Multiple faulting events revealed by trench analysis of the seismogenic structure of the 1976 Ms7.1 Luanxian earthquake, Tangshan Region, China

Guo, Hui; Wa-li, Jiang; Xie, Xiao‐Bi

doi:10.1016/j.jseaes.2017.06.004

Cited by 12 publications

(13 citation statements)

References 7 publications

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“…Our estimate of motion across the Tanlu fault supports a relatively long seismic interval of ∼10 ka, comparable to those inferred from recent paleoseismic research on this fault (K. Li et al., 2019; Shu et al., 2020) and other slow‐slip faults (Guo et al., 2017) in the NCC. Our analysis suggests that the faults in the NCC even with very slow motions may still have the potential to produce strong earthquakes since the Holocene.…”

Section: Discussionsupporting

confidence: 87%

“…(2019). Our inference of the recurrence interval for the Tanlu fault is also close to that across the Yilan‐Yitong fault in northeast China (Shu et al., 2020) and similar to those along other slow‐slip faults in this region (Guo et al., 2011, 2017).…”

Section: Discussionsupporting

confidence: 83%

“…Li et al, 2019), the strike-slip motion of ∼0.9 mm/ yr derived in this study also supports a long interval of ∼10 ka, consistent with recent paleoseismic research of K. Li et al (2019). Our inference of the recurrence interval for the Tanlu fault is also close to that across the Yilan-Yitong fault in northeast China (Shu et al, 2020) and similar to those along other slow-slip faults in this region (Guo et al, 2011(Guo et al, , 2017.…”

Section: Moment Deficits and Implications For Seismic Hazard Assessmentssupporting

confidence: 91%

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Block Kinematics in North China From GPS Measurements

Wang

Zhao

Qiao

et al. 2022

Geochem Geophys Geosyst

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North China, commonly known as the North China Craton (NCC), is an important tectonic element in eastern China (R. Zhu et al., 2011Zhu et al., , 2012. This region is characterized by complex tectonic setting, intense seismic activity and dense population (Deng et al., 2003). Unlike the Tibetan Plateau situated in western China, where numerous active faults exhibit fast motions and significant deformation, the faults in the NCC generally have slow motions (Deng et al., 2002). However, numerous strong earthquakes have occurred in this region during the past hundred years, including the 1976 M 7.8 Tangshan event that has caused huge casualties (P. Zhang et al., 2013). In this context, quantifying the faulting kinematics and slip partitioning holds great significance for seismic risk assessments.Over the past decades, numerous studies have been conducted on the tectonic processes and deformation mechanisms in the NCC. For example, it has been suggested that most deformation features in the NCC can be explained as the combined effects of the India-Eurasia collision and Pacific subduction (Ye et al., 1987;Yin, 2010); however, the relative significance involving with these two factors remains unclear. Moreover, several studies have proposed that the late Cenozoic tectonics in this region is mainly characterized by widespread rifts that have caused intensive extensional deformation (Y. Q. Zhang et al., 1998

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Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 83%

Section: Moment Deficits and Implications For Seismic Hazard Assessmentssupporting

confidence: 91%

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Block Kinematics in North China From GPS Measurements

Wang

Zhao

Qiao

et al. 2022

Geochem Geophys Geosyst

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“…In recent years, trenches have been excavated beneath surface cracks in the Sunjialou area (blue rectangular area in Figure 2) (Guo et al, 2011, Guo et al, 2017Guo and Zhao, 2019). Here, the cracks are unique, with a subsidence zone observed on the southeastern side of the right-lateral strike-slip, en-echelon surface cracks, and ~700 m long and 100 m wide (Figure 2).…”

Section: Ground Fissure Zonementioning

confidence: 99%

“…10 Middle School revealed a near-vertical fault beneath the surface cracks, with a dip angle >83 °and a middle Pleistocene vertical throw of 40 m (Liu et al, 2013). Moreover, Guo et al (2011) analyzed a composite drilling profile and an exploratory trench in Sunjialou, Tangshan, and proposed that the seismogenic fault of the Tangshan earthquake was a normal fault (Guo et al, 2011, Guo et al, 2017Guo and Zhao, 2019).…”

Section: Introductionmentioning

confidence: 99%

Detailed shallow structure of the seismogenic fault of the 1976 Ms7.8 Tangshan earthquake, China

Liu

Nan

et al. 2022

Front. Earth Sci.

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In 1976, an Ms7.8 strong earthquake occurred in the Tangshan region of Northeast China within an ancient craton. In this study, we conducted shallow seismic exploration, drilling-based exploration, and exploratory trench excavation of ground fissures in the Tangshan Fault Zone and obtained a high-resolution shallow seismic profile. Through analysis of its lithology and sedimentary cycle, we constructed a composite drilling profile across the faults. Coupled with the shallow fault combination patterns identified from the exploratory trenches, the profile reveals that the Guye-Nanhu Fault was the shallow response fault in the seismogenic structure of the Tangshan earthquake. This fault is a strike-slip fault with a positive flower structure; the reverse fault branches become progressively steeper with depth and converge downward toward the vertical main strike-slip fault. A high-angle thrust fault is located to the west of the main strike-slip fault, and a series of small-scale normal faults appear in front of this fault, owing to local extension. The tectonic form revealed by the deep seismic reflection profiles further supports the superficial tectonic model. The near-NEE orientation of the stress field in North China and the lower strike-slip movement component of the Tanlu Fault Zone facilitate faulting in the Tangshan–Hejian–Xingtai Fault Zone, which lies diagonally in the middle rectangular area of the North China Plain faulted basin. The detailed structural model of the seismogenic fault obtained by various detection methods is of great significance for understanding the seismogenic mechanism of the Tangshan earthquake.

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Sediment Structures Constrained by Converted Waves From Local Earthquakes Recorded by a Dense Seismic Array in the Tangshan Earthquake Region

Bao

Tian

et al. 2021

Pure Appl. Geophys.

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Multiple faulting events revealed by trench analysis of the seismogenic structure of the 1976 Ms7.1 Luanxian earthquake, Tangshan Region, China

Cited by 12 publications

References 7 publications

Block Kinematics in North China From GPS Measurements

Block Kinematics in North China From GPS Measurements

Detailed shallow structure of the seismogenic fault of the 1976 Ms7.8 Tangshan earthquake, China

Sediment Structures Constrained by Converted Waves From Local Earthquakes Recorded by a Dense Seismic Array in the Tangshan Earthquake Region

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