DOI: 10.1038/ngeo2730
论文题名: Crustal-scale duplexing beneath the Yarlung Zangbo suture in the western Himalaya
作者: Gao R. ; Lu Z. ; Klemperer S.L. ; Wang H. ; Dong S. ; Li W. ; Li H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 7 起始页码: 555
结束页码: 560
语种: 英语
Scopus关键词: channel flow
; continental collision
; crustal structure
; duplex
; geometry
; Indian plate
; Moho
; orogenic belt
; plate tectonics
; seismic method
; seismic reflection
; subduction
; suture zone
; thrust fault
; China
; Himalayas
; Xizang
英文摘要: The fate of the Indian plate during continental collision with Asian terranes, and the proportion of the Indian crust that is underthrust or subducted beneath Tibet as opposed to transferred to the upper (Himalayan) plate, are much debated. The active geometry of low-angle underthrusting or subduction of the Indian plate beneath the Lesser and Greater Himalayan thrust sheets is well known from seismic imaging. Previously, only lower-resolution images of the Main Himalayan Thrust have been obtained beneath the Yarlung Zangbo suture that separates Indian and Asian rocks at the surface. It remains controversial whether the orogenic wedge between the Main Himalayan Thrust and the Yarlung Zangbo suture, formed of Indian crust transferred to the upper plate, is evolving by thrust-faulting in a critical-taper wedge or by southward extrusion of a ductile channel flow. Here we present a seismic reflection profile across the western Himalaya at 81.5° E, and show that the Main Himalayan Thrust dips ∼20° to ∼60 km depth beneath the Yarlung Zangbo suture, approaching a continuous Moho reflection at ∼70-75 km depth. The Indian crust being transported northwards beyond the Yarlung Zangbo suture is no more than ∼15 km thick, reduced from its original ∼40 km thickness by transfer of material from the lower plate to the upper plate through crustal-scale duplexing. © 2016 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105977
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Key Laboratory of EarthProbe and Geodynamics, MLR, Chinese Academy of Geological Sciences, Beijing, China; College of Geo-Exploration Science and Technology, Jilin University, Changchun, China; Department of Geophysics, Stanford University, Stanford, CA, United States; Chinese Academy of Geological Sciences, Beijing, China
Recommended Citation:
Gao R.,Lu Z.,Klemperer S.L.,et al. Crustal-scale duplexing beneath the Yarlung Zangbo suture in the western Himalaya[J]. Nature Geoscience,2016-01-01,9(7)