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 11.16 0.87 g/t
Au FA_GRAV 11.58 0.38 g/t
Au CL 8.84 1.0 g/t
S 4A_MICP 1.47 0.068 %
S Combustion/LECO 1.43 0.042 %
Ag 4A_MICP 0.8 0.2 ppm
As 4A_MICP 3552 324 ppm
Cu 4A_MICP 72 15 ppm
C Combustion/LECO 1.82 0.076 %
SG SG 2.89 0.29 Dimensionless
Al 4A_MICP 4.14 0.12 %
Ba 4A_MICP 138 10 ppm
Be 4A_MICP 0.9 0.1 ppm
Ca 4A_MICP 2.93 0.30 %
Ce 4A_MICP 13 0.6 ppm
Co 4A_MICP 54 3 ppm
Fe 4A_MICP 4.51 0.13 %
Ga 4A_MICP 9 1 ppm
K 4A_MICP 1.50 0.083 %
Li 4A_MICP 59 16 ppm
Mg 4A_MICP 3.56 0.20 %
Mn 4A_MICP 990 44 ppm
Mo 4A_MICP 5 0.4 ppm
Na 4A_MICP 2762 101 ppm
Ni 4A_MICP 419 34 ppm
P 4A_MICP 137 11 ppm
Pb 4A_MICP 25 4 ppm
Rb 4A_MICP 76 4 ppm
Sc 4A_MICP 20 2 ppm
Sr 4A_MICP 60 6 ppm
Ta 4A_MICP 0.6 0.2 ppm
V 4A_MICP 124 7 ppm
W 4A_MICP 9 2 ppm
Y 4A_MICP 6 1 ppm
Zn 4A_MICP 86 16 ppm
Zr 4A_MICP 34 2 ppm
Major Oxides
Certified Concentrations (at two Standard Deviations)
Al2O3 XRF 7.75 0.11 %
CaO XRF 4.11 0.064 %
Fe2O3 XRF 6.44 0.11 %
K2O XRF 1.71 0.038 %
MgO XRF 5.99 0.077 %
Na2O XRF 0.36 0.02 %
P2O5 XRF 0.031 0.003 %
SiO2 XRF 62.83 1.4 %
TiO2 XRF 0.32 0.01 %
