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Re‐recognition of Tieshan “Syenite” and its Geological Significance in Zhenghe, Fujian Province

Tieshan Syenite crosses between Dongfeng and Zhangyuan’an in Zhenghe of Fujian province, occurs in the direction of 42°, Total length 8500m, width 600-800m and its Area of about 39km. Outcrops of the mass are located in the northeast and the southwest which is called Shizigang(Fig.1). Tieshan Syenite is important for us to study the indosinian tectonics and magmatism, and also Tieshan Cu-Pb-Zn deposit, phosphorus deposit, pyrite deposit, Dongfeng Copper deposit and Dongshan Pb-Zn deposit are scattered around the mass (Wang Qiang et al., 2005; He Zhenyu et al., 2010). Our study shows that Tieshan mass at Shizigang is an alkali feldspar metasomatic rock (Hu Shouxi, et al., 2004). The mass wrapped up many kinds of breccia which is composed of pyroxene diorite, tuff sandstone, granodiorite and granite. All the breccias and their cement rocks were metasomatized.