Relationship between the migration of crustal material, normal faulting, and gneiss domes in the vicinity of the Dinggye region, central part of the Tethys–Himalaya terrane

Insights from the 3-D electrical structure

Journal Article (2023)
Author(s)

Yue Sheng (China University of Geosciences)

Sheng Jin (China University of Geosciences)

M.J. Comeau (TU Delft - Applied Geophysics and Petrophysics)

Zengqian Hou (Chinese Academy of Geological Sciences)

Letian Zhang (China University of Geosciences)

Wenbo Wei (China University of Geosciences)

Gaofeng Ye (China University of Geosciences)

Research Group
Applied Geophysics and Petrophysics
Copyright
© 2023 Yue Sheng, Sheng Jin, M.J. Comeau, Zengqian Hou, Letian Zhang, Wenbo Wei, Gaofeng Ye
DOI related publication
https://doi.org/10.1016/j.tecto.2023.230100
More Info
expand_more
Publication Year
2023
Language
English
Copyright
© 2023 Yue Sheng, Sheng Jin, M.J. Comeau, Zengqian Hou, Letian Zhang, Wenbo Wei, Gaofeng Ye
Research Group
Applied Geophysics and Petrophysics
Bibliographical Note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. @en
Volume number
869
Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Abstract

The Dinggye region, in the central part of the Himalayan orogenic belt, includes the southern part of the Xainza-Dinggye rift and the Mabja Gneiss Dome with leucogranite cores. Previous studies of gneiss domes in this region report the existence of channel flow processes or tectonic exhumation, in addition to partial melting of orogenic mid-crust. However, the relationship between the crustal migration of materials and the north-south-trending normal rifts remains largely unexplored. In this work, we generate a new 3-D electrical resistivity model from an array of magnetotelluric data in the Dinggye region and examine it in addition to other electrical resistivity models to the north and east from previous works. By comparing the geophysical models with available geological and geochemical evidence, we find a clear relationship between the electrical resistivity structure, the presence of gneiss domes, north-south-trending normal rifting, and deep plunging subduction which is related to the source of Helium isotopes (crustal or mantle origin). Overall, the results suggest that the southern migration of lithospheric materials likely contributed to the evolution of the rifts in the Tethys-Himalaya terrane, which also may have been influenced by uplifting and cooling of gneiss domes. The models are consistent with tearing of the Indian lithosphere beneath the Xainza-Dinggye rift and other adjacent rifts. Additionally, the difference in the electrical structure related to the Indian crust along the east-west direction likely results from the exhumation of the continental slab, metamorphism in the Tethys-Himalaya terrane, and southern extrusion of materials in the Lhasa terrane.

Files

1_s2.0_S0040195123003980_main.... (pdf)
(pdf | 10.7 Mb)
- Embargo expired in 16-05-2024
License info not available