OREAS 21f

OREAS 21f has been prepared from quartz sand to which 0.5% iron oxide has been added to produce a pinkish-tan coloured pulp. This colouring gives the material an appearance of oxide origin (i.e., light orange-brown clay or light iron ore colour). It is characterised by extremely low background gold of less than 1 part per billion.
Ten commercial analytical laboratories participated in the program to characterise the elements reported below. The following methods were employed:

  • Au by low level (1ppb reading resolution) fire assay with ICP-OES or ICP-MS finish;
  • Full ICP-OES and ICP-MS elemental suites by 4-acid (HF-HNO3-HCl-HClO4) digestion.
Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Au, Gold (ppb) < 1 IND IND IND Pb Fire Assay
Ag, Silver (ppm) < 0.050 IND IND IND 4-Acid Digestion
Al, Aluminium (wt.%) 0.099 0.008 0.093 0.105 4-Acid Digestion
Ba, Barium (ppm) 4.58 1.32 3.40 5.76 4-Acid Digestion
Be, Beryllium (ppm) 0.061 0.019 0.053 0.069 4-Acid Digestion
Bi, Bismuth (ppm) < 0.010 IND IND IND 4-Acid Digestion
Cd, Cadmium (ppm) < 0.020 IND IND IND 4-Acid Digestion
Ce, Cerium (ppm) 1.79 0.172 1.69 1.88 4-Acid Digestion
Co, Cobalt (ppm) 0.41 0.05 0.40 0.43 4-Acid Digestion
Cr, Chromium (ppm) 5.39 0.98 4.46 6.32 4-Acid Digestion
Cs, Caesium (ppm) 0.090 0.005 0.086 0.094 4-Acid Digestion
Cu, Copper (ppm) 4.90 0.51 4.54 5.26 4-Acid Digestion
Fe, Iron (wt.%) 0.350 0.019 0.337 0.363 4-Acid Digestion
Ga, Gallium (ppm) 0.22 0.04 0.19 0.26 4-Acid Digestion
Hf, Hafnium (ppm) 0.20 0.02 0.19 0.22 4-Acid Digestion
In, Indium (ppm) < 0.020 IND IND IND 4-Acid Digestion
K, Potassium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
La, Lanthanum (ppm) 0.88 0.09 0.82 0.94 4-Acid Digestion
Li, Lithium (ppm) 15.0 1.10 14.1 15.8 4-Acid Digestion
Mg, Magnesium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Mn, Manganese (wt.%) 0.004 0.000 0.003 0.004 4-Acid Digestion
Mo, Molybdenum (ppm) 0.48 0.06 0.45 0.50 4-Acid Digestion
Na, Sodium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Nb, Niobium (ppm) 0.55 0.07 0.51 0.58 4-Acid Digestion
Ni, Nickel (ppm) 3.33 0.65 2.96 3.70 4-Acid Digestion
P, Phosphorus (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Rb, Rubidium (ppm) 0.28 0.07 0.23 0.33 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Sb, Antimony (ppm) 0.14 0.04 0.10 0.17 4-Acid Digestion
Se, Selenium (ppm) < 1.00 IND IND IND 4-Acid Digestion
Sn, Tin (ppm) 0.40 0.14 0.29 0.50 4-Acid Digestion
Sr, Strontium (ppm) 0.62 0.17 0.47 0.77 4-Acid Digestion
Ta, Tantalum (ppm) < 0.050 IND IND IND 4-Acid Digestion
Te, Tellurium (ppm) < 0.050 IND IND IND 4-Acid Digestion
Th, Thorium (ppm) 0.57 0.06 0.53 0.61 4-Acid Digestion
Ti, Titanium (wt.%) 0.016 0.001 0.016 0.016 4-Acid Digestion
Tl, Thallium (ppm) < 0.020 IND IND IND 4-Acid Digestion
U, Uranium (ppm) 0.11 0.02 0.09 0.12 4-Acid Digestion
W, Tungsten (ppm) 0.11 0.03 0.10 0.12 4-Acid Digestion
Y, Yttrium (ppm) 0.57 0.06 0.52 0.61 4-Acid Digestion
Zn, Zinc (ppm) 3.28 0.78 3.10 3.46 4-Acid Digestion
Zr, Zirconium (ppm) 5.91 1.05 5.15 6.67 4-Acid Digestion
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Pricing & Stock
  • Pack Size
    Price
    Stock Level
  • 10g Sachet
    $2.15
    380,000 +
  • 60g Sachet
    $3.85
    74,000 +
  • 1Kg Jar
    $64.00
    3,700 +
Specifications
CRM Group