Description
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AMIS0724 Au 2.38g/t Greenstone South Africa
Origin of Material
The material for AMIS0724 was sourced from the Archean Barberton Greenstone Belt in Mpumalanga Province, South Africa. Gold is contained in mesothermal veins associated with late tectonic shears and fractures within rocks of the Barberton Supergroup, which comprises an assortment of ultramafic and mafic submarine volcanics, turbiditic greywacke sandstones and shales. Intense shearing, massive quartz veining, silicification of BIF and sulphide enrichment characterize the larger ore bodies.
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
Analyte Method 7(µ) 9 ± (2s) Unit
Au 1Pb Collection 2.38 0.24 g/t
C 2Combustion/LECO 3.52 0.18 %
S 34A_MICP 4.03 0.36 %
S Combustion/LECO 4.30 0.20 %
SG 4SG 2.96 0.20 Dimensionless
Ag 4A_MICP 2 0.5 ppm
Al 4A_MICP 3.42 0.24 %
As 4A_MICP 2840 499 ppm
Ba 4A_MICP 82 6 ppm
Ba 5FUS 86 8 ppm
Be 4A_MICP 0.7 0.1 ppm
Bi 4A_MICP 0.3 0.03 ppm
Ca 4A_MICP 4.58 0.40 %
Cd 4A_MICP 39 6 ppm
Ce 4A_MICP 22 4 ppm
Ce FUS 22 0.8 ppm
Co 4A_MICP 42 4 ppm
Cr 4A_MICP 514 51 ppm
Cr FUS 571 48 ppm
Cs 4A_MICP 1 0.09 ppm
Cs FUS 1.0 0.1 ppm
Cu 4A_MICP 309 19 ppm
Dy 4A_MICP 2 0.3 ppm
Dy FUS 3 0.09 ppm
Er 4A_MICP 1 0.2 ppm
Er FUS 2 0.2 ppm
Eu 4A_MICP 1 0.07 ppm
Eu FUS 1 0.1 ppm
Fe 4A_MICP 11.72 1.1 %
Ga 4A_MICP 9 2 ppm
Ga FUS 10 0.7 ppm
Gd 4A_MICP 2 0.2 ppm
Gd FUS 3 0.3 ppm
Hf 4A_MICP 1 0.2 ppm
Hf FUS 2 0.4 ppm
In 4A_MICP 0.2 0.03 ppm
K 4A_MICP 5745 337 ppm
La 4A_MICP 11 2 ppm
La FUS 10 0.7 ppm
Li 4A_MICP 24 7 ppm
Mg 4A_MICP 2.28 0.15 %
Mn 4A_MICP 2696 162 ppm
Mo 4A_MICP 2 0.3 ppm
Na 4A_MICP 2230 175 ppm
Nd 4A_MICP 10 0.6 ppm
Nd FUS 11 0.7 ppm
Ni 4A_MICP 317 28 ppm
P 4A_MICP 294 29 ppm
Pb 4A_MICP 496 48 ppm
Pr 4A_MICP 3 0.1 ppm
Pr FUS 3 0.5 ppm
Rb 4A_MICP 21 2 ppm
Rb FUS 21 2 ppm
Sb 4A_MICP 163 28 ppm
Sb FUS 171 8 ppm
Sc 4A_MICP 10 1 ppm
Se 4A_MICP 3 0.9 ppm
Sm 4A_MICP 2 0.6 ppm
Sm FUS 2 0.1 ppm
Analyte Method 7(µ) 9± (2s) Unit
Sn 4A_MICP 2 0.2 ppm
Sr 4A_MICP 82 5 ppm
Sr FUS 83 2 ppm
Ta 4A_MICP 0.1 0.05 ppm
Te 4A_MICP 0.4 0.05 ppm
Th 4A_MICP 2 0.3 ppm
Th FUS 2 0.1 ppm
Tl 4A_MICP 0.3 0.04 ppm
U 4A_MICP 3 0.5 ppm
U FUS 3 0.5 ppm
V 4A_MICP 68 7 ppm
V FUS 74 6 ppm
W 4A_MICP 7 1 ppm
W FUS 11 1 ppm
Y 4A_MICP 7 1 ppm
Y FUS 17 0.7 ppm
Yb 4A_MICP 1 0.09 ppm
Yb FUS 2 0.1 ppm
Zn 4A_MICP 1135 52 ppm
Zr 4A_MICP 40 5 ppm
Zr FUS 61 3 ppm
