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Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography

The Gujarat region in western India is known for its intra-plate seismic activity, including the Mw 7.7 Bhuj earthquake, a reverse-faulting event that reactivated normal faults of the Mesozoic Kachchh rift zone. The Late Cretaceous Deccan Traps, one of the largest igneous provinces on the Earth, cov...

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Main Authors: Prajapati, S., Kukarina, E., Mishra, S.
Format: Article
Published: Elsevier B.V. 2016
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959224577&doi=10.1016%2fj.tecto.2016.01.024&partnerID=40&md5=5fdf47a9922202057f65cc3708afba02
http://eprints.utp.edu.my/31014/
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spelling my.utp.eprints.310142022-03-25T07:53:16Z Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography Prajapati, S. Kukarina, E. Mishra, S. The Gujarat region in western India is known for its intra-plate seismic activity, including the Mw 7.7 Bhuj earthquake, a reverse-faulting event that reactivated normal faults of the Mesozoic Kachchh rift zone. The Late Cretaceous Deccan Traps, one of the largest igneous provinces on the Earth, cover the southern part of Gujarat. This study is aimed at bringing light to the crustal rift zone structure and likely origin of the Traps based on the velocity structure of the crust beneath Gujarat. Tomographic inversion of the Gujarat region was done using the non-linear, passive-source tomographic algorithm, LOTOS. We use high-quality arrival times of 22,280 P and 22,040 S waves from 3555 events recorded from August 2006 to May 2011 at 83 permanent and temporary stations installed in Gujarat state by the Institute of Seismological Research (ISR). We conclude that the resulting high-velocity anomalies, which reach down to the Moho, are most likely related to intrusives associated with the Deccan Traps. Low velocity anomalies are found in sediment-filled Mesozoic rift basins and are related to weakened zones of faults and fracturing. A low-velocity anomaly in the north of the region coincides with the seismogenic zone of the reactivated Kachchh rift system, which is apparently associated with the channel of the outpouring of Deccan basalt. © 2016 Elsevier B.V.. Elsevier B.V. 2016 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959224577&doi=10.1016%2fj.tecto.2016.01.024&partnerID=40&md5=5fdf47a9922202057f65cc3708afba02 Prajapati, S. and Kukarina, E. and Mishra, S. (2016) Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography. Tectonophysics, 672-67 . pp. 139-149. http://eprints.utp.edu.my/31014/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description The Gujarat region in western India is known for its intra-plate seismic activity, including the Mw 7.7 Bhuj earthquake, a reverse-faulting event that reactivated normal faults of the Mesozoic Kachchh rift zone. The Late Cretaceous Deccan Traps, one of the largest igneous provinces on the Earth, cover the southern part of Gujarat. This study is aimed at bringing light to the crustal rift zone structure and likely origin of the Traps based on the velocity structure of the crust beneath Gujarat. Tomographic inversion of the Gujarat region was done using the non-linear, passive-source tomographic algorithm, LOTOS. We use high-quality arrival times of 22,280 P and 22,040 S waves from 3555 events recorded from August 2006 to May 2011 at 83 permanent and temporary stations installed in Gujarat state by the Institute of Seismological Research (ISR). We conclude that the resulting high-velocity anomalies, which reach down to the Moho, are most likely related to intrusives associated with the Deccan Traps. Low velocity anomalies are found in sediment-filled Mesozoic rift basins and are related to weakened zones of faults and fracturing. A low-velocity anomaly in the north of the region coincides with the seismogenic zone of the reactivated Kachchh rift system, which is apparently associated with the channel of the outpouring of Deccan basalt. © 2016 Elsevier B.V..
format Article
author Prajapati, S.
Kukarina, E.
Mishra, S.
spellingShingle Prajapati, S.
Kukarina, E.
Mishra, S.
Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography
author_facet Prajapati, S.
Kukarina, E.
Mishra, S.
author_sort Prajapati, S.
title Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography
title_short Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography
title_full Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography
title_fullStr Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography
title_full_unstemmed Crustal seismic structure beneath the Deccan Traps area (Gujarat, India), from local travel-time tomography
title_sort crustal seismic structure beneath the deccan traps area (gujarat, india), from local travel-time tomography
publisher Elsevier B.V.
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959224577&doi=10.1016%2fj.tecto.2016.01.024&partnerID=40&md5=5fdf47a9922202057f65cc3708afba02
http://eprints.utp.edu.my/31014/
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score 13.211869

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