Investigating the lithospheric velocity structures beneath the Taiwan region by nonlinear joint inversion of local and teleseismic P wave data: Slab continuity and deflection

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Title:	Investigating the lithospheric velocity structures beneath the Taiwan region by nonlinear joint inversion of local and teleseismic P wave data: Slab continuity and deflection
Authors:	郭陳澔;Huang, Hsin-Hua;Wu, Yih-Min;Song, Xiaodong;Chang, Chien-Hsin;Kuo-Chen, Hao;Lee, Shiann-Jong
Contributors:	地球科學學院地球科學學系
Keywords:	Data;Deflection;Deformation;Depth;Dynamical systems;Dynamics;Inversions;joint inversion;Latitude;Lithosphere;Magma;Mathematical models;Nonlinear dynamics;Nonlinearity;P waves;Plate tectonics;Plates (tectonics);seismic tomography;Seismology;seismotectonics;Slabs;Structures;Subduction;Subduction (geology);Taiwan orogeny;Tectonics;Tests;three-dimensional slab geometry;Velocity;Wave data
Date:	2014-09-28
Issue Date:	2026-04-23 11:36:46 (UTC+8)
Publisher:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
Abstract:	摘要： The interaction between two flipping subduction systems shapes the complicated lithospheric structures and dynamics around the Taiwan region. Whether and in what form the Eurasian Plate subducts/deforms under Taiwan Island is critical to the debate of tectonic models. Although an east dipping high‐velocity anomaly down to a depth below 200 km has been reported previously, its detailed morphology remains uncertain and leads to different interpretations. With a two‐step strategy of nonlinear joint inversion, the slab images of the Eurasian Plate were retrieved in a geometry that is hyperthin in the south, becoming massive and steeper in the central, and severely deformed in the north. The possible depth and dimension of a slab break were also investigated through synthetic tests of whether the slab had torn. Moreover, the slab deflection found at ~23.2°N latitude seems to correspond to where the nonvolcanic tremors and recent NW‐SE striking structures have occurred in southern Taiwan. Key Points High‐resolution lithospheric images are retrieved by a two‐step joint inversionThree‐dimensional geometry of the east subducting slab under Taiwan is establishedA possible slab deflection is observed at around latitude 23.2°N 其他題名： Geophys. Res. Lett 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2014-09-28 出處： Geophysical research letters, 2014-09, Vol.41 (18), p.6350-6357 資源來源： Wiley Online Library - AutoHoldings Journals 版權： 2014. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 0094-8276 識別號： EISSN: 1944-8007 識別號： DOI: 10.1002/2014GL061115
Appears in Collections:	[Department of Earth Sciences ] journal & Dissertation

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