DOI: 10.1016/j.epsl.2017.10.043
Scopus记录号: 2-s2.0-85033556578
论文题名: Causes of rapid uplift and exceptional topography of Gongga Shan on the eastern margin of the Tibetan Plateau
作者: Cook K.L. ; Hovius N. ; Wittmann H. ; Heimsath A.M. ; Lee Y.-H.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 481 起始页码: 328
结束页码: 337
语种: 英语
英文关键词: climate-tectonic feedbacks
; cosmogenic erosion rates
; Tibetan Plateau
Scopus关键词: Faulting
; Tectonics
; Topography
; Erosion rates
; Orographic precipitation
; Relative timing
; Tectonic forcing
; Tectonic uplift
; Thermochronometry
; Tibetan Plateau
; Xianshuihe fault
; Erosion
; climate feedback
; erosion rate
; exhumation
; geodesy
; mountain region
; tectonics
; thermochronology
; topography
; uplift
; China
; Gongga Mountain
; Qinghai-Xizang Plateau
; Sichuan
; Xianshuihe Fault Zone
英文摘要: Erosion and tectonic uplift are widely thought to be coupled through feedbacks involving orographic precipitation, relief development, and crustal weakening. In many orogenic systems, it can be difficult to distinguish whether true feedbacks exist, or whether observed features are a consequence of tectonic forcing. To help elucidate these interactions, we examine Gongga Shan, a 7556 m peak on the eastern margin of the Tibetan Plateau where cosmogenic 10Be basin-wide erosion rates reach >5 mm/yr, defining a region of localized rapid erosion associated with a restraining bend in the left-lateral Xianshuihe Fault. Erosion rates are consistent with topography, thermochronometry, and geodetic data, suggesting a stable pattern of uplift and exhumation over at least the past 2–3 My. Transpression along the Xianshuihe Fault, orographically enhanced precipitation, thermally weakened crust, and substantial local relief all developed independently in the Gongga region and existed there prior to the uplift of Gongga Shan. However, only where all of these conditions are present do the observed topographic and erosional extremes exist, and their relative timing indicates that these conditions are not a consequence of rapid uplift. We conclude that their collocation at 3–4 Ma set into motion a series of feedbacks between erosion and uplift that has resulted in the exceptionally high topography and rapid erosion rates observed today. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110169
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Helmholtz Centre Potsdam, GFZ German Research Center for Geosciences, Potsdam, Germany; National Taiwan University, Taipei, Taiwan; University of Potsdam, Germany; Arizona State University, Tempe, AZ, United States; National Chung Cheng University, Chiayi County, Taiwan
Recommended Citation:
Cook K.L.,Hovius N.,Wittmann H.,et al. Causes of rapid uplift and exceptional topography of Gongga Shan on the eastern margin of the Tibetan Plateau[J]. Earth and Planetary Science Letters,2018-01-01,481