OREAS 700

OREAS 700 was prepared from skarn tungsten-magnetite ore from the White Rock W-Sn deposit (also known as the Rye Park mine and is located in southern-central NSW, Australia) with the addition of a minor quantity of Cu-Au concentrate. The skarn mineralisation at White Rock is hosted in flat-lying magnetite lenses within interbedded Silurian dacitic volcaniclastics with minor limestone (Hawkins Volcanics), immediately adjacent to a Late Silurian age greisenised granite intrusive (Rye Park Granite).

These lithological units lie regionally within the Eastern Subprovince of the Lachlan Orogen and adjacent to the Frogmore Fault Zone. Skarn mineralisation occurs in lenses up to 12m in thickness and is best developed within the limestone units. Tungsten minerals include ferberite (FeWO4) with lesser scheelite (CaWO4) and these occur with very minor, variable amounts of pyrrhotite, pyrite, cassiterite, molybdenite, chalcopyrite and sphalerite within massive magnetite. Gangue minerals include hedenbergite, andradite, grossular, hornblende, actinolite, feldspar, quartz, epidote, biotite and fluorite.

Twenty three commercial analytical laboratories participated in the program to certify the 105 analytes reported in Table 1. The following methods were employed:

  • Gold via 25-40g fire assay with AAS (10 labs) or ICP-OES (2 labs) finish;
  • Instrumental neutron activation analysis for Au on 1g subsamples to confirm homogeneity (1 laboratory).
  • Borate fusion XRF for full elemental suite (up to 15 laboratories)
  • Loss on ignition (LOI) at 1000°C (10 laboratories)
  • Four acid digestion for full elemental suite ICP-OES and ICP-MS (12 laboratories; with the exception of Cu and Sn – 13 laboratories);
  • Gold via 15-50g aqua regia digestion with ICP-MS (6 labs), AAS (4 labs) finish;
  • Aqua regia digestion for full elemental suite ICP-OES and ICP-MS (12 laboratories);
  • FeO via acid digestion with titrimetric finish (12 laboratories);
  • Mass recovered via Davis tube recovery (10 laboratories);
  • Fe3Ovia Satmagan (10 laboratories).
Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
W, Tungsten (wt.%) 1.13 0.025 1.11 1.14 Borate Fusion XRF
Au, Gold (ppm) 0.506 0.023 0.493 0.520 Pb Fire Assay
Cu, Copper (wt.%) 0.202 0.007 0.199 0.206 4-Acid Digestion
Al2O3, Aluminium(III) oxide (wt.%) 10.62 0.132 10.55 10.69 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 7.86 0.111 7.79 7.92 Borate Fusion XRF
Cl, Chlorine (ppm) 158 22 138 178 Borate Fusion XRF
Cu, Copper (wt.%) 0.204 0.009 0.198 0.209 Borate Fusion XRF
Fe, Iron (wt.%) 16.06 0.175 15.95 16.16 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 1.89 0.028 1.87 1.91 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 1.74 0.038 1.71 1.76 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.415 0.010 0.407 0.422 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 1.65 0.030 1.63 1.67 Borate Fusion XRF
Ni, Nickel (ppm) < 50 IND IND IND Borate Fusion XRF
P, Phosphorus (wt.%) 0.353 0.008 0.348 0.357 Borate Fusion XRF
Pb, Lead (ppm) < 10.0 IND IND IND Borate Fusion XRF
S, Sulphur (wt.%) 0.304 0.014 0.295 0.313 Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 47.30 0.511 47.03 47.58 Borate Fusion XRF
Sn, Tin (ppm) 182 34 156 208 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.320 0.010 0.314 0.327 Borate Fusion XRF
V2O5, Vanadium(V) oxide (ppm) 110 14 101 120 Borate Fusion XRF
Zn, Zinc (ppm) 231 26 216 245 Borate Fusion XRF
LOI1000, Loss On Ignition @1000°C (wt.%) 1.95 0.205 1.79 2.12 Thermogravimetry
Al, Aluminium (wt.%) 5.57 0.296 5.38 5.76 4-Acid Digestion
As, Arsenic (ppm) 4.35 0.57 3.90 4.80 4-Acid Digestion
Ba, Barium (ppm) 158 6 154 162 4-Acid Digestion
Be, Beryllium (ppm) 2.32 0.084 2.27 2.36 4-Acid Digestion
Ca, Calcium (wt.%) 5.55 0.227 5.41 5.69 4-Acid Digestion
Co, Cobalt (ppm) 16.8 2.6 15.0 18.5 4-Acid Digestion
Cr, Chromium (ppm) 47.2 4.8 44.2 50.1 4-Acid Digestion
Cs, Caesium (ppm) 109 6 102 115 4-Acid Digestion
Fe, Iron (wt.%) 15.57 0.920 14.94 16.19 4-Acid Digestion
Ga, Gallium (ppm) 129 5 125 134 4-Acid Digestion
Hf, Hafnium (ppm) 1.42 0.141 1.26 1.58 4-Acid Digestion
In, Indium (ppm) 2.10 0.050 2.06 2.14 4-Acid Digestion
K, Potassium (wt.%) 1.57 0.056 1.53 1.60 4-Acid Digestion
La, Lanthanum (ppm) 32.5 2.43 30.7 34.3 4-Acid Digestion
Li, Lithium (ppm) 223 19 205 242 4-Acid Digestion
Lu, Lutetium (ppm) 0.18 0.014 0.16 0.20 4-Acid Digestion
Mg, Magnesium (wt.%) 0.995 0.025 0.978 1.012 4-Acid Digestion
Mn, Manganese (wt.%) 0.314 0.013 0.306 0.323 4-Acid Digestion
Mo, Molybdenum (ppm) 81 7.5 75 86 4-Acid Digestion
Na, Sodium (wt.%) 1.21 0.053 1.18 1.25 4-Acid Digestion
Ni, Nickel (ppm) 24.1 2.7 22.3 25.9 4-Acid Digestion
P, Phosphorus (wt.%) 0.347 0.029 0.329 0.366 4-Acid Digestion
Pb, Lead (ppm) 6.83 1.33 5.98 7.67 4-Acid Digestion
Rb, Rubidium (ppm) 444 34 416 473 4-Acid Digestion
S, Sulphur (wt.%) 0.295 0.015 0.289 0.301 4-Acid Digestion
Sb, Antimony (ppm) 0.70 0.059 0.65 0.74 4-Acid Digestion
Sc, Scandium (ppm) 9.55 0.878 8.80 10.30 4-Acid Digestion
Sn, Tin (ppm) 133 9 125 140 4-Acid Digestion
Sr, Strontium (ppm) 124 7 119 129 4-Acid Digestion
Th, Thorium (ppm) 7.75 0.751 7.01 8.49 4-Acid Digestion
Ti, Titanium (wt.%) 0.179 0.014 0.168 0.190 4-Acid Digestion
Tl, Thallium (ppm) 2.54 0.43 2.12 2.96 4-Acid Digestion
U, Uranium (ppm) 4.73 0.49 4.25 5.20 4-Acid Digestion
V, Vanadium (ppm) 62 2.0 61 63 4-Acid Digestion
W, Tungsten (wt.%) 0.989 0.081 0.910 1.068 4-Acid Digestion
Y, Yttrium (ppm) 13.5 0.77 12.9 14.1 4-Acid Digestion
Yb, Ytterbium (ppm) 1.26 0.13 1.09 1.42 4-Acid Digestion
Zn, Zinc (ppm) 216 16 205 227 4-Acid Digestion
Zr, Zirconium (ppm) 47.3 4.8 43.4 51.2 4-Acid Digestion
Ag, Silver (ppm) 0.499 0.075 0.450 0.548 Aqua Regia Digestion
Al, Aluminium (wt.%) 3.13 0.143 3.05 3.22 Aqua Regia Digestion
As, Arsenic (ppm) 3.88 0.73 3.47 4.29 Aqua Regia Digestion
Au, Gold (ppm) 0.505 0.034 0.489 0.520 Aqua Regia Digestion
B, Boron (ppm) < 30.0 IND IND IND Aqua Regia Digestion
Ba, Barium (ppm) 81 6.9 76 86 Aqua Regia Digestion
Be, Beryllium (ppm) 0.73 0.041 0.70 0.76 Aqua Regia Digestion
Bi, Bismuth (ppm) 6.89 0.84 6.58 7.19 Aqua Regia Digestion
Ca, Calcium (wt.%) 4.45 0.366 4.21 4.68 Aqua Regia Digestion
Cd, Cadmium (ppm) < 0.50 IND IND IND Aqua Regia Digestion
Ce, Cerium (ppm) 43.9 7.7 36.5 51.3 Aqua Regia Digestion
Co, Cobalt (ppm) 15.2 1.21 14.3 16.1 Aqua Regia Digestion
Cr, Chromium (ppm) 51 2.6 49 52 Aqua Regia Digestion
Cu, Copper (wt.%) 0.203 0.008 0.199 0.206 Aqua Regia Digestion
Fe, Iron (wt.%) 14.66 0.710 14.22 15.10 Aqua Regia Digestion
Ga, Gallium (ppm) 112 10 106 119 Aqua Regia Digestion
Hf, Hafnium (ppm) 0.81 0.12 0.65 0.98 Aqua Regia Digestion
In, Indium (ppm) 1.67 0.109 1.56 1.77 Aqua Regia Digestion
K, Potassium (wt.%) 1.24 0.044 1.21 1.26 Aqua Regia Digestion
La, Lanthanum (ppm) 20.6 1.71 19.4 21.8 Aqua Regia Digestion
Li, Lithium (ppm) 84 6.6 77 91 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.13 0.011 0.12 0.15 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.948 0.058 0.910 0.987 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.237 0.014 0.227 0.246 Aqua Regia Digestion
Mo, Molybdenum (ppm) 83 9 77 89 Aqua Regia Digestion
Na, Sodium (wt.%) 0.164 0.030 0.143 0.185 Aqua Regia Digestion
Nb, Niobium (ppm) 10.4 2.0 8.3 12.5 Aqua Regia Digestion
Ni, Nickel (ppm) 24.5 2.6 22.8 26.2 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.340 0.012 0.331 0.348 Aqua Regia Digestion
Pb, Lead (ppm) 5.10 1.01 4.33 5.87 Aqua Regia Digestion
S, Sulphur (wt.%) 0.297 0.017 0.289 0.306 Aqua Regia Digestion
Sc, Scandium (ppm) 8.77 1.35 7.83 9.71 Aqua Regia Digestion
Se, Selenium (ppm) 2.01 0.151 1.85 2.16 Aqua Regia Digestion
Sn, Tin (ppm) 110 7 104 116 Aqua Regia Digestion
Sr, Strontium (ppm) 46.1 4.07 43.2 49.1 Aqua Regia Digestion
Te, Tellurium (ppm) 0.19 0.03 0.16 0.21 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.097 0.005 0.093 0.100 Aqua Regia Digestion
V, Vanadium (ppm) 56 2.3 55 58 Aqua Regia Digestion
Y, Yttrium (ppm) 11.5 1.2 10.6 12.5 Aqua Regia Digestion
Zn, Zinc (ppm) 207 11 199 214 Aqua Regia Digestion
Zr, Zirconium (ppm) 24.9 1.86 23.2 26.7 Aqua Regia Digestion
FeO, Iron(II) oxide (wt.%) 12.07 0.398 11.81 12.33 Acid Digestion Titration
MassRec, Mass recovered (wt.%) 11.28 0.240 11.11 11.45 Davis Tube Recovery
Fe3O4, Iron(II,III) oxide (wt.%) 10.91 0.196 10.76 11.07 Satmagan 135
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  • 10g Sachet
    $3.80
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    8,600 +
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