Description
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Origin of Material
The material for this standard comes from the Yaramoko Gold Mine, located 200km southwest of Ouagadougou, Burkina Faso. The deposit occurs within the Paleoproterozoic Birimian greenstone belt.
Approximate Mineral and Chemical Composition
Mineralisation is synchronous with regional metamorphism and deformation. The gold found here is typical late orogenic hydrothermal deposit. Gold mineralisation is associated with a network of quartz veins containing subordinate amounts of carbonate, tourmaline, sulphides and native gold.
Recommended Concentrations and Limits
Certified Concentrations (at two Standard Deviations)
Au Pb Collection 1.20 0.17 g/t
Au FA_GRAV 1.18 0.22 g/t
Au CL 1.12 0.088 g/t
Cu 4A_MICP 70 7 ppm
Cu 2A_MICP 66 13 ppm
C Combustion/LECO 1.23 0.18 %
S Combustion/LECO 0.37 0.05 %
S 4A_MICP 0.38 0.05 %
S 2A_MICP 0.36 0.04 %
Ag 2A_MICP 0.2 0.06 ppm
Ag 4A_MICP 0.2 0.1 ppm
Al 4A_MICP 6.79 0.36 %
As 2A_MICP 5 0.3 ppm
As 4A_MICP 8 3 ppm
Ba 4A_MICP 301 9 ppm
Be 4A_MICP 1 0.06 ppm
Bi 2A_MICP 0.4 0.02 ppm
Bi 4A_MICP 0.4 0.02 ppm
Ca 2A_MICP 2.59 0.18 %
Ca 4A_MICP 2.89 0.22 %
Cd 2A_MICP 0.07 0.01 ppm
Cd 4A_MICP 0.09 0.02 ppm
Ce 4A_MICP 33 9 ppm
Co 4A_MICP 20 5 ppm
Cr 4A_MICP 134 31 ppm
Fe 4A_MICP 4.32 0.12 %
Ga 4A_MICP 19 5 ppm
K 4A_MICP 1.47 0.12 %
La 4A_MICP 18 3 ppm
Li 2A_MICP 18 3 ppm
Li 4A_MICP 21 2 ppm
Mg 4A_MICP 1.61 0.22 %
Mn 2A_MICP 683 27 ppm
Mn 4A_MICP 743 33 ppm
Mo 2A_MICP 1 0.8 ppm
Na 2A_MICP 1313 246 ppm
Nb 4A_MICP 7 0.8 ppm
Ni 2A_MICP 74 4 ppm
Ni 4A_MICP 79 8 ppm
P 2A_MICP 405 32 ppm
P 4A_MICP 422 37 ppm
Pb 2A_MICP 4 0.2 ppm
Pb 4A_MICP 5 2 ppm
Sb 2A_MICP 0.2 0.05 ppm
Sc 2A_MICP 7 1 ppm
Sc 4A_MICP 13 1 ppm
Sr 2A_MICP 61 5 ppm
Sr 4A_MICP 150 11 ppm
Th 4A_MICP 3 0.4 ppm
Ti 4A_MICP 3489 364 ppm
Tl 4A_MICP 0.2 0.04 ppm
U 4A_MICP 1 0.1 ppm
V 4A_MICP 115 12 ppm
W 2A_MICP 36 7 ppm
W 4A_MICP 59 6 ppm
Y 4A_MICP 12 2 ppm
Zn 2A_MICP 61 6 ppm
Zn 4A_MICP 70 7 ppm
Zr 2A_MICP 3 0.3 ppm
Major Oxides
Certified Concentrations (at two Standard Deviations)
Al2O3 XRF 12.97 0.21 %
CaO XRF 3.97 0.080 %
Fe2O3 XRF 6.27 0.14 %
K2O XRF 1.76 0.034 %
MgO XRF 2.74 0.078 %
MnO XRF 0.098 0.009 %
Na2O XRF 3.61 0.15 %
P2O5 XRF 0.096 0.01 %
SiO2 XRF 61.42 0.71 %
SO3 XRF 0.93 0.02 %
TiO2 XRF 0.66 0.02 %
