黔南下寒武统喳拉沟组黑色岩层风化特征  

Weathering characteristics of black rock strata from Lower Cambrian Zhalagou Formation in Sandu,Guizhou,China

作　　者：李晓宁[1,2] 朱宝龙[1] 廖昕[2] 李季伟[2] 凌斯祥[2] 巫锡勇 

机构地区：[1]西南科技大学土木与建筑工程学院,四川绵阳621010 [2]西南交通大学地球科学与环境工程学院,成都610031

出　　处：《成都理工大学学报（自然科学版）》2013年第5期603-608,共6页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(41172261);四川省科技支撑计划项目(2012SZ0051)

摘　　要：黑色岩层是一种广泛分布且具有特殊性质的岩石,探讨黑色岩层的风化特征,为黑色岩层边坡治理提供理论依据。选取黔南三都地区下寒武统喳拉沟组黑色岩层为研究对象,利用浸泡试验、水质分析试验模拟黑色岩层的水岩化学作用过程,通过黑色岩层风化中的矿物特征、化学成分特征来确定其风化阶段。研究结果表明:研究区黑色岩层在水岩作用中涉及多个复杂的化学过程,通过溶解、水解、水合作用逐步形成稳定的黏土矿物及次生矿物;黑色岩层的化学风化已完成去Na、Ca阶段,并初步进入中期的去K风化阶段。The black strata are widely distributed and have special properties. Selecting the black strata of I.ower Cambrian Zhalagou Formation in South Guizhou to be the object of study, this paper determines the weathering stage of black strata by the characteristics of the minerals and chemical composition of the black strata in the weathering, and simulates the chemism of water and rock by immersion test and water quality analysis test to provide the reference for the future study. The findings indicate that the chemical weathering of the black strata has been completed the stage to remove Na and Ca and enters into the middle stage to remove K. The black strata involves more complex chemical processes in the water and rock chemism, gradually forms stable clay minerals and secondary minerals by the dissolution, hydrolysis, and hydration.

关 键 词：黑色岩层 喳拉沟组 矿物特征 浸泡试验 风化特征 

分 类 号：P512.1[天文地球—地质学]