南海东北部沉积类型的分布规律

本文以沉积物的粒度类型为基础,结合沉积物的生物、矿物、化学组成的特征,从沉积物的成因观点综合分析,把本区沉积物分为陆源碎屑沉积(含五个沉积物带)、生源-陆源沉积(含三个沉积物带),自生-陆源沉积(含某些自生沉积矿物)和火山-陆源沉积(含某些火山碎屑物)等四种沉积类型,并论述了各类型的特征和相互关系及其空间分布等。     

DISTRIBUTION REGULARITY OF SEDIMENTARY TYPES OF NORTHEASTERN PART OF THE SOUTH CHINA SEA

Based on grain size types of the sediments, combined with characteristics of organism, mineral and chemical composition of the sediments, and a comprehensive analysis from the viewpoint of the origin of sediments, sediments in the region studied are classified into four sedimentary types, namely, terrigenous detritus (including five zones of sediments), biogenic-terrigcnous (including three zones of sediments), authigenous-terrigenous (containing some authigenic scdimentary minerals) and volcanic-terrigenous (containing certain volcanic detritus) types. Characteristics of all these types, their relationships and spatial distributions are also discussed.