Post-Deccan Trap stress reorientation under transpression: Evidence from fault slip analyses from SW Saurashtra, Western India

Vanik, Naimisha; Shaikh, Mohamedharoon A.; Mukherjee, Soumyajit; Maurya, D. M.; Chamyal, L. S.

doi:10.1016/j.jog.2018.06.004

Cited by 34 publications

(9 citation statements)

References 44 publications

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“…The paleo‐stress analysis result yields that site 73 is characterized by σ1: 66/245, σ2: 00/336 and σ3: 54/066 with R / = 2.5 (Figure 13), indicating the formation of the NW‐trending folds dominated by NE–SW‐directed compression. At site 74, a set of striations associated with synfolding deformation developed on the interlayer sliding surfaces (Figure 12e,f), indicating oblique upward movement of the respective outer limbs ascribed to the steps or peaks face upslope (Billings, 1942; Vanik et al, 2018). The paleo‐stress analysis result yielded that site 74 is characterized by σ1: 32/061, σ2: 00/331 and σ3: 58/240 with R / = 2.5 (Figure 13), representing a NE–SW compressive stress regime.…”

Section: Kinematic Analysis and Paleo‐stress Inversion Resultsmentioning

confidence: 99%

“…(Figure 12e,f), indicating oblique upward movement of the respective outer limbs ascribed to the steps or peaks face upslope (Billings, 1942;Vanik et al, 2018). The paleo-stress analysis result yielded that site 74 is characterized by σ1: 32/061, σ2: 00/331 and σ3: 58/240 with R / = 2.5 (Figure 13), representing a NE-SW compressive stress regime.…”

Section: Nandan Areamentioning

confidence: 99%

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Paleo‐stress reconstruction and implications for the Mesozoic tectonic evolution of the Guizhong Depression, South China Block

Cui,

Wang,

Zhang

et al. 2024

Geological Journal

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The tectonic deformation reaction to multi‐plate convergence in the northern Guizhong Depression, as well as its geodynamic process, remain poorly understood. Two phases of intracontinental deformation are identified using field geological investigations, paleo‐stress inversion and seismic reflection sections: (1) early NE–SW‐directed compression during the Middle Triassic to Early Jurassic; (2) later NW–SE‐directed compression during the Middle Jurassic to Early Cretaceous. The reconstruction of paleo‐stress provides robust constraints on the spatiotemporal evolution of stress within the Guizhong Depression. The regional SW–NE‐directed compression during the Middle Triassic to Early Jurassic was driven by the collision and convergence between the Indochina and South China blocks, resulting in the formation of NW–SE‐directed compressional structures during the Indosinian Period. The later SE–NW‐directed paleo‐stress field was probably driven by the NW‐directed subduction of the Paleo–Pacific Plate during the Middle Jurassic to Early Cretaceous.

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Section: Kinematic Analysis and Paleo‐stress Inversion Resultsmentioning

confidence: 99%

Section: Nandan Areamentioning

confidence: 99%

Paleo‐stress reconstruction and implications for the Mesozoic tectonic evolution of the Guizhong Depression, South China Block

Cui,

Wang,

Zhang

et al. 2024

Geological Journal

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“…Brittle deformation is most commonly manifested by the development of mesoscale joints. The dynamic palaeostress analysis of such brittle structures is critical for determining the regional palaeostress conditions that exist in the study area (e.g., Dutta et al, 2019; Maurya, Shaikh, & Mukherjee, 2021; Shaikh et al, 2020; Vanik, Shaikh, Mukherjee, Maurya, & Chamyal, 2018). We investigate palaeostress conditions using structural data consisting of 141 joint planes collected in the field (Figure 2).…”

Section: Methodsmentioning

confidence: 99%

Brittle tectonics in the western Arunachal Himalayan frontal fold belt, northeast India: Change in stress regime from pre‐collisional extension to collisional compression

et al. 2022

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The study of brittle deformation of the collisional mountains can explain its shallow crustal tectonic evolution and the palaeostress regime. The Main Boundary Thrust (MBT) zone in the western Arunachal Himalaya displays imbrication in the Permian Gondwana sequence between the MBT‐1 (/Bome Thrust/MBT‐Upper) in the north and MBT‐2 (/MBT‐Lower) in the south with consistent northerly dip. The Lower Gondwana rocks occur in the footwall of the MBT‐1 with the Proterozoic Bomdila Group in the hangingwall. The upper Gondwana rocks constitute the hangingwall sequence for the MBT‐2 with Neogene Siwalik rocks in the footwall. This article analyses palaeostress using brittle fractures in the Gondwana rocks that crop out for ~120 km2 in the study area. The fault‐bounded imbricate zone depicts eight brittle shear indicators and four sets of joints (J1 and J2: inclined and J3 and J4: subvertical). The signatures of the inherited pre‐Himalayan extensional deformation are preserved in the Lower Gondwana Miri Formation. The Bichom and Bhareli rocks exhibit brittle deformation features of the Himalayan Orogeny under strong ~N‐S compression. The palaeostress analysis of all joint sets indicates three phases of brittle deformation in the Gondwana and Siwalik rocks of the area. The subvertical joint sets and normal faults in the Miri Formation indicate a north‐northwest (NNW)‐directed extensional phase of the pre‐Himalayan origin. The inclined joint sets of the Bichom and Bhareli formations of the Gondwana sequence depict Himalayan orogeny with ~N‐S compressional phases. The third phase of brittle deformation in the Siwalik sequence depicts an east‐west (~E‐W) extension. The arc‐parallel extension in the frontal fold belt of the Arunachal Himalaya may be due to oblique India‐Asia collisional tectonics.

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“…This software requires as inputs, the geometrical parameters of planes (Dip direction/dip) and striae on planes, as well as fault type and the precision for each plane measurement. Three methods are proposed for the calculation of tensors namely: 1) Direct Inversion [37] [38] [39] [40]; 2) Numerical Dynamical Analysis (NDA; [41], review in [42]); and the 3) Dihedra calculation [43] [44] [45]. The Direct Inversion methods are used for inherited faults systems [44] [46], while the NDA allows determining the parameters of deformation axes rather than stressing characteristics.…”

Section: Main Lithological Characteristics Of Tohoun Sandstonesmentioning

confidence: 99%

Evidence of Atlantic Extension in South-East Togo: Case of Fracturing in the Sandstone Relics of Tohoun

Padaro¹,

Tairou²,

Costa³

et al. 2021

IJG

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The sandstone relics of probable Cretaceous age found around Tohoun show an extensional tectonics imprint associated with the Atlantic opening. This imprint consists of normal fault networks well expressed on two sites of outcrop and corresponds to three fracturing episodes materialized by families of conjugated planes striking E-W, NW-SE, and NE-SW. Striated plane data analysis shows three extensional axes successively N-S, NE-SW and NNW-SSE. The reconstructed paleostress tensors can be attributed to pre-to syn-rift phases responsible for the development of primary basin structures in the Gulf of Guinea. This preliminary analysis, concerning only fractures in the basal sequence relics, remains to be extended to the entire Togolese coastal basin to a better definition of the Atlantic dynamic.

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Post-Deccan Trap stress reorientation under transpression: Evidence from fault slip analyses from SW Saurashtra, Western India

Cited by 34 publications

References 44 publications

Paleo‐stress reconstruction and implications for the Mesozoic tectonic evolution of the Guizhong Depression, South China Block

Paleo‐stress reconstruction and implications for the Mesozoic tectonic evolution of the Guizhong Depression, South China Block

Brittle tectonics in the western Arunachal Himalayan frontal fold belt, northeast India: Change in stress regime from pre‐collisional extension to collisional compression

Evidence of Atlantic Extension in South-East Togo: Case of Fracturing in the Sandstone Relics of Tohoun

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