Description
DOWNLOAD AMIS CERTIFICATE (PDF)
Origin of Material
The material comes from a hydrothermal gold deposit in the Barberton Greenstone Belt. Greenstone belts are zones of variably metamorphosed mafic to ultramafic volcanic sequences with associate sedimentary rocks that occur within Archaean and Proterozoic cratons between granite and gneiss bodies. Greenstone belts are primarily formed of volcanic rocks, dominated by basalt, with minor sedimentary rocks inter-leaving the volcanic formations.
Approximate Mineral and Chemical Composition
The mineral assemblages of the samples are rich in greenschists and associated minerals. Greenschists is a generic name of minerals formed by regional metamorphism of mafic igneous rocks under the relatively low temperatures and pressures. The name greenstone originates from commonly having an abundance of green minerals such as chlorite/chamosite, Actinolite/ and amphiboles and sheets-like minerals such as biotite/muscovite. The common minerals associated with greenschists include quartz, orthoclase, and calcite. The greenschists minerals are generally the pathfinders/ indicative of base metal sulphide and gold mineralization.
Summary Statistics
Recommended Concentrations and Limits (at two Standard Deviations)
Certified Concentrations
Au Pb Collection 4.80 0.47 g/t
Au FA_GRAV 4.87 0.60 g/t
Au CL 3.84 0.56 g/t
S Combustion/LECO 1.31 0.046 %
S 4A_MICP 1.31 0.028 %
Ag 4A_MICP 0.5 0.2 ppm
As 4A_MICP 2823 251 ppm
Cu 4A_MICP 79 6 ppm
C Combustion/LECO 1.47 0.13 %
LOI LOI 7.91 0.71 %
SG SG 2.93 0.23 Dimensionless
Al 4A_MICP 4.81 0.24 %
Ba 4A_MICP 169 9 ppm
Be 4A_MICP 1 0.1 ppm
Bi 4A_MICP 2 0.1 ppm
Ca 4A_MICP 2.71 0.14 %
Cd 4A_MICP 0.2 0.02 ppm
Ce 4A_MICP 18 0.7 ppm
Co 4A_MICP 50 3 ppm
Cs 4A_MICP 43 1 ppm
Fe 4A_MICP 5.42 0.10 %
Ga 4A_MICP 10 0.7 ppm
In 4A_MICP 0.04 0.003 ppm
K 4A_MICP 1.65 0.084 %
La 4A_MICP 10 0.8 ppm
Li 4A_MICP 112 11 ppm
Mg 4A_MICP 4.52 0.16 %
Mn 4A_MICP 1069 81 ppm
Mo 4A_MICP 3 0.3 ppm
Na 4A_MICP 5258 93 ppm
Nb 4A_MICP 3 1 ppm
Ni 4A_MICP 397 26 ppm
P 4A_MICP 204 11 ppm
Pb 4A_MICP 22 0.9 ppm
Rb 4A_MICP 95 6 ppm
Sb 4A_MICP 54 16 ppm
Sc 4A_MICP 20 0.4 ppm
Sn 4A_MICP 2 1 ppm
Sr 4A_MICP 73 8 ppm
Ta 4A_MICP 1 0.2 ppm
Th 4A_MICP 3 0.3 ppm
Ti 4A_MICP 1771 364 ppm
Tl 4A_MICP 0.6 0.05 ppm
V 4A_MICP 130 11 ppm
W 4A_MICP 9 2 ppm
Y 4A_MICP 9 1 ppm
Zn 4A_MICP 87 6 ppm
Zr 4A_MICP 49 3 ppm
Major Oxides
Certified Concentrations (at two Standard Deviations)
Al2O3 XRF 9.09 0.16 %
CaO XRF 3.80 0.061 %
Cr2O3 XRF 0.20 0.03 %
Fe2O3 XRF 7.67 0.26 %
K2O XRF 1.98 0.036 %
MgO XRF 7.55 0.079 %
MnO XRF 0.14 0.01 %
Na2O XRF 0.70 0.04 %
SiO2 XRF 59.48 1.5 %
TiO2 XRF 0.40 0.004 %