Pacific subduction control on Asian continental deformation including Tibetan extension and eastward extrusion tectonics

W. P. Schellart*, Z. Chen, V. Strak, J. C. Duarte, F. M. Rosas

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


The India-Asia collision has formed the highest mountains on Earth and is thought to account for extensive intraplate deformation in Asia. The prevailing explanation considers the role of the Pacific and Sunda subduction zones as passive during deformation. Here we test the hypothesis that subduction played an active role and present geodynamic experiments of continental deformation that model Indian indentation and active subduction rollback. We show that the synchronous activity and interaction of the collision zone and subduction zones explain Asian deformation, and demonstrate that east-west extension in Tibet, eastward continental extrusion and Asian backarc basin formation are controlled by large-scale Pacific and Sunda slab rollback. The models require 1740 ± 300 km of Indian indentation such that backarc basins form and central East Asian extension conforms estimates. Indentation and rollback produce ~260–360 km of eastward extrusion and large-scale clockwise upper mantle circulation from Tibet towards East Asia and back to India.

Original languageEnglish
Article number4480
Pages (from-to)1-15
Number of pages15
JournalNature Communications
Issue number1
Publication statusPublished - 2 Oct 2019


We thank G. Lister for helpful discussions and comments. W.P.S. would also like to thank Casper Schellart for help with producing Fig. 4. W.P.S. has been funded by a Vici Fellowship (016.VICI.170.110) from the Dutch National Science Foundation (NWO) and a Future Fellowship (FT110100560) from the Australian Research Council. J.C.D. and F.M.R. acknowledge funding from FCT project UID/GEO/50019/2019-IDL. J.C.D. acknowledges funding from exploratory project grant ref. IF/00702/2015.

FundersFunder number
Australian Research Council
Fundação para a Ciência e a TecnologiaUID/GEO/50019/2019-IDL, IF/00702/2015
Nederlandse Organisatie voor Wetenschappelijk OnderzoekFT110100560


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