Geometric model of conjugate faulting in the Gyeongsang Basin, southeast Korea

Hwang, Byung Wook; Ernst, W. G.; McWilliams, Michael; Yang, Kyounghoon

doi:10.1029/2008tc002343

Cited by 18 publications

(3 citation statements)

References 49 publications

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“…However, the sinistral strike‐slip movement in the SB‐SYSB was weakened by the Sulu orogenic belt located in the northern sector of the basin, resulting in a tendency for displacements to decrease toward the orogenic belt. The NE trending sinistral strike‐slip faulting and the NW trending dextral strike‐slip faulting divided the basin into a series of rhombus blocks (Figure 15), and these blocks were inferred to experience anticlockwise rotations along the faults that can be frequently observed near the intersection of the strike‐slip faults (Allen & Allen, 2013; Hwang et al, 2008). Plate subduction also caused crustal thinning and mantle upwelling, contributing to abundant igneous activity during the Late Jurassic‐Early Cretaceous.…”

Section: Discussionmentioning

confidence: 99%

The Late Jurassic to Early Cretaceous Strike‐Slip Faults in the Subei‐South Yellow Sea Basin, Eastern China: Constraints From Seismic Data

Yang

Zhou³

et al. 2020

Tectonics

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Late Jurassic-Early Cretaceous strike-slip faults play an important role in basin formation and igneous activities in eastern China and the adjacent areas. Because of the lack of seismic data, their distribution and effect on the formation of basins and igneous activities in the Subei-South Yellow Sea Basin (SB-SYSB) are still poorly understood. In this study, based on systematic analyses of the acquired seismic data, the Late Jurassic-Early Cretaceous strike-slip faults in the SB-SYSB were identified and characterized. The strike-slip faults can be divided into two sets, a NE-NNE trending sinistral strike-slip fault system and a NW trending dextral fault system. They present in seismic sections as a flower structure or Y/V-shaped structure, respectively. In map view, they show horsetail splay faults, en echelon reverse faults, pull-apart structure, linear structure, or curvilinear structure. These faults resulted in different types of subbasins in the SB-SYSB, such as transpressional/transtensional subbasins and pull-apart subbasins. The close relationship between the strike-slip faults and the distribution of igneous rocks in the SB-SYSB suggest that the strike-slip faults probably acted as efficient pathways for magma intrusion during the Late Jurassic-Early Cretaceous. The sinistral displacement was characterized by thrusting-folding deformation structures, which show a tendency to decrease toward the Sulu orogenic belt, indicating that the Sulu orogenic belt has probably weakened the strike-slip movement in the basin. We infer that the sinistral strike-slip movement in the SB-SYSB was most likely controlled by the subduction of the paleo-Pacific plate and the Tan-Lu strike-slip faulting.

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Section: Discussionmentioning

confidence: 99%

The Late Jurassic to Early Cretaceous Strike‐Slip Faults in the Subei‐South Yellow Sea Basin, Eastern China: Constraints From Seismic Data

Yang

Zhou³

et al. 2020

Tectonics

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“…The presence of reactivated basement‐cutting faults in and outwards of the CF offers a possibility to adopt the model of Ron et al. (1984), successfully used worldwide (see extensive discussion in Hwang et al. , 2008) and further developed by Peacock et al.…”

Section: Discussionmentioning

confidence: 99%

‘Non‐European’ palaeomagnetic directions from the Carpathian Foredeep at the southern margin of the European plate

Márton¹,

Tokarski

Krejčí

et al. 2011

Terra Nova

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Terra Nova, 23, 134–144, 2011 Abstract A palaeomagnetic study carried out at 33 geographically distributed localities in the Miocene fill of the 600‐km‐long Moravian and Polish segment of the Carpathian Foredeep revealed an overall more than 20° CCW rotation of the area. These new palaeomagnetic results can be best interpreted in terms of CCW rotation starting at around 17 Ma. The rotations must have affected not only the sedimentary fill of the Carpathian Foredeep but also the basement, owing to the dextral shift on NW–SE trending block‐bounding faults observed in the basement and in the Miocene sediments. This evidence for `non‐European' palaeomagnetic directions north of the Alpine–Carpathian mountain chain together with previously published indications question the rigidity of the European plate during the last 20 Ma, at least near the thrust front of the Alps and Carpathians.

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“…However, this uniform origin of the granitic rocks requires modification because of recent studies regarding magma mixing (Kim et al 1998(Kim et al , 1999Jeen et al 2000;Jwa and Kim 2000;Kim 2001;Kim et al 2002;Hwang 2004) and the recognition of the presence of A-type granites generated in a tensional tectonic environment (Yun and Hwang 1990;Koh 1994Koh , 2001Hwang 1995;Lee et al 1995;Koh et al 1996;Kim and Kim 1997;Lee et al 1997;Lee and Hwang 1999;Hwang 2004). On the basis of a genetic relationship between the origin of the granitic rocks and the fault systems that cut them, magmatism in the Gyeongsang Basin evidently was closely related to strike-slip faulting, involving a change of the tectonic regime from compressional to tensional (Hwang 2004;Hwang et al 2007aHwang et al , 2007bHwang et al , 2008aHwang et al , 2008b. The Yucheon volcanic rocks and the Bulguksa intrusive rocks are co-magmatic, judging by the similarity of their geochemical + isotopic characteristics and ages (Kim 1986; Geological Society of Korea 1998).…”

Section: Geological Settingmentioning

confidence: 99%

Timing of granitic magma mixing in the southeastern Gyeongsang Basin, Korea: SHRIMP-RG zircon data

Hwang

2010

International Geology Review

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Late Cretaceous calc-alkaline granites in the Gyeongsang Basin evolved through the mixing of mafic and felsic magmas. The host granites contain numerous mafic magmatic/ microgranular enclaves of various shapes and sizes. New SHRIMP-RG zircon U-Pb ages of both granite and mafic magmatic/microgranular enclaves are 75.0 ± 0.5 Ma and 74.9 ± 0.6 Ma, respectively, suggesting that they crystallized contemporaneously after magma mixing. The time of injection of mafic melt into the felsic magma chamber can be recognized as approximately 75 Ma by field relations, petrographic features, geochemical evolution, and SHRIMP-RG zircon dating. This Late Cretaceous magma mixing event in the Korean Peninsula was probably related to the onset of subduction of the Izanagi (Kula)-Pacific ridge.

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Geometric model of conjugate faulting in the Gyeongsang Basin, southeast Korea

Cited by 18 publications

References 49 publications

The Late Jurassic to Early Cretaceous Strike‐Slip Faults in the Subei‐South Yellow Sea Basin, Eastern China: Constraints From Seismic Data

The Late Jurassic to Early Cretaceous Strike‐Slip Faults in the Subei‐South Yellow Sea Basin, Eastern China: Constraints From Seismic Data

‘Non‐European’ palaeomagnetic directions from the Carpathian Foredeep at the southern margin of the European plate

Timing of granitic magma mixing in the southeastern Gyeongsang Basin, Korea: SHRIMP-RG zircon data

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