Late Quaternary sedimentary evolution of the outer shelf of the East China Sea

doi:10.1016/quaint.2018.06.043

	Late Quaternary sedimentary evolution of the outer shelf of the East China Sea
	Xe, Taoyu 1,2; Shi, Xuefa 1,2; Liu, Shengfa 1,2; Qiao, Shuqing 1,2; Yao, Zhengquan 1,2; Fang, Xisheng 1,2; Wu, Yonghua 1,2; Shan, Xin 1,2; Liu, Jianxing 1,2; Yang, Gang 1,2
刊名	QUATERNARY INTERNATIONAL
	2018-11-10
卷号	493 页码:59-69
关键词	Late Quaternary East China Sea Continental shelf Sedimentary facies Sedimentary processes
ISSN号	1040-6182
DOI	10.1016/quaint.2018.06.043
英文摘要	This study investigated the late Quaternary sedimentary evolution of the outer shelf of the East China Sea (ECS) using borehole core data (DH02). Three unconformity-bounded sedimentary facies, namely, prodelta facies of marine isotopic stage (MIS) 3, intertidal to subtidal flat facies of the deglacial period, and offshore tidal sand ridge facies of the Holocene, were identified from the base upward according to combined evidence of lithology, microfossil assemblages, and geochronology. Through comparative analysis with other neighboring borehole cores, these three facies, along with the MIS 3 nearshore facies and the last glacial maximum (LGM) river facies, were found to constitute the late Quaternary sediment strata. Sedimentary processes of these five facies were interpreted based on a synthetic consideration of sea -level change, climate variation, paleotopographic setting, and paleoriver-sea interactions. In particular, the development of the delta was attributable to integration of the slow sea -level decline during the later stage of the MIS 3 and abundant sediment supply resulting from the warm wet climate. The gentle shelf topography suggests the presence of shallow and wide rivers in the delta, and the lateral shift of river channels might have induced the local formation of nearshore facies at the abandoned river mouth. The LGM river facies, which was rarely observed (presumably due to marine erosion with deglacial transgression), was inferred to have been deposited during the latter half of the LGM in response to the rise in river base level. Occurrences of tidal flat facies imply the formation of a tide -dominated estuary with the de glacial transgression. Furthermore, tidal flat sediments were reworked by enhanced tidal currents in the estuary front environment, forming mud ridges during subsequent deglacial transgression. Formation of tidal sand ridges in offshore environments of the Holocene was attributable to the uneven base caused by the underlying estuarine erosion mud ridges, and this promoted the occurrence of tidal depositional processes. The sedimentary evolution in association with sea -level change was constructed using the above -mentioned results. Overall, this study systematically elucidates the late Quaternary sedimentary processes and evolution of the outer ECS shelf, and provides an insight into the sedimentary development of analogous shelves around the world.
资助项目	Basic Scientific Fund for National Public Research Institutes of China[GY2015P11]
WOS关键词	YANGTZE-RIVER DELTA ; TIDAL SAND RIDGES ; INNER CONTINENTAL-SHELF ; INCISED-VALLEY FILL ; YELLOW-RIVER ; LEVEL CHANGE ; STRATIGRAPHY ; ESTUARY ; PROGRADATION ; ARCHITECTURE
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000447489200007
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26743]
专题	自然资源部第一海洋研究所
通讯作者	Shi, Xuefa
作者单位	1.SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Tongji Univ, Lab Marine Geol, Shanghai 200092, Peoples R China
推荐引用方式 GB/T 7714	Xe, Taoyu,Shi, Xuefa,Liu, Shengfa,et al. Late Quaternary sedimentary evolution of the outer shelf of the East China Sea[J]. QUATERNARY INTERNATIONAL,2018,493:59-69.
APA	Xe, Taoyu.,Shi, Xuefa.,Liu, Shengfa.,Qiao, Shuqing.,Yao, Zhengquan.,...&Zhao, Quanhong.(2018).Late Quaternary sedimentary evolution of the outer shelf of the East China Sea.QUATERNARY INTERNATIONAL,493,59-69.
MLA	Xe, Taoyu,et al."Late Quaternary sedimentary evolution of the outer shelf of the East China Sea".QUATERNARY INTERNATIONAL 493(2018):59-69.