摘要
根据百余个钻孔资料的分析,辨别出代表古河谷、古河谷边缘和古河间地等三种不同的冰后期沉积层序。由沉积层序的特征、厚度、分布确定了末次冰期钱塘江古河谷的范围、深度和主河道的位置,分析了冰后期海侵过程中古河谷的充填、古海湾的形成,以及河口湾的发育和演变。钱塘江河口湾基本的发育趋势是逐渐束狭变浅。
Based on the data of more than 100 drill cores, three kinds of sedimentary sequences, representing ancient channel, ancient interfluvial and transitional zones, have been recognized. By the characteristics, thickness and distribution of these sequences, the area, depth and main channel can be identified, and the refilling of ancient channel in the process of postglacial transgression, the formation of ancient bay and the evolution of the estuary are studied. It can be anticipated that the Qiantang Estuary tends to become still narrowing and shallowing in the future.
出处
《第四纪研究》
CAS
CSCD
1993年第1期16-24,共9页
Quaternary Sciences
基金
国家自然科学基金
