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Mantle-induced subsidence and compression in SE Asia since the early Miocene

Yang, Ting and Gurnis, Michael and Zahirovic, Sabin (2016) Mantle-induced subsidence and compression in SE Asia since the early Miocene. Geophysical Research Letters, 43 (5). pp. 1901-1909. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20160422-133059532

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Abstract

Rift basins developed extensively across Sundaland, the continental core of Southeast Asia, since the Eocene. Beginning in the early Miocene, basins in southern Sundaland experienced widespread synchronous compression (inversion) and marine inundation, despite a large drop in long-term global sea level. The mechanism for this large-scale synchronous regional sea level rise, basin inversion, and subsidence is not well understood and contrary to expectations from traditional basin models and eustatic sea level trends. We present geodynamic models of mantle convection with both deformable and rigid plate reconstructions to investigate this enigma. Models suggest that a slab stagnates within the transition zone beneath Southeast Asia before the Miocene. The stagnant slab penetrated through the 660 km mantle discontinuity during the early Miocene and formed a slab avalanche event, due to continuous subduction and accumulation of negatively buoyant slabs. This avalanche may have induced large-scale marine inundation, regional compression, and basin inversion across southern Sundaland. We argue mantle convection induced large-scale basin compression, in contrast to conventional plate margin-induced compression; this suggests mantle convection may exert a much stronger control on surface processes than previously recognized.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/2016GL068050DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2016GL068050/abstractPublisherArticle
ORCID:
AuthorORCID
Gurnis, Michael0000-0003-1704-597X
Additional Information:© 2016 American Geophysical Union. Received 31 JAN 2016; Accepted 15 FEB 2016; Accepted article online 17 FEB 2016; Published online 5 MAR 2016. We thank S. Williams and R.D. Müller for their discussions and Laurent Husson and Grace Shephard for their helpful reviews. T.Y. and M.G. were supported by Statoil ASA and the NSF (through EAR-1247022 and EAR-1028978), and S.Z. was supported by ARC grant IH130200012. Readers can contact the corresponding author to request all the data used in this paper.
Funders:
Funding AgencyGrant Number
Statoil ASAUNSPECIFIED
NSFEAR-1247022
NSFEAR-1028978
Australian Research CouncilIH130200012
Record Number:CaltechAUTHORS:20160422-133059532
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160422-133059532
Official Citation:Yang, T., M. Gurnis, and S. Zahirovic (2016), Mantle-induced subsidence and compression in SE Asia since the early Miocene, Geophys. Res. Lett., 43, 1901–1909, doi:10.1002/2016GL068050
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66415
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Apr 2016 21:15
Last Modified:24 Oct 2017 20:39

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