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Au 0.271 g/t Greenstone South Africa

Category: GOLD 
Product Code: AMIS 0569

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AMIS0569 Au 0.271 g/t Greenstone South Africa

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.


Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations

Analyte Method 8 (µ) 10 ± (2s) Unit

Au Pb Collection1 0.271 0.031 g/t
Cu 4A_MICP2 20 3 ppm
LOI LOI3 8.73 0.18 %
C Combustion/LECO4 2.19 0.15 %
SG SG5 3 0.3 Dimensionless
Al 4A_MICP 3.66 0.26 %
Al FUS6 3.60 0.22 %
As 4A_MICP 191 15 ppm
Ba 4A_MICP 228 20 ppm
Be 4A_MICP 1 0.2 ppm
Ca 4A_MICP 1.72 0.12 %
Ca FUS 1.65 0.22 %
Cd 4A_MICP 0.1 0.05 ppm
Ce 4A_MICP 16 3 ppm
Co 4A_MICP 17 4 ppm
Cr FUS 1457 252 ppm
Cs 4A_MICP 2 0.2 ppm
Fe 4A_MICP 2.99 0.20 %
Ga 4A_MICP 9 2 ppm
Hf 4A_MICP 1 0.1 ppm
In 4A_MICP 0.04 0.03 ppm
K 4A_MICP 1.59 0.12 %
La 4A_MICP 8 1 ppm
Li 4A_MICP 13 3 ppm
Mg 4A_MICP 3.03 0.14 %
Mg FUS 3.02 0.26 %
Mn 4A_MICP 926 88 ppm
Mo 4A_MICP 1 0.2 ppm
Na 4A_MICP 2688 517 ppm
Nb 4A_MICP 2 0.8 ppm
Ni 4A_MICP 162 34 ppm
P 4A_MICP 155 29 ppm
Pb 4A_MICP 12 2 ppm
Rb 4A_MICP 62 5 ppm
Sb 4A_MICP 14 2 ppm
Sc 4A_MICP 17 2 ppm
Sr 4A_MICP 53 7 ppm
Ta 4A_MICP 0.2 0.1 ppm
Th 4A_MICP 2 0.5 ppm
Ti FUS 1938 189 ppm
Tl 4A_MICP 0.3 0.04 ppm
U 4A_MICP 1 0.1 ppm
V 4A_MICP 132 11 ppm
W 4A_MICP 2 1 ppm
Y 4A_MICP 5 1 ppm
Yb 4A_MICP 1 0.1 ppm
Zn 4A_MICP 64 14 ppm
Zr 4A_MICP 40 8 ppm

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