摘要
在用多元统计分析方法进行了南海北部陆架沉积环境分区的基础上,本文利用McLaren和Bowles的碎屑沉积物迁移过程中粒度变化的随机模型研究了珠江口外内陆架上现代陆源沉积物的运移方向。18条剖面的统计结果表明,从红海湾以西至阳江以南的内陆架上,现代沉积物大部分平行于海岸向南西方向运移,至阳江以西运移方向逐渐复杂化;到广州湾出现紊乱的运移方向。这些运移绝大部分发生于低能环境中,呈现沿运移方向粒度越来越细的B型变化。这些结果与实测资料及卫星照片判读结果一致,证明了统计方法的有效性。
After defining the regional extent of the modern terrigenous sediments on the shelf off Pearl River Mouth, the paper utilized the stochastic model of McLaren and Bowles (1985) for grain-size variation in the course of sediment transportation to study the direction of transportation of modern sediments in this region. The statistical analyses of 18 traverses show that the sediments on the inner shelf west of Honghai Bay have been moving mainly southwcst-ward up to the shelf area south of Yanjiang, where the direction of movement becomes more and more complicated. Eddy current ar.d stagnant water appear in Guangzhcu Gulf. The pr.tterns of grain-size variation are mainly of B type in which sediments become finer in the direction of transport; this indicates a dominant low-energy regime on the inner shelf. These results coincide with those obtained from interpretations of measured data and satellite photos.
出处
《热带海洋学报》
CAS
CSCD
1989年第3期96-103,共8页
Journal of Tropical Oceanography
基金
中国科学院基金课题R85055的研究
