English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
 Local TagsRelease HistoryDetailsSummary
  The velocity structure and crustal anisotropy in the lithosphere-asthenosphere system of the Himalayan orogen and its adjacent areas

Zhang, X., Yang, Z., Yang, Y., Du, G., Yang, W., Shi, H., Zou, L., Liu, J. (2023): The velocity structure and crustal anisotropy in the lithosphere-asthenosphere system of the Himalayan orogen and its adjacent areas, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1451

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz.de/pubman/item/item_5017149 Version Permalink: https://gfzpublic.gfz.de/pubman/item/item_5017149_1
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Zhang, Xuemei1, Author
Yang, Zhigao1, Author
Yang, Yihai1, Author
Du, Guangbao1, Author
Yang, Wen1, Author
Shi, Haixia1, Author
Zou, Liye1, Author
Liu, Jie1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: Tethyan oceanic subduction, terrane accretion and continental collision of the Indian and Eurasian plates since 50Ma ago lead to the current Himalayan orogen. As imagined from geophysical data, the deep structure and anisotropy of the lithosphere-asthenosphere system provides important clues in understanding the modality of the orogenic convergence and collision. Based on the seismic data from CENC, IRIS and ISC, using surface wave tomography, we calculated the group velocity. Base on Metropolis rule, we improved the simulated annealing algorithm to simultaneously inverse the velocities and thicknesses and identified the Moho depth and the bottom of lithosphere. We computed receiver functions at permanent and portables stations to provide constrains for crustal deformation. A harmonic analysis was employed to investigate the accurate crustal anisotropy. Crustal shortening and thickening should have occurred beneath the study region. Its partial melting might have enhanced the crustal anisotropy and promoted the accumulation and release of strain. The Himalayan block (HM) is covered by a high velocity anomsaly of about 5% indicating a relatively thin asthenosphere with high velocity. The Vs models demonstrate the leading edge of the subducting Indian slab reaches up to Bangong-Nujiang suture belt (BNS). It indicated that the crust with the thickness of about 65 km in HM and the lithosphere ( ~160 km). The epicenters in HM is relatively deeper than that northern BNS, more deep focus earthquakes are located in the uppermost mantle. The study is supported by the Chinese National Science Foundation (41774069).

Details

show
hide
Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-1451
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -