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Au 0.121g/t Cu 65ppm Quartz-Carbonate Namibia

Category: GOLD 
Product Code: AMIS 0642

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AMIS0642 Au 0.121g/t Cu 65ppm Quartz-Carbonate Namibia

Origin of Material

The material for this standard was sourced from the Otjikoto Gold Mine owned by B2Gold Namibia (13). The Otjikoto Gold deposit is located within the Damara Mobile Belt, which forms part of the Pan-African Mobile Belt system. The Otjikoto Gold mine is located about 300 km north of Windhoek, in Otjozondjupa province, in Namibia.

Approximate Mineral and Chemical Composition

The Otjikoto project is located within the Neoproterozoic Damara mobile belt, which forms part of the Pan–African mobile belt system. The deposit falls under the general classification of an orogenic gold deposit and occurs in a similar stratigraphic position as the Navachab gold mine deposit. The Otjikoto deposit lithology has been divided into three principal mineralized lithostratigraphic units, from top to base, the OTC, OTB, and OTA . The OTC albitite-hornfels unit hosts most of the mineralised vein system and is underlain by a distinct marker horizon, the unmineralised OTB calcitic marble.
Gold in the main Otjikoto deposit is hosted by a north-north-east-striking sheeted sulphide (+ magnetite) –quartz and carbonate vein system. Gold occurs within the vein system as coarse native gold with a size variation from 5microns to 4000 microns. It occurs adjacent to and within sulphides, garnets on the edges of amphiboles and chlorite, as free gold in quartz and carbonates.

Analyte Method Certified (µ)8 (2s)10 ± Unit
Au Pb Collection1 0.121 0.023 g/t
Pd Pb Collection 0.019 0.0014 g/t
C Combustion/LECO2 3.04 0.14 %
S Combustion/LECO 1.16 0.079 %
S 4A_MICP3 1.18 0.15 %
LOI LOI4 9.52 0.96 %
SG SG5 2.78 0.13 Dimensionless
Al FUS6 6.55 0.19 %
As 4A_MICP 33 4 ppm
Ba 4A_MICP 30 8 ppm
Be 4A_MICP 0.6 0.1 ppm
Bi 4A_MICP 0.2 0.04 ppm
Ca 4A_MICP 6.21 0.32 %
Co 4A_MICP 17 6 ppm
Cr 4A_MICP 122 11 ppm
Cr FUS 155 14 ppm
Cs 4A_MICP 1 0.2 ppm
Cu 4A_MICP 65 16 ppm
Fe 4A_MICP 4.93 0.28 %
Fe FUS 4.98 0.13 %
Hf 4A_MICP 3 0.9 ppm
K 4A_MICP 1532 137 ppm
La 4A_MICP 31 8 ppm
Li 4A_MICP 9 1 ppm
Mg 4A_MICP 1.78 0.031 %
Mg FUS 1.94 0.055 %
Mn 4A_MICP 1193 87 ppm
Mn FUS 1267 68 ppm
Na 4A_MICP 4.76 0.29 %
Ni 4A_MICP 48 8 ppm
P 4A_MICP 712 47 ppm
Pb 4A_MICP 17 4 ppm
Rb 4A_MICP 9 0.7 ppm
Sb 4A_MICP 2 0.3 ppm
Si FUS 23.78 0.78 %
Sr 4A_MICP 108 14 ppm
Ta 4A_MICP 0.7 0.09 ppm
Th 4A_MICP 9 0.8 ppm
Ti 4A_MICP 3652 211 ppm
Ti FUS 3908 396 ppm
U 4A_MICP 4 0.3 ppm
V 4A_MICP 136 17 ppm
Y 4A_MICP 20 5 ppm
Zn 4A_MICP 47 4 ppm
Zr 4A_MICP 115 18 ppm

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