摘要
采用X射线衍射(XRD)分析技术分析了长江水下三角洲地区65个表层沉积物样品的粘土矿物。结果表明,长江水下三角洲粘土矿物主要由伊利石、绿泥石、高岭石和蒙皂石构成;长江水下三角洲亚环境粘土矿物组成则不同,三角洲前缘亚环境中高岭石和绿泥石的平均含量高于前三角洲的含量,而前三角洲亚环境中伊利石和蒙皂石的平均含量高于三角洲前缘的含量。研究区粘土矿物主要来自长江流域,属于长江源,其分布主要受沉积动力环境和粘土本身性质的制约。
The clay minerals in 65 surface sediment samples from the Changjiang River subaqueous delta were analyzed by using X-ray diffraction（XRD） analysis technique. It is shown from the analysis results that the clay minerals in surface sediments from the Changjiang River subaqueous delta are composed mainly of illite, chlorite, kaolinite and smectite; the average contents of kaolinite and chlorite in the delta front area are higher than those in the prodelta area, and the average contents of illite and smectite in the prodelta area are higher than those in the delta front area. The clay minerals in the study area are derived mainly from the Changjiang River basin, and the distributions of clay minerals are restricted mainly by the sediment hydrodynamic environment and clay mineral properties.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2007年第4期419-427,共9页
Advances in Marine Science
基金
我国近海海洋综合调查与评价专项课题--重要三角洲演变规律及重大事件的沉积记录与可持续发展研究(908-02-02-05)
我国近海海洋综合调查与评价专项课题--cj11区块海底地质调查与研究(908-01-cj11)
关键词
长江水下三角洲
表层沉积物
粘土矿物
Changjiang River subaqueous delta
surface sediment
clay mineral
