OREAS 353

OREAS 353 is a certified reference material (CRM) prepared from a Pb-Ag concentrate sample sourced from South32 Ltd’s Cannington mine plant. The stratabound, metasediment hosted (Broken Hill Type) deposit is located ~200 kms south-east of Mount Isa in north-west Queensland, Australia. The major sulphides occur as argentiferous galena and sphalerite with subordinate magnetite-pyrrhotite and minor marcasite and arsenopyrite-lollingite-chalcopyrite. OREAS 353 is certified for:

  • Lead by ethylenediamminetetraacetic acid (EDTA) with titration finish
  • Silver by reduced charge, fire assay with gravimetric finish
  • Moisture (H2O-) at 105°C by thermogravimetry
  • Full ICP-OES & MS elemental suites by 4-acid digestion
  • Full ICP-OES elemental suite by peroxide fusion
  • S and C by infrared combustion furnace

 

Analyte Certified Value 1SD 95% Confidence Limits Low 95% Confidence Limits High Method
Pb, Lead (wt.%) 61.26 0.117 61.19 61.34 Classical Wet Chemistry
Ag, Silver (ppm) 2184 17 2173 2196 Pb Fire Assay
Zn, Zinc (wt.%) 4.13 0.130 4.06 4.20 4-Acid Digestion
Al, Aluminium (wt.%) 0.204 0.010 0.197 0.211 4-Acid Digestion
As, Arsenic (ppm) 490 53 455 524 4-Acid Digestion
Ba, Barium (ppm) 25.0 3.2 22.3 27.7 4-Acid Digestion
Be, Beryllium (ppm) < 0.50 IND IND IND 4-Acid Digestion
Bi, Bismuth (ppm) 32.1 1.94 30.9 33.3 4-Acid Digestion
Ca, Calcium (wt.%) 0.236 0.010 0.230 0.242 4-Acid Digestion
Cd, Cadmium (ppm) 205 7 201 209 4-Acid Digestion
Ce, Cerium (ppm) 14.0 1.21 13.0 15.0 4-Acid Digestion
Co, Cobalt (ppm) 48.8 4.10 46.4 51.3 4-Acid Digestion
Cr, Chromium (ppm) 136 7 131 140 4-Acid Digestion
Cs, Caesium (ppm) 0.19 0.010 0.18 0.20 4-Acid Digestion
Cu, Copper (wt.%) 0.312 0.009 0.307 0.318 4-Acid Digestion
Dy, Dysprosium (ppm) 0.77 0.13 0.63 0.91 4-Acid Digestion
Eu, Europium (ppm) 1.63 0.21 1.42 1.85 4-Acid Digestion
Fe, Iron (wt.%) 5.35 0.174 5.25 5.45 4-Acid Digestion
Ga, Gallium (ppm) 1.35 0.19 1.13 1.57 4-Acid Digestion
Gd, Gadolinium (ppm) 1.01 0.13 0.90 1.11 4-Acid Digestion
In, Indium (ppm) 2.01 0.22 1.85 2.17 4-Acid Digestion
K, Potassium (wt.%) 0.045 0.005 0.042 0.048 4-Acid Digestion
La, Lanthanum (ppm) 7.91 0.746 7.38 8.44 4-Acid Digestion
Li, Lithium (ppm) 4.27 0.76 3.43 5.12 4-Acid Digestion
Mg, Magnesium (wt.%) 0.685 0.029 0.667 0.703 4-Acid Digestion
Mn, Manganese (wt.%) 0.184 0.006 0.180 0.187 4-Acid Digestion
Mo, Molybdenum (ppm) 18.4 1.25 17.4 19.3 4-Acid Digestion
Na, Sodium (wt.%) 0.028 0.004 0.025 0.030 4-Acid Digestion
Nb, Niobium (ppm) 0.80 0.13 0.69 0.91 4-Acid Digestion
Nd, Neodymium (ppm) 5.29 0.483 4.72 5.85 4-Acid Digestion
Ni, Nickel (ppm) 38.4 3.12 36.6 40.2 4-Acid Digestion
P, Phosphorus (wt.%) 0.024 0.001 0.024 0.025 4-Acid Digestion
Pr, Praseodymium (ppm) 1.43 0.18 1.24 1.61 4-Acid Digestion
Rb, Rubidium (ppm) 2.06 0.139 1.93 2.19 4-Acid Digestion
S, Sulphur (wt.%) 15.13 0.834 14.45 15.81 4-Acid Digestion
Sb, Antimony (ppm) 1746 133 1664 1828 4-Acid Digestion
Se, Selenium (ppm) 4.95 0.480 4.46 5.44 4-Acid Digestion
Sm, Samarium (ppm) 1.10 0.23 0.86 1.35 4-Acid Digestion
Sn, Tin (ppm) 7.67 0.98 6.81 8.54 4-Acid Digestion
Sr, Strontium (ppm) 10.8 1.1 10.1 11.4 4-Acid Digestion
Th, Thorium (ppm) 0.85 0.09 0.79 0.90 4-Acid Digestion
Ti, Titanium (wt.%) 0.013 0.002 0.011 0.014 4-Acid Digestion
Tl, Thallium (ppm) 0.83 0.09 0.74 0.92 4-Acid Digestion
U, Uranium (ppm) 1.79 0.125 1.70 1.89 4-Acid Digestion
V, Vanadium (ppm) 10.6 0.68 10.2 10.9 4-Acid Digestion
W, Tungsten (ppm) 1.81 0.125 1.68 1.93 4-Acid Digestion
Y, Yttrium (ppm) 4.32 0.53 3.86 4.77 4-Acid Digestion
Zr, Zirconium (ppm) 3.91 0.97 2.60 5.22 4-Acid Digestion
Al, Aluminium (wt.%) 0.206 0.013 0.198 0.215 Peroxide Fusion ICP
As, Arsenic (ppm) 538 33 494 582 Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.255 0.052 0.211 0.299 Peroxide Fusion ICP
Co, Cobalt (ppm) 52 4.4 50 55 Peroxide Fusion ICP
Cr, Chromium (ppm) 169 33 148 189 Peroxide Fusion ICP
Fe, Iron (wt.%) 5.44 0.100 5.38 5.49 Peroxide Fusion ICP
Mg, Magnesium (wt.%) 0.704 0.017 0.692 0.715 Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.186 0.004 0.184 0.189 Peroxide Fusion ICP
S, Sulphur (wt.%) 16.08 0.542 15.65 16.51 Peroxide Fusion ICP
Sb, Antimony (ppm) 1827 67 1778 1877 Peroxide Fusion ICP
SiO2, Silicon dioxide (wt.%) 5.14 0.219 5.01 5.27 Peroxide Fusion ICP
Zn, Zinc (wt.%) 4.14 0.101 4.06 4.21 Peroxide Fusion ICP
C, Carbon (wt.%) 0.766 0.047 0.741 0.791 Infrared Combustion
S, Sulphur (wt.%) 15.13 0.719 14.69 15.56 Infrared Combustion
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