葛溯坝基岩中,砂岩或粉砂岩岩层间夹有一些厚薄不等,性状各异的粘土岩或粉砂质粘土岩,以及它们的泥化夹层等软弱夹层。本文主要是根据若干典型夹层的矿物成分及其定量分析结果和部分颗粒分析资料等,叙述和讨论了软弱岩层的物质组成,特别是亲水性粘土矿物的组成特性与泥化夹层形成的关系。 There are some clayey or silty clayey rocks with different thickness and different properties in sandstone or siltstone bedrocks in the bedrock of Geshangba, as well as their weak sandwiches such as argillized interlayers. This article mainly describes and discusses the material composition of weak rock formations, especially the relationship between the compositional characteristics of hydrophilic clay minerals and the formation of argillized interlayers, based on the mineral composition of some typical interlayers and their quantitative analysis results and some grain analysis data.