Description
DOWNLOAD AMIS CERTIFICATE (PDF)
AMIS0541Au 3.16g/t U 97ppm Wits South Africa
Origin of Material
This standard is made from uranium bearing gold ore originating from the Ventersdorp, Contact Reef, Carbon Leader Reef and Vaal Reef. The uranium bearing ore was blended with low grade material of similar matrix to obtain the required grade.
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 6Certified (µ) 8Two Standard Deviation (±2s) Unit
Au Pb Collection1 3.16 0.23 g/t
U XRF2 97 13 ppm
U3O8 XRF2 0.011 0.002 %
S Combustion/LECO5 0.55 0.05 %
SG SG3 2.70 0.10 Dimensionless
Ag 4A_MICP4 3 1 ppm
As 4A_MICP4 76 10 ppm
Ba 4A_MICP4 244 42 ppm
Be 4A_MICP4 1 0.1 ppm
Bi 4A_MICP4 1 0.2 ppm
Cd 4A_MICP4 0.1 0.05 ppm
Ce 4A_MICP4 41 11 ppm
Co 4A_MICP4 27 6 ppm
Cs 4A_MICP4 2 0.1 ppm
Cu 4A_MICP4 53 8 ppm
Fe 4A_MICP4 12753 1501 ppm
Ga 4A_MICP4 8 1 ppm
Hf 4A_MICP4 2 0.4 ppm
K 4A_MICP4 10879 977 ppm
La 4A_MICP4 21 5 ppm
Li 4A_MICP4 6 2 ppm
Lu 4A_MICP4 0.1 0.05 ppm
Mg 4A_MICP4 2873 325 ppm
Mn 4A_MICP4 130 9 ppm
Mo 4A_MICP4 4 0.4 ppm
Na 4A_MICP4 833 95 ppm
Nb 4A_MICP4 3 1 ppm
Ni 4A_MICP4 92 6 ppm
P 4A_MICP4 85 21 ppm
Pb 4A_MICP4 58 9 ppm
Rb 4A_MICP4 46 5 ppm
S 4A_MICP4 0.56 0.06 %
Sb 4A_MICP4 1 0.3 ppm
Sc 4A_MICP4 4 0.4 ppm
Sn 4A_MICP4 1 0.2 ppm
Sr 4A_MICP4 24 1.5 ppm
Tb 4A_MICP4 0.3 0.2 ppm
Te 4A_MICP4 0.4 0.2 ppm
Th 4A_MICP4 15 1 ppm
Tl 4A_MICP4 0.4 0.04 ppm
U 4A_MICP4 101 11 ppm
V 4A_MICP4 26 4 ppm
W 4A_MICP4 1 0.3 ppm
Y 4A_MICP4 8 2 ppm
Yb 4A_MICP4 1 0 ppm
Zn 4A_MICP4 34 4 ppm
