Abstract
While the northward indentation of the Indian into Eurasian plates has been intensively investigated, its oblique subduction beneath the Indochina Peninsula (ICP) and the role it played on mantle structure and dynamics remain enigmatic. In this first regional-scale receiver function study of the mantle transition zone (MTZ) discontinuities beneath the ICP and its surrounding areas, we stack ~12,000 receiver functions recorded at 33 stations using a non-plane wave common-conversion-point stacking technique. Systematic spatial variations of MTZ thickness with departures between -21 and +24 km from the globally averaged value are revealed, providing independent evidence for the presence of slab segments in the MTZ beneath the central and a slab window beneath the western ICP. The results also support the existence of broad mantle upwelling adjacent to the eastern edge of the slab segments, which might be responsible for the widespread Cenozoic volcanisms and pervasively observed upper mantle low velocities in the area.
Recommended Citation
Y. Yu et al., "Mantle Transition Zone Discontinuities beneath the Indochina Peninsula: Implications for Slab Subduction and Mantle Upwelling," Geophysical Research Letters, vol. 44, no. 14, pp. 7159 - 7167, Blackwell Publishing Ltd, Jul 2017.
The definitive version is available at https://doi.org/10.1002/2017GL073528
Department(s)
Geosciences and Geological and Petroleum Engineering
Research Center/Lab(s)
Center for High Performance Computing Research
Geographic Coverage
Indochina
International Standard Serial Number (ISSN)
0094-8276
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2017 Blackwell Publishing Ltd, All rights reserved.
Publication Date
01 Jul 2017
