本文關鍵詞： 長江三角洲 晚新生代 地質 環(huán)境 述評　出處：《地質力學學報》2017年01期 　論文類型：期刊論文

【摘要】：長江是我國最長的河流和世界最主要的大河之一,長江三角洲地區(qū)則是我國人口最為密集和經(jīng)濟最為發(fā)達的地區(qū)之一。因此,研究長江三角洲地區(qū)晚新生代地質與環(huán)境的特征與變化,特別是長江河口地區(qū)的河谷變遷與三角洲發(fā)育,對于該地區(qū)的國計民生,具有十分重要的意義。長江三角洲地區(qū)晚新生代地質與環(huán)境的科學調查研究,已經(jīng)走過了整整的一個世紀。隨著經(jīng)濟的發(fā)展和科技的進步,長江三角洲地區(qū)晚新生代地質與環(huán)境的研究也取得了重大的進展。本文從現(xiàn)代三角洲發(fā)育、末次盛冰期長江河谷的深切與充填作用及冰后期地層的沉積相變化,埋藏硬土層的分布、特征、成因及其古土壤學性質,三角洲地區(qū)晚第四紀時期的海侵地層層序與新近紀及早、中第四紀地層及其沉積環(huán)境,以及從三角洲鉆孔的碎屑鋯石、獨居石年齡譜及沉積物成分和地球化學組成隨時間的變化來推論長江貫通三峽的時間等方面所取得的進展和所存在的問題,按照研究時間的大體順序和地層的新老次序進行了較詳細的綜述和簡要評論。最后根據(jù)自己的認識和判斷,概括了長江三角洲地區(qū)近一個世紀來研究工作所取得的進展和所存在的問題,并在此基礎上提出了今后進一步工作的幾點建議,希望能引起廣大同仁及有關部門的注意,以期達到拋磚引玉的目的。
[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 質 力 學 學 報 JOUＲNAL OF GEOMECHANICS Vol. 23 No. 1 Feb． 2017 文章編號: 1006-6616 ( 2017 ) 01-0001-64 長江三角洲地區(qū)晚新生代地質與環(huán)境研究進展述評 趙希濤 1 ， 2 ，胡道功 1 ，，吳中海

本文編號：1476271