Structural records of the Late Cretaceous–Cenozoic extension in Eastern China and the kinematics of the Southern Tan-Lu and Qinling Fault Zone (Anhui and Shaanxi provinces, PR China)

Mercier, J. L.; Vergély, P.; Zhang, Yue Qiao; Hou, Ming Jin; Bellier, Olivier; Wang, Yong Ming

doi:10.1016/j.tecto.2012.09.015

Cited by 90 publications

(60 citation statements)

References 87 publications

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“…The TLFZ is an NE trending continental‐scale strike‐slip fault zone. It is generally agreed that this fault zone experienced sinistral movement during the Mesozoic (Gilder et al, ; Xu & Zhu, ; Xu et al, ; Zhu et al, , ), while during the Cenozoic this fault zone was reactivated as a dextral strike‐slip fault (Allen et al, , ; Hsiao et al, ; Huang et al, , , ; Lin et al, ; Mercier et al, ; Zhu et al, ). The TLFZ runs through the offshore part of the Bohai Bay Basin (Figure b), a Cenozoic rift basin with two evolutionary stages (i.e., a Paleogene synrift stage and a Neogene‐Quaternary postrift stage) (Figure ), and has caused complex tectonic changes to the region including the preferential accumulation of hydrocarbons (Allen et al, , ; Chen & Nabelek, ; Gong et al, ; Huang et al, ).…”

Section: Study Area and Datamentioning

confidence: 99%

Three Types of Flower Structures in a Divergent‐Wrench Fault Zone

Huang

Liu

2017

JGR Solid Earth

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Flower structures are typical features of wrench fault zones. In conventional studies, two distinct kinds of flower structures have been identified based on differences in their internal structural architecture: (1) negative flower structures characterized by synforms and normal separations and (2) positive flower structures characterized by antiforms and reverse separations. In addition to negative and positive flower structures, in this study, a third kind of flower structure was identified in a divergent‐wrench fault zone, a hybrid characterized by both antiforms and normal separations. Negative flower structures widely occur in divergent‐wrench fault zones, and their presence indicates the combined effects of extensional and strike‐slip motion. In contrast, positive and hybrid flower structures occur only in fault restraining bends and step overs. A hybrid flower structure can be considered as product of a kind of structural deformation typical of divergent‐wrench zones; it is the result of the combined effects of extensional, compressional, and strike‐slip strains under a locally appropriate compressional environment. The strain situation in it represents the transition stage that in between positive and negative flower structures. Kinematic and dynamic characteristics of the hybrid flower structures indicate the salient features of structural deformation in restraining bends and step overs along divergent‐wrench faults, including the coexistence of three kinds of strains (i.e., compression, extension, and strike‐slip) and synchronous presence of compressional (i.e., typical fault‐bend fold) and extensional (normal faults) deformation in the same place. Hybrid flower structures are also favorable for the accumulation of hydrocarbons because of their special structural configuration in divergent‐wrench fault zones.

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Section: Study Area and Datamentioning

confidence: 99%

Three Types of Flower Structures in a Divergent‐Wrench Fault Zone

Huang

Liu

2017

JGR Solid Earth

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“…14d). Several fission-track studies, structural and sedimentological investigations, and climatic change studies have proposed that the northern margin of the Qinling Orogen was characterized by multiple stages of rapid uplift and exhumation during the Cenozoic (Kaakinen and Lunkka, 2003;Mercier et al, 2013;Li et al, 2014;Liu et al, 2013;Zhang et al, 1995Zhang et al, , 1998Zhang et al, , 2003. Our new data show that the S-NCB started to be cooled during the Eocene, as did the NQB and NW-SQB (Fig.…”

Section: Stage 4: Eocene-oligocene Cooling Historymentioning

confidence: 99%

Apatite fission-track thermochronological constraints on the pattern of late Mesozoic–Cenozoic uplift and exhumation of the Qinling Orogen, central China

Hong

et al. 2015

Journal of Asian Earth Sciences

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“…In other words, the large differences among the previous calculations of slip rates probably resulted from a lack of knowledge of the detailed geometry of the active faults, associated with a lack of reliable age constraints for the surface markers that are offset and deformed. Variation of slip-rates (extension rate of the Graben) might also be affected by the inherited Mesozoic and Cenozoic structures with complex deformation history (e.g., Mercier et al, 2013), as well as the far field effects of the India-Asian collision (e.g., Liu et al, 2004;Zhang et al, 1998).…”

Section: Slip Ratesmentioning

confidence: 99%

“…In previous studies, the active faults in this region have been traced as a simple linear structure along the Tectonophysics xxx (2014) xxx-xxx topographic boundary between the Weihe Graben and the Qinling and Huashan Mountains (e.g., Hou et al, 1998;Li and Ran, 1983;Yuan and Feng, 2010;Zhang et al, 1995), but the surface traces, structural features, and geometric distribution of the active faults were not mapped in detail and hence remained unclear. Although it has been inferred that the active faults in the Weihe Graben are dominated by normal slip (Deng et al, 2003;SSB, 1988), a large component of sinistral strike-slip movement has also been suggested (e.g., Li and Ran, 1983;Mercier et al, 2013;Wang, 1987;Zhang et al, 1998), and it seems, therefore, that the sense of tectonic movement is also a matter of debate.…”

Section: Introductionmentioning

confidence: 99%

Tectonic activity and structural features of active intracontinental normal faults in the Weihe Graben, central China

et al. 2014

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This study examines the tectonic activity and structural features of active normal faults in the Weihe Graben, central China. The Weihe Graben is an area with a high level of historic seismicity, and it is one of the intracontinental systems that developed since Tertiary in the extensional environment around the Ordos Block. Analysis of high-resolution remote-sensing imagery data, field observations, and radiocarbon dating results reveal the following: i) active normal faults are mainly developed within a zone b500 m wide along the southern border of the eastern part of the Weihe Graben; ii) the active faults that have been identified are characterized by stepwise fault scarps dipping into the graben at angles of 40°-71°; iii) there are numerous discontinuous individual fault traces, ranging in length from a few tens of meters to 450 m (generally b 200 m); iv) fault zone structures, topographic features, and fault striations on the main fault planes indicate almost pure normal-slip; and v) late Pleistocene-Holocene terrace risers, loess, and alluvial deposits have been vertically offset by up to~80 m, with a non-uniform dip-slip rate (throw-rates) ranging from~2.1 to 5.7 mm/yr, mostly 2-3 mm/yr. Our results reveal that active normal faults have been developing in the Weihe Graben under an ongoing extensional environment, probably associated with the pre-existing graben and spreading of the continental crust, and this is in contrast with the Ordos Block and neighboring orogenic regions. These results provide new insights into the nature of extensional tectonic deformation in intracontinental graben systems.

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Structural records of the Late Cretaceous–Cenozoic extension in Eastern China and the kinematics of the Southern Tan-Lu and Qinling Fault Zone (Anhui and Shaanxi provinces, PR China)

Cited by 90 publications

References 87 publications

Three Types of Flower Structures in a Divergent‐Wrench Fault Zone

Three Types of Flower Structures in a Divergent‐Wrench Fault Zone

Apatite fission-track thermochronological constraints on the pattern of late Mesozoic–Cenozoic uplift and exhumation of the Qinling Orogen, central China

Tectonic activity and structural features of active intracontinental normal faults in the Weihe Graben, central China

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