DOI: 10.1002/2015GL064347
论文题名: Present-day crustal thinning in the southern and northern Tibetan Plateau revealed by GPS measurements
作者: Ge W.-P. ; Molnar P. ; Shen Z.-K. ; Li Q.
刊名: Geophysical Research Letters
ISSN: 0094-9401
EISSN: 1944-9132
出版年: 2015
卷: 42, 期: 13 起始页码: 5227
结束页码: 5235
语种: 英语
英文关键词: GPS
; strain rate
; Tibetan Plateau
Scopus关键词: Faulting
; Global positioning system
; Tectonics
; Conservation of volume
; Crustal extension
; Crustal thinning
; Extensional strain
; GPS measurements
; Northern Tibetan plateaux
; Northwest extensions
; Tibetan Plateau
; Strain rate
; crustal thinning
; faulting
; GPS
; strain rate
; structural geology
; China
; Qinghai-Xizang Plateau
英文摘要: GPS measurements from sites within the Tibetan Plateau show not only east-southeast-west-northwest extension but also, more importantly, horizontal dilation throughout the interior of the plateau. Assuming conservation of volume, vertical (thinning) strain rates equal horizontal dilation rates, and they, 8.9±0.8nanostraina-1 and 7.4±1.2nanostraina-1 in northern and southern Tibet, and 12.0±3.2nanostraina-1 in its southwestern part, suggest no measureable difference. Principal extensional strain rates also are similar in magnitude and orientation. If crustal thinning began at 10-15Ma and the current rates of horizontal dilation applied both to the entire crust and to that period, the crust should have thinned by 5.5-8.5km. If isostatic equilibrium applied, the mean elevation of the plateau would have dropped ∼1km. The similar rates for northern, southern, and southwestern Tibet suggest that the processes dictating crustal extension, normal faulting, and crustal thinning in the three regions differ little from one another. Key Points Northern and Southern Tibet deform similarly Tibetan crust thins rapidly Extrapolated to 10-15Ma, Tibetan elevations dropped 1000m. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938196469&doi=10.1002%2f2015GL064347&partnerID=40&md5=e22aa93371360ec529f2135f94e493ca
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9016
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: State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China
Recommended Citation:
Ge W.-P.,Molnar P.,Shen Z.-K.,et al. Present-day crustal thinning in the southern and northern Tibetan Plateau revealed by GPS measurements[J]. Geophysical Research Letters,2015-01-01,42(13).