Origin of placer gold occurrences in the vicinity of Glucholazy, SW Poland

摘要

The morphologies and chemical composition of gold particles suggest that the placer gold was derived from several potential sources. The most significant gold source was the sedimentary and epimetamorphic cover of the Zulova granitoids which were eroded and removed during the Neogene. The homogeneous, porous, gold particles were formed in the weathering zones of polymetallic veins and other types of mineralization. Some porous gold particles, without any signs of mechanical abrasion, may have been formed post-depositionally as a result of precipitation from colloidal solutions.