Description
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Recommended Concentrations and Limits
Certified Concentrations (at two Standard Deviations)
Au FA_GRAV 14.42 0.39 g/t
Au PA 14.39 1.1 g/t
Au Pb Collection 14.49 0.74 g/t
Ag 4A_MICP 2 0.1 ppm
Cu 4A_MICP 137 14 ppm
C Combustion/LECO 2.18 0.14 %
S Combustion/LECO 4.98 0.11 %
S 4A_MICP 4.73 0.037 %
Al 4A_MICP 4.95 0.18 %
Ba 4A_MICP 241 15 ppm
Be 4A_MICP 0.9 0.1 ppm
Bi 4A_MICP 0.3 0.03 ppm
Ca 4A_MICP 2.10 0.14 %
Cd 4A_MICP 13 0.3 ppm
Ce 4A_MICP 33 2 ppm
Co 4A_MICP 51 5 ppm
Cr 4A_MICP 651 105 ppm
Cs 4A_MICP 3 0.1 ppm
Fe 4A_MICP 10.01 0.28 %
Ga 4A_MICP 12 0.9 ppm
Hf 4A_MICP 2 0.4 ppm
In 4A_MICP 0.1 0.008 ppm
K 4A_MICP 1.86 0.20 %
La 4A_MICP 17 2 ppm
Li 4A_MICP 29 2 ppm
Mg 4A_MICP 2.54 0.11 %
Mn 4A_MICP 1639 134 ppm
Mo 4A_MICP 2 0.1 ppm
Na 4A_MICP 1475 108 ppm
Ni 4A_MICP 381 46 ppm
P 4A_MICP 267 26 ppm
Pb 4A_MICP 181 15 ppm
Rb 4A_MICP 75 5 ppm
Sb 4A_MICP 68 12 ppm
Sc 4A_MICP 14 2 ppm
Se 4A_MICP 2 0.8 ppm
Sn 4A_MICP 2 0.09 ppm
Sr 4A_MICP 57 5 ppm
Ta 4A_MICP 0.2 0.1 ppm
Te 4A_MICP 2 0.1 ppm
Th 4A_MICP 5 0.4 ppm
Tl 4A_MICP 0.5 0.03 ppm
U 4A_MICP 5 1 ppm
V 4A_MICP 93 7 ppm
W 4A_MICP 4 2 ppm
Y 4A_MICP 8 2 ppm
Zn 4A_MICP 422 49 ppm
Zr 4A_MICP 73 13 ppm
Major Oxides
Certified Concentrations (at two Standard Deviations)
Al2O3 XRF 9.48 0.20 %
CaO XRF 2.94 0.19 %
Cr2O3 XRF 0.11 0.01 %
Fe2O3 XRF 14.38 0.72 %
MgO XRF 4.46 0.18 %
Na2O XRF 0.19 0.04 %
SiO2 XRF 52.07 0.85 %
TiO2 XRF 0.45 0.08 %
Origin of Material
The material comes from a hydrothermal gold deposits 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 sulphides and gold mineralisation.
