Geochemical constraints from hydrothermal fluid inclusions of altered deformation zone type Au(Ag) deposits in Yunkai area, South China

摘要

The altered deofmration zone type Au (Ag) deposits share an important part from the precious metallic ore deposits in the Yunkai area, South Cina. Their formation is a history of poly-stage evolution. Preliminary source strata, Calidoniam metamorphism, Indosinian-Yanshanian ductile shear deformation and associated hydrothermal alteration all play certain roles in the history. This note discusses the geochemical conditional of the hydrothermal fluids during mineralization.