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...
Ausführliche Beschreibung
Autor*in: |
Raoof, J [verfasserIn] |
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Format: |
Artikel |
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Sprache: |
Englisch |
Erschienen: |
2017 |
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Rechteinformationen: |
Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: Tectonics - Washington, DC : Union, 1982, 36(2017), 5, Seite 962-980 |
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Übergeordnetes Werk: |
volume:36 ; year:2017 ; number:5 ; pages:962-980 |
Links: |
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DOI / URN: |
10.1002/2016TC004375 |
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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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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 |
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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. 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Raoof, J |
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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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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 |
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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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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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3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region |
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3‐D seismic tomography of the lithosphere and its geodynamic implications beneath the northeast India region |
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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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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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