气候变化领域集成服务门户(CCPortal): Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma

CCPortal

DOI	10.1016/j.earscirev.2021.103601
	Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma
	Zhang Z.; Daly J.S.; Li C.; Tyrrell S.; Sun X.; Badenszki E.; Li Y.; Zhang D.; Tian Y.; Yan Y.
发表日期	2021
ISSN	00128252
卷号	216
英文摘要	The timing of formation of the Three Gorges, a critical capture point on the Yangtze River, has been debated for more than a century. In this paper, we review the existing evidence and apply two sedimentary provenance proxies (Pb isotopic compositions of detrital K-feldspar and detrital zircon U[sbnd]Pb ages) to date its incision based on samples from the early Cretaceous to Quaternary western Jianghan Basin and from the Neogene Yangtze Gravel, both located downstream of the Three Gorges. We show that from the early Cretaceous to the late Eocene, the western Jianghan Basin was mainly fed by the proximal sources, including the Qinling orogen and the Huangling dome. Similarly, from the latest Oligocene to the Miocene, local paleo-rivers supplied the Yangtze Gravel, mainly from the nearby Tongbai-Dabieshan. By the late Pliocene, the Jianghan Basin was fed by a river delivering sands with a Pb isotopic character indistinguishable from that of the modern Yangtze River. These provenance indicators suggest that the Three Gorges was cut through after the late Miocene (~10 Ma) but prior to the late Pliocene (~3.4 Ma). Cretaceous-Cenozoic deposits from the Jianghan Basin and the Yangtze Gravel have a detrital zircon U[sbnd]Pb geochronology signature indistinguishable from that of the modern Yangtze River. It is inferred from this that the detrital zircon provenance signal has effectively been homogenized by complex transportation/recycling processes in the Yangtze Craton. © 2021 Elsevier B.V.
关键词	Pb-in-K-feldspar Provenance Three Gorges Yangtze River Zircon U[sbnd]Pb geochronology
英文关键词	Cenozoic; Cretaceous; detrital deposit; Eocene; geochronology; gorge; lead isotope; Miocene; Oligocene; Pliocene; provenance; uranium-lead dating; zircon; China; Dabie Mountains; Henan; Huangling Dome; Hubei; Hunan; Jianghan Basin; Qinling Belt; Tongbai; Yangtze Platform; Yangtze River
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/204186
作者单位	Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China; CAS Key Laboratory of Ocean and Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; UCD School of Earth Sciences, UCD Earth Institute, Irish Centre for Research in Applied Geosciences (iCRAG), University College Dublin, Dublin, Ireland; School of Geography and Information Engineering, China University of Geosciences, China; Earth and Ocean Sciences and Irish Centre for Research in Applied Geosciences (iCRAG), School of Natural Sciences, National University of Ireland, Galway, Ireland; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Zhang Z.,Daly J.S.,Li C.,et al. Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma[J],2021,216.
APA	Zhang Z..,Daly J.S..,Li C..,Tyrrell S..,Sun X..,...&Yan Y..(2021).Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma.Earth Science Reviews,216.
MLA	Zhang Z.,et al."Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma".Earth Science Reviews 216(2021).