Review on the Chugaryeong Fault

Choi, Sung‐Ja; Chwae, Uee-Chan; Lee, Hee-Kwon; Song, Yoon-Gu; Kang, Il‐Mo

doi:10.9719/eeg.2012.45.4.441

Cited by 23 publications

(18 citation statements)

References 2 publications

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“…The cross-section velocity models present near-vertical strike-slip faults plane feature observed for the Chugaryeong fault (S.-J. Choi, Chwae, et al, 2012; H. Choi, Hong, . The earthquake swarms in Seoul occurred at large velocity gradient regions.…”

Section: Discussionmentioning

confidence: 93%

“…The velocity gradient maps poorly support the connect the CFZ with Singal fault in the southern Seoul metropolitan area, which has not been well resolved so far (S.-J. Choi, Chwae, et al, 2012).…”

Section: Chugaryeong Fault Zone Modelmentioning

confidence: 85%

“…The CFZ runs from Wonsan to Seoul, and extends to Boryeong (S.-J. Choi, Chwae, et al, 2012). Late Triassic to Jurassic sedimentary basins, Jurassic granite, Cretaceous sedimentary basins, and the Quaternary basalt are distributed along the CFZ.…”

Section: Geology and Datamentioning

confidence: 99%

“…There are sedimentary basins along the CFZ (S.-J. Choi, Chwae, et al, 2012). Cheorwon basin is placed near the northern Chugaryeong fault.…”

Section: Geology and Datamentioning

confidence: 99%

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Ambient Noise Tomography of Upper Crustal Structures and Quaternary Faults in the Seoul Metropolitan Area and Its Geological Implications

Kil

Hong

Chung

et al. 2021

Earth and Space Science

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We investigate the upper‐crustal seismic velocity structure in the Seoul metropolitan area, where about 20 million people live. The Chugaryeong fault zone (CFZ) is placed in this area, but the seismic hazard potential remains unclear. We conducted ambient noise tomography to illuminate the high‐resolution upper‐crustal structure in the Seoul metropolitan area. We analyzed continuous vertical seismic records for ∼5 months from a dense seismic array with 77 broadband stations. Group velocity dispersion curves and tomographic maps were extracted between 0.5 and 10 s periods. We inverted 3‐D group velocity tomography models up to a depth of ∼10 km from the group velocity maps. The shear‐wave velocity model is consistent with the geological features. High‐velocity anomalies at shallow depths are correlated with the surface topography and geology. The CFZ is located at a low velocity below the 5 km depth and presented as the simplified model. The large VS contrast regions are located beneath NS‐trending faults. The cross‐sections coincide with the near‐vertical strike‐slip faults in this area. In the southern region of the Seoul metropolitan area, low‐velocity anomalies correlate with high heat flow regions. Our results effectively suggest high resolution upper‐crustal structures and subsurface hidden faults in the urban area.

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Section: Discussionmentioning

confidence: 93%

Section: Chugaryeong Fault Zone Modelmentioning

confidence: 85%

Section: Geology and Datamentioning

confidence: 99%

“…There are sedimentary basins along the CFZ (S.-J. Choi, Chwae, et al, 2012). Cheorwon basin is placed near the northern Chugaryeong fault.…”

Section: Geology and Datamentioning

confidence: 99%

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Ambient Noise Tomography of Upper Crustal Structures and Quaternary Faults in the Seoul Metropolitan Area and Its Geological Implications

Kil

Hong

Chung

et al. 2021

Earth and Space Science

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“…1). 이들 중에서 동두천단층, 대광리단층, 동송단 층 등이 포천단층과 함께 의정부에서 모아지고, 포천 단층과 거의 평행하게 발달하고 있는 왕숙천단층은 서 울, 구리, 성남까지 연장 발달된다 (Kim, 1973;Choi et al, 2012). 한편, 추가령단층대 남측부를 지칭하는 동두천단층 (Kim, 1973)은 충남 보령까지 연장되면서 충남탄전 퇴적분지를 규제하였을 것으로 보았다 (Cluzel et al, 1991).…”

Section: 단층개요unclassified

Reactivated Timings of Some Major Faults in the Chugaryeong Fault Zone since the Cretaceous Period

Chung¹,

Song²,

Park³

et al. 2014

Economic and Environmental Geology

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Recently developed illite-age-analysis (IAA) approach has been applied to determine the multiple events for the Singal and Wangsukcheon faults in the Chugaryeong fault belt, Korea. Fault reactivated events during Late Cretaceous to Paleogene events(69.2±0.3 Ma and 27.2±0.5 Ma) for the Singal fault and of 75.4±0.8 Ma for the Wangsukcheon fault were determined by combined approach of the optimized illite-polytype quantification and the K-Ar age-dating of clay fractions separated from the fault clays. These absolute geochronological determinations of the multiple tectonic events recorded in the Chugaryeong fault belt are crucial to establish the tectonic evolution of the Korean Peninsula since Late Cretaceous.

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Crustal-scale fault systems in the Korean Peninsula unraveled by reflection seismic data

Zappalá

Malehmir

Hong

et al. 2022

Preprint

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Review on the Chugaryeong Fault

Cited by 23 publications

References 2 publications

Ambient Noise Tomography of Upper Crustal Structures and Quaternary Faults in the Seoul Metropolitan Area and Its Geological Implications

Ambient Noise Tomography of Upper Crustal Structures and Quaternary Faults in the Seoul Metropolitan Area and Its Geological Implications

Reactivated Timings of Some Major Faults in the Chugaryeong Fault Zone since the Cretaceous Period

Crustal-scale fault systems in the Korean Peninsula unraveled by reflection seismic data

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