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Au 0.860 g/t Greenstone South Africa

Category: GOLD 
Product Code: AMIS 0570

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AMIS0570 Au 0.860 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 0.860 0.074 g/t
Cu 4A_MICP2 22 4 ppm
Ag 4A_MICP 0.2 0.1 ppm
SG SG3 2.81 0.11 Dimensionless
C Combustion/LECO4 2.32 0.19 %
LOI LOI5 9.45 0.38 %
S Combustion/LECO 0.100 0.012 %
S 4A_MICP 0.104 0.015 %
Al FUS6 4.64 0.086 %
Al 4A_MICP 4.68 0.12 %
As 4A_MICP 430 64 ppm
Ba 4A_MICP 230 18 ppm
Be 4A_MICP 0.8 0.2 ppm
Bi 4A_MICP 0.1 0.04 ppm
Ca 4A_MICP 1.91 0.13 %
Ce 4A_MICP 27 4 ppm
Co 4A_MICP 19 5 ppm
Cs 4A_MICP 3 0.1 ppm
Fe FUS 3.87 0.45 %
Fe 4A_MICP 3.96 0.27 %
Ga 4A_MICP 12 2 ppm
Hf 4A_MICP 2 0.2 ppm
In 4A_MICP 0.04 0.03 ppm
K 4A_MICP 1.93 0.12 %
K FUS 2.00 0.25 %
La 4A_MICP 13 3 ppm
Li 4A_MICP 18 3 ppm
Lu 4A_MICP 0.1 0.04 ppm
Mg 4A_MICP 3.16 0.16 %
Mg FUS 3.21 0.35 %
Mn 4A_MICP 1024 70 ppm
Mo 4A_MICP 0.9 0.14 ppm
Ni FUS 170 26 ppm
Ni 4A_MICP 179 36 ppm
P 4A_MICP 235 31 ppm
Pb 4A_MICP 6 1 ppm
Rb 4A_MICP 83 6 ppm
Sb 4A_MICP 10 0.8 ppm
Sc 4A_MICP 15 2 ppm
Sn 4A_MICP 1 0.3 ppm
Sr 4A_MICP 65 6 ppm
Ta 4A_MICP 0.3 0.0.2 ppm
Tb 4A_MICP 0.3 0.04 ppm
Th 4A_MICP 3 0.7 ppm
Ti FUS 2512 267 ppm
Tl 4A_MICP 0.4 0.08 ppm
U 4A_MICP 1 0.1 ppm
V 4A_MICP 96 7 ppm
Y 4A_MICP 7 0.6 ppm
Yb 4A_MICP 0.9 0.3 ppm
Zn 4A_MICP 54 8 ppm
Zr 4A_MICP 69 8 ppm

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