globalchange  > 气候变化与战略
DOI: 10.1016/j.earscirev.2021.103601
论文题名:
Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma
作者: Zhang Z.; Daly J.S.; Li C.; Tyrrell S.; Sun X.; Badenszki E.; Li Y.; Zhang D.; Tian Y.; Yan Y.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2021
卷: 216
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166555
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Zhang Z.,Daly J.S.,Li C.,et al. Formation of the Three Gorges (Yangtze River) no earlier than 10 Ma[J]. Earth Science Reviews,2021-01-01,216
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