摘要
根据野外实地调查和构造解析方法,对叶巴滩坝区发育程度不同的七组节理划分为NW向构造期的两组共轭节理和属SN向构造期的两组共轭节理。该区节理为"金沙江洋盆"在经历消减封闭的印支期、中新生代的燕山碰撞期和喜马拉雅陆内裂谷阶段后发育形成的。原生层节理与陡倾构造节理同时发育并相互交织,造成岩体显著破碎,影响着该区工程的稳定性。
Joints in the dam area of the Yebatan Hydropower station may be divided into 7 groups belonging to NW-trending and longitudinal structures. They were formed during Indo-Chinese epoch, Yanshanian epoch and Himalayan epoch, respectively. Their development has influence on engineering stability.
出处
《四川地质学报》
2009年第4期449-451,454,共4页
Acta Geologica Sichuan
关键词
共轭节理
工程稳定性
金沙江叶巴滩
Jinsha River
Yebatan dam area
conjugate joints
engineering stability
