宁国—旌德一带有大量花岗岩分布,岩石类型较简单,主要为花岗闪长岩,少量似斑状花岗闪长岩和似斑状二长花岗岩。锆石U-Pb年龄显示花岗岩为燕山早期侵入的产物。岩石化学、地球化学表明,岩石为高钾钙碱性系列岩石,由部分熔融作用形成,源岩以壳源物质为主。花岗岩的形成可能与太平洋板块向欧亚大陆板块俯冲作用有关。 Ningguo - Jingde a large number of granite distribution, the rock type is relatively simple, mainly granodiorite, a small amount of like porphyritic granodiorite and mackerel-like granite. Zircon U-Pb age shows that granite is the product of early intrusion of Yanshan. Petrochemistry and geochemistry show that the rock is a series of high-K calc-alkaline rocks formed by partial melting, and the source rocks are dominated by crustal materials. The formation of granite may be related to the subduction of Pacific plate to Eurasia plate.