东海外陆架晚第四纪若干沉积学问题的研究现状与展望

A REVIEW OF THE LATE QUATERNARY SEDIMENTOLOGICAL STUDIES ON THE OUTER SHELF OF THE EAST CHINA SEA

我国东海陆架尤其外陆架的晚第四纪沉积地层、古河道沉积与下切河谷充填沉积、潮流沙脊沉积研究等已经取得较多研究成果,综述已有的研究认识和关键科学问题,讨论地层研究中的氧同位素2期和4期地层划分出现的争议、不同的地层演化模式以及与之紧密相关的末次冰盛期古河道的存在与演化、东海陆架冰后期潮流沙脊成因研究中存在的不同观点,提出未来东海外陆架晚第四纪沉积学研究的思路和工作展望。

The current study of Late Quaternary stratigraphy, paleo-river channels, channel-fillings and tidal sand ridges on the outer shelf of the East China Sea are summarized in this paper. Key questions, such as the boundaries of MIS 2 and MIS 4, the different schemes of sequence stratigraphic architectures, the existence and evolution of the paleo-Yangtze River during LGM, and the formation of the tidal sand ridges on the continental shelf of the East China Sea are highlighted and discussed. Comments and suggestions are provided in the paper for the study of the Late Quaternary sedimentation on the East China Sea in the future.