Study of Metallogenetic Fluids and Metallogenic Mechanisms of Xingyuanchong Copper Deposit, Jiangxi Province, China

Xingyuanchong copper deposit at Wanzai, Jiangxi, is located in the west section of Yifeng-Jingdezhen deep faults- Huangmao area. By studying the fluid inclusions, and integrating the metallogenic features and sulfur isotope compositions of the ore deposit, the source of metallogenic fluids and metallogenic mechanisms can be studied. The study of fluid inclusions indicates that the deposit was controlled by fluids from at least two different sources: δ34S data indicates sulfur was characterized by submarine exhalation sedimentation and late-stage hydrothermal superimposition. Thus, combining the above geochemical characteristics and the geological setting, it is proposed that the metallogenic fluids of the deposit were extrusive gas-hydrothermal fluids, seawater, and later magmatic hydrothermal fluids. The mineralizing processes can be divided into two stages: first, submarine volcanic sediments or a proto-ore layer formed in the Mesoproterozoic; second, the pre-existing proto-ore was diplogenetically altered by the hydrothermal fluids and dynamic metamorphism mainly derived from the Jinning orogenic period in Late Proterozoic.