METALLOGENY APPLIED TO GOLD RECOVERY AT SOUTHERN BOLÍVAR GOLD DISTRICT - COLOMBIA AND ITS ENVIRONMENTAL IMPLICATIONS
Petrographic, metallographic, electron microprobe and x-ray diffraction analysis, were performed to characterize properly the mineralization present in the sectors of Culoalzao and San Pedro Frío, obtaining a detailed panorama of the deposit from the compositional and textural outlook. The deposit consist mainly of sulfides (pyrite, pyrite+As, chalcopyrite, sphalerite, galena, arsenopyrite), tellurides (hessite, petzite) and oxides in a sectorized way. In addition, the presence of important gold content was reported, both native and electrum. It was also possible to observe the occurrence of compositional, textural and abundance variations in the two sectors studied.
The understanding of the mineralogy present in the deposit allowed to make a better approximation to adequate recovery techniques to extract the largest amount of gold given its distribution and the technological availability of the artisanal miners. Moreover, this results will lead to an improvement in the environmental issues related to the mining processes.