Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 133b is one of 8 pigeon paired CRM’s prepared from zinc-lead mineralised material from Xstrata’s Black Star and George Fisher orebodies, Mt Isa, NW Queensland, Australia. The orebodies are sediment hosted ‘SEDEX’ Zn-Pb-Ag deposits located within the Urquart Shale Formation of the Mount Isa Group, a weakly metamorphosed, 5 km thick sequence composed predominantly of Mesoproterozoic carbonate siltstones, mudstones and shales. The Urquart Shale consists of a sequence of alternating pyrite-rich dolomitic siltstone and shale beds up to 1000 metres thick and was deposited in a lacustrine setting within an intracratonic rift basin. The orebodies lie within the upper 650m and are bounded by the Mount Isa fault on the west and by volcanic greenstones to the east. Comprising galena and sphalerite with pyrite and pyrrhotite, the lead-zinc-silver orebodies are concordant with carbonaceous dolomitic sediments and interfinger with the silica-dolomitic mass hosting copper. The CRM OREAS 133b was prepared from a blend of Black Star waste rock, Black Star ore and George Fisher ore.
Analyte | Certified Value | 1SD | 95% Confidence Limits Low | 95% Confidence Limits High | Method |
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Zn, Zinc (wt.%) | 11.35 | 0.347 | 11.15 | 11.54 | 4-Acid Digestion |
Pb, Lead (wt.%) | 5.06 | 0.098 | 5.00 | 5.12 | 4-Acid Digestion |
Ag, Silver (ppm) | 104 | 2 | 103 | 106 | 4-Acid Digestion |
Al2O3, Aluminium(III) oxide (wt.%) | 6.81 | 0.157 | 6.73 | 6.89 | Borate / Peroxide Fusion ICP |
Ba, Barium (ppm) | 799 | 54 | 739 | 860 | Borate / Peroxide Fusion ICP |
CaO, Calcium oxide (wt.%) | 5.61 | 0.351 | 5.32 | 5.89 | Borate / Peroxide Fusion ICP |
Cd, Cadmium (ppm) | 323 | 25 | 296 | 351 | Borate / Peroxide Fusion ICP |
Cu, Copper (ppm) | 327 | 30 | 305 | 349 | Borate / Peroxide Fusion ICP |
Fe, Iron (wt.%) | 8.21 | 0.531 | 7.78 | 8.64 | Borate / Peroxide Fusion ICP |
MgO, Magnesium oxide (wt.%) | 3.83 | 0.106 | 3.74 | 3.92 | Borate / Peroxide Fusion ICP |
Pb, Lead (wt.%) | 5.20 | 0.226 | 5.03 | 5.38 | Borate / Peroxide Fusion ICP |
S, Sulphur (wt.%) | 11.16 | 0.857 | 10.32 | 11.99 | Borate / Peroxide Fusion ICP |
SiO2, Silicon dioxide (wt.%) | 34.12 | 0.877 | 33.35 | 34.88 | Borate / Peroxide Fusion ICP |
Zn, Zinc (wt.%) | 11.62 | 0.393 | 11.30 | 11.94 | Borate / Peroxide Fusion ICP |
Al2O3, Aluminium(III) oxide (wt.%) | 6.91 | 0.262 | 6.76 | 7.05 | 4-Acid Digestion |
As, Arsenic (ppm) | 144 | 13 | 140 | 149 | 4-Acid Digestion |
CaO, Calcium oxide (wt.%) | 5.40 | 0.267 | 5.23 | 5.56 | 4-Acid Digestion |
Cd, Cadmium (ppm) | 311 | 24 | 297 | 325 | 4-Acid Digestion |
Co, Cobalt (ppm) | 22.4 | 2.7 | 20.9 | 23.9 | 4-Acid Digestion |
Cu, Copper (ppm) | 320 | 14 | 313 | 327 | 4-Acid Digestion |
Fe, Iron (wt.%) | 8.16 | 0.345 | 7.96 | 8.36 | 4-Acid Digestion |
MgO, Magnesium oxide (wt.%) | 3.73 | 0.197 | 3.63 | 3.83 | 4-Acid Digestion |
S, Sulphur (wt.%) | 11.54 | 0.307 | 11.30 | 11.79 | 4-Acid Digestion |
Sb, Antimony (ppm) | 181 | 19 | 171 | 191 | 4-Acid Digestion |
Ag, Silver (ppm) | 100 | 6 | 97 | 104 | Aqua Regia Digestion |
Al2O3, Aluminium(III) oxide (wt.%) | 1.33 | 0.126 | 1.25 | 1.42 | Aqua Regia Digestion |
As, Arsenic (ppm) | 144 | 12 | 138 | 151 | Aqua Regia Digestion |
CaO, Calcium oxide (wt.%) | 5.23 | 0.234 | 5.06 | 5.40 | Aqua Regia Digestion |
Cd, Cadmium (ppm) | 303 | 25 | 288 | 318 | Aqua Regia Digestion |
Co, Cobalt (ppm) | 22.9 | 2.25 | 21.5 | 24.3 | Aqua Regia Digestion |
Cu, Copper (ppm) | 332 | 26 | 318 | 346 | Aqua Regia Digestion |
MgO, Magnesium oxide (wt.%) | 3.45 | 0.254 | 3.31 | 3.60 | Aqua Regia Digestion |
Pb, Lead (wt.%) | 5.07 | 0.202 | 4.94 | 5.21 | Aqua Regia Digestion |
S, Sulphur (wt.%) | 11.10 | 0.899 | 10.42 | 11.78 | Aqua Regia Digestion |
Sb, Antimony (ppm) | 155 | 30 | 139 | 171 | Aqua Regia Digestion |
Zn, Zinc (wt.%) | 11.12 | 0.545 | 10.77 | 11.46 | Aqua Regia Digestion |
S, Sulphur (wt.%) | 11.48 | 0.517 | 11.18 | 11.78 | Infrared Combustion |
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