globalchange  > 科学计划与规划
DOI: 10.1002/2015GL066780
论文题名:
Dating the incision of the Yangtze River gorge at the First Bend using three-nuclide burial ages
作者: McPhillips D.; Hoke G.D.; Liu-Zeng J.; Bierman P.R.; Rood D.H.; Niedermann S.
刊名: Geophysical Research Letters
ISSN: 0094-9526
EISSN: 1944-9257
出版年: 2016
卷: 43, 期:1
起始页码: 101
结束页码: 110
语种: 英语
英文关键词: burial dating ; cosmogenic nuclide ; river incision ; Tibetan Plateau ; Yangtze River
Scopus关键词: Aluminum ; Isotopes ; Tectonics ; Burial ages ; Burial dating ; Cosmogenic nuclides ; Incision rates ; Lower crustal flows ; Middle Miocene ; Tibetan Plateau ; Yangtze River ; Rivers
英文摘要: Incision of the Yangtze River gorge is widely interpreted as evidence for lower crustal flow beneath the southeast margin of the Tibetan Plateau. Previous work focused on the onset of incision, but the duration of incision remains unknown. Here we present cosmogenic nuclide burial ages of sediments collected from caves on the walls of the gorge that show the gorge was incised ~1 km sometime between 18 and 9 Ma. Thereafter, incision slowed substantially. We resolve middle Miocene burial ages by using three nuclides and accounting for in situ muogenic production. This approach explains the absolute concentrations of 10Be, 26Al, and 21Ne, as well as 26Al/10Be and 21Ne/10Be ratios. A declining incision rate challenges existing geodynamic interpretations by suggesting that either (1) surface uplift has ceased immediately south of the plateau margin or (2) gorge incision is not a useful proxy for the timing of surface uplift. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956585773&doi=10.1002%2f2015GL066780&partnerID=40&md5=8812ae9a0428f53c9bf2b1727e309f07
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10489
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Earth Sciences, Syracuse University, Syracuse, NY, United States

Recommended Citation:
McPhillips D.,Hoke G.D.,Liu-Zeng J.,et al. Dating the incision of the Yangtze River gorge at the First Bend using three-nuclide burial ages[J]. Geophysical Research Letters,2016-01-01,43(1).
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