scholarly journals Tectonic deformation features and petroleum geological significance in Yinggehai large strike-slip basin, South China Sea

2018 ◽  
Vol 45 (2) ◽  
pp. 204-214
Author(s):  
Caiwei FAN
Keyword(s):  
South China Sea ◽  
South China ◽  
Strike Slip ◽  
Tectonic Deformation ◽  
Geological Significance ◽  
China Sea ◽  
Deformation Features

Partitioning between strike-slip and orthogonal extension in the western South China Sea

2020 ◽  
Author(s):  
Pan Luo ◽  
Jianye Ren ◽  
Xi He ◽  
Chao Lei ◽  
Junjie Xu ◽  
...  
Keyword(s):  
South China Sea ◽  
Continental Crust ◽  
South China ◽  
Large Scale ◽  
Strike Slip ◽  
Fault System ◽  
Relative Role ◽  
China Sea ◽  
Kinematic Evolution ◽  
Mantle Exhumation

<p>Our study focuses on the Zhongjianna (ZJN) (Phu Kham) Basin, located at the western termination of the South China Sea (SCS) and separated from the Indochina continent by the N-S striking East Vietnam Boundary Fault Zone, which is a large scale strike-slip fault system. The sedimentary infill history of the ZJN basin records the complete evolution and interaction of the Indochina-SCS system and allows the tectonic and kinematic evolution of the basin to be understood.. The discovery of hyper-extended continental crust and mantle exhumation in this basin leads to the question of what is the relative role of large-scale strike-slip and orthogonal faulting in controlling crustal thinning in the ZJN basin.  </p><p>  Our preliminary results confirm the existence of hyperextended continental crust flooring the ZJN basin. Two different types of structures can be identified in this area: extension related deformation in the eastern part and strike-slip related deformation in the western part. The analysis of fault geometries and kinematics linked to timing and subsidence rates suggest that the N-S-orientated strike-slip structures dominated the continental shelf and slope area on the west side of the basin. In the basin, however, most faults strike NE-SW and are parallel to the mid-ocean ridge. Thus, it appears that the ZJN basin resulted from the partitioning between strike-slip and orthogonal extension.</p><p>In our presentation we show the results of our seismic interpretation, strain and subsidence analysis and discuss the interaction between strike-slip and orthogonal extension in setting up the hyper-extended ZJN basin and its implications for the large scale tectonic and geodynamic framework.</p>

Research progress on the Zhongnan-Liyue Fault Zone in the South China Sea Basin

2020 ◽  
Author(s):  
Ziying Xu ◽  
Jun Wang ◽  
Hongfang Gao ◽  
Yongjian Yao
Keyword(s):  
Spatial Distribution ◽  
South China Sea ◽  
Fault Zone ◽  
South China ◽  
The South China Sea ◽  
Magnetic Data ◽  
Tectonic Deformation ◽  
The South ◽  
China Sea ◽  
The North

<p>We give a review of the up-to-date research situation about The Zhongnan-Liyue Fault Zone (ZLFZ), than analyze the spatial distribution and tectonic deformation feature of the ZLFZ based on the geophysical data including topographic, seismic, gravity and magnetic data. The results show that the ZLFZ has obvious north-south segmentation characteristics in in the South China Sea Basin. The north section, which is between northwest sub-basin and east sub-basin, is a narrow zone with the width of ~16 km, and is NNW trend from 18°N,115.5°E to 17.5°N,116°E. Meanwhile ,the south section, which is between southwest sub-basin and east sub-basin, is a wide zone with the width of 60-80 km, and is NNW trend from the east of ZhongshaBank to the west of LiyueBank. The main fault of the ZLFZ is NNW trend along the seamounts ridge of Zhongnan. the ZLFZ of transition region is NNE trend from the north section to the south section. According the sub-basin’s sedimentary thickness and oceanic crust thickness exist obvious difference, on both sides of the ZLFZ, we speculate that the ZLFZ play an important role on geological structure of sub-basin. According to the chang of crustal structure, We speculate that the ZLFZ is at least a crustal fracture zone.</p><p><strong>Key words: </strong>South China Sea Basin; Zhongnan-Liyue Fault Zone; Spatial distribution; Tectonic deformation<strong> </strong></p><p><strong>Foundation item:</strong> National Natural Science Foundation of China (41606080, 41576068); The China Geological Survey Program (GZH201400202, 1212011220117, DD20160138, 1212011220116).</p>

scholarly journals Holocene relative sea-level records from coral microatolls in Western Borneo, South China Sea

The Holocene ◽  
2018 ◽  
Vol 28 (9) ◽  
pp. 1431-1442 ◽  
Author(s):  
Jędrzej M Majewski ◽  
Adam D Switzer ◽  
Aron J Meltzner ◽  
Peter R Parham ◽  
Benjamin P Horton ◽  
...  
Keyword(s):  
South China Sea ◽  
Sea Level ◽  
South China ◽  
Tectonic Deformation ◽  
Spatial Gradient ◽  
Sunda Shelf ◽  
Relative Sea Level ◽  
China Sea ◽  
Isostatic Adjustment ◽  
Vertical Land Motion

The spatial variability of Holocene relative sea level (RSL) in the South China Sea is unknown, with data restricted to Thailand, the Malay Peninsula, and a few other isolated sites. In this study, we present new continuous RSL records for Borneo using surveyed and U–Th dated coral microatolls from four sites in western Sarawak. The record spans 450 years of RSL from 7450 to 7000 yr BP. Our data suggest that RSL was higher than present and rapid RSL rise had ceased by 7450 yr BP. We compare these RSL reconstructions with a regional model of glacial-isostatic adjustment (GIA). The RSL reconstructions from three sites off the coast of Sarawak show a spatial gradient opposite to that predicted by the GIA model. This disagreement can best be explained by tectonic deformation since 7000 yr BP, which was previously unrecognized. We propose vertical land motion of 0.7–1.45 m due to slip on the Serabang fault, which runs between our four sites. This slip may have occurred in response to the loading of the Sunda Shelf by rising sea level.

scholarly journals Potential role of strike-slip faults in opening up the South China Sea

2019 ◽  
Vol 6 (5) ◽  
pp. 891-901 ◽  
Author(s):  
Chi-Yue Huang ◽  
Pinxian Wang ◽  
Mengming Yu ◽  
Chen-Feng You ◽  
Char-Shine Liu ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Strike Slip ◽  
The South China Sea ◽  
Strike Slip Fault ◽  
Spreading Ridge ◽  
The South ◽  
Regional Geology ◽  
Late Mesozoic ◽  
China Sea

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.

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