Description
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Summary Statistics
Recommended Concentrations and Limits
(at two Standard Deviations) Certified Concentrations
Au CL 2.54 0.35 g/t
Au PA 5.01 0.34 g/t
Au Pb Collection 4.66 0.77 g/t
Cu 4A_MICP 322 72 ppm
S 4A_MICP 4.02 0.30 %
S Combustion/LECO 4.07 0.31 %
C Combustion/LECO 3.65 0.052 %
Ag 4A_MICP 2 0.3 ppm
Al 4A_MICP 3.99 0.16 %
Ba 4A_MICP 113 5 ppm
Ca 4A_MICP 4.57 0.20 %
Cr 4A_MICP 543 122 ppm
K 4A_MICP 8937 417 ppm
Mg 4A_MICP 2.51 0.083 %
Na 4A_MICP 2235 205 ppm
Ni 4A_MICP 352 66 ppm
Pb 4A_MICP 434 95 ppm
Sr 4A_MICP 87 15 ppm
V 4A_MICP 78 7 ppm
Zn 4A_MICP 1080 102 ppm
Zr 4A_MICP 52 6 ppm
Major Oxides
Certified Concentrations (at two Standard Deviations)
Al2O3 XRF 7.63 0.12 %
CaO XRF 6.53 0.069 %
Fe2O3 XRF 17.11 0.28 %
K2O XRF 1.07 0.045 %
MgO XRF 4.30 0.20 %
MnO XRF 0.37 0.01 %
SiO2 XRF 46.56 0.60 %
TiO2 XRF 0.28 0.03 %
Origin of Material
The material comes from a hydrothermal gold deposit 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.
