Paleostress analysis of the Pohang-Ulsan area, Southeast Korea: tectonic sequence and timing of block rotation

Choi, Pom-yong; Kwon, Seok-Ki; Hwang, Jaewon; Lee, Seung Ryeol; An, Gi-O

doi:10.1007/bf02910169

Cited by 19 publications

(10 citation statements)

References 27 publications

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“…As mentioned above, Event 5 is the more recent faulting event recognized at four sites among five, and possibly related to the current tectonics. In regional scheme, the current compressive directions of Southeast Korea show the ENE–WSW to east–west direction (Jun 1991; Choi 1996; Choi et al . 2001, 2007; Park et al .…”

Section: Discussionmentioning

confidence: 99%

“…As to the Neogene tectonics of the Korean peninsula, regional compression direction displays a gradual change from WNW–ESE in the Late Miocene through east–west in the Pliocene to ENE–WSW in the Quaternary (Choi 1996; Choi et al . 2001, 2002a, 2007; Fig.…”

Section: Introductionmentioning

confidence: 99%

“…2001, 2007; Park et al . 2007; see also Eguchi 1983), while that of the Philippine Sea tectonic domain produces the northwest–southeast to WNW–ESE compression in the Pohang–Ulsan area (Choi et al . 2001, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Fault tectonic analysis of Kii peninsula, Southwest Japan: Preliminary approach to Neogene paleostress sequence near the Nankai subduction zone

2011

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The southern part of the Outer Zone of Southwest Japan including the Kii peninsula belongs to the tectonic 'shadow zone', where fewer conspicuous active faults and less Quaternary sediments develop than in the Nankai subduction zone and Inner Zone of Southwest Japan. In order to study the paleostress sequence of the Kii peninsula, we analyzed fault-slip data and tension gashes at pilot sites of Early-Middle Miocene forearc sediments and Late Cretaceous accretionary complex. According to the results, six faulting events are reconstructed in sequence: (i) east-west extension (normal faulting); (ii) eastwest compression and north-south extension (strike-slip faulting); (iii) NNW-SSE compression and ENE-WSW extension (strike-slip faulting); (iv) northeast-southwest compression and northwest-southeast extension (strike-slip faulting); (v) WNW-ESE compression (strike-slip or reverse faulting); and (vi) NNE-SSW extension. The northsouth to NNW-SSE trending dyke swarm of Middle Miocene age in the Kii peninsula is thought to be related to Event 3, implying that Event 3 was active at least during the Middle Miocene. Because Event 6 is recognized solely at a site, the overall latest faulting event seems to be Event 5. Assuming that the compression results from the motion of the crust or plate, the compression direction of Event 5 is in good accordance with the presentday WNW crustal velocity vectors of the Kii peninsula. The stress trajectory map of Southeast Korea and Southwest Japan reveals that the current compression directions of the Kii peninsula correspond to the combinatory stress fields of the Himalayan and Philippine Sea tectonic domains.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fault tectonic analysis of Kii peninsula, Southwest Japan: Preliminary approach to Neogene paleostress sequence near the Nankai subduction zone

2011

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“…The established tectonic history is compared with that in the literature (e.g. Choi et al, 2001;Yoon and Chough, 1995).…”

Section: Methodsmentioning

confidence: 99%

Cenozoic deformation history of the area around Yangnam-Yangbuk, SE Korea and its tectonic significance

Kim

Park

2006

Journal of Asian Earth Sciences

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“…The reconstruction of either the palaeostress or the palaeostrain tensor from fault slip data has a long history but is not yet considered a mature field of structural geology (Simon, 2019). Nevertheless, palaeostress and palaeostrain H. van Gent and J. L. Urai: Abutting faults 517 reconstructions have added significantly to our toolbox to understand brittle deformation in the crust (Angelier, 1985;Angelier et al, 1985;Bles et al, 1989;Kleinspehn et al, 1989;Choi et al, 2001;Vandycke, 2002;Dyksterhuis et al, 2005;Martínez-Martínez, 2006;Bozkurt Çiftçi and Bozkurt, 2007;Balsamo et al, 2008;Sippel et al, 2009;van Gent et al, 2009van Gent et al, , 2010b. Many of these studies draw inferences from the first-order, regional-scale stress fields (Gölke and Coblentz, 1996;Gruenthal and Stromeyer, 1994;Warners-Ruckstuhl et al, 2013).…”

Section: Palaeostress and Palaeostrainmentioning

confidence: 99%

Abutting faults: a case study of the evolution of strain at Courthouse branch point, Moab Fault, Utah

Gent

Urai

2020

Solid Earth

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Abstract. Slip planes and slip directions of subsequent generations of faults were measured and analysed in the interaction damage zone of two abutting faults in porous sandstones in order to understand the palaeostress/palaeostrain evolution. The Courthouse branch point of the Moab Fault in SE Utah (USA) is a much-studied, spectacular outcrop of two abutting faults, located in the footwall block of the main fault and in the hanging wall block of the abutting fault. The abutting fault is synthetic to the main fault. The outcrop shows a wide range of deformation structures and fault-related diagenesis such as striated slip planes, deformation bands, veins, Liesegang bands and copper-rich mineralization. By combining our own measurements with published data on the relative age of these structures, we classified the data in four sets. Using a Numeric Dynamic Analysis (NDA) to calculate the orientation of the kinematic axes we found three different palaeo-extension directions in the four sets, recording the evolution of stress/strain axes during the abutting process. The first phase of deformation is regional extension in the NE–SW direction. As the second fault approached the main fault from its footwall side and the two faults started to become kinematically linked, the extension direction changed so that the overall extension became perpendicular to the approaching fault (NW–SE). Finally, the extension direction changed back to being perpendicular to the first segment (NE–SW) when the two faults became geometrically linked and regional extension became dominant again.

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Paleostress analysis of the Pohang-Ulsan area, Southeast Korea: tectonic sequence and timing of block rotation

Cited by 19 publications

References 27 publications

Fault tectonic analysis of Kii peninsula, Southwest Japan: Preliminary approach to Neogene paleostress sequence near the Nankai subduction zone

Fault tectonic analysis of Kii peninsula, Southwest Japan: Preliminary approach to Neogene paleostress sequence near the Nankai subduction zone

Cenozoic deformation history of the area around Yangnam-Yangbuk, SE Korea and its tectonic significance

Abutting faults: a case study of the evolution of strain at Courthouse branch point, Moab Fault, Utah

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