OREAS 260 Au (16.04 ppb) mudstone

OR260_60g
Item: OR260_60g
Unit of measure: ea
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OREAS 260 was prepared from a blend of gold-bearing oxide ore from one of the Sepon gold deposits and barren mudstone sourced from a quarry east of Melbourne, Australia. The Sepon Mineral District stratigraphy comprises Devonian to Carboniferous aged continental fluvial and shallow to deep marine sediments deposited in a half graben basin. Gold mineralisation is localised in structural and stratigraphic fluid traps similar in style to the sediment-hosted gold deposits of the Carlin Trend, Nevada, USA. Mineralisation is finely disseminated and closely associated with decalcification and variable silica replacement of calcareous rocks along structures and at lithological contacts.

The Sepon deposit is located approximately 40 kilometres north of the town of Sepon, in Savannakhet province of south-central Laos. OREAS 260 is one of a suite of four oxide gold CRMs ranging in gold content from 16 to 214ppb.   

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Download DataPack OREAS260

AnalyteCertified Value1SD95% CI Low95% CI HighMethod
Au, Gold (ppb)1621517Pb Fire Assay
Au, Gold (ppb)1421314Aqua Regia Digestion (sample weights 10-50g)
Cu, Copper (ppm)46.52.2945.647.3Aqua Regia Digestion
Ag, Silver (ppm)0.1460.0130.1390.152Aqua Regia Digestion
Al, Aluminium (wt.%)1.330.1391.261.39Aqua Regia Digestion
As, Arsenic (ppm)12.51.511.913.1Aqua Regia Digestion
Ba, Barium (ppm)15112145157Aqua Regia Digestion
Be, Beryllium (ppm)1.240.0991.21.28Aqua Regia Digestion
Bi, Bismuth (ppm)0.540.030.530.56Aqua Regia Digestion
Ca, Calcium (wt.%)0.8850.0470.8670.904Aqua Regia Digestion
Cd, Cadmium (ppm)0.210.0170.210.22Aqua Regia Digestion
Co, Cobalt (ppm)32.11.3831.632.7Aqua Regia Digestion
Cr, Chromium (ppm)49.24.947.251.2Aqua Regia Digestion
Dy, Dysprosium (ppm)2.640.342.352.93Aqua Regia Digestion
Er, Erbium (ppm)1.220.0961.141.31Aqua Regia Digestion
Eu, Europium (ppm)0.880.110.790.97Aqua Regia Digestion
Fe, Iron (wt.%)3.730.1613.673.79Aqua Regia Digestion
Ga, Gallium (ppm)5.050.714.75.4Aqua Regia Digestion
Gd, Gadolinium (ppm)4.040.643.484.59Aqua Regia Digestion
Ho, Holmium (ppm)0.440.050.390.48Aqua Regia Digestion
In, Indium (ppm)0.0270.0050.0250.029Aqua Regia Digestion
K, Potassium (wt.%)0.2850.0550.2610.309Aqua Regia Digestion
Li, Lithium (ppm)21.51.292122.1Aqua Regia Digestion
Lu, Lutetium (ppm)0.140.0060.140.15Aqua Regia Digestion
Mg, Magnesium (wt.%)0.5930.0240.5830.603Aqua Regia Digestion
Mn, Manganese (wt.%)0.0450.0030.0440.046Aqua Regia Digestion
Mo, Molybdenum (ppm)0.430.0290.410.44Aqua Regia Digestion
Na, Sodium (wt.%)0.0820.0060.0790.084Aqua Regia Digestion
Ni, Nickel (ppm)752.77476Aqua Regia Digestion
P, Phosphorus (wt.%)0.040.0020.0390.041Aqua Regia Digestion
Pb, Lead (ppm)30.71.9629.931.5Aqua Regia Digestion
S, Sulphur (wt.%)0.0770.0040.0760.079Aqua Regia Digestion
Sb, Antimony (ppm)1.320.171.241.39Aqua Regia Digestion
Sc, Scandium (ppm)3.390.533.163.62Aqua Regia Digestion
Sm, Samarium (ppm)4.80.94.015.59Aqua Regia Digestion
Sr, Strontium (ppm)14.81.2214.215.3Aqua Regia Digestion
Tb, Terbium (ppm)0.520.070.470.57Aqua Regia Digestion
Te, Tellurium (ppm)0.0810.0160.0740.088Aqua Regia Digestion
Th, Thorium (ppm)11.31.210.811.9Aqua Regia Digestion
Tl, Thallium (ppm)0.220.040.20.23Aqua Regia Digestion
Tm, Thulium (ppm)0.160.030.130.2Aqua Regia Digestion
U, Uranium (ppm)1.290.171.211.37Aqua Regia Digestion
V, Vanadium (ppm)222.42123.1Aqua Regia Digestion
W, Tungsten (ppm)0.0630.0070.0590.067Aqua Regia Digestion
Y, Yttrium (ppm)11.71.211.212.3Aqua Regia Digestion
Yb, Ytterbium (ppm)0.990.0970.931.05Aqua Regia Digestion
Zn, Zinc (ppm)1256123128Aqua Regia Digestion