OREAS 782

OREAS 782 was prepared from a blend of fluorite-bearing materials and barren siliceous waste rock. The fluorine-bearing component was sourced from the Speewah region, Western Australia, where fluorite mineralisation occurs within iron-rich lithologies. Fluorine is present predominantly as fluorite (CaF₂), accompanied by minor iron oxides and silicate gangue minerals. The barren waste rock was sourced from Victoria, Australia and is composed predominantly of quartz and muscovite/sericite, with minor vermiculite, phlogopite, plagioclase, K-feldspar and tourmaline. The material is also anomalous in As, Au, Bi, La, Sb, W and Sn.

Twenty-four commercial analytical laboratories participated in the program to certify the elements reported below using the following methods:

  • Borate Fusion XRF- Majors and some traces
  • F addon to fusion XRF package
  • F by ion selective electrode
  • 4-Acid – Full ICP-OES and MS elemental suites

Certified values for applicable analytes are operationally defined for each method, with results under OREAS ISO 17034 scope of accreditation.

Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Al2O3, Aluminium(III) oxide (wt.%) 8.91 0.144 8.80 9.02 Oxidising Fusion XRF
As, Arsenic (ppm) 297 57 187 407 Oxidising Fusion XRF
BaO, Barium oxide (ppm) 1205 70 1115 1294 Oxidising Fusion XRF
Ca, Calcium (wt.%) 16.45 0.167 16.29 16.62 Oxidising Fusion XRF
Co, Cobalt (ppm) < 100 IND IND IND Oxidising Fusion XRF
Cr, Chromium (ppm) 78 14 57 98 Oxidising Fusion XRF
Cu, Copper (ppm) 85 13 65 104 Oxidising Fusion XRF
F, Fluorine (wt.%) 15.20 0.364 14.81 15.58 Oxidising Fusion XRF
Fe, Iron (wt.%) 1.83 0.049 1.80 1.86 Oxidising Fusion XRF
HfO2, Hafnium dioxide (ppm) < 100 IND IND IND Oxidising Fusion XRF
K2O, Potassium oxide (wt.%) 1.71 0.043 1.68 1.74 Oxidising Fusion XRF
MgO, Magnesium oxide (wt.%) 0.348 0.023 0.329 0.367 Oxidising Fusion XRF
Nb, Niobium (ppm) < 50 IND IND IND Oxidising Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.041 0.006 0.033 0.049 Oxidising Fusion XRF
S, Sulphur (ppm) 204 40 168 241 Oxidising Fusion XRF
SiO2, Silicon dioxide (wt.%) 51.22 0.606 50.73 51.72 Oxidising Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.450 0.019 0.437 0.463 Oxidising Fusion XRF
W, Tungsten (ppm) 187 23 165 209 Oxidising Fusion XRF
Zr, Zirconium (ppm) 115 30 91 139 Oxidising Fusion XRF
LOI1000, Loss on ignition @1000 °C (wt.%) 5.14 1.29 4.42 5.85 Thermogravimetry
F, Fluorine (wt.%) 14.57 2.13 13.02 16.12 Ion Selective Electrode
Ag, Silver (ppm) 0.347 0.016 0.318 0.375 4-Acid Digestion
Al, Aluminium (wt.%) 4.63 0.202 4.48 4.79 4-Acid Digestion
As, Arsenic (ppm) 276 11 266 286 4-Acid Digestion
Ba, Barium (ppm) 1065 39 1032 1098 4-Acid Digestion
Be, Beryllium (ppm) 2.68 0.128 2.58 2.78 4-Acid Digestion
Bi, Bismuth (ppm) 248 14 237 258 4-Acid Digestion
Ca, Calcium (wt.%) 16.42 0.644 15.94 16.90 4-Acid Digestion
Ce, Cerium (ppm) 64 2.5 62 67 4-Acid Digestion
Co, Cobalt (ppm) 2.04 0.26 1.81 2.26 4-Acid Digestion
Cr, Chromium (ppm) 60 10 54 66 4-Acid Digestion
Cs, Caesium (ppm) 6.53 0.217 6.27 6.79 4-Acid Digestion
Cu, Copper (ppm) 80 3.5 77 83 4-Acid Digestion
Dy, Dysprosium (ppm) 3.59 0.153 3.37 3.80 4-Acid Digestion
Er, Erbium (ppm) 1.89 0.120 1.70 2.08 4-Acid Digestion
Eu, Europium (ppm) 0.98 0.053 0.89 1.06 4-Acid Digestion
Fe, Iron (wt.%) 1.82 0.049 1.77 1.88 4-Acid Digestion
Ga, Gallium (ppm) 11.8 0.79 11.2 12.5 4-Acid Digestion
Gd, Gadolinium (ppm) 4.45 0.184 4.16 4.73 4-Acid Digestion
Hf, Hafnium (ppm) 2.53 0.170 2.33 2.72 4-Acid Digestion
Ho, Holmium (ppm) 0.67 0.045 0.62 0.73 4-Acid Digestion
In, Indium (ppm) 0.062 0.007 0.053 0.072 4-Acid Digestion
K, Potassium (wt.%) 1.47 0.038 1.43 1.51 4-Acid Digestion
La, Lanthanum (ppm) 32.3 1.46 30.9 33.8 4-Acid Digestion
Li, Lithium (ppm) 39.0 1.93 37.3 40.8 4-Acid Digestion
Lu, Lutetium (ppm) 0.26 0.026 0.22 0.30 4-Acid Digestion
Mg, Magnesium (wt.%) 0.195 0.017 0.182 0.208 4-Acid Digestion
Mn, Manganese (wt.%) 0.005 0.000 0.005 0.005 4-Acid Digestion
Mo, Molybdenum (ppm) 3.68 0.213 3.43 3.93 4-Acid Digestion
Na, Sodium (wt.%) 0.100 0.014 0.089 0.111 4-Acid Digestion
Nb, Niobium (ppm) 7.83 0.720 7.14 8.51 4-Acid Digestion
Nd, Neodymium (ppm) 26.7 1.15 25.4 28.0 4-Acid Digestion
Ni, Nickel (ppm) 11.3 0.80 10.6 12.0 4-Acid Digestion
P, Phosphorus (wt.%) 0.020 0.001 0.019 0.021 4-Acid Digestion
Pb, Lead (ppm) 14.5 1.06 13.7 15.4 4-Acid Digestion
Pr, Praseodymium (ppm) 7.05 0.292 6.63 7.46 4-Acid Digestion
Rb, Rubidium (ppm) 83 3.2 80 87 4-Acid Digestion
S, Sulphur (wt.%) 0.025 0.004 0.022 0.027 4-Acid Digestion
Sb, Antimony (ppm) 5.16 0.384 4.85 5.47 4-Acid Digestion
Sc, Scandium (ppm) 9.02 0.352 8.55 9.48 4-Acid Digestion
Se, Selenium (ppm) 1.00 0.11 0.89 1.10 4-Acid Digestion
Sm, Samarium (ppm) 5.00 0.192 4.65 5.34 4-Acid Digestion
Sn, Tin (ppm) 9.86 0.625 9.33 10.39 4-Acid Digestion
Sr, Strontium (ppm) 51 2.4 49 53 4-Acid Digestion
Ta, Tantalum (ppm) 0.59 0.06 0.52 0.66 4-Acid Digestion
Tb, Terbium (ppm) 0.65 0.037 0.58 0.72 4-Acid Digestion
Te, Tellurium (ppm) 0.20 0.02 0.16 0.24 4-Acid Digestion
Th, Thorium (ppm) 9.94 0.459 9.54 10.34 4-Acid Digestion
Ti, Titanium (wt.%) 0.240 0.016 0.229 0.252 4-Acid Digestion
Tl, Thallium (ppm) 0.47 0.037 0.44 0.51 4-Acid Digestion
Tm, Thulium (ppm) 0.26 0.015 0.25 0.28 4-Acid Digestion
U, Uranium (ppm) 1.94 0.087 1.83 2.05 4-Acid Digestion
V, Vanadium (ppm) 62 2.2 60 64 4-Acid Digestion
W, Tungsten (ppm) 178 7 171 186 4-Acid Digestion
Y, Yttrium (ppm) 45.5 2.33 43.6 47.3 4-Acid Digestion
Yb, Ytterbium (ppm) 1.86 0.097 1.73 2.00 4-Acid Digestion
Zn, Zinc (ppm) 21.6 1.97 20.3 22.9 4-Acid Digestion
Zr, Zirconium (ppm) 85 5.3 81 90 4-Acid Digestion
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