Late Quaternary sedimentary evolution of the outer shelf of the East China Sea
Late Quaternary sedimentary evolution of the outer shelf of the East China Sea
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东海外陆架晚第四纪沉积演化
DOI：
10.1016/j.quaint.2018.06.043
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发表时间：
2018-11
影响因子：
2.2
通讯作者：
Quanhong Zhao
中科院分区：
文献类型：
--
作者：
Taoyu Xu;Xuefa Shi;Shengfa Liu;Shuqing Qiao;Zhengquan Yao;Xisheng Fang;Yonghua Wu;Xin Shan;Jianxing Liu;Gang Yang;Chenguang Liu;Xiaoyan Li;Jingjing Cui;Quanhong Zhao
利用钻孔岩心资料（DH 02）研究了东海外陆架晚第四纪沉积演化。根据岩性、微体化石组合和年代学的综合证据，自下而上识别出3种不整合界面沉积相，即海洋同位素阶段（MIS）3的前三角洲相、冰消期的潮间-潮下坪相和全新世的近海潮汐沙脊相。通过与邻近钻孔岩心的对比分析，发现这3个相与MIS 3近岸相和末次冰期最大期河流相一起，沿着构成晚第四纪沉积地层。综合考虑海平面变化、气候变化、古地形背景和古河海相互作用等因素，对这5种沉积相的沉积过程进行了解释。特别是，三角洲的发展是由于在MIS 3后期海平面下降缓慢和温暖潮湿的气候带来的丰富的沉积物供应的整合。平缓的陆棚地形表明三角洲中存在浅而宽的河流，河道的横向移动可能导致废弃河口局部形成近岸相。末次盛冰期河流相，这是很少观察到的（可能是由于海洋侵蚀与冰消海侵），被推断为已沉积在末次盛冰期的后半段，在河流基准面的上升。潮坪相的出现意味着冰消期海侵的潮控河口的形成。此外，潮坪沉积物被改造的增强潮流在河口前缘环境，形成泥脊在随后的冰消海侵。全新世近海环境中潮沙脊的形成是由于下伏河口侵蚀泥脊造成的底质不均匀，促进了潮汐沉积过程的发生。利用上述结果，构建了与海平面变化相关的沉积演化。总体而言，本研究系统地阐明了晚第四纪沉积过程和演化的外部ECS货架，并提供了一个洞察世界各地类似的货架的沉积发展。
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 deglacial 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.
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影响因子：
2.9
作者：
Zhongyuan Chen;Y. Saito;K. Hori;Yiwen Zhao;A. Kitamura
通讯作者：
Zhongyuan Chen;Y. Saito;K. Hori;Yiwen Zhao;A. Kitamura
东海济州岛西南部末次冰消期和全新世沉积物物源判别
影响因子：
3
作者：
Dou Yanguang;Yang Shouye;Lim Dhong-Il;Jung Hoi-Soo
通讯作者：
Jung Hoi-Soo
影响因子：
2.3
作者：
Zhongbo Wang;Shouye Yang;Qiang Wang;Zhixun Zhang;Xun-hua Zhang;Xianhong Lan;Ri-hui Li;Long Huang-Long
通讯作者：
Zhongbo Wang;Shouye Yang;Qiang Wang;Zhixun Zhang;Xun-hua Zhang;Xianhong Lan;Ri-hui Li;Long Huang-Long
影响因子：
2.8
作者：
Y. Saito;H. Katayama;K. Ikehara;Y. Kato;E. Matsumoto;K. Oguri;M. Oda;Mariko Yumoto
通讯作者：
Y. Saito;H. Katayama;K. Ikehara;Y. Kato;E. Matsumoto;K. Oguri;M. Oda;Mariko Yumoto
影响因子：
3.9
作者：
K. Dittmers;F. Niessen;R. Stein
通讯作者：
K. Dittmers;F. Niessen;R. Stein