摘要
以贵州合肥和平坝红土剖面为例 ,利用野外观察和室内分析测试方法 ,对碳酸盐岩风化壳岩土界面粘土层进行了系统研究。研究发现界面土层是由紫、红、棕、黄、褐、黑、灰、白等纹层状杂色粘土组成 ,其矿物成分除了含有与上部土层相似的高岭石或伊利石之外 ,还存在着新生不稳定的蛭石、绿泥石、蒙脱石、埃洛石及其间层矿物。
It exists a special clay layer between bed rock and upper laterite in the weathering crust of carbonate rock. The layer is called “the varicolored clay layer” and usually is composed of tiny laminae with purple,red, brown , yellow, black, grey, and white colors. Through detailed field observation and sampling tests of mineral composition taken from Anshun and Zunyi, we can find that “the varicolored clay layer” is of important significance. Except for common minerals such as kaolinite, halloysite and illite,there are many new unstable minerals,such as montmorillonite,chlorite,vermiculite and some interstratified clay minerals in it.They are gradually changed into stable minerals from bottom to surface.
出处
《中国岩溶》
CAS
CSCD
2000年第4期301-307,共7页
Carsologica Sinica
基金
国家自然科学重点基金!(4 98330 0 0 2 )
贵州省科学基金资助项目
关键词
碳酸盐岩风化壳
界面粘土层
不稳定间层矿物
矿物学特征
Weathering crust of carbonate rocks
Laterite on the karst interface
Unstable interbedded minerals
