Abstract:The intermediate-basic volcanic rock in Dachang Heishuigou area of Guangxi is basalt and andesite rocks, mostly of which belong to sub-alkaline basalt series and a flow basic series. The geochemistry characteristics indicate that the volcanic rocks maybe formed in an island-arc environment. In Dachang area, traditional granite mineralization occur in late-Yanshanian period, and the mafic submarine volcanic and sedimentary-exhalative mineralization and submarine exhalative hot water - the role of sedimentary mineralization occur in the early Hercynian period.