本文研究了钾质碱性岩岩浆期后从早期交代作用到最晚期表生作用过程中放射性元素的性状。作者以钾质火山岩系中分布最广的侵入岩-霞石正长岩为例,对其未蚀变和经过热液蚀变的岩石中铀的分布状况进行了分析和对比,霞石正长岩中铀平均含量为10.3 ppm,钍为 In this paper, the traits of radioactive elements during the period from early metamorphism to the latest epigenetic effects after potassic alkaline magmatic magmatism were studied. Taking the nepheline syenite, the most widely distributed intrusive rock in the potassic volcanic series, as an example, the authors analyzed and compared the distribution of uranium in the unetched and hydrothermal altered rocks. The positive nepheline length Uranium rock average content of 10.3 ppm, thorium