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On the influence of the asthenospheric flow on the tectonics and topography at a collision-subduction transition zones: Comparison with the eastern Tibetan margin

Sternai, Pietro and Avouac, Jean-Philippe and Jolivet, Laurent and Faccenna, Claudio and Gerya, Taras and Becker, Thorsten Wolfgang and Menant, Armel (2016) On the influence of the asthenospheric flow on the tectonics and topography at a collision-subduction transition zones: Comparison with the eastern Tibetan margin. Journal of Geodynamics, 100 . pp. 184-197. ISSN 0264-3707 . http://resolver.caltech.edu/CaltechAUTHORS:20161027-083345104

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Abstract

The tectonic and topographic evolution of southeast Asia is attributed to the indentation of India into Eurasia, gravitational collapse of the uplifted terrains and the dynamics of the Sunda and other western Pacific subduction zones, but their relative contributions remain elusive. Here, we analyse 3D numerical geodynamic modelling results involving a collision-subduction system and show that vigorous asthenospheric flow due to differential along-strike slab kinematics may contribute to the surface strain and elevations at collision-subduction transition zones. We argue that protracted northward migration of the collisional front and Indian slab during south to south-westward rollback subduction along the Sunda margin might have produced a similar asthenospheric flow. This flow could have contributed to the southeast Asia extrusion tectonics and uplift of the terrains around the eastern Himalayan syntaxis and protruding from southeast Tibet. Therefore, we suggest that the tectonics and topographic growth east and southeast of Tibet are controlled not only by crustal and lithospheric deformation but also by asthenospheric dynamics.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.jog.2016.02.009DOIArticle
http://www.sciencedirect.com/science/article/pii/S0264370716300278PublisherArticle
ORCID:
AuthorORCID
Avouac, Jean-Philippe0000-0002-3060-8442
Additional Information:© 2016 Elsevier Ltd. Received 8 October 2015, Revised 16 February 2016, Accepted 21 February 2016, Available online 27 February 2016.
Group:Seismological Laboratory
Subject Keywords:Southeast Asia; Collision-subduction system; Asthenospheric flow; Extrusion tectonics; Topographic support; Geodynamic modeling
Record Number:CaltechAUTHORS:20161027-083345104
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20161027-083345104
Official Citation:Pietro Sternai, Jean-Philippe Avouac, Laurent Jolivet, Claudio Faccenna, Taras Gerya, Thorsten Wolfgang Becker, Armel Menant, On the influence of the asthenospheric flow on the tectonics and topography at a collision-subduction transition zones: Comparison with the eastern Tibetan margin, Journal of Geodynamics, Volume 100, October 2016, Pages 184-197, ISSN 0264-3707, http://dx.doi.org/10.1016/j.jog.2016.02.009. (http://www.sciencedirect.com/science/article/pii/S0264370716300278)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71532
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:27 Oct 2016 15:57
Last Modified:27 Oct 2016 15:57

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