Cenozoic evolution of the Tan–Lu Fault Zone (East China)—Constraints from seismic data

Huang, Lei; Liu, Chiyang; Kusky, Timothy M.

doi:10.1016/j.gr.2014.09.005

Cited by 85 publications

(66 citation statements)

References 71 publications

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“…Meanwhile, this fault reactivation at about 40 Ma induced significant structural inversion along the fault zone, which can be well reflected by the pop‐up or positive flower structures at the fault restraining bends and stopovers (Huang et al, , ). Our previous studies revealed that all the anticlines in flower structures initiated during and after this inversion at the fault restraining bends and stopovers (Huang et al, , ). In other words, the switch of stress field at about 40 Ma triggered the shortening at the fault restraining bends and step overs along the fault zone.…”

Section: Discussionmentioning

confidence: 99%

“…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%

“…General stratigraphy of the Bohai Bay showing major tectonic and depositional events. The evolutionary history of the TLFZ is after Huang et al ().…”

Section: Study Area and Datamentioning

confidence: 99%

“…The thick dotted lines in interpreted sections present the strata boundary corresponding to ~40 Ma. Note that a significant structural inversion occurring between early and late Paleogene (at about 40 Ma) can be observed in the positive flower structures; this structural inversion was characterized by the combination of normal fault separation on its lower segment and reverse fault separation on its upper segment and by the superimposition of anticlinal bending of the upper strata (upper Paleogene) and synclinal bending of lower strata (lower Paleogene); and the shallow anticline shows a continuous development; it was suggested that this inversion was caused by the onset of the dextral strike‐slip motion of the TLFZ at about 40 Ma (Huang et al, ). For locations, see Figure b.…”

Section: Characteristics Of the Three Flower Structure Typesmentioning

confidence: 99%

“…This claim is also supported by the following fact. Abundant oblique extensional structures (i.e., negative flower structure) along the straight sections of the TLFZ indicate the dextral transtension on this wrench fault zone (Huang et al, , ), and these structures were developed continuous without any imprint of inversions on faults and strata (Figure ), indicating the absence of switch from oblique normal faulting to oblique reverse faulting along this fault zone. Furthermore, we suggest that these inversions contain several independent ones which might occur at the same time, while each inversion is very local and has a very limited influenced area, only affects a few faults.…”

Section: Kinematic Analysis On Hybrid Flower Structuresmentioning

confidence: 99%

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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: Discussionmentioning

confidence: 99%

Section: Study Area and Datamentioning

confidence: 99%

“…General stratigraphy of the Bohai Bay showing major tectonic and depositional events. The evolutionary history of the TLFZ is after Huang et al ().…”

Section: Study Area and Datamentioning

confidence: 99%

Section: Characteristics Of the Three Flower Structure Typesmentioning

confidence: 99%

Section: Kinematic Analysis On Hybrid Flower Structuresmentioning

confidence: 99%

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

Huang

Liu

2017

JGR Solid Earth

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Early Paleogene strike‐slip transition of the Tan–Lu Fault Zone across the southeast Bohai Bay Basin: Constraints from fault characteristics in its adjacent basins

Wang

et al. 2018

Geological Journal

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The Tan–Lu Fault Zone (TLFZ) is the largest continental‐scale strike‐slip fault zone in East China. It experienced a complex Meso‐Cenozoic deformation and controlled the development and evolution of the Bohai Bay Basin (BBB). Though its Mesozoic sinistral and Cenozoic dextral motions have been well documented, its strike‐slip transition history and mechanism from sinistral to dextral motions in the Early Paleogene remain poorly understood. To investigate these issues, we made a thorough analysis on the fault geometry and kinematics as well as the response of depocentre in the Early Paleogene of the sags adjacent to the TLFZ across the southeast BBB. The results show that the WNW‐/NW‐, E‐W‐, and ENE‐/NE‐trending extensional faults developed in the Early Paleogene of those sags share almost the same geometrical and kinematic features. Such features indicate that the TLFZ is sinistral in Ek3‐Ek2 depositional stage, extension dominated in Ek1 depositional stage, and dextral in Es4L depositional stage. Such strike‐slip transition of the TLFZ is a comprehensive effect of the plate events around the Eurasian Plate. The NNW‐directed subduction of the Pacific to the Eurasian plates triggers the sinistral motion of the TLFZ during 65–55 Ma, but this sinistral motion is terminated by the far‐field effect of the NNE‐directed India–Eurasia collision initiating at 55 Ma. Then, the kinematic adjustment of the Pacific Plate from NNW to WNW breaks the stress balance exerted on the TLFZ by the subduction of the Pacific to Eurasian plates and the India–Eurasia collision and makes it turn into dextral motion gradually during 48–42 Ma.

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Geometry, differential displacement, and evolution of the Cenozoic fault system in the western offshore Bohai Bay Basin: A case study in the Shaleitian Uplift with surrounding areas

Liu

Lin

et al. 2020

Geological Journal

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The western offshore Bohai Bay Basin (BBB) is located at the intersection of the Zhangjiakou–Penglai Fault Zone (ZPFZ) and the Huanghua–Dongming Fault Zone (HDFZ). Exploration experience proves that faults' activity played an import role in hydrocarbon accumulation, whereas characters and evolution of the fault system remain poorly understood. In this study, characters and evolution of the fault system were investigated through abundant seismic data from oil fields. Six NE and two NW strike‐slip faults were identified by composite flower structures on seismic profiles and show broom‐like or en echelon patterns with different scales in plan view. Massive flower‐like structures were observed, which serve as an indicator of early extension and consequent shear activity. Based on published physical modelling, the different plan forms and scales of strike‐slip faults were deciphered as an outcome of diverse strike‐slip displacements. The character and evolution of the fault system were investigated using fault activity rate, balanced restoration, and typical‐structure analysis. The result suggests that the NW‐trending faults have a more intense fault activity and strike‐slip faults in the north, and the east have larger displacements than those in the south and the west. Considered together with the basin evolution, we suggested a three‐stage fault evolution model for the fault system in the study area, mainly comprising (a) early extension; (b) mid transtension, and (c) late transpression, which resulted from multiple geodynamic events during the Cenozoic. Our study reveals that the ZPFZ and the HDFZ have a significant impact over faults in the western offshore BBB, which is demonstrated by unusual intense fault activity in the extension period and different strike‐slip displacement in the strike‐slip period.

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Cenozoic evolution of the Tan–Lu Fault Zone (East China)—Constraints from seismic data

Cited by 85 publications

References 71 publications

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

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

Early Paleogene strike‐slip transition of the Tan–Lu Fault Zone across the southeast Bohai Bay Basin: Constraints from fault characteristics in its adjacent basins

Geometry, differential displacement, and evolution of the Cenozoic fault system in the western offshore Bohai Bay Basin: A case study in the Shaleitian Uplift with surrounding areas

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