Luminescence chronometry and geomorphic evidence of active fold growth along the Kachchh Mainland Fault (KMF), Kachchh, India: Seismotectonic implications

Mathew, George; Singhvi, A. K.; Karanth, R. V.

doi:10.1016/j.tecto.2006.05.009

Cited by 69 publications

(36 citation statements)

References 24 publications

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“…When the Indian plate collided with the Eurasian plate during mid-tertiary time, underthrusting of the Indian plate started. The collision and the associated compression resulted in the inversion of the basin and reactivation along the normal faults, fault-associated folding and increased seismicity (Biswas, 1987;Mathew et al, 2006). The basin is bounded on the N and S by the Nagar Parkar Fault (NPF) and the North Kathiawar Fault (NKF), respectively (Fig.…”

Section: Geology and Seismotectonicsmentioning

confidence: 99%

“…1), which is considered to be a highly strained zone and potential region for future earthquakes (Biswas and Khattri, 2002;Mathew et al, 2006). The study area covers the eastern strand of the Northern Hill Range (NHR), and southwestern zone of the Wagad region (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Two major thrusts, the Kachchh Mainland Fault (KMF) and the South Wagad Fault (SWF) constitute major tectonic entities in the area. Interaction between these two faults is considered as the causative factor for the Bhuj 2001 event (Biswas and Khattri, 2002;Mathew et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Determination of directions of horizontal principal stress and identification of active faults in Kachchh (India) by electromagnetic radiation (EMR)

Mallik

Mathew

Angerer

et al. 2008

Journal of Geodynamics

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Section: Geology and Seismotectonicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of directions of horizontal principal stress and identification of active faults in Kachchh (India) by electromagnetic radiation (EMR)

Mallik

Mathew

Angerer

et al. 2008

Journal of Geodynamics

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“…1b), deposited in a possible Mesozoic rift basin (Biswas 1982) which is currently experiencing tectonic inversion and compression. The Kachchh region is undergoing active folding and thrusting which has produced long, linear structural uplifts (Mathew et al 2006;Karanth and Gadhavi 2007). Kachchh is seismically very active and has had major earthquakes in the past 200 years, including the 1819 Allah Bund earthquake (in present-day southern Pakistan), the 1956 Anjar earthquake in eastern Kachchh, and the 2001 Bhuj earthquake (M w 7.7) that killed tens of thousands of people (Mandal et al 2004).…”

Section: Geology Of the Deccan Traps And Kachchhmentioning

confidence: 99%

Mafic alkalic magmatism in central Kachchh, India: a monogenetic volcanic field in the northwestern Deccan Traps

2010

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Magmatism in Kachchh, in the northwestern Deccan continental flood basalt province, is represented not only by typical tholeiitic flows and dikes, but also plug-like bodies, in Mesozoic sandstone, of alkali basalt, basanite, melanephelinite and nephelinite, containing mantle nodules. They form the base of the local Deccan stratigraphy and their volcanological context was poorly understood. Based on new and published field, petrographic and geochemical data, we identify this suite as an eroded monogenetic volcanic field. The plugs are shallow-level intrusions (necks, sills, dikes, sheets, laccoliths); one of them is known to have fed a lava flow. We have found local peperites reflecting mingling between magmas and soft sediment, and the remains of a pyroclastic vent composed of non-bedded lapilli tuff breccia, injected by mafic alkalic dikes. The lapilli tuff matrix contains basaltic fragments, glass shards, and detrital quartz and microcline, with secondary zeolites, and there are abundant lithic blocks of mafic alkalic rocks. We interpret this deposit as a maar-diatreme, formed due to phreatomagmatic explosions and associated wall rock fragmentation and collapse. This is one of few known hydrovolcanic vents in the Deccan Traps. The central Kachchh monogenetic volcanic field has >30 individual structures exposed over an area of ∼1,800 km 2 and possibly many more if compositionally identical igneous intrusions in northern Kachchh are proven by future dating work to be contemporaneous. The central Kachchh monogenetic volcanic field implies low-degree mantle melting and limited, periodic magma supply. Regional directed extension was absent or at best insignificant during its formation, in contrast to the contemporaneous significant directed extension and vigorous mantle melting under the main area of the Deccan flood basalts. The central Kachchh field demonstrates regional-scale volcanological, compositional, and tectonic variability within flood basalt provinces, and adds the Deccan Traps to the list of such provinces containing monogenetic-and/or hydrovolcanism, namely the Karoo-Ferrar and Emeishan flood basalts, and plateau basalts in Saudi Arabia, Libya, and Patagonia.

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“…Uplifted fluvial terraces, colluvial as well as alluvial fans and younging-up of fluvial terrace along the fault led earlier researchers to suggest that these faults, particularly the KMF and KHF are active (e.g., Sohoni et al 1999;Malik et al 2001a;Mathew et al 2006). These faults have uplifted the Mesozoic as well as Tertiary rocks.…”

Section: Introductionmentioning

confidence: 99%

Active fault traces along Bhuj Fault and Katrol Hill Fault, and trenching survey at Wandhay, Kachchh, Gujarat, India

Morino¹,

Malik

Mishra

et al. 2008

J Earth Syst Sci

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Several new active fault traces were identified along Katrol Hill Fault (KHF). A new fault (named as Bhuj Fault, BF) that extends into the Bhuj Plain was also identified. These fault traces were identified based on satellite photo interpretation and field survey. Trenches were excavated to identify the paleoseismic events, pattern of faulting and the nature of deformation. New active fault traces were recognized about 1 km north of the topographic boundary between the Katrol Hill and the plain area. The fault exposure along the left bank of Khari River with 10 m wide shear zone in the Mesozoic rocks and showing displacement of the overlying Quaternary deposits is indicative of continued tectonic activity along the ancient fault. The E-W trending active fault traces along the KHF in the western part changes to NE-SW or ENE-WSW near Wandhay village.Trenching survey across a low scarp near Wandhay village reveals three major fault strands F1, F2, and F3. These fault strands displaced the older terrace deposits comprising Sand, Silt and Gravel units along with overlying younger deposits from units 1 to 5 made of gravel, sand and silt. Stratigraphic relationship indicates at least three large magnitude earthquakes along KHF during Late Holocene or recent historic past.

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Luminescence chronometry and geomorphic evidence of active fold growth along the Kachchh Mainland Fault (KMF), Kachchh, India: Seismotectonic implications

Cited by 69 publications

References 24 publications

Determination of directions of horizontal principal stress and identification of active faults in Kachchh (India) by electromagnetic radiation (EMR)

Determination of directions of horizontal principal stress and identification of active faults in Kachchh (India) by electromagnetic radiation (EMR)

Mafic alkalic magmatism in central Kachchh, India: a monogenetic volcanic field in the northwestern Deccan Traps

Active fault traces along Bhuj Fault and Katrol Hill Fault, and trenching survey at Wandhay, Kachchh, Gujarat, India

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