| DOI: | 10.1002/grl.50793
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| 论文题名: | Flexure of the India plate underneath the Bhutan Himalaya |
| 作者: | Hammer P.; Berthet T.; Hetényi G.; Cattin R.; Drukpa D.; Chophel J.; Lechmann S.; Moigne N.L.; Champollion C.; Doerflinger E.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8684
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| EISSN: | 1944-8415
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| 出版年: | 2013
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| 卷: | 40, 期:16 | | 起始页码: | 4225
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| 结束页码: | 4230
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| 语种: | 英语
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| 英文关键词: | eastern Himalayas
; effective elastic thickness
; flexure
; gravity
; lithosphere
; rheology
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| Scopus关键词: | Continental lithosphere
; Effective elastic thickness
; Flexural rigidities
; flexure
; Himalayas
; lithosphere
; Lithospheric flexure
; Thermomechanical model
; Gravitation
; Lithology
; Rheology
; Rigidity
; Silicate minerals
; Elasticity
; Bouguer anomaly
; continental lithosphere
; data set
; dunite
; elasticity
; flexure
; foreland basin
; geometry
; gravity field
; Indian plate
; Moho
; orogeny
; plate motion
; Bhutan
; Himalayas
; Nepal
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| 英文摘要: | We investigate flexural geometry and rheology of the India plate beneath the eastern Himalaya from a new gravity data set acquired in Bhutan. Compared to the well-studied Nepal Himalaya, the obtained Bouguer anomaly profiles across the range show shorter wavelength flexure of the lithosphere with a narrower and shallower foreland basin. This new data set and seismic Moho constraints are interpreted together in terms of lithospheric flexure using a 2-D thermomechanical model. Our results suggest that the strongest layer of the continental lithosphere beneath Bhutan is the upper mantle, as it is beneath Nepal. The observed west-to-east decrease in flexural wavelength is associated with weakening mantle rheology. The simulations show that this decrease can be related to ductile mantle behavior: either hydrated wet dunite or dry and hot olivine rheology. Both models display decoupled lithospheric layers leading to an eastward decrease of flexural rigidity from ∼1024 to ∼5·1022 N m in Nepal and Bhutan, respectively. Key Points Flexure and rheology of the India Plate in the Eastern Himalayas is investigated New gravity dataset constrains comprehensive 2D thermo-mechanical modeling Flexural rigidity decreases both across and along (W to E) the range. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882551813&doi=10.1002%2fgrl.50793&partnerID=40&md5=d2526d96064720160830fa80d0334847
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5948
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Earth Sciences, ETH Zürich, Zurich, Switzerland
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| Recommended Citation: | |
Hammer P.,Berthet T.,Hetényi G.,et al. Flexure of the India plate underneath the Bhutan Himalaya[J]. Geophysical Research Letters,2013-01-01,40(16).
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