Does extrusion occur at both tips of the Taiwan collision belt? Insights from active deformation studies in the Ilan Plain and Pingtung Plain regions

Angelier, Jacques; Chang, Teng-Hsiang; Hu, Jyr Ching; Chang, Chung Pai; Siamé, Lionel; Lee, Jian Cheng; Deffontaines, Benoı̂t; Chu, Hao‐Tsu; Chang-yi, LU

doi:10.1016/j.tecto.2007.11.015

Cited by 40 publications

(38 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to previous seismological analyses, to the north of Hualien, the present shallow crustal deformation from Ilan to Hualien is accommodated by abundant faulting with a rather complex pattern, a mixture of normal faulting, thrust faulting and strike-slip faulting (Kao et al 1998;Rau et al 2008;Wu et al 2009). In contrast, to the south of Hualian along the western side of the Coastal Range, both the geodetic and seismological data show predominantly thrust-style deformation concentrated along the major geological mapped fault, the LVF, with a minor left-lateral strike-slip component (Yu and Lee 1986;Lee and Angelier 1993;Lu et al 1995;Yu et al 1997;Kao and Jian 2001;Yu and Kuo 2001;Rau et al 2008;Angelier et al 2009). In summary, the styles of crustal deformation change substantially from shortening in southern Hualien (i.e., the Luzon arc of the Coastal Range) to extrusion and rotation in the Suao and Ilan area (i.e., the eastern edge of the Chinese continental margin).…”

Section: Introductionmentioning

confidence: 93%

“…In fact, the crustal movement behavior in northeastern Taiwan, from Ilan to the Hualien area, has been interpreted as the result of tectonic extrusion plus possible additional nearby back-arc opening effects (Lu et al 1995;Hu et al 2002;Rau et al 2008;Angelier et al 2009;Ching et al 2011). The southernmost part of the extruded block in those studies is considered located near the village of Hoping, which is about 25 -30 km north of Hualien City.…”

Section: Complex Block Rotation Tectonic Escape and The Milun Faultmentioning

confidence: 99%

“…1a) accommodates the present surface horizontal shortening of 2 -3 cm yr -1 , which is about one-third of the 8.2 cm yr -1 tectonic contraction across the whole Taiwan mountain belt (Biq 1965;Ho 1986;Yu et al 1990; Lee and Angelier 1993;Angelier et al 1997;Yu et al 1997;Lee et al 2003). On the northern and southern tips of the NNE-trending Taiwan mountain belt, the Ilan and Pingtung plains, show both lateral tectonic escape and/or horizontal strata bending with a rather complex combination of deformation features, such as block rotation, strike-slip faulting (i.e., shearing) and normal faulting (i.e., extension) (Angelier et al 1990;Lu et al 1995;Rau et al 2008;Angelier et al 2009;Ching et al 2011). Recently, Rau et al (2008) and Ching et al (2011) analyzed GPS data and illustrated a significant plate-corner rotation occurring south of the Ilan plain area in northeastern Taiwan.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Campaigned GPS on Present-Day Crustal Deformation in Northernmost Longitudinal Valley Preliminary Results, Hualien Taiwan

Chen¹,

Lee²,

Chen³

et al. 2014

Terr. Atmos. Ocean. Sci.

Self Cite

View full text Add to dashboard Cite

The Longitudinal Valley in Eastern Taiwan sits at the collision suture between the Eurasian and Philippine Sea plates. Based on repeated GPS campaigned measurements from 25 stations six times in 2007 -2009, we characterize the surface deformation in the northernmost Longitudinal Valley where the Coastal Range of the Philippine Sea plate turns northward diving under the Eurasian plate producing two major active faults: the Milun fault and the Longitudinal Valley fault. We reconstructed a GPS velocity field and conducted strain analyses and elastic block modeling. Our results suggest a rapid clockwise rotation of 33° Myr -1 and an eastward tectonic escape in the small Hualien City block (HUAL) area of ~10 × 10 km, which is apparently detached from the regional rotating RYUK block defined by previous studies. We interpret it as being initiated locally by the northwest indentation of the Coastal Range, which pushed the HUAL block to move upward and eastward. According to our strain analyses, the HUAL block shows a significant internal elastic strain inside the Milun Tableland, the hanging wall of the Milun fault. No significant deformation was observed across the surface trace of the fault, indicating that the Milun fault is now probably locked in the near surface. The deformation in the footwall of the fault was accommodated by pure-shear strain with a major NNW-compression and a minor ENE-extension. The deformation in the hanging wall is characterized by simple-shear strain with ENE-extension in its northern part and little deformation in the southern part, separated by a little known NW-trending active fault zone (Dongmingyi fault), which needs further investigation.

show abstract

Section: Introductionmentioning

confidence: 93%

Section: Complex Block Rotation Tectonic Escape and The Milun Faultmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Campaigned GPS on Present-Day Crustal Deformation in Northernmost Longitudinal Valley Preliminary Results, Hualien Taiwan

Chen¹,

Lee²,

Chen³

et al. 2014

Terr. Atmos. Ocean. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Western Foothills (WF), which is a non-metamorphic foreland and thrust belt, results from the compression of Peikang High. Further west, the Coastal Plain (CP) lies at the Deformation Front (DF) between the frontal thrust units and Peikang High (Angelier et al 2009;Mouthereau et al 2009) (Figs. 1, 3).…”

Section: Model Setupmentioning

confidence: 99%

“…The GPS velocity jumps by 30 mm/a across the Longitudinal Valley Fault (LVF), which is the suture zone of active plate collision in Taiwan Chang et al 2000;Yu and Kuo 2001). The GPS data also show rotation at both tips of the Taiwan collision belt (clockwise in NE Taiwan, anticlockwise in SW Taiwan) (Ching et al 2007;Angelier et al 2009), probably related to the escape tectonics of Taiwan (Lacombe et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Active tectonics in Taiwan: insights from a 3-D viscous finite element model

et al. 2015

View full text Add to dashboard Cite

Taiwan is a young orogenic belt with complex spatial distributions of deformation and earthquakes. We have constructed a three-dimensional finite element model to explore how the interplays between lithospheric structure and plate boundary processes control the distribution of stress and strain rates in the Taiwan region. The model assumes a liberalized power-law rheology and incorporates main lithospheric structures; the model domain is loaded by the present-day crustal velocity applied at its boundaries. The model successfully reproduces the main features of the GPS-measured strain rate patterns and the earthquake-indicated stress states in the Taiwan region. The best fitting model requires the viscosity of the lower crust to be two orders of magnitude lower than that of the upper crust and lithospheric mantle. The calculated deviatoric stress is high in regions of thrust faulting and low in regions of extensional and strike-slip faulting, consistent with the spatial pattern of seismic intensity in Taiwan.

show abstract

Seismogenic strain across the transition from fore‐arc slivering to collision in southern Taiwan

2015

View full text Add to dashboard Cite

Tectonic slivers have profound implications on the mechanical behavior of fore arcs and subduction zones. Southern Taiwan is characterized by precollision fore‐arc slivering that likely exerts important controls on the evolution of collision. Inversion of focal mechanism solutions for seismogenic strain reveals spatially partitioned plate motion south of Taiwan, with dip‐slip faulting nearer the Manila trench and strike‐slip faulting nearer the Luzon arc. To the north these kinematics are less clearly segregated, and both types of faults appear to occur in the same volume of crust. Further north deformation is dominated by oblique slip on potentially reactivated steep reverse faults in the collision zone. Existing work on the active fault zones in Taiwan suggests that the subduction‐to‐collision transition is marked by a releasing step between the strike‐slip fault that bounds the fore‐arc sliver and the oblique thrusts of the collision zone. This configuration may help to explain the lack of fore‐arc basement and cover exposed in the suture zone marked by the Longitudinal Valley.

show abstract

Does extrusion occur at both tips of the Taiwan collision belt? Insights from active deformation studies in the Ilan Plain and Pingtung Plain regions

Cited by 40 publications

References 54 publications

Campaigned GPS on Present-Day Crustal Deformation in Northernmost Longitudinal Valley Preliminary Results, Hualien Taiwan

Campaigned GPS on Present-Day Crustal Deformation in Northernmost Longitudinal Valley Preliminary Results, Hualien Taiwan

Active tectonics in Taiwan: insights from a 3-D viscous finite element model

Seismogenic strain across the transition from fore‐arc slivering to collision in southern Taiwan

Contact Info

Product

Resources

About