Origin of Material: This material was supplied by the open pit Buzwagi Gold and Copper Mine, hosted in the Nzega Greenstone Belt in the Shinyanga Region of Tanzania, 6 kilometres southeast from the town of Kahama. The mine is operated by African Barrick Gold. The material supplied was described as “rougher feed”.
Approximate Mineral and Chemical Composition: The Nzega Belt is comprised of basalts and intermediate volcanics intruded by granitoid masses. Buzwagi is a shear hosted quartz-veined deposit, hosted in porphyritic granite. Gold mineralisation occurs in association with sulphides (pyrite) and quartz and as free grains, while copper mineralisation occurs as primary sulphides (chalcopyrite).
Recommended Concentrations and Limits
(at two Standard Deviations)
Cu F 1400 ± 85 ppm
Cu M/ICP 1399 ± 81 ppm
Au Pb Collection 1.03 ± 0.04 g/t
Specific Gravity 2.81 ± 0.06