Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151810
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dc.contributor.authorYao, Jiayuanen_US
dc.contributor.authorLiu, Shaolinen_US
dc.contributor.authorWei, Shengjien_US
dc.contributor.authorHubbard, Judithen_US
dc.contributor.authorHuang, Bor-Shouhen_US
dc.contributor.authorChen, Mengen_US
dc.contributor.authorTong, Pingen_US
dc.date.accessioned2021-08-05T13:12:26Z-
dc.date.available2021-08-05T13:12:26Z-
dc.date.issued2021-
dc.identifier.citationYao, J., Liu, S., Wei, S., Hubbard, J., Huang, B., Chen, M. & Tong, P. (2021). Slab models beneath central Myanmar revealed by a joint inversion of regional and teleseismic traveltime data. Journal of Geophysical Research: Solid Earth, 126(2), e2020JB020164-. https://dx.doi.org/10.1029/2020JB020164en_US
dc.identifier.issn2169-9313en_US
dc.identifier.other0000-0001-7036-4238-
dc.identifier.other0000-0001-5339-5753-
dc.identifier.other0000-0002-0319-0714-
dc.identifier.other0000-0002-9980-1654-
dc.identifier.other0000-0003-4905-1960-
dc.identifier.other0000-0002-1937-3427-
dc.identifier.urihttps://hdl.handle.net/10356/151810-
dc.description.abstractThe intermediate-depth (50–180 km) seismicity beneath Myanmar provides direct evidence of the subducting Indian slab. However, the historic lack of regional seismic observations leads to previous low-resolution models that show large variations in slab geometry beneath Myanmar. The depth extent and morphology of the slab are still poorly known. In this study, we conduct a joint inversion of regional and teleseismic P-wave traveltimes from recently installed networks to image seismic velocity structures beneath central Myanmar by adopting an eikonal equation-based traveltime tomography method. The observations contain a total of 6,069 regional first P-wave arrivals and 29,787 teleseismic P-wave differential traveltimes. We find a high P-wave velocity anomaly beneath central Myanmar, which starts from ∼50 km depth and extends continuously to the mantle transition zone (MTZ) and is interpreted as the subducting Indian slab. Below 100 km depth, the dip angle of the slab in the south is ∼15° larger than that of the slab in the north, suggesting a possible slab tearing. Based on our tomographic results and previous studies, the slab in the north is inferred to have a deep stagnant segment lying above the 660-km discontinuity in the MTZ, but whether it is connected with the shallow dipping slab cannot be confirmed. Meanwhile, the slab in the south may just stay in the upper mantle (above 410 km), but it may also have penetrated the 410-km discontinuity. Taking into account all the scenarios, we propose four possible models of the Indian Plate subduction system beneath central Myanmar.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.language.isoenen_US
dc.relation04MNS001913A620en_US
dc.relationM4430239.B50en_US
dc.relation04MNP000213C230en_US
dc.relation04MNP000797C230en_US
dc.relation.ispartofJournal of Geophysical Research: Solid Earthen_US
dc.rights© 2021 American Geophysical Union (AGU). All rights reserved. This paper was published in Journal of Geophysical Research: Solid Earth and is made available with permission of American Geophysical Union (AGU).en_US
dc.subjectScience::Geologyen_US
dc.titleSlab models beneath central Myanmar revealed by a joint inversion of regional and teleseismic traveltime dataen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolAsian School of the Environmenten_US
dc.contributor.researchEarth Observatory of Singaporeen_US
dc.identifier.doi10.1029/2020JB020164-
dc.description.versionPublished versionen_US
dc.identifier.scopus2-s2.0-85101534085-
dc.identifier.issue2en_US
dc.identifier.volume126en_US
dc.identifier.spagee2020JB020164en_US
dc.subject.keywordsIndian Plate Subductionen_US
dc.subject.keywordsMyanmar Tectonicsen_US
dc.description.acknowledgementThe authors thank Paul Tapponnier and Rishav Mallick for useful discussions. This research is partly supported by the National Research Foundation Singapore and the Singapore Ministry of Education under the Research Centers of Excellence Initiative (Project Code Number: 04MNS001913A620, M4430239.B50). This work is also partly funded by MOE AcRF Tier-1 Grant (04MNP000213C230) and MOE AcRF Tier-2 Grant (04MNP000797C230).en_US
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