Geometry and Kinematics Characteristics of Strike-Slip Fault Zone in Complex Structure Area: A Case Study From the South No. 15 Strike-Slip Fault Zone in the Eastern Sichuan Basin, China

Cheng, Xiaoyun; Ding, Wenlong; Pan, Lei; Zou, Yutao; Li, Yuntao; Yin, Yixing; Ding, Shihao

doi:10.3389/feart.2022.922664

Cited by 9 publications

(5 citation statements)

References 49 publications

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“…The more equal are the grain size and shape, like microbeads grains, the less deformation concentrate (Antonellini et al, 1994., Mair et al, 2002. This deformation pattern was also observed by Aydin and Berryman, 2010;Li et al, 2021;Cheng et al, 2022 andVenancio andAlves Da Silva, 2023.…”

Section: Models Without Vertical Rheological Contrastsupporting

confidence: 71%

The influence of vertical lithological contrasts on strike-slip fault behavior: Insights from analogue models

González-Muñoz,

Schreurs,

Schmid

et al. 2024

Preprint

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Abstract. This work investigates the influence of rheological contrasts on the nucleation and behavior of strike-slip faults. To achieve this, we have carried out a series of brittle-viscous strike-slip shear analogue models, using quartz sand and microbeads as granular materials with different internal friction and cohesion values. Particle Imaging Velocimetry (PIV) was applied to time-series of surface images to calculate incremental and cumulative strains. Understanding how strike-slip faults nucleate and interact in the heterogeneous upper crust is relevant in seismic hazard analysis and geothermal and hydrocarbon exploration. To reproduce the heterogeneity of the upper crust, three sets of experiments we performed: 1) upper layer composed either of quartz sand or microbeads; 2) upper layer with a vertical contrast i.e., quartz sand surrounded by microbeads and vice-versa; and 3) same set-up as in the previous set but changing the orientation of the vertical contrast. Our study shows that the introduction of an upper crustal vertical contrast influences the behavior and evolution of strike-slip faults. The models containing a vertical contrast were more complex and induced a compartmentalization of the model. The initial fault strike is related to the material’s properties. However, this initial strike changes when faults crosscut the materials with less internal friction angle clockwise, and anticlockwise when the contrast has higher internal friction angle. Areas containing materials with less internal friction angle take longer to localized the deformation, but they show a greater number of faults. The biggest increase in the number of synthetic and antithetic faults occurs with the introduction of vertical contrast. These results were compared with the intraplate fault systems of the NW Iberian Peninsula, focusing on the Penacova-Régua-Verin and Manteigas-Vilariça-Bragança fault systems. They are major left-lateral faults that cross-cut lithologies characterized by vertical rheological contrasts, with deformation patterns similar to those observed in our analogue models.

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Section: Models Without Vertical Rheological Contrastsupporting

confidence: 71%

The influence of vertical lithological contrasts on strike-slip fault behavior: Insights from analogue models

González-Muñoz,

Schreurs,

Schmid

et al. 2024

Preprint

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“…Compressional thrusting fails to explain the reverse and normal separation along the same faults neither, which are observed not only in different profiles perpendicular to the fault strike but also at varying depths. In contrast, these observed structural patterns, namely the dolphin and ribbon effects, are distinct indicators of strike-slip faults and are associated with the complexities of fault geometry and dip-slip kinematics along the fault strike (Zolnai, 1991;Liu et al, 2017;Liang et al, 2020;Cheng et al, 2022). Therefore, we suggest that it is strike-slip faulting rather than thrusting that dominates these fault belts.…”

Section: Discussionmentioning

confidence: 68%

Evolution of kinematic transformation from the Altyn Tagh fault to the Qilian Shan in the northern Tibetan Plateau: from early Cenozoic initiation to mid-Miocene extrusion

Yang,

Wang,

Liu

et al. 2023

Front. Earth Sci.

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The Altyn Tagh fault has been a crucial tectonic boundary of the Tibetan Plateau during the Cenozoic India-Eurasia collision. However, issues have not been addressed regarding the Cenozoic evolution of the kinematic transformation from the eastern Altyn Tagh fault to the Qilian Shan. Here we focus on the kinematics at a crucial point, the Subei triple junction, along the Altyn Tagh fault, which was recorded by faulting in the Suganhu basin to the south of the junction. We reconstructed the structural pattern of faults and thickness distribution of the Cenozoic strata in the Suganhu basin by integrating seismic profiles, well logging, and topographic data. We inferred that only crustal shortening and thickening in the Danghenan Shan, a prominent topographic high, absorbed the strike-slip displacement along the Altyn Tagh fault during the early Cenozoic. Since the mid-Miocene, strike-slip fault belts within the Suganhu basin were initiated, based on the fault geometry and uneven thickness distribution across the fault belts. We thus proposed a mid-Miocene kinematic transformation realized by blocks extruding southeastward, as well as the crustal shortening and thickening in the entire Qilian Shan. Those blocks are bounded by preexisting weaknesses with lateral movements, and lithospheric heterogeneity played an essential role in the block-scale extrusion.

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“…It is mainly distributed in Sichuan Province and Chongqing City, the southern part of Shaanxi, eastern portion of Guizhou and western part of Hubei. The basin is bounded by the Micang and Daba mountains in the north, the Daliang and Loushan mountains in the south, the Longmen Mountains in the west and Qiyao Mountain in the east (Liu et al 2021; Cheng et al 2022; Dong et al 2022). The Sichuan Basin is situated on a basement of pre-Sinian metamorphic and igneous rocks and contains marine and continental strata with the thickness of 6–12 km (Shi et al 2020; Zhao et al 2020; Miao et al 2022).…”

Section: Geological Settingmentioning

confidence: 99%

Paleo-trade wind directions over the Yangtze Carbonate Platform during the Cambrian–Ordovician, Southern China

Qin

et al. 2023

Geol. Mag.

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The Sichuan Basin was a part of the Yangtze Carbonate Platform (YCP) during the Cambrian–Ordovician, and marine carbonates were deposited in the basin during this interval. Although previous studies have evaluated the paleogeography, paleoclimate and paleoecology of this basin, they have primarily focused on the paleoecology and biological evolution in the basin; however, analysis of paleogeography and paleoclimate is lacking. This study integrated outcrop sedimentological and magnetic fabric data to document sedimentary differentiation and anisotropy of magnetic susceptibility (AMS) within the YCP. The aims of this study were to infer paleowind directions during each epoch of the Cambrian–Ordovician and to constrain the paleogeographic location of the YCP. The northwestern, central and southeastern sides of the YCP were characterized by high-energy deposition (e.g. sub-angular to rounded intraclasts), medium-energy deposition (e.g. sub-angular to sub-rounded intraclasts) and low-energy deposition (e.g. angular to sub-angular intraclasts), respectively. The centroid D-Kmax values for the Early, Middle and Late Cambrian were 116° ± 52°, 145° ± 57° and 159° ± 62° from the present north, respectively; corresponding values for the Early, Middle and Late Ordovician were 169° ± 70°, 139° ± 73° and 91° ± 68° from the present north, respectively. Sedimentary differentiation and AMS results indicated that the prevailing wind directions during the Early Cambrian, Middle Cambrian, Late Cambrian, Early Ordovician, Middle Ordovician and Late Ordovician were 296° ± 52°, 325° ± 57°, 339° ± 62°, 349° ± 70°, 319° ± 73° and 271° ± 68° from the present north, respectively. The present study provides evidence for the location of the YCP during the Cambrian–Ordovician via the correspondence between the paleowind directions over the YCP and the trade winds in the Northern and Southern hemispheres. The novelty of this study lies in the following aspects: (1) it integrates microfacies and AMS analyses to establish paleowind patterns; (2) it constrains the paleo-hemispheric location of the YCP during the Cambrian–Ordovician; and (3) it provides a reference for further studies of the paleoclimate and paleogeography of the YCP during the Cambrian–Ordovician.

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Geometry and Kinematics Characteristics of Strike-Slip Fault Zone in Complex Structure Area: A Case Study From the South No. 15 Strike-Slip Fault Zone in the Eastern Sichuan Basin, China

Cited by 9 publications

References 49 publications

The influence of vertical lithological contrasts on strike-slip fault behavior: Insights from analogue models

The influence of vertical lithological contrasts on strike-slip fault behavior: Insights from analogue models

Evolution of kinematic transformation from the Altyn Tagh fault to the Qilian Shan in the northern Tibetan Plateau: from early Cenozoic initiation to mid-Miocene extrusion

Paleo-trade wind directions over the Yangtze Carbonate Platform during the Cambrian–Ordovician, Southern China

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