Description
DOWNLOAD AMIS CERTIFICATE (PDF)
Origin of Material
Samples are from the Black Reef found at the base of the Transvaal Supergroup. Both reef types are from the East Rand Basin in the Springs Gauteng vicinity.
Approximate Mineral and Chemical Composition
The Black Reef Batches are mostly silicates (siliceous quartzites and vein quartz pebbles) with a high pyrite content and minor micas. Pyrite (FeS2) content can be as high as 30%.
Summary Statistics
Recommended Concentrations and Limits (at two Standard Deviations) Certified Concentrations
Au Pb Collection 8.76 0.80 g/t
U 4A_MICP 107 12 ppm
U XRF 109 34 ppm
C Combustion/LECO 936 163 ppm
S Combustion/LECO 11.96 0.70 %
LOI LOI 10.10 0.39 %
SG SG 3.05 0.20 Dimensionless
Ag 74A_MICP 3 0.6 ppm
Al 4A_MICP 7297 261 ppm
As 4A_MICP 420 56 ppm
Ba 4A_MICP 40 4 ppm
Bi 4A_MICP 2 0.3 ppm
Ca 4A_MICP 386 72 ppm
Cd 4A_MICP 1 0.4 ppm
Ce 4A_MICP 18 2 ppm
Co 4A_MICP 137 26 ppm
Cr XRF 1233 54 ppm
Cs 4A_MICP 0.9 0.07 ppm
Cu 4A_MICP 56 12 ppm
Fe 4A_MICP 11.43 0.54 %
Hf 4A_MICP 2 0.4 ppm
K 4A_MICP 1765 194 ppm
La 4A_MICP 9 0.9 ppm
Li 4A_MICP 9 2 ppm
Mg 4A_MICP 1331 86 ppm
Mn 4A_MICP 223 7 ppm
Mo 4A_MICP 3 0.8 ppm
Na 4A_MICP 288 54 ppm
Nb 4A_MICP 108 18 ppm
Ni 4A_MICP 289 15 ppm
Pb 4A_MICP 139 17 ppm
Rb 4A_MICP 8 1 ppm
Sb 4A_MICP 11 4 ppm
Sc 4A_MICP 2 0.6 ppm
Sr 4A_MICP 14 1 ppm
Te 4A_MICP 0.4 0.1 ppm
Th 4A_MICP 7 1 ppm
Tl 4A_MICP 0.8 0.05 ppm
W 4A_MICP 2 0.7 ppm
Y 4A_MICP 6 0.6 ppm
Zn 4A_MICP 267 23 ppm
Zr 4A_MICP 84 14 ppm
Major Oxides Certified Concentrations (at two Standard Deviations)
U3O8 4A_MICP 0.013 0.001 %
Al2O3 XRF 1.42 0.026 %
CaO XRF 0.057 0.01 %
Cr2O3 XRF 0.18 0.008 %
K2O XRF 0.22 0.01 %
SiO2 XRF 71.74 2.2 %
TiO2 XRF 0.10 0.02 %
