长江三角洲地区晚新生代地质与环境研究进展述评

发布时间：2018-01-30 12:45

  本文关键词： 长江三角洲 晚新生代 地质 环境 述评　出处：《地质力学学报》2017年01期 　论文类型：期刊论文

【摘要】：长江是我国最长的河流和世界最主要的大河之一,长江三角洲地区则是我国人口最为密集和经济最为发达的地区之一。因此,研究长江三角洲地区晚新生代地质与环境的特征与变化,特别是长江河口地区的河谷变迁与三角洲发育,对于该地区的国计民生,具有十分重要的意义。长江三角洲地区晚新生代地质与环境的科学调查研究,已经走过了整整的一个世纪。随着经济的发展和科技的进步,长江三角洲地区晚新生代地质与环境的研究也取得了重大的进展。本文从现代三角洲发育、末次盛冰期长江河谷的深切与充填作用及冰后期地层的沉积相变化,埋藏硬土层的分布、特征、成因及其古土壤学性质,三角洲地区晚第四纪时期的海侵地层层序与新近纪及早、中第四纪地层及其沉积环境,以及从三角洲钻孔的碎屑锆石、独居石年龄谱及沉积物成分和地球化学组成随时间的变化来推论长江贯通三峡的时间等方面所取得的进展和所存在的问题,按照研究时间的大体顺序和地层的新老次序进行了较详细的综述和简要评论。最后根据自己的认识和判断,概括了长江三角洲地区近一个世纪来研究工作所取得的进展和所存在的问题,并在此基础上提出了今后进一步工作的几点建议,希望能引起广大同仁及有关部门的注意,以期达到抛砖引玉的目的。
[Abstract]:The Yangtze River is one of the longest rivers in China and one of the most important rivers in the world, and the Yangtze River Delta region is one of the most densely populated and economically developed regions in China. The characteristics and changes of the late Cenozoic geology and environment in the Yangtze River Delta area, especially the river valley evolution and delta development in the Yangtze River estuary area, are studied for the national economy and the people's livelihood in this area. The late Cenozoic geology and environment in the Yangtze River Delta area has already gone through a whole century. With the development of economy and the progress of science and technology. Great progress has also been made in the study of late Cenozoic geology and environment in the Yangtze River Delta. In this paper, the development of the modern delta, the depth and filling of the Yangtze River Valley during the last glacial period and the sedimentary facies changes of the postglacial strata have been studied. The distribution, characteristics, origin and paleosoil properties of buried hard soil, transgressive stratigraphic sequence of late Quaternary period in delta area and early Neogene, Middle Quaternary strata and sedimentary environment. As well as the progress and problems in detrital zircon, monazite age spectrum, sediment composition and geochemical composition over time from the deltaic borehole to infer the time of the Yangtze River transiting the three Gorges. According to the general sequence of the study time and the new and old order of the strata, a detailed summary and a brief comment are made. Finally, according to their own understanding and judgment. This paper summarizes the progress and problems of the research work in the Yangtze River Delta region in the past century, and puts forward some suggestions for further work in the future. Hope to attract the attention of the majority of colleagues and relevant departments, in order to achieve the purpose.
【正文快照】： 第 23 卷第 1 期 2017 年 2 月 地 质 力 学 学 报 JOUＲNAL OF GEOMECHANICS Vol. 23 No. 1 Feb． 2017 文章编号: 1006-6616 ( 2017 ) 01-0001-64 长江三角洲地区晚新生代地质与环境研究进展述评 赵希涛 1 ， 2 ，胡道功 1 ，，吴中海

本文编号：1476271