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Cr 31.98 % ultramafic Great Dyke Zimbabwe

Category: BASE METALS CONCENTRATE 
Product Code: AMIS 0591

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AMIS0591 Cr 31.98 % ultramafic Great Dyke Zimbabwe

Origin of Material

The material was sourced from African Chrome Field’s (ACF) alluvial chrome mining concessions located in the Great Dyke region of Mashonaland and Midlands provinces of Central Zimbabwe.
The Great Dyke is a layered mafic intrusion of igneous, metal-bearing rocks that was formed approximately 2.5 billion years ago. The chrome ores are located in seams along the flanks of the center part of the Great Dyke

Approximate Mineral and Chemical Composition

Chromite occurs to the base of the Ultramafic Sequence and is mined throughout the Great Dyke.

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

Analyte Method 5(µ) 8 ± (2s) Unit
Cr XRF 1 31.98 0.25 %
SG SG 2 4 0.2 Dimensionless
Al 4A_MICP 3 6.62 0.65 %
Al FUS 4 6.59 2.04 %
Ba 4A_MICP 17 4 ppm
Ce 4A_MICP 7 4 ppm
Cu 4A_MICP 8 1 ppm
Fe 4A_MICP 16.22 0.69 %
Hf 4A_MICP 0.9 0.3 ppm
La 4A_MICP 3 0.7 ppm
Li 4A_MICP 19 4 ppm
Mg FUS 4.93 2.67 %
Mn FUS 1982 173 ppm
Nb 4A_MICP 3 2 ppm
Ni 4A_MICP 648 86 ppm
Sb 4A_MICP 9 0.3 ppm
Sc 4A_MICP 3 0.9 ppm
Sn 4A_MICP 0.5 0.2 ppm
Ta 4A_MICP 0.2 0.1 ppm
Th 4A_MICP 2 0.4 ppm
U 4A_MICP 0.9 0.1 ppm
W 4A_MICP 0.2 0.6 ppm
Y 4A_MICP 1 0.2 ppm


Major Oxides
Certified Concentrations (at two Standard Deviations)

Analyte Method 5(µ) 8 ± (2s) Unit
Al2O3 FUS 12.43 4.00 %
Al2O3 XRF 12.85 0.12 %
Cr2O3 XRF 46.74 0.36 %
Fe2O3 XRF 23.66 0.17 %
MgO XRF 8.80 0.095 %
MnO FUS 0.256 0.022 %
MnO XRF 0.256 0.007 %
P2O5 XRF 0.010 0.001 %
SiO2 FUS 7.10 3.00 %
SiO2 XRF 7.02 0.050 %
TiO2 XRF 0.654 0.007 %
V2O5 XRF 0.191 0.018 %

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