5 45.9 4-Acid Digestion
Lu, Lutetium (ppm) 0.17 0.02 0.15 0.18 4-Acid Digestion
Mg, Magnesium (wt.%) 0.751 0.025 0.723 0.780 4-Acid Digestion
Mn, Manganese (wt.%) 0.037 0.002 0.036 0.039 4-Acid Digestion
Na, Sodium (wt.%) 2.03 0.072 1.96 2.10 4-Acid Digestion
Nb, Niobium (ppm) 11.6 0.62 11.0 12.1 4-Acid Digestion
Nd, Neodymium (ppm) 30.3 2.06 28.2 32.4 4-Acid Digestion
Ni, Nickel (ppm) 17.2 0.90 16.3 18.2 4-Acid Digestion
P, Phosphorus (wt.%) 0.085 0.004 0.081 0.088 4-Acid Digestion
Pb, Lead (ppm) 100 3.7 95 104 4-Acid Digestion
Pr, Praseodymium (ppm) 8.07 0.91 7.32 8.82 4-Acid Digestion
Rb, Rubidium (ppm) 151 6 144 159 4-Acid Digestion
Re, Rhenium (ppm) 0.11 0.006 0.10 0.12 4-Acid Digestion
S, Sulphur (wt.%) 1.66 0.051 1.62 1.71 4-Acid Digestion
Sb, Antimony (ppm) 2.55 0.167 2.38 2.72 4-Acid Digestion
Sc, Scandium (ppm) 8.11 0.501 7.70 8.53 4-Acid Digestion
Se, Selenium (ppm) 13.1 1.23 12.0 14.2 4-Acid Digestion
Sm, Samarium (ppm) 6.22 0.369 5.84 6.60 4-Acid Digestion
Sn, Tin (ppm) 4.41 0.173 4.18 4.64 4-Acid Digestion
Sr, Strontium (ppm) 247 10 238 256 4-Acid Digestion
Ta, Tantalum (ppm) 1.03 0.14 0.95 1.12 4-Acid Digestion
Tb, Terbium (ppm) 0.70 0.063 0.64 0.76 4-Acid Digestion
Te, Tellurium (ppm) 1.78 0.127 1.62 1.95 4-Acid Digestion
Th, Thorium (ppm) 12.3 1.11 11.5 13.1 4-Acid Digestion
Ti, Titanium (wt.%) 0.334 0.013 0.320 0.347 4-Acid Digestion
Tl, Thallium (ppm) 1.00 0.063 0.94 1.05 4-Acid Digestion
Tm, Thulium (ppm) 0.19 0.010 0.18 0.20 4-Acid Digestion
U, Uranium (ppm) 3.45 0.307 2.95 3.95 4-Acid Digestion
V, Vanadium (ppm) 67 3.2 64 70 4-Acid Digestion
W, Tungsten (ppm) 10.1 0.99 8.9 11.2 4-Acid Digestion
Y, Yttrium (ppm) 14.5 1.16 13.6 15.4 4-Acid Digestion
Yb, Ytterbium (ppm) 1.19 0.111 1.07 1.31 4-Acid Digestion
Zn, Zinc (ppm) 416 15 402 430 4-Acid Digestion
Zr, Zirconium (ppm) 66 3.7 62 70 4-Acid Digestion
Ag, Silver (ppm) 2.37 0.115 2.28 2.47 Aqua Regia Digestion
Al, Aluminium (wt.%) 1.77 0.094 1.71 1.83 Aqua Regia Digestion
As, Arsenic (ppm) 58 3.3 55 61 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Be, Beryllium (ppm) 1.37 0.135 1.27 1.46 Aqua Regia Digestion
Bi, Bismuth (ppm) 3.35 0.219 3.11 3.59 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.634 0.033 0.611 0.657 Aqua Regia Digestion
Cd, Cadmium (ppm) 1.15 0.15 1.05 1.25 Aqua Regia Digestion
Ce, Cerium (ppm) 26.0 4.8 23.6 28.4 Aqua Regia Digestion
Co, Cobalt (ppm) 19.1 0.93 18.3 19.9 Aqua Regia Digestion
Cr, Chromium (ppm) 45.9 2.01 44.0 47.8 Aqua Regia Digestion
Cs, Caesium (ppm) 7.81 0.85 7.37 8.24 Aqua Regia Digestion
Cu, Copper (wt.%) 1.13 0.029 1.11 1.16 Aqua Regia Digestion
Dy, Dysprosium (ppm) 2.32 0.170 2.14 2.50 Aqua Regia Digestion
Er, Erbium (ppm) 0.90 0.057 0.82 0.97 Aqua Regia Digestion
Eu, Europium (ppm) 0.33 0.04 0.28 0.38 Aqua Regia Digestion
Fe, Iron (wt.%) 3.98 0.088 3.90 4.07 Aqua Regia Digestion
Ga, Gallium (ppm) 8.49 0.341 8.15 8.83 Aqua Regia Digestion
Gd, Gadolinium (ppm) 2.91 0.155 2.69 3.13 Aqua Regia Digestion
Ge, Germanium (ppm) 0.12 0.04 0.10 0.15 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.36 0.04 0.33 0.39 Aqua Regia Digestion
Hg, Mercury (ppm) 0.080 0.015 0.063 0.098 Aqua Regia Digestion
Ho, Holmium (ppm) 0.35 0.018 0.32 0.39 Aqua Regia Digestion
In, Indium (ppm) 0.74 0.030 0.71 0.77 Aqua Regia Digestion
K, Potassium (wt.%) 0.917 0.047 0.886 0.949 Aqua Regia Digestion
La, Lanthanum (ppm) 11.8 2.0 10.7 12.9 Aqua Regia Digestion
Li, Lithium (ppm) 36.2 2.39 34.6 37.9 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.095 0.010 0.085 0.105 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.684 0.038 0.657 0.711 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.033 0.001 0.031 0.034 Aqua Regia Digestion
Mo, Molybdenum (ppm) 493 27 474 511 Aqua Regia Digestion
Na, Sodium (wt.%) 0.142 0.012 0.132 0.151 Aqua Regia Digestion
Nb, Niobium (ppm) 1.11 0.29 0.94 1.29 Aqua Regia Digestion
Nd, Neodymium (ppm) 12.3 2.9 9.3 15.2 Aqua Regia Digestion
Ni, Nickel (ppm) 16.6 0.93 15.7 17.4 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.066 0.002 0.063 0.068 Aqua Regia Digestion
Pb, Lead (ppm) 83 4.4 80 87 Aqua Regia Digestion
Rb, Rubidium (ppm) 90 8.5 85 94 Aqua Regia Digestion
Re, Rhenium (ppm) 0.11 0.006 0.10 0.11 Aqua Regia Digestion
S, Sulphur (wt.%) 1.65 0.078 1.60 1.70 Aqua Regia Digestion
Sb, Antimony (ppm) 1.70 0.39 1.52 1.88 Aqua Regia Digestion
Sc, Scandium (ppm) 7.21 0.409 6.81 7.61 Aqua Regia Digestion
Se, Selenium (ppm) 13.5 1.33 12.5 14.5 Aqua Regia Digestion
Sm, Samarium (ppm) 3.01 0.48 2.56 3.46 Aqua Regia Digestion
Sn, Tin (ppm) 3.24 0.294 3.06 3.42 Aqua Regia Digestion
Sr, Strontium (ppm) 75 2.4 73 78 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.010 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.41 0.07 0.35 0.46 Aqua Regia Digestion
Te, Tellurium (ppm) 1.74 0.18 1.61 1.87 Aqua Regia Digestion
Th, Thorium (ppm) 4.91 0.81 4.40 5.42 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.237 0.011 0.227 0.247 Aqua Regia Digestion
Tl, Thallium (ppm) 0.70 0.030 0.67 0.74 Aqua Regia Digestion
Tm, Thulium (ppm) 0.12 0.010 0.10 0.13 Aqua Regia Digestion
U, Uranium (ppm) 2.86 0.37 2.52 3.20 Aqua Regia Digestion
V, Vanadium (ppm) 59 3.5 57 61 Aqua Regia Digestion
W, Tungsten (ppm) 6.57 0.87 5.88 7.26 Aqua Regia Digestion
Y, Yttrium (ppm) 9.58 0.791 9.08 10.07 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.70 0.048 0.64 0.77 Aqua Regia Digestion
Zn, Zinc (ppm) 410 16 399 421 Aqua Regia Digestion
Zr, Zirconium (ppm) 9.97 1.23 9.23 10.72 Aqua Regia Digestion
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