3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region

We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Raoof, J [verfasserIn] Mukhopadhyay, S Koulakov, I Kayal, J. R

Format:	Artikel
Sprache:	Englisch

Erschienen:	2017

Rechteinformationen:	Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved.

Schlagwörter:	tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills

Übergeordnetes Werk:	Enthalten in: Tectonics - Washington, DC : Union, 1982, 36(2017), 5, Seite 962-980
Übergeordnetes Werk:	volume:36 ; year:2017 ; number:5 ; pages:962-980

Links:	Volltext Link aufrufen Link aufrufen

DOI / URN:	10.1002/2016TC004375

Katalog-ID:	OLC1994845449

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520			\|a We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle
540			\|a Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved.
650		4	\|a tomography
650		4	\|a geodynamics
650		4	\|a tectonics
650		4	\|a northeast India
650		4	\|a seismicity
650		4	\|a Oceanic crust
650		4	\|a Sinking
650		4	\|a Lithosphere
650		4	\|a Roots
650		4	\|a Velocity
650		4	\|a Structures
650		4	\|a Identification
650		4	\|a Tectonophysics
650		4	\|a Depth
650		4	\|a Sediments
650		4	\|a Seismic velocities
650		4	\|a Plateaux
650		4	\|a Seismic activity
650		4	\|a Tomography
650		4	\|a Seismic tomography
650		4	\|a Deformation
650		4	\|a Hills
700	1		\|a Mukhopadhyay, S \|4 oth
700	1		\|a Koulakov, I \|4 oth
700	1		\|a Kayal, J. R \|4 oth
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856	4	1	\|u http://dx.doi.org/10.1002/2016TC004375 \|3 Volltext
856	4	2	\|u http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract
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matchkey_str	article:02787407:2017----::desitmgahoteihshradtgoyaiipiainbna
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publishDate	2017
allfields	10.1002/2016TC004375 doi PQ20170901 (DE-627)OLC1994845449 (DE-599)GBVOLC1994845449 (PRQ)p1378-dfe6878461b3ed9266e69b293b387c002493dc38ce013c54bc641ea5c320ba040 (KEY)01128876201700000360005009623dseismictomographyofthelithosphereanditsgeodynami DE-627 ger DE-627 rakwb eng 550 DNB Raoof, J verfasserin aut 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills Mukhopadhyay, S oth Koulakov, I oth Kayal, J. R oth Enthalten in Tectonics Washington, DC : Union, 1982 36(2017), 5, Seite 962-980 (DE-627)130545341 (DE-600)780264-X (DE-576)016105346 0278-7407 nnns volume:36 year:2017 number:5 pages:962-980 http://dx.doi.org/10.1002/2016TC004375 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract https://search.proquest.com/docview/1909946266 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_2014 GBV_ILN_2027 AR 36 2017 5 962-980
spelling	10.1002/2016TC004375 doi PQ20170901 (DE-627)OLC1994845449 (DE-599)GBVOLC1994845449 (PRQ)p1378-dfe6878461b3ed9266e69b293b387c002493dc38ce013c54bc641ea5c320ba040 (KEY)01128876201700000360005009623dseismictomographyofthelithosphereanditsgeodynami DE-627 ger DE-627 rakwb eng 550 DNB Raoof, J verfasserin aut 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills Mukhopadhyay, S oth Koulakov, I oth Kayal, J. R oth Enthalten in Tectonics Washington, DC : Union, 1982 36(2017), 5, Seite 962-980 (DE-627)130545341 (DE-600)780264-X (DE-576)016105346 0278-7407 nnns volume:36 year:2017 number:5 pages:962-980 http://dx.doi.org/10.1002/2016TC004375 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract https://search.proquest.com/docview/1909946266 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_2014 GBV_ILN_2027 AR 36 2017 5 962-980
allfields_unstemmed	10.1002/2016TC004375 doi PQ20170901 (DE-627)OLC1994845449 (DE-599)GBVOLC1994845449 (PRQ)p1378-dfe6878461b3ed9266e69b293b387c002493dc38ce013c54bc641ea5c320ba040 (KEY)01128876201700000360005009623dseismictomographyofthelithosphereanditsgeodynami DE-627 ger DE-627 rakwb eng 550 DNB Raoof, J verfasserin aut 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills Mukhopadhyay, S oth Koulakov, I oth Kayal, J. R oth Enthalten in Tectonics Washington, DC : Union, 1982 36(2017), 5, Seite 962-980 (DE-627)130545341 (DE-600)780264-X (DE-576)016105346 0278-7407 nnns volume:36 year:2017 number:5 pages:962-980 http://dx.doi.org/10.1002/2016TC004375 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract https://search.proquest.com/docview/1909946266 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_2014 GBV_ILN_2027 AR 36 2017 5 962-980
allfieldsGer	10.1002/2016TC004375 doi PQ20170901 (DE-627)OLC1994845449 (DE-599)GBVOLC1994845449 (PRQ)p1378-dfe6878461b3ed9266e69b293b387c002493dc38ce013c54bc641ea5c320ba040 (KEY)01128876201700000360005009623dseismictomographyofthelithosphereanditsgeodynami DE-627 ger DE-627 rakwb eng 550 DNB Raoof, J verfasserin aut 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills Mukhopadhyay, S oth Koulakov, I oth Kayal, J. R oth Enthalten in Tectonics Washington, DC : Union, 1982 36(2017), 5, Seite 962-980 (DE-627)130545341 (DE-600)780264-X (DE-576)016105346 0278-7407 nnns volume:36 year:2017 number:5 pages:962-980 http://dx.doi.org/10.1002/2016TC004375 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract https://search.proquest.com/docview/1909946266 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_2014 GBV_ILN_2027 AR 36 2017 5 962-980
allfieldsSound	10.1002/2016TC004375 doi PQ20170901 (DE-627)OLC1994845449 (DE-599)GBVOLC1994845449 (PRQ)p1378-dfe6878461b3ed9266e69b293b387c002493dc38ce013c54bc641ea5c320ba040 (KEY)01128876201700000360005009623dseismictomographyofthelithosphereanditsgeodynami DE-627 ger DE-627 rakwb eng 550 DNB Raoof, J verfasserin aut 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills Mukhopadhyay, S oth Koulakov, I oth Kayal, J. R oth Enthalten in Tectonics Washington, DC : Union, 1982 36(2017), 5, Seite 962-980 (DE-627)130545341 (DE-600)780264-X (DE-576)016105346 0278-7407 nnns volume:36 year:2017 number:5 pages:962-980 http://dx.doi.org/10.1002/2016TC004375 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract https://search.proquest.com/docview/1909946266 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_2014 GBV_ILN_2027 AR 36 2017 5 962-980
language	English
source	Enthalten in Tectonics 36(2017), 5, Seite 962-980 volume:36 year:2017 number:5 pages:962-980
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topic_facet	tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills
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author	Raoof, J
spellingShingle	Raoof, J ddc 550 misc tomography misc geodynamics misc tectonics misc northeast India misc seismicity misc Oceanic crust misc Sinking misc Lithosphere misc Roots misc Velocity misc Structures misc Identification misc Tectonophysics misc Depth misc Sediments misc Seismic velocities misc Plateaux misc Seismic activity misc Tomography misc Seismic tomography misc Deformation misc Hills 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region
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topic_title	550 DNB 3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region tomography geodynamics tectonics northeast India seismicity Oceanic crust Sinking Lithosphere Roots Velocity Structures Identification Tectonophysics Depth Sediments Seismic velocities Plateaux Seismic activity Tomography Seismic tomography Deformation Hills
topic	ddc 550 misc tomography misc geodynamics misc tectonics misc northeast India misc seismicity misc Oceanic crust misc Sinking misc Lithosphere misc Roots misc Velocity misc Structures misc Identification misc Tectonophysics misc Depth misc Sediments misc Seismic velocities misc Plateaux misc Seismic activity misc Tomography misc Seismic tomography misc Deformation misc Hills
topic_unstemmed	ddc 550 misc tomography misc geodynamics misc tectonics misc northeast India misc seismicity misc Oceanic crust misc Sinking misc Lithosphere misc Roots misc Velocity misc Structures misc Identification misc Tectonophysics misc Depth misc Sediments misc Seismic velocities misc Plateaux misc Seismic activity misc Tomography misc Seismic tomography misc Deformation misc Hills
topic_browse	ddc 550 misc tomography misc geodynamics misc tectonics misc northeast India misc seismicity misc Oceanic crust misc Sinking misc Lithosphere misc Roots misc Velocity misc Structures misc Identification misc Tectonophysics misc Depth misc Sediments misc Seismic velocities misc Plateaux misc Seismic activity misc Tomography misc Seismic tomography misc Deformation misc Hills
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title	3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region
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title_full	3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region
author_sort	Raoof, J
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title_sort	3‐d seismic tomography of the lithosphere and its geodynamic implications beneath the northeast india region
title_auth	3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region
abstract	We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle
abstractGer	We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle
abstract_unstemmed	We have evolved 3‐D seismic velocity structures in northeast India region and its adjoining areas to understand the geodynamic processes of Indian lithosphere that gently underthrusts under the Himalayas and steeply subducts below the Indo‐Burma Ranges. The region is tectonically buttressed between the Himalayan arc to the north and the Indo‐Burmese arc to the east. The tomographic image shows heterogeneous structure of lithosphere depicting different tectonic blocks. Though our results are limited to shallower depth (0–90 km), it matches well with the deeper continuation of lithospheric structure obtained in an earlier study. We observe low‐velocity structure all along the Eastern Himalayas down to ~70 km depth, which may be attributed to deeper roots/thicker crust developed by underthrusting of Indian plate. Parallel to this low‐velocity zone lies a high‐velocity zone in foredeep region, represents the Indian lithosphere. The underthrusting Indian lithosphere under the Himalayas as well as below the Indo‐Burma Ranges is well reflected as a high‐velocity dipping structure. The buckled up part of bending Indian plate in study region, the Shillong Plateau‐Mikir Hills tectonic block, is marked as a high‐velocity structure at shallower depth. The Eastern Himalayan Syntaxis, tectonic block where the two arcs meet, is identified as a high‐velocity structure. The Bengal Basin, tectonic block to the south of Shillong Plateau, shows low velocity due to its thicker sediments. Based on the tomographic image, a schematic model is presented to elucidate the structure and geodynamics of Indian lithosphere in study region. The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle
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title_short	3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region
url	http://dx.doi.org/10.1002/2016TC004375 http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract https://search.proquest.com/docview/1909946266
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author2	Mukhopadhyay, S Koulakov, I Kayal, J. R
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up_date	2024-07-03T19:27:56.646Z
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The Indian lithosphere is imaged as a high‐velocity body that gently underthrusts below the Himalayas and subducts below the Indo-Burma Ranges down to ~600 km depth Below the Northeast India region, the Indian lithosphere is buckled up, leading to high seismic activity Below the Indo‐Burma Ranges, downgoing part of the Indian slab is detached from the buckled up part and it is sinking at a steep angle</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2017. American Geophysical Union. 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R</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Tectonics</subfield><subfield code="d">Washington, DC : Union, 1982</subfield><subfield code="g">36(2017), 5, Seite 962-980</subfield><subfield code="w">(DE-627)130545341</subfield><subfield code="w">(DE-600)780264-X</subfield><subfield code="w">(DE-576)016105346</subfield><subfield code="x">0278-7407</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:36</subfield><subfield code="g">year:2017</subfield><subfield code="g">number:5</subfield><subfield code="g">pages:962-980</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1002/2016TC004375</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://onlinelibrary.wiley.com/doi/10.1002/2016TC004375/abstract</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">https://search.proquest.com/docview/1909946266</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2027</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">36</subfield><subfield code="j">2017</subfield><subfield code="e">5</subfield><subfield code="h">962-980</subfield></datafield></record></collection>
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3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region

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