Forearc-basin closure and arc accretion in the submarine suture zone south of Taiwan

Lundberg, Neil; Reed, Donald L.; Liu, Char‐Shine; Lieske, Jay

doi:10.1016/s0040-1951(96)00295-8

Cited by 96 publications

(96 citation statements)

References 20 publications

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“…1). The morphological expressions, structural characteristics and tectonic evolution of the incipient arc-continent collision zone offshore of southeastern Taiwan have been reported extensively (e.g., Chen and Juang 1986;Chen et al 1988;Huang et al 1992Huang et al , 1995Huang et al , 1997Lundberg et al 1992Lundberg et al , 1997Fuh et al 1997;Liu et al 1998;Malavieille et al 2002). Offshore of southwestern Taiwan, where the outgrowth of the submarine accretionary wedge extends westward to the China continental slope, prominent morphological features are anticlinal ridges and submarine canyons (Fig.…”

Section: Morphotectonic Featuresmentioning

confidence: 98%

Distribution and Characters of Gas Hydrate Offshore of Southwestern Taiwan

Liu¹,

Schnürle²,

Wang³

et al. 2006

Terr. Atmos. Ocean. Sci.

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149

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ABSTRACT1 Institute of Oceanography, National Taiwan University, Taipei, Taiwan, ROC 2 Central Geologic Survey, Taipei, Taiwan, ROC 3 Exploration Department, Chinese Petroleum Company, Miaoli, Taiwan, ROC * Corresponding author address: Prof. Char-Shine Liu, Institute of Oceanography, National Taiwan University, Taipei, Taiwan, ROC; E-mail: csliu@ntu.edu.tw Bottom simulating reflector (BSR) is a key indicator for the presence of gas hydrate beneath the sea floor. Widely distributed BSRs have been observed in the area offshore of southwestern Taiwan where the active accretionary complex meets with the passive China continental margin. In order to better understand the distribution and characters of the gas hydrate in the region, closely spaced (1.86-km line spacing) multichannel seismic reflection surveys have been conducted in recent years under the support of the Central Geological Survey, ROC. Over 10000 km of multichannel seismic reflection profiles have been collected that cover an area of about 10000 km 2 offshore of southwestern Taiwan. BSRs can be identified along 50% of the seismic profiles that we collected. A newly compiled BSR distribution map suggests that gas hydrates are distributed both in the passive margin of the China continental slope as well as in the submarine Taiwan accretionary wedge, from water depths of 500 to over 3000 m. Gas hydrates are most concentrated underneath anticlinal ridges in the accretionary wedge, and underneath the slope ridges of the passive continental margin that were formed due to sedimentary processes. Active fluid activities are evident from various features observed on seismic reflection and chirp sonar profiles, such as mud volcanoes, gas plumes and gas charged shallow sedimentary layers. Fluid migration model has been established from a set of pseudo 3D seismic reflection data. The predicted locations of high fluid Terr. Atmos. Ocean. Sci., Vol. 17, No. 4, December 2006 616 flux correlate well with those interpreted from geochemical analyses that show very high methane concentrations and very shallow sulfate-methane interfaces (SMI). This demonstrates the importance of structural control over gas hydrate emplacement. From the observed gas hydrate distribution and characters, the area offshore of southwestern Taiwan provides an ideal place to study and compare the formation and migration of gas hydrates under different tectonic settings.

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Section: Morphotectonic Featuresmentioning

confidence: 98%

Distribution and Characters of Gas Hydrate Offshore of Southwestern Taiwan

Liu¹,

Schnürle²,

Wang³

et al. 2006

Terr. Atmos. Ocean. Sci.

Self Cite

149

108

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“…5. We believe that the Ma'anshan formation composes partly the basement of the Hengchun Basin and the offshore Manila accretionary prism to the south (Lundberg et al, , 1997Reed, et al, 1992).…”

Section: Hengchun Geological State Of the Artmentioning

confidence: 88%

Active tectonics of the onshore Hengchun Fault using UAS DSM combined with ALOS PS-InSAR time series (Southern Taiwan)

Deffontaines

Chang

Champenois³

et al. 2018

Nat. Hazards Earth Syst. Sci.

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Abstract. Characterizing active faults and quantifying their activity are major concerns in Taiwan, especially following the major Chichi earthquake on 21 September 1999. Among the targets that still remain poorly understood in terms of active tectonics are the Hengchun and Kenting faults (Southern Taiwan). From a geodynamic point of view, the faults affect the outcropping top of the Manila accretionary prism of the Manila subduction zone that runs from Luzon (northern Philippines) to Taiwan. In order to better locate and quantify the location and quantify the activity of the Hengchun Fault, we start from existing geological maps, which we update thanks to the use of two products derived from unmanned aircraft system acquisitions: (1) a very high precision (< 50 cm) and resolution (< 10 cm) digital surface model (DSM) and (2) a georeferenced aerial photograph mosaic of the studied area. Moreover, the superimposition of the resulting structural sketch map with new Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) results obtained from PALSAR ALOS images, validated by Global Positioning System (GPS) and leveling data, allows the characterization and quantification of the surface displacements during the monitoring period (2007)(2008)(2009)(2010)(2011). We confirm herein the geometry, characterization and quantification of the active Hengchun Fault deformation, which acts as an active leftlateral transpressive fault. As the Hengchun ridge was the location of one of the last major earthquakes in Taiwan (26 December 2006, depth: 44 km, M L = 7.0), Hengchun Peninsula active tectonics must be better constrained in order if possible to prevent major destructions in the near future.

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“…Outside of accretionary wedges, back-thrusts antithetic to the subduction thrust form, releasing accumulated strain caused by subduction. The Manila trench back-thrust lies in the eastern margin of the accretionary wedge and consists of westward-dipping thrust faults (Lundberg et al 1997 ;Shyu et al 2005;Chi and Reed 2008;Lin et al 2009). There is currently little seismicity along the back-thrust, but we assume thrusting along the boundary.…”

Section: Modelmentioning

confidence: 99%

Tsunami Folklore and Possible Tsunami Source on the Eastern Coast of Taiwan

Ando¹,

Nakamura²,

Lin³

2013

Terr. Atmos. Ocean. Sci.

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Folklore tells of a large sea wave that struck an area of Chenggong on the eastern coast of Taiwan. This event is estimated to have occurred in the middle of the 19 th century based on an oral history of the area. Despite an estimated run-up height of more than 18 m, no other folklore related to a tsunami has been found in areas adjacent to the site for several reasons. Considering the importance of understanding the dangers posed to the eastern coast of Taiwan, numerical tsunami simulations were carried out to study localized amplification effects. Three tsunami sources were studied: (1) the westernmost portion of the Ryukyu trench, (2) offshore of Chenggong and (3) the source of the 1771 Yaeyama tsunami along the Ryukyu trench. Numerical simulations using detailed bathymetric maps reveal that possible tsunami waves are not significantly amplified around Chenggong; the eastern coast of Taiwan should have been affected by the 19 th century tsunami if it was large enough. This study emphasizes the importance of investigation of paleo-tsunamis along the eastern coast of Taiwan to assess the risk for future tsunami hazards.

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Forearc-basin closure and arc accretion in the submarine suture zone south of Taiwan

Cited by 96 publications

References 20 publications

Distribution and Characters of Gas Hydrate Offshore of Southwestern Taiwan

Distribution and Characters of Gas Hydrate Offshore of Southwestern Taiwan

Active tectonics of the onshore Hengchun Fault using UAS DSM combined with ALOS PS-InSAR time series (Southern Taiwan)

Tsunami Folklore and Possible Tsunami Source on the Eastern Coast of Taiwan

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