Description
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AMIS0685 Au 81.20g/t U 3535 ppm Wits South Africa
Origin of Material
The origin of the material is Witwatersrand Ore Basin from Harmony Gold Mine.
Approximate Mineral and Chemical Composition
Throughout the Witwatersrand, gold ores occur in sheets or reefs originally deposited horizontally under water. The thickness of the reefs range between a lie of grit to several meters, with an average of 300mm. The sediments were also intersected by dykes and sills of dolomite, diabase and syenite intruding existing faults. The reefs can be in the form of either course conglomerates, rock pebbles and cemented in a silicate matrix. Pebbles usually derived from vein quarts, may also consist of quarzitic, chert jasper and quartz porphyry. The matrix consists of pure silica, but also contains minute flakes of muscovite and pyrophyllite as well as visible pyrite and other sulphides. The gold is usually confined to the matrix and tends to be concentrated along bedding planes (Vermeulen, 2001).
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
Analyte Method 8(µ) 10(2s) ± Unit
Au Pb Collection 1 81.20 6.3 g/t
U 4A_MICP 2 3490 214 ppm
U XRF 3 3535 281 ppm
C Combustion/LECO 4 7155 604 ppm
S 4A_MICP 3.96 0.19 %
S Combustion/LECO 3.96 0.37 %
LOI LOI 5 4.23 0.33 %
SG SG 6 2.82 0.11 Dimensionless
Ag 4A_MICP 9 2 ppm
Al 4A_MICP 1.24 0.12 %
As 4A_MICP 534 54 ppm
Ba 4A_MICP 71 5 ppm
Be 4A_MICP 1 0.2 ppm
Bi 4A_MICP 2 0.1 ppm
Ca 4A_MICP 543 112 ppm
Cd 4A_MICP 0.6 0.1 ppm
Ce 4A_MICP 114 15 ppm
Co 4A_MICP 204 13 ppm
Cs 4A_MICP 4 0.2 ppm
Cu 4A_MICP 157 13 ppm
Fe 4A_MICP 5.87 0.42 %
Fe FUS 7 5.84 0.44 %
Ga 4A_MICP 3 0.3 ppm
Hf 4A_MICP 26 2 ppm
In 4A_MICP 0.06 0.01 ppm
K 4A_MICP 1538 226 ppm
La 4A_MICP 59 7 ppm
Li 4A_MICP 42 2 ppm
Mn 4A_MICP 238 11 ppm
Mo 4A_MICP 3 0.3 ppm
Na 4A_MICP 658 76 ppm
Nb 4A_MICP 5 1 ppm
Ni 4A_MICP 378 34 ppm
P 4A_MICP 180 28 ppm
Pb 4A_MICP 1592 150 ppm
Rb 4A_MICP 10 0.9 ppm
Sb 4A_MICP 19 6 ppm
Sc 4A_MICP 8 0.6 ppm
Sn 4A_MICP 3 0.2 ppm
Sr 4A_MICP 21 2 ppm
Ta 4A_MICP 3 0.3 ppm
Te 4A_MICP 0.5 0.3 ppm
Th 4A_MICP 243 22 ppm
Ti 4A_MICP 891 124 ppm
Ti FUS 1272 85 ppm
Tl 4A_MICP 0.3 0.03 ppm
V 4A_MICP 22 4 ppm
W 4A_MICP 2 0.2 ppm
Y 4A_MICP 74 6 ppm
Zn 4A_MICP 205 21 ppm
