【摘要】 对淮北变性土和长江下游变性型新成土的粘土矿物半定量研究表明,变性土胶粒和粘拉以蒙皂石占优势,粘料中蒙皂石占41.1％～56.5％,次为水化云母、高岭石。新成土胶拉以蒙皂石为多,粘粒则以水化云母为主,占43.6％～51.0％,次为高岭石,尚存蒙皂石及混层矿物。二地区土壤粘拉中含蛭石,但均未发现绿泥石。粉砂中矿物类型甚多,但几无蒙皂石。作者认为大量膨胀性粘土矿物存在,是土壤产生变性诊断特征的物质基础,因而是变性土鉴定主要依据之一。文中对上述土壤作了土属的系统分类和命名。更多还原

【Abstract】 Results of semi quantitative study on composition of clay minerals of vertisols and vertic fluvants showed that contents of smectite, hydromice and kaolinite in clay fractions of vertisols collected from Huaihe River Plain were 41.1%～56.5% 23.5%～39.4% and 14.9%～20.5%, respectively. Contents of these clay minerals in clay fractions of vertic fluvants collected from lower Yangtze Plain were 20.7%～29.0%,43.6%～51.0% and 20.0%～35.7A%, respectively. Verticulite was present in all soil samples, while chlorite was only found in silt fractions of all soils under study. The diagnostic character for identification of vertisols is addressed and soil classification at family levels is suggested in this paper.更多还原