Specifications
-
CRM State:
-
Matrix:
-
Mineralisation:
OREAS 247 was prepared from a blend of high grade gold-bearing ore and barren metasediments. The gold ore was sourced from the central Victorian goldfields and is hosted within a metamorphosed turbidite sequence of interbedded sandstones, siltstones and shales. Gold mineralisation mainly occurs within disseminated arsenopyrite and pyrite ± stibnite-quartz zones.
Thirty-five commercial analytical laboratories participated in the program to certify:
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
---|---|---|---|---|---|
Au, Gold (ppm) | 42.96 | 0.900 | 42.69 | 43.23 | Pb Fire Assay |
Au, Gold (ppm) | 43.24 | 1.187 | 41.73 | 44.74 | PhotonAssay |
Ag, Silver (ppm) | 2.16 | 0.121 | 2.10 | 2.22 | 4-Acid Digestion |
Al, Aluminium (wt.%) | 6.08 | 0.250 | 5.98 | 6.18 | 4-Acid Digestion |
As, Arsenic (ppm) | 3514 | 173 | 3421 | 3607 | 4-Acid Digestion |
Ba, Barium (ppm) | 550 | 15 | 544 | 556 | 4-Acid Digestion |
Be, Beryllium (ppm) | 2.23 | 0.180 | 2.15 | 2.30 | 4-Acid Digestion |
Bi, Bismuth (ppm) | 0.58 | 0.025 | 0.57 | 0.59 | 4-Acid Digestion |
Ca, Calcium (wt.%) | 0.826 | 0.029 | 0.814 | 0.838 | 4-Acid Digestion |
Cd, Cadmium (ppm) | 0.065 | 0.015 | 0.057 | 0.074 | 4-Acid Digestion |
Ce, Cerium (ppm) | 67 | 3.9 | 65 | 69 | 4-Acid Digestion |
Co, Cobalt (ppm) | 12.0 | 0.41 | 11.8 | 12.2 | 4-Acid Digestion |
Cr, Chromium (ppm) | 97 | 8.5 | 93 | 101 | 4-Acid Digestion |
Cs, Caesium (ppm) | 8.49 | 0.453 | 8.30 | 8.67 | 4-Acid Digestion |
Cu, Copper (ppm) | 42.2 | 2.71 | 41.1 | 43.4 | 4-Acid Digestion |
Dy, Dysprosium (ppm) | 2.73 | 0.35 | 2.50 | 2.95 | 4-Acid Digestion |
Er, Erbium (ppm) | 1.49 | 0.20 | 1.37 | 1.62 | 4-Acid Digestion |
Eu, Europium (ppm) | 0.96 | 0.072 | 0.92 | 1.00 | 4-Acid Digestion |
Fe, Iron (wt.%) | 3.32 | 0.105 | 3.28 | 3.37 | 4-Acid Digestion |
Ga, Gallium (ppm) | 16.3 | 1.16 | 15.8 | 16.8 | 4-Acid Digestion |
Gd, Gadolinium (ppm) | 4.23 | 0.45 | 3.96 | 4.50 | 4-Acid Digestion |
Hf, Hafnium (ppm) | 3.57 | 0.314 | 3.43 | 3.71 | 4-Acid Digestion |
Ho, Holmium (ppm) | 0.54 | 0.07 | 0.47 | 0.60 | 4-Acid Digestion |
In, Indium (ppm) | 0.058 | 0.005 | 0.055 | 0.060 | 4-Acid Digestion |
K, Potassium (wt.%) | 2.45 | 0.103 | 2.40 | 2.49 | 4-Acid Digestion |
La, Lanthanum (ppm) | 33.1 | 2.22 | 32.1 | 34.0 | 4-Acid Digestion |
Li, Lithium (ppm) | 31.8 | 1.37 | 31.2 | 32.3 | 4-Acid Digestion |
Lu, Lutetium (ppm) | 0.24 | 0.03 | 0.21 | 0.26 | 4-Acid Digestion |
Mg, Magnesium (wt.%) | 1.22 | 0.044 | 1.20 | 1.24 | 4-Acid Digestion |
Mn, Manganese (wt.%) | 0.036 | 0.001 | 0.035 | 0.036 | 4-Acid Digestion |
Mo, Molybdenum (ppm) | 1.76 | 0.139 | 1.70 | 1.81 | 4-Acid Digestion |
Na, Sodium (wt.%) | 0.499 | 0.037 | 0.482 | 0.515 | 4-Acid Digestion |
Nb, Niobium (ppm) | 11.7 | 1.4 | 11.1 | 12.4 | 4-Acid Digestion |
Nd, Neodymium (ppm) | 29.3 | 1.69 | 28.4 | 30.3 | 4-Acid Digestion |
Ni, Nickel (ppm) | 45.9 | 2.73 | 44.8 | 47.0 | 4-Acid Digestion |
P, Phosphorus (wt.%) | 0.048 | 0.003 | 0.047 | 0.049 | 4-Acid Digestion |
Pb, Lead (ppm) | 31.9 | 2.15 | 31.0 | 32.8 | 4-Acid Digestion |
Pr, Praseodymium (ppm) | 7.90 | 0.541 | 7.56 | 8.25 | 4-Acid Digestion |
Rb, Rubidium (ppm) | 144 | 9 | 140 | 147 | 4-Acid Digestion |
Re, Rhenium (ppm) | < 0.002 | IND | IND | IND | 4-Acid Digestion |
S, Sulphur (wt.%) | 0.714 | 0.039 | 0.696 | 0.732 | 4-Acid Digestion |
Sb, Antimony (ppm) | 3295 | 115 | 3230 | 3360 | 4-Acid Digestion |
Sc, Scandium (ppm) | 11.4 | 0.80 | 11.0 | 11.7 | 4-Acid Digestion |
Sm, Samarium (ppm) | 5.50 | 0.401 | 5.26 | 5.73 | 4-Acid Digestion |
Sn, Tin (ppm) | 3.31 | 0.262 | 3.20 | 3.42 | 4-Acid Digestion |
Sr, Strontium (ppm) | 96 | 4.2 | 95 | 98 | 4-Acid Digestion |
Ta, Tantalum (ppm) | 0.92 | 0.063 | 0.88 | 0.95 | 4-Acid Digestion |
Tb, Terbium (ppm) | 0.53 | 0.026 | 0.51 | 0.54 | 4-Acid Digestion |
Th, Thorium (ppm) | 12.6 | 0.53 | 12.4 | 12.8 | 4-Acid Digestion |
Ti, Titanium (wt.%) | 0.390 | 0.025 | 0.379 | 0.400 | 4-Acid Digestion |
Tl, Thallium (ppm) | 0.80 | 0.052 | 0.77 | 0.82 | 4-Acid Digestion |
Tm, Thulium (ppm) | 0.23 | 0.03 | 0.20 | 0.25 | 4-Acid Digestion |
U, Uranium (ppm) | 2.53 | 0.115 | 2.49 | 2.57 | 4-Acid Digestion |
V, Vanadium (ppm) | 82 | 4.1 | 80 | 84 | 4-Acid Digestion |
W, Tungsten (ppm) | 7.88 | 1.32 | 7.16 | 8.59 | 4-Acid Digestion |
Y, Yttrium (ppm) | 13.1 | 1.8 | 12.3 | 13.9 | 4-Acid Digestion |
Yb, Ytterbium (ppm) | 1.54 | 0.19 | 1.42 | 1.66 | 4-Acid Digestion |
Zn, Zinc (ppm) | 86 | 3.7 | 85 | 88 | 4-Acid Digestion |
Zr, Zirconium (ppm) | 125 | 13 | 119 | 130 | 4-Acid Digestion |
Each quarter, we will keep you up to date with news on the latest OREAS CRMs and QA/QC best practices in the analytical industry.