A Preliminary Study on the Tectono-metallogenic Mechanism of the Tongshanling Region Zhang Xiangbing Metallogeny and Controls of the Tongshanling Polymetallic Deposit,Hunan Long Hanchun Analysis of Metallogenetic Structures of Han-Xing Type Iron Ore in Liguo Area Ye Jingren The Characteristics of the Cretaceous-Tertiary Sedimentary Formation and Associated Minerals in the Hengyang Diwa Basin Wang Fuquan Discussion on the Control and Transformation of the Coal Feilds by Diwa Tectonic Activities in Hengyang Diwa Basin and Its Southern Neighborhood Lin Ke Mineragenetic Characteristics of Polygenetic Compound Ore and Analysis of Mineralization-Enriching Factors of Tinpolymetallic Ore Deposit in Xianghualing,Hunan Li Zhichun