摘要
软弱夹层泥化是水利水电工程建设中经常遇到的工程地质问题,以往的论述多偏重构造成因,本文以三个工程实例的资料,研究了地下水作用下软弱夹层泥化的机理.结果丧明:在水岩系列间水文地球化学作用过程中,易溶和难溶的物质依次被迁移,因而那些含易溶盐的或钙质胶结的粘土岩最易形成泥化夹层;环境变迁加速或推迟了泥化作用的进程;泥化层中粘土矿物成分和特征反映了地下水迳流条件和水岩间相互作用的时间尺度.
Sandwiches occuring in magatite and sedimentary or metamorphic rocks can be divied into two main types i.e. original and secondary according to their geogeneses. This paper places emphasis on the study of argillization of the secondary one. Analysis of the data from three dam sites in South China, shows that the argillization of the sandwiches results from the hydrogeochemical action between rocks and the water in them. In this process, diffluent salt and indiffluent salt are migrated out of the sandwiches in order, as a result, the sandwiches containing diffluent salt or calcareous cement are most easily argillizated.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1991年第1期73-78,共6页
Journal of Hohai University(Natural Sciences)
关键词
软弱夹层
泥化
地下水
地球化学
sandwich
argillization
ground water
geochemistry
