Abstract:

Through field geological survey，the microscopic identification and the comprehensive study of ore deposits with previous materials，the Chadong silver polymetallic ore deposit geological characteristics，ore fabric，mineral composition，metallogenic period and phase analysis were summarized，and the metallogenic process was discussed preliminarily.The results demonstrated that the ore deposit was mainly with disseminated ore，vein，net vein and block structure，moreover，the structure was primarily composed with  idiomorphic-hypidiomorphic granular，irregular granular as well as metasomatic structure.Mineral composition was given priority to oxide and sulfur compounds，meanwhile，mineral assemblage was with silver （gold）-lead and zinc series，and primarily with sulfide.Additionally，on behalf of the minerals were pyrite，arsenopyrite，galena and silver minerals，etc. In mineral assemblage was characterized by low temperature mineral assemblage characteristics，and metallogenic temperature mainly in low temperature.Overall，metallogenic process has the characteristics of period and stage，including gas-water hydrothermal mineralization period as the main metallogenic period，which can be further divided into quartz-sulfide stage and carbonate rock-lead and zinc sulfide phase.The Chadong silver gold deposit was low temperature type deposit that formed under the action of a fluid medium，such as strata as well as structure，and magmatic rocks.

Key words: silver polymetallic deposit, geological characteristics, ore-forming process, Chadong silver mine, Guangdong Province