OREAS 21e

OREAS 21e has been prepared from quartz sand to which 0.5% iron oxide has been added to produce a light brown coloured pulp. This colouring gives the material an appearance of oxide origin (i.e. light brown clay or light iron ore colour). It is characterised by extremely low background gold of less than 1 part per billion.

Analyte Certified Value 1SD 95% Confidence Low 95% Confidence High Method
Au, Gold (ppb) < 1 IND IND IND Pb Fire Assay
Cu, Copper (ppm) 5.68 0.81 5.25 6.11 4-Acid Digestion
Ag, Silver (ppm) < 0.050 IND IND IND 4-Acid Digestion
Al, Aluminium (wt.%) 0.098 0.018 0.085 0.111 4-Acid Digestion
Ba, Barium (ppm) 3.90 1.04 3.24 4.57 4-Acid Digestion
Be, Beryllium (ppm) 0.065 0.019 0.052 0.078 4-Acid Digestion
Bi, Bismuth (ppm) < 0.020 IND IND IND 4-Acid Digestion
Cd, Cadmium (ppm) < 0.020 IND IND IND 4-Acid Digestion
Ce, Cerium (ppm) 2.19 0.163 2.09 2.29 4-Acid Digestion
Co, Cobalt (ppm) 0.42 0.05 0.40 0.44 4-Acid Digestion
Cr, Chromium (ppm) 4.50 0.87 3.72 5.28 4-Acid Digestion
Cs, Caesium (ppm) 0.10 0.01 0.09 0.11 4-Acid Digestion
Fe, Iron (wt.%) 0.350 0.016 0.339 0.361 4-Acid Digestion
Ga, Gallium (ppm) 0.23 0.03 0.21 0.25 4-Acid Digestion
Hf, Hafnium (ppm) 0.24 0.05 0.22 0.27 4-Acid Digestion
In, Indium (ppm) < 0.005 IND IND IND 4-Acid Digestion
K, Potassium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
La, Lanthanum (ppm) 1.06 0.097 1.00 1.12 4-Acid Digestion
Li, Lithium (ppm) 14.8 0.58 14.4 15.2 4-Acid Digestion
Mg, Magnesium (wt.%) < 0.010 IND IND IND 4-Acid Digestion
Mn, Manganese (wt.%) 0.003 0.000 0.003 0.003 4-Acid Digestion
Mo, Molybdenum (ppm) 0.69 0.050 0.67 0.72 4-Acid Digestion
Na, Sodium (wt.%) < 0.005 IND IND IND 4-Acid Digestion
Nb, Niobium (ppm) 0.95 0.070 0.91 0.99 4-Acid Digestion
Nd, Neodymium (ppm) 0.92 0.086 0.87 0.97 4-Acid Digestion
Ni, Nickel (ppm) 2.70 0.31 2.52 2.88 4-Acid Digestion
P, Phosphorus (wt.%) < 0.005 IND IND IND 4-Acid Digestion
Pb, Lead (ppm) < 1.00 IND IND IND 4-Acid Digestion
Pr, Praseodymium (ppm) 0.28 0.05 0.23 0.32 4-Acid Digestion
Rb, Rubidium (ppm) 0.39 0.05 0.37 0.41 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) < 0.005 IND IND IND 4-Acid Digestion
Sb, Antimony (ppm) 0.21 0.04 0.17 0.25 4-Acid Digestion
Se, Selenium (ppm) < 2.00 IND IND IND 4-Acid Digestion
Sm, Samarium (ppm) 0.20 0.04 0.17 0.22 4-Acid Digestion
Sn, Tin (ppm) 0.54 0.054 0.52 0.57 4-Acid Digestion
Sr, Strontium (ppm) 0.67 0.13 0.55 0.78 4-Acid Digestion
Ta, Tantalum (ppm) < 0.10 IND IND IND 4-Acid Digestion
Tb, Terbium (ppm) < 0.050 IND IND IND 4-Acid Digestion
Te, Tellurium (ppm) < 0.050 IND IND IND 4-Acid Digestion
Th, Thorium (ppm) 0.69 0.066 0.65 0.73 4-Acid Digestion
Ti, Titanium (wt.%) 0.030 0.001 0.029 0.030 4-Acid Digestion
Tl, Thallium (ppm) < 0.020 IND IND IND 4-Acid Digestion
Tm, Thulium (ppm) < 0.050 IND IND IND 4-Acid Digestion
U, Uranium (ppm) 0.14 0.04 0.12 0.17 4-Acid Digestion
V, Vanadium (ppm) 2.28 0.45 2.02 2.53 4-Acid Digestion
W, Tungsten (ppm) 0.20 0.05 0.17 0.22 4-Acid Digestion
Y, Yttrium (ppm) 0.65 0.058 0.61 0.69 4-Acid Digestion
Yb, Ytterbium (ppm) 0.078 0.024 0.055 0.101 4-Acid Digestion
Zn, Zinc (ppm) 2.91 0.56 2.58 3.23 4-Acid Digestion
Zr, Zirconium (ppm) 7.57 0.632 7.13 8.01 4-Acid Digestion
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