Description
DOWNLOAD AMIS CERTIFICATE (PDF)
Origin of Material
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. The material comes from the Greenstone belt in Barberton.
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 sulphides and gold mineralisation.
Certified Concentrations
Au Pb Collection 0.370 0.04 g/t
Cu 4A_MICP 218 8 ppm
C Combustion/LECO 7093 139 ppm
S Combustion/LECO 0.48 0.03 %
LOI LOI 3.34 0.42 %
S 4A_MICP 0.50 0.05 %
Al 4A_MICP 7.23 0.44 %
Ba 4A_MICP 644 34 ppm
Be 4A_MICP 5 0.9 ppm
Ca 4A_MICP 4.44 0.23 %
Ce 4A_MICP 66 14 ppm
Co 4A_MICP 17 4 ppm
Cr 4A_MICP 288 63 ppm
Fe 4A_MICP 5.00 0.29 %
K 4A_MICP 3.24 0.060 %
La 4A_MICP 33 2 ppm
Li 4A_MICP 179 4 ppm
Mg 4A_MICP 2.39 0.24 %
Mn 4A_MICP 2152 279 ppm
Mo 4A_MICP 4 0.3 ppm
Na 4A_MICP 7339 456 ppm
Nb 4A_MICP 15 0.5 ppm
Ni 4A_MICP 73 4 ppm
P 4A_MICP 991 28 ppm
Pb 4A_MICP 12 2 ppm
Sc 4A_MICP 16 0.9 ppm
Sr 4A_MICP 258 25 ppm
Ti 4A_MICP 4664 141 ppm
V 4A_MICP 162 7 ppm
Zn 4A_MICP 63 2 ppm
Zr 4A_MICP 125 21 ppm
Major Oxides
Al2O3 XRF 13.84 0.20 %
CaO XRF 6.36 0.16 %
Fe2O3 XRF 7.22 0.10 %
K2O XRF 4.12 0.13 %
MgO XRF 4.05 0.12 %
MnO XRF 0.28 0.04 %
Na2O XRF 1.00 0.081 %
SiO2 XRF 57.73 0.54 %
TiO2 XRF 0.79 0.02 %
