富铀花岗岩源岩特征

论述了华南陆壳的地层结构、岩性组合及其含铀性,各个构造旋回对铀的活化、迁移和富集作用.指出富铀花岗岩的源岩特征是:具有高硅、富铝、富钾的富铀陆壳.岩石组合主要以陆源泥砂质碎屑岩建造为主,夹中酸性、基性火山碎屑岩建造和碳酸盐岩建造等所组成的岩石.岩石经受了多次构造运动,使其发生不同程度的区域变质作用和混合岩化、花岗岩化,最终形成富铀花岗岩.

The source rock characters of U-rich granite

This paper discusses the stratum composition,lithological association,uranium content of crust and the activation,migration,concentration of uranium at each tectonic cycle in South China.The authors point out that the source rock of U-rich granite is U-rich continental crust which is rich in Si,Al and K.The lithological association is mainly composed of terrestrial clastic rocks formation of mudstone and sandstone,mingled with intermediate-acidic,mafic pyroclastic rocks and carbonate rocks formation.During tectonic movements,the rocks had undergone regional metamorphism,migmatitization,granitization,and formed U-rich granites finally.