• 责任者：Wang Ying (Key Laboratory of Coast and Island Development ; Ministry of Education ; Nanjing University ; Nanjing 210093 ; China) ; Zou Xinqing
• 刊名：Quaternary Sciences
• 出版年：2012
• 卷期：32(6)
• 关键词：海岸 ; coast ; 海底地貌 ; bottom features ; 三角洲沉积作用 ; deltaic sedimentation ; 黄海 ; Yellow Sea ; 东海 ; East China Sea
• 页码：p.1055-1064
• 图表：5 illus., 33 refs.
• 分类号：0200
• issnNo：ISSN1001-7410
• isbnNo：CN11-2708/P

China seas are characterized by river-sea interaction and accumulative continental shelf.With the association of arc islands,there is a set of marginal seas developed along China coastal areas.To carry huge amount of sediments,five of seven large rivers origin from Qinghai-Tibet Plateau ultimately flow into China seas.With sufficient sediments supply,a wide accumulative continental shelf was formed during Cenozoic era.This paper studies geomorphologic formation of the continental shelf in South Yellow Sea and East China Sea,where sediment discharge from the Yellow River and the Changjiang River are the major sources in contributing terrigenous deposits.According to the researches conducted in the last 3 decades,it is eventually realized that,there is a grand delta system distributed in the South Yellow Sea and East China Sea.The base of the system was an original delta,located between 34°30＇N to 26°N from north to south,and eastward boundaried as -100~-150m water depth,with the Changjiang River mouth and Hangzhou Estuary as it＇s centre,forward to sea as a 230° arc shaped delta deposited on the sea bottom.The base delta was formed during Mid-Late Pleistocene when ancient Changjiang River started to run into the Yellow Sea and the East China Sea.This bottom delta was originating from the huge river sediments,discharged from ancient Changjiang and Yellow River,and being reshaped by waves and tidal currents.Upon the huge bottom delta,there are four delta unions superimposed on the top,and developed in different geological time： Paleo Changjiang-Yellow River delta and radiative sand ridge field of Late Pleistocene,Holocene-Modern Changjiang River delta and abandoned Yellow River delta of historical time.The Paleo-Yangtze Grand Delta System geographically covers most areas of East China Sea and South Yellow Sea,which forms continental sedimentary geomorphology.A multi-dimensional survey to this region is proposed in the paper,which includes RS analysis,water depth and hydro-dynamic survey,seismic profile survey on bottom stratigraphical structure,sea-bottom surface and sedimentary core sampling,followed by multi-disciplinary scientific studies of marine geology,marine sedimentology,marine dynamics,land-sea interaction,sea-level change and marine GIS etc.Through the comprehensive study,it is expected that the geographical range of Paleo-Yangtze Grand Delta System could be identified,the sedimentary structure and geomorphologic features of the delta system could be revealed.Furthermore,the study will re-build the land-sea interaction process and dynamic mechanisms during Mid-Late Pleistocene in the region,and supply case study on the development of accumulative continental shelf,which will also provide theoretical input to marine geology.Further study of this grand delta system will contribute important scientific guideline to reveal the developing trend of eroding-depositing dynamics of modern tidal flat,to legitimately plan potential land resources in the region,and to contribute important scientific evidences to guard the National territorial sea-rights.