First local seismic tomography for Red River shear zone, northern Vietnam: Stepwise inversion employing crustal P and Pn waves

Huang, Hsin-Hua; Xu, Zhen; Wu, Yih‐Min; Song, Xiaodong; Huang, B.; Nguyen, Le-Minh

doi:10.1016/j.tecto.2012.03.030

Cited by 26 publications

(39 citation statements)

References 48 publications

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“…This feature disappears in the lower crust (24 s) and becomes a low-velocity belt, which is well consistent with the models of Xu et al (2005) and Lei et al (2009) in Yunnan Province. Huang et al (2013) interpreted this velocity anomaly in terms of metamorphic batholith at the surface with a possible melt at greater depths.…”

Section: Fault Systemsmentioning

confidence: 99%

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Anisotropic Rayleigh-wave phase velocities beneath northern Vietnam

Legendre

Zhao

Huang

et al. 2015

Earth, Planets and Space

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We explore the Rayleigh-wave phase-velocity structure beneath northern Vietnam over a broad period range of 5 to 250 s. We use the two-stations technique to derive the dispersion curves from the waveforms of 798 teleseismic events recoded by a set of 23 broadband seismic stations deployed in northern Vietnam. These dispersion curves are then inverted for both isotropic and azimuthally anisotropic Rayleigh-wave phase-velocity maps in the frequency range of 10 to 50 s. Main findings include a crustal expression of the Red River Shear Zone and the Song Ma Fault. Northern Vietnam displays a northeast/southwest dichotomy in the lithosphere with fast velocities beneath the South China Block and slow velocities beneath the Simao Block and between the Red River Fault and the Song Da Fault. The anisotropy in the region is relatively simple, with a high amplitude and fast directions parallel to the Red River Shear Zone in the western part. In the eastern part, the amplitudes are generally smaller and the fast axis displays more variations with periods.

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Section: Fault Systemsmentioning

confidence: 99%

“…The Red River Shear Zone (RRSZ) extends NW-SE for about 1,000 km from SE Tibet to the South China Sea (Avouac and Tapponnier 1993;Huang et al 2009Huang et al , 2013Searle 2006;Tapponnier et al 1986;Yeh et al 2008). It is *Correspondence: legendre@earth.sinica.edu.tw Institute of Earth Sciences, Academia Sinica, 128 Academia Road, Sec.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Rayleigh-wave phase velocities beneath northern Vietnam

Legendre

Zhao

Huang

et al. 2015

Earth, Planets and Space

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“…Such rightelateral motion began at 5 to 13 Ma Bergman et al, 1997). Moreover, the strikeeslip shear zone has now been shown to be a lithospheric structure that cuts through the crust, according to observations that show a sharp change in the depth of the Moho across it, as well as a lowevelocity belt along the shear zone at the top of the mantle (Huang et al, 2013).…”

Section: The Ailao Shanered River Shear Zonementioning

confidence: 99%

The Xuelongshan high strain zone: Cenozoic structural evolution and implications for fault linkages and deformation along the Ailao Shan–Red River shear zone

Zhang

Jiang

et al. 2014

Journal of Structural Geology

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“…In vertical profiles, the black solid line represents the Vp = 7.5 km/s contour as the reference of the Moho interface. Low‐resolution areas in the images are blanked (in dark gray) by the resolvability index converted from the checkerboard test results [ Huang et al ., , ]. From the southernmost Profile AA′, a hyperthin slab‐like anomaly of high Vp overlain by a thick layer of low Vp is observed, which is the narrow Vp zone to the south of the deflection that we observed in the slice at the 60 km depth.…”

Section: Tomographic Images and Verificationmentioning

confidence: 99%

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

Huang

Song

et al. 2014

Geophys. Res. Lett.

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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.

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First local seismic tomography for Red River shear zone, northern Vietnam: Stepwise inversion employing crustal P and Pn waves

Cited by 26 publications

References 48 publications

Anisotropic Rayleigh-wave phase velocities beneath northern Vietnam

Anisotropic Rayleigh-wave phase velocities beneath northern Vietnam

The Xuelongshan high strain zone: Cenozoic structural evolution and implications for fault linkages and deformation along the Ailao Shan–Red River shear zone

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

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