Quaternary tectonic history of seismically active intraplate Kachchh Rift Basin, western India: A review

Kothyari, Girish Ch; Kandregula, Raj Sunil; Dumka, Rakesh K.; Chauhan, Gaurav; Taloor, Ajay Kumar

doi:10.1016/j.geog.2021.09.011

Cited by 8 publications

(5 citation statements)

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“…Increments of subsidence on modern rift‐basin faults are generally more frequent (1 to 6 ka) than average cycle duration and involve vertical slip of not more than a few metres (e.g. Kothyari et al ., 2022), even in rifts with long Quaternary records (e.g. Stahl et al ., 2020; Arzhannikova et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south‐east Canada

Tang,

Pe‐Piper,

Piper

et al. 2023

Sedimentology

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Upper Palaeozoic lacustrine basin deposits not only record local tectonism but are also an archive to evaluate global palaeoclimate changes linked to the Late Palaeozoic Gondwanan ice age. The Tournaisian Horton Group of Nova Scotia, south‐east Canada, accumulated in rift basins following the final accretion of peri‐Gondwanan terranes to the Appalachians. Sedimentology, mineralogy and geochemistry of the well‐exposed sandstones and shales at the classic Blue Beach section (ca 353.5 to 352 Ma) reveal the interplay of local tectonism and global climatic controls on lacustrine sedimentation. The lacustrine depositional environment gradually transitioned from deep water offshore at the base of the section to wave‐dominated and fluvial‐dominated nearshore at the top. Multiple small transgressive‐regressive sedimentation cycles have an average 21 ka duration, likely related to Milankovitch cyclicity. Unusually abundant soft‐sediment deformation structures (SSDS) and landslides are the sedimentary responses to frequent earthquakes during the most active phase of rift subsidence. The overall succession shows changes from a shallowing‐up balanced‐filled to an overfilled lacustrine basin. The chemical weathering intensity index and the Th/K ratio show a longer‐term trend from dry and cool conditions low in the section to humid and warm conditions near the top, with rapid change in the transition period. The section records the peak of the global mid‐Tournaisian carbon isotope excursion and the corresponding cooling event (354 Ma to approximately 351 Ma). The sedimentary succession is a response to long‐ and short‐term climatic cycles influencing lake level and sediment supply during the time of maximum rift basin subsidence recorded by the soft‐sediment deformation structures.

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Section: Discussionmentioning

confidence: 99%

Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south‐east Canada

Tang,

Pe‐Piper,

Piper

et al. 2023

Sedimentology

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“…Mishra and Zhao (2003) identified a left‐lateral component with reverse faulting for the event (M7.7) of 2001. The vertical dip of SWF and KMF is identified by geological as well as by geophysical studies (Biswas, 1987, 2005, 2014; Kothyari et al, 2022; Mohan et al, 2017). The thought of intra‐basin stress is recognized by Biswas (2005) and proposed that the Radhanpur Arch or NNW trending Radhanpur ‐ Barmer basement arch is acting as a barrier for the extension of KRB.…”

Section: Resultsmentioning

confidence: 99%

“…Mishra and Zhao (2003) identified a left-lateral component with reverse faulting for the event (M7.7) of 2001. The vertical dip of SWF and KMF is identified by geological as well as by geophysical studies (Biswas, 1987(Biswas, , 2005(Biswas, , 2014Kothyari et al, 2022;Mohan et al, 2017).…”

Section: Grace Observationsmentioning

confidence: 99%

“…The detailed geological investigation by (Biswas, 1987(Biswas, , 2005(Biswas, , 2014Kothyari et al, 2019Kothyari et al, , 2022McCalpin & Thakkar, 2003;Pande et al, 2003) followed by few geophysical investigations (Mandal et al, 2004;Mohan et al, 2017;Pavan et al, 2017;Singh et al, 2017;Suribabu et al, 2022) concluded that these faults are vertical to near vertical in nature. The geological and geomorphic investigations suggest SWF as a near-vertical step-over fault of KMF (Biswas, 2005; F I G U R E 1 Study area map towards the western part of India, depicting fault systems of Kachchh region along with the location of major earthquakes (red star) triggered during last two centuries.…”

Section: Introductionmentioning

confidence: 99%

“…This part is the host of the recent M7.7 (2001) earthquake and thereafter a few moderate earthquakes. The detailed geological investigation by (Biswas, 1987, 2005, 2014; Kothyari et al, 2019, 2022; McCalpin & Thakkar, 2003; Pande et al, 2003) followed by few geophysical investigations (Mandal et al, 2004; Mohan et al, 2017; Pavan et al, 2017; Singh et al, 2017; Suribabu et al, 2022) concluded that these faults are vertical to near vertical in nature. The geological and geomorphic investigations suggest SWF as a near‐vertical step‐over fault of KMF (Biswas, 2005; Kothyari et al, 2017; Kothyari, Dumka, et al, 2016) and fault plane study of 2001 main event by (Negishi et al, 2002) established SWF as a causative fault (Kothyari et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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GPS and InSAR derived evidences of intra‐basin stress and strike‐slip tectonics in the vicinity of 2001 (M7.7) earthquake, Kachchh, western India

et al. 2022

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The current geodetic investigation is based on nearly a decade of continuous Global Positioning System (GPS) data towards the western part of the Indian Plate (2009–2019). This research focused on the Kachchh Rift Basin (KRB), the seismically most active intra‐plate region of the Indian Plate, which has seen three ≥ M 7.0 earthquakes in the last two centuries. The GPS stations on the northern and southern margins show SSW and NNE directed motion, indicating that the KRB is currently under the influence of regional compressive stress on both flanks and the same is reflected in the form of earthquake activity in the center portion. Furthermore, the existence of intra‐basin stress, in addition to regional stress, increases strain accumulation and results in the creation of a Principal Deformation Zone (PDZ) in the central part of the KRB. The average annual deformation in the middle of KRB remains 1.0 ± 0.5 mm/year, while sites near the South Wagad Fault (SWF) experience 1.2 mm/year of fault parallel motion. The dominant fault normal motion along the flanks with a maximum fault parallel motion in the middle intimates the existence of strike‐slip tectonics in the central Kachchh. The geometric relationship of strike‐slip faults in a compressive margin and strain accumulation in pre‐existing faults (PDZ) is responsible for current strike‐slip and thrust motion in the Kachchh, including the 2001 Bhuj earthquake (M 7.7). Our geodetic model is well‐corroborated with the geological observations of the wrench fault model of strike‐slip faults. PS‐InSAR results in the northern part of the region between Khadir and Bela Islands show ≤6.0 mm of annual LOS displacement. GPS results indicate ≈ 1.3 to 1.4 ± 0.5 mm/year of fault parallel motion along the transverse Ekal Amrapar Fault (EAF). The non‐significant variation in GRACE‐derived TWS values (from 2009 to 2018) rules out non‐tectonic deformation in the vicinity of EAF and thus points to tectonic activity as the cause of the derived deformation in the region.

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Editorial note for the Geodesy and Geodynamics journal special issue: Remote Sensing and GIS applications in crustal deformation and neotectonics

Taloor

Kothyari

Zhao

et al. 2022

Geodesy and Geodynamics

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Quaternary tectonic history of seismically active intraplate Kachchh Rift Basin, western India: A review

Cited by 8 publications

References 44 publications

Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south‐east Canada

Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south‐east Canada

GPS and InSAR derived evidences of intra‐basin stress and strike‐slip tectonics in the vicinity of 2001 (M7.7) earthquake, Kachchh, western India

Editorial note for the Geodesy and Geodynamics journal special issue: Remote Sensing and GIS applications in crustal deformation and neotectonics

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