Metallogeny and prospectivity of the Dayaoshan Region, Guangxi Province, China

The Dayaoshan region is located in the Qinzhou-Qiantang link-belt between the Yangtze plate and the South China plate. Following multistage geological reworking, the resulting structural pattern gave rise to the Dayaoshan belt which was surrounded by several basins. Since 1949 exploration aimed at gold, tungsten-tin and lead-zinc, and special scientific research have focused on in this area. Following a multi-scale study of the tectonics in the Nanling area, the authors put forward a model that proposes a mantle-plume existed which had played an important role in the metallogeny of the region. On the basis of geology, geophysics and geochemistry, it is considered that gold is located in the centre of the plume region, with tungsten, tin, lead and zinc in Dayaoshan region surrounding the core. Mineralization displays a strong spatial and temporal relationship with the origin and evolution of granites in the region. These granites represent two cycles of mantle-plume activity, and are accompanied by Caledonian Au-Cu deposit series and Yanshanian REE-W-Sn-Pb-Zn deposit series