Journal of Engineering Research

The Tangjiawan Tin Polymetallic Deposit in Chahexian, Huili County, Sichuan Province, is located in the middle section of the Kangdian geosyncline along the western margin of the Yangtze Platform, representing one of the key tin polymetallic ore deposits in the Panxi region. This study comprehensively investigates the geological characteristics and exploration directions of the deposit through field geological surveys and laboratory analyses of rock and mineral samples. Results indicate that the deposit is hosted in the shallow metamorphic clastic-carbonate strata of the Tianbaoshan Formation within the Huili Group of the Middle Proterozoic, with significant control from northeast-trending fault structures. The mineralization type is predominantly stibnite-sulfide, with ore minerals including stibnite, pyrite, sphalerite, and galena, while gangue minerals mainly consist of quartz and calcite. Based on regional metallogenic patterns and geological features, the deposit is classified as a medium-low temperature hydrothermal filling alteration-type. Exploration priorities should focus on northeast-trending fault zones, adjacent secondary faults, favorable lithologic assemblages in strata, and geochemical anomaly concentration centers, providing scientific guidance for future mineral exploration efforts in the area.

Huili County; Tangjiawan tin polymetallic deposit; Geological characteristics; Prospecting direction