9 results on '"Liu, Char‐Shine"'
Search Results
2. Potential role of strike-slip faults in opening up the South China Sea.
- Author
-
Huang, Chi-Yue, Wang, Pinxian, Yu, Mengming, You, Chen-Feng, Liu, Char-Shine, Zhao, Xixi, Shao, Lei, Zhong, Guangfa, and Yumul, Graciano P
- Subjects
STRIKE-slip faults (Geology) ,RADIOACTIVE dating ,CONTINENTAL crust ,GEOCHRONOMETRY ,GEOLOGY ,SEAS - Abstract
Radiometric dates of key rock units indicate that a remnant Late Mesozoic ocean of the Huatung Basin is still preserved today east of the South China Sea (SCS). We integrate regional geology with a Cretaceous oceanic basement in the vicinity of the Huatung Basin to reconstruct the Huatung Plate east of the Eurasian continent. Results of geophysical investigations, four expeditions of deep-sea drilling and a renaissance of regional geology allow us to propose a hypothesis that the mechanism responsible for the SCS opening was raised from strike-slip fault on the east. The hypothesis suggests that the SCS opening could highly relate to the strike-slip faults inherited from Late Mesozoic structures onshore–offshore the SE Cathaysia Block to develop rhombic-shaped extensional basins en echelon on the thinned Eurasian continental crust in the Early Cenozoic. It was followed by sinistral strike-slip movements along the boundary between the Eurasian Plate and the Huatung Plate driven by oblique subduction of the Huatung Plate to the northwest coupled with slab-pull force by southward subduction of the Proto-SCS to open up the triangle-shaped oceanic East Sub-basin in the Early Oligocene (33/34 Ma). The spreading ridge then propagated southwestward in the step-over segment between the Zhongnan-Lile and the Red River strike-slip fault systems to open the triangle-shaped oceanic Southwest Sub-basin by 23 Ma. The plate boundary fault was subsequently converted into the Manila Trench when the Eocene Sierra Madre arc of the Huatung Plate had moved from the south to its present latitude by the Middle Miocene. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
3. The Extrusion of South-West Taiwan: An Offshore-Onshore Synthesis
- Author
-
Liu Char-Shine, Benoît Deffontaines, and Chen Rou-Fei
- Subjects
Tectonics ,Submarine pipeline ,Context (language use) ,Bathymetry ,Structural geology ,Digital elevation model ,Geologic map ,Seismology ,Geology ,Neotectonics - Abstract
Neotectonic Interpretation of the different marine surveys (ACT, …) swath bathymetry and different onshore-offshore sismic profiles combined to classical structural fieldwork, geodetic, seismological and interferometric studies lead us to propose a global structural scheme and confirm the regional escape tectonics affecting both onshore-offshore of SW Taiwan. First, it is highlighted here the difficulty to only interprete the swath bathymetry even in the northern tip of the Manila accretionnary prism which is a rather simple geological context but affected by both (1) a strong amount of sedimentation due to the Taiwan mountain belt erosion, and (2) to the submarine erosion of the giant Penghu canyon. Second point, is the importance of the seismic interpretation in order to get the offshore bedding and structural data combined with the swath bathymetry and to the photointerpretation of the digital Terrain Model combined to the accurate geological maps to precisely delineate the blocks that is inferred to be submitted to a classical escape tectonic. Third, the precise study of the two new major structural boundaries Fangliao and Young-An structures which guides the SW Taiwan extrusion. Combined with onshore studies (e.g. interferometry (DINSAR), geodetic, seismology and field work) which gives (1) locations, characterization and quantification on the interseismic displacements and (2) lead us to modify our view of the global tectonic structures of the SW Taiwan. To conclude, it is highly recommended to combine both approach on and offshore geology in order to better understand geology and active structures in that part of the world.
- Published
- 2014
4. Diapiric activities and intraslope basin development offshore of SW Taiwan: A case study of the Lower Fangliao Basin gas hydrate prospect.
- Author
-
Hsu, Ho-Han, Liu, Char-Shine, Chang, Ya-Ting, Chang, Jih-Hsin, Ko, Chia-Chun, Chiu, Shye-Donq, and Chen, Song-Chuen
- Subjects
- *
DIAPIRS , *GEOLOGICAL basins , *PLATE tectonics , *SEISMIC waves , *GAS hydrates , *MARINE sediments , *GEOLOGY - Abstract
The architecture and distribution of mud diapirs are shaped by tectonic activity, sediment filling and unbalanced loading characteristics. Mud diapir development also controls spatial variations of intraslope basins in slope areas and can spur upward fluid migration with diapiric intrusion. The offshore area of southwestern Taiwan is an incipient collision zone in which thick sequences of deep marine sediments filled a rapidly subsided foredeep basin during the Pliocene. Large volumes of deposited sediment serve as source materials of diapiric ridges that extend NNE-SSW, and some mud diapirs even extend to on land SW Taiwan with subsurface signatures of gas. This study examines relationships between mud diapir and intraslope basin development in convergent tectonics through seismic and bathymetry data analyses. Four types of mud diapirs are identified: (1) buried symmetrical diapirs; (2) symmetrical diapirs extruded above the seafloor; (3) asymmetric and irregular diapirs; and (4) small individual diapirs manifested as mud intrusions found in local areas. A 3-stage model is proposed as a tool for describing the development and distribution of these types of diapirs. We further examine the relationship between mud diapirs and intraslope basin development patterns by analyzing 2D and 3D seismic images to reveal structural and sedimentary processes occurring in the Lower Fangliao Basin. This basin is characterized by BSR and amplitude anomalies of seismic profiles and is a prospect of the Taiwanese gas hydrate investigation project. An 8-stage development model with six depositional units is proposed as a means to explain the evolution of diapirs, submarine canyons, and fold and fault activities in the Lower Fangliao Basin, in turn revealing the relationship between mud diapir formation and intraslope basin development offshore of southwestern Taiwan. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
5. Westward advance of the deformation front and evolution of submarine canyons offshore of southwestern Taiwan.
- Author
-
Han, Wei-Chung, Liu, Char-Shine, Chi, Wu-Cheng, Chen, Liwen, Lin, Che-Chuan, and Chen, Song-Chuen
- Subjects
- *
SUBMARINE valleys , *EROSION , *THRUST faults (Geology) , *ACCRETIONARY wedges (Geology) , *ROCK deformation , *IMAGING systems in seismology , *GEOLOGY - Abstract
This study analyzes both 2D and 3D seismic images around the Palm Ridge area offshore of southwestern Taiwan to understand how the deformation front shifted westward and how tectonic activities interact with submarine canyon paths in the transition area between the active and passive margins. Palm Ridge is a submarine ridge that developed on the passive China continental margin by down-dip erosion of several tributaries of Penghu Canyon; it extends eastward across the deformation front into the submarine Taiwan accretionary wedge. The presence of proto-thrusts that are located west of the frontal thrust implies that the compressional stress field has advanced westward due to the convergence of the Philippine Sea Plate and Eurasian Plate. Since the deformation front is defined as the location of the most frontal contractional structure, no significant contractional structure should appear west of it. We thus suggest moving the location of the previously mapped deformation front farther west to where the westernmost proto-thrust lies. High-resolution seismic and bathymetric data reveal that the directions of the paleo-submarine canyons run transverse to the present slope dip, while the present submarine canyons head down slope in the study area. We propose that this might be the result of the westward migration of the deformation front that changed the paleo-bathymetry and thus the canyon path directions. The interactions of down-slope processes and active tectonics control the canyon paths in our study area. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
6. Trench-parallel stretching and folding of forearc basins and lateral migration of the accretionary wedge in the southern Ryukyus: A case of strain partition caused by oblique convergence
- Author
-
Lallemand, Serge, Liu, Char-Shine, Dominguez, Stéphane, Schnürle, Philippe, Malavieille, Jacques, Angelier, Jacques, Collot, Jean-Yves, Deffontaines, B., Fournier, Marc, Hsu, S.-K., Le Formal, jean-Pierre, Liu, S.-Y., Lu, C.-Y., Sibuet, Jean-Claude, Thareau, Nicolas, Wang, F., Laboratoire de Géophysique, Tectonique et Sédimentologie, Université Montpellier 2 - Sciences et Techniques (UM2), National Taiwan University [Taiwan] (NTU), Université Pierre et Marie Curie - Paris 6 (UPMC), ORSTOM, Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
- Subjects
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics ,Accretionary wedge ,010504 meteorology & atmospheric sciences ,Subduction ,Triple junction ,Trough (geology) ,010502 geochemistry & geophysics ,01 natural sciences ,Strain partitioning ,Geophysics ,Geochemistry and Petrology ,Tectonophysics ,Trench ,14. Life underwater ,Forearc ,Geology ,Seismology ,0105 earth and related environmental sciences - Abstract
International audience; Detailed seafloor mapping in the area east of Taiwan revealed trench-parallel stretching and folding of the Ryukyu forearc and lateral motion of the accretionary wedge under oblique convergence. East of 122ø40'E, a steep accretionary wedge is elongated in an E-W direction. A major transcurrent right-lateral strike-slip fault accommodates the strain partitioning caused by an oblique convergence of 40 ø. A spectacular out-of-sequence thrust may be related to the subduction of a structural high lying in the axis of the N-S trending Gagua Ridge. This asperity is likely responsible for the uplift of the accretionary wedge and forearc basement and may have augmented strain partitioning by increasing the coupling between the two plates. West of 122ø40'E, the low-taper accretionary wedge is sheared in a direction subparallel to the convergence vector with respect to the Ryukyu Arc. The bayonet shape of the southern Ryukyu Arc slope partly results from the recent (re)opening of the southern Okinawa Trough at a rate of about 2 to 4 cm/yr. Right-lateral shearing of the sedimentary forearc with respect to the nonlinear Ryukyu backstop generates trench-parallel extension in the forearc sediment sequence at dilational jogs and trench-parallel folding at compressive jogs. The Hoping Basin lies above a diffuse trench/trench/fault (TTF) or TFF unstable triple junction moving toward the south along a N-S transform zone which accommodates the southward drift of the Ryukyu Arc with respect to Eurasia.
- Published
- 1999
7. Swath Bathymetry Reveals Active Arc-Continent Collision Near Taiwan
- Author
-
Lallemand, Serge, Liu, Char-Shine, Angelier, Jacques, Collot, Jean-Yves, Deffontaines, Benoit, Dominguez, Stéphane, Fournier, Marc, Hsu, Shu-Kun, Le Formal, Jean-Pierre, Liu, Shao-Yung, Lu, Chia-Yu, Malavieille, Jacques, Schnurle, Philippe, Sibuet, Jean-Claude, Thareau, Nicolas, Wang, Fred, Centre National de la Recherche Scientifique (CNRS), Institute of Oceanography [Taipei], National Taiwan University [Taiwan] (NTU), Géoazur (GEOAZUR 6526), Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Institute of Geological and Nuclear Sciences (IGNS), Département de Géotectonique, Université Pierre et Marie Curie - Paris 6 (UPMC), Université Montpellier 2 - Sciences et Techniques (UM2), Laboratoire de tectonique (LT), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), National Central University [Taiwan] (NCU), Department of Geosciences, National Taiwan University, Department of Geosciences, Laboratoire de Géophysique, Tectonique et Sédimentologie, Laboratoire géologie structurale, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), National Central University, Zhongli, and Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne)
- Subjects
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics ,010504 meteorology & atmospheric sciences ,Subduction ,Trough (geology) ,010502 geochemistry & geophysics ,01 natural sciences ,Plate tectonics ,Passive margin ,Trench ,General Earth and Planetary Sciences ,Submarine pipeline ,Bathymetry ,14. Life underwater ,Geology ,Seabed ,Seismology ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences - Abstract
A joint French-Taiwanese cruise in May and June 1996 on the French research vessel L'Atalante has provided detailed structural images of the sea floor east and southwest of Taiwan. High quality swath bathymetry (see Figure 1) and seismic reflection profiles collected in southeastern and southwestern offshore areas near Taiwan will increase our understanding of how the Luzon Arc is deformed by its collision with the Chinese passive margin and how the Manila Trench connects with the deformation front on Taiwan. The data collected off the eastern coast of Taiwan will elucidate the nature of the plate boundary between the Ryukyu subduction zone and the Taiwan mountain belt and reveal the mode of back arc opening in the Southern Okinawa Trough. The investigations will contribute to understanding the processes of accretion of an arc to a continent prior to the ultimate collision between continents.
- Published
- 1997
8. Neotectonics of the volcanic Kuei-Shan Tao island, and geodynamic implications (NE Taiwan - SW Okinawa Trough).
- Author
-
Deffontaines, Benoit, Chang, Kuo-Jen, Huang, Pichun, Hsu, Ho-Han, Hsu, Shu-Kun, Liu, Char-Shine, Lee, Chyi-Tyi, Magalhaes, Samuel, and Fortunato, Gérardo
- Subjects
- *
NEOTECTONICS , *DIGITAL elevation models , *SHORELINES , *GEOLOGICAL maps , *GEOLOGICAL mapping , *GEOLOGY , *TOPOGRAPHY - Abstract
What are the geodynamic processes during the transition from the onshore NE Taiwan collision to the offshore southwest Okinawa back-arc basin opening associated to the Ryu-Kyu subduction? What is the local neotectonic scheme of this transition (e.g.: structural sketch map of the outcropping volcanic edifice highlighting major faults and their associated earthquakes)? These are some of the fundamental questions adressed to the Kuei-Shan Tao volcanic island (KST hereafter) which is the unique emerged volcanic outcrops situated within this geodynamic transition area. Several incompatible KST geological mappings had been published without any faults, nor dykes, nor feeders (Ichikawa, 1934 ; Hsu, 1963 ; and Chiu et al., 2010) that needed to be updated and completed on the structural point of view. In order to do so, we acquired a new high resolution UAS-drone topography (Digital Surface Model) through photogrammetric processing, with a ground resolution <10 cm. We analyse and interprete it in detail using morphostructural photo-interpretation methods. Field works on KST is restricted due to technical and administrative reasons, so we compare our morphostructural map to the shoreline outcrops observed from a boat survey. Then, we have updated the Kuei-Shan Tao geological mapping (lava flows and pyroclastic falls), and the structural scheme as well as the major erosionnal landslide processes. Taking into account the re-interpretation of surroundings offshore bathymetry, old and new seismic profiles, the different drillings done in the Kuei-Chia northern flank, previous geophysical works, the existing massive andesite datings), as well as the inferred stress regimes deduced from the earthquake's focal mechanisms, we propose a KST neotectonic map. We propose also a new scenario for the recent KST volcanic evolution. Kuei-Shan Tao geology and geodynamics may have a so great importance for the 0.5 millions citizens of the so close flat lying Ilan Plain in terms of natural hazards (eruptions, tsunamis, earthquakes...). [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
9. East Asia plate tectonics since 15 Ma: constraints from the Taiwan region
- Author
-
Sibuet, Jean-Claude, Hsu, Shu-Kun, Le Pichon, Xavier, Le Formal, Jean-Pierre, Reed, Donald, Moore, Greg, and Liu, Char-Shine
- Subjects
- *
PLATE tectonics , *GEOLOGY - Abstract
15 Ma ago, a major plate reorganization occurred in East Asia. Seafloor spreading ceased in the South China Sea, Japan Sea, Taiwan Sea, Sulu Sea, and Shikoku and Parece Vela basins. Simultaneously, shear motions also ceased along the Taiwan–Sinzi zone, the Gagua ridge and the Luzon–Ryukyu transform plate boundary. The complex system of thirteen plates suddenly evolved in a simple three-plate system (EU, PH and PA). Beneath the Manila accretionary prism and in the Huatung basin, we have determined magnetic lineation patterns as well as spreading rates deduced from the identification of magnetic lineations. These two patterns are rotated by 15°. They were formed by seafloor spreading before 15 Ma and belonged to the same ocean named the Taiwan Sea. Half-spreading rate in the Taiwan Sea was 2 cm/year from chron 23 to 20 (51 to 43 Ma) and 1 cm/year from chron 20 (43 Ma) to 5b (15 Ma). Five-plate kinematic reconstructions spanning from 15 Ma to Present show implications concerning the geodynamic evolution of East Asia. Amongst them, the 1000-km-long linear Gagua ridge was a major plate boundary which accommodated the northwestward shear motion of the PH Sea plate; the formation of Taiwan was driven by two simple lithospheric motions: (i) the subduction of the PH Sea plate beneath Eurasia with a relative westward motion of the western end (A) of the Ryukyu subduction zone; (ii) the subduction of Eurasia beneath the Philippine Sea plate with a relative southwestward motion of the northern end (B) of the Manila subduction zone. The Luzon arc only formed south of B. The collision of the Luzon arc with Eurasia occurred between A and B. East of A, the Luzon arc probably accreted against the Ryukyu forearc. [Copyright &y& Elsevier]
- Published
- 2002
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.