View in EDS

Crustal structure across the Three Gorges area of the Yangtze platform, central China, from seismic refraction/wide-angle reflection data

Saved in:
Bibliographic Details
Title: Crustal structure across the Three Gorges area of the Yangtze platform, central China, from seismic refraction/wide-angle reflection data
Authors: Zhang, Zhongjie1 zhangzj@mail.iggcas.ac.cn, Bai, Zhiming1, Mooney, Walter2 mooney@usgs.gov, Wang, Chunyong3, Chen, Xuebo4, Wang, Erchie1, Teng, Jiwen1, Okaya, Nihal2
Source: Tectonophysics. Oct2009, Vol. 475 Issue 3/4, p423-437. 15p.
Subjects: Seismic reflection method data processing, Geological basins, Geologic faults, Rifts (Geology), Igneous intrusions, Geophysics, Crust of the earth, Earth (Planet)
Geographic Terms: Yangtze River Gorges (China), China
Abstract: Abstract: We present active-source seismic data recorded along a 300 km-long profile across the Three Gorges area of the western Yangtze platform, central China. From west to east, the profile crosses the Zigui basin, Huangling dome and Jianghan basin. The derived crustal P-wave velocity structure changes significantly across the Tongchenghe fault that lies at the transition from the Huangling dome to the Jianghan basin. West of the Tongchenghe fault, beneath the Zigui basin and the Huangling dome, we observe a ~42 km thick crust of relatively low average velocity (6.3–6.4 km/s). In contrast, east of the Tongchenghe fault, beneath the Jianghan basin, the crust is only 30 km thick and has a high average velocity (6.6–6.7 km/s). A west–east variation in crustal composition along the Tongchenghe fault is also inferred. West of the fault, P-wave velocities suggest a felsic composition with an intermediate layer at the base of the crust, whilst, east of the fault, felsic, intermediate, and mafic crustal layers are apparent. Our results suggest that the crust beneath the Jianghan basin has been thinned by rifting, accompanied by intrusion of the lower crust by mafic dikes and sills. The west-to-east division of the crust in the Three Gorges area coincides with first-order geophysical contrasts in gravity, topography, crustal and lithospheric thickness. [Copyright &y& Elsevier]
Copyright of Tectonophysics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 44259511
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Crustal structure across the Three Gorges area of the Yangtze platform, central China, from seismic refraction/wide-angle reflection data
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Zhongjie%22">Zhang, Zhongjie</searchLink><relatesTo>1</relatesTo><i> zhangzj@mail.iggcas.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Bai%2C+Zhiming%22">Bai, Zhiming</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mooney%2C+Walter%22">Mooney, Walter</searchLink><relatesTo>2</relatesTo><i> mooney@usgs.gov</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Chunyong%22">Wang, Chunyong</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Xuebo%22">Chen, Xuebo</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Erchie%22">Wang, Erchie</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Teng%2C+Jiwen%22">Teng, Jiwen</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Okaya%2C+Nihal%22">Okaya, Nihal</searchLink><relatesTo>2</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Tectonophysics%22">Tectonophysics</searchLink>. Oct2009, Vol. 475 Issue 3/4, p423-437. 15p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Seismic+reflection+method+data+processing%22">Seismic reflection method data processing</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+basins%22">Geological basins</searchLink><br /><searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink><br /><searchLink fieldCode="DE" term="%22Rifts+%28Geology%29%22">Rifts (Geology)</searchLink><br /><searchLink fieldCode="DE" term="%22Igneous+intrusions%22">Igneous intrusions</searchLink><br /><searchLink fieldCode="DE" term="%22Geophysics%22">Geophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Crust+of+the+earth%22">Crust of the earth</searchLink><br /><searchLink fieldCode="DE" term="%22Earth+%28Planet%29%22">Earth (Planet)</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Yangtze+River+Gorges+%28China%29%22">Yangtze River Gorges (China)</searchLink><br /><searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: We present active-source seismic data recorded along a 300 km-long profile across the Three Gorges area of the western Yangtze platform, central China. From west to east, the profile crosses the Zigui basin, Huangling dome and Jianghan basin. The derived crustal P-wave velocity structure changes significantly across the Tongchenghe fault that lies at the transition from the Huangling dome to the Jianghan basin. West of the Tongchenghe fault, beneath the Zigui basin and the Huangling dome, we observe a ~42 km thick crust of relatively low average velocity (6.3–6.4 km/s). In contrast, east of the Tongchenghe fault, beneath the Jianghan basin, the crust is only 30 km thick and has a high average velocity (6.6–6.7 km/s). A west–east variation in crustal composition along the Tongchenghe fault is also inferred. West of the fault, P-wave velocities suggest a felsic composition with an intermediate layer at the base of the crust, whilst, east of the fault, felsic, intermediate, and mafic crustal layers are apparent. Our results suggest that the crust beneath the Jianghan basin has been thinned by rifting, accompanied by intrusion of the lower crust by mafic dikes and sills. The west-to-east division of the crust in the Three Gorges area coincides with first-order geophysical contrasts in gravity, topography, crustal and lithospheric thickness. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Tectonophysics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=44259511
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.tecto.2009.05.022
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 423
    Subjects:
      – SubjectFull: Seismic reflection method data processing
        Type: general
      – SubjectFull: Geological basins
        Type: general
      – SubjectFull: Geologic faults
        Type: general
      – SubjectFull: Rifts (Geology)
        Type: general
      – SubjectFull: Igneous intrusions
        Type: general
      – SubjectFull: Geophysics
        Type: general
      – SubjectFull: Crust of the earth
        Type: general
      – SubjectFull: Earth (Planet)
        Type: general
      – SubjectFull: Yangtze River Gorges (China)
        Type: general
      – SubjectFull: China
        Type: general
    Titles:
      – TitleFull: Crustal structure across the Three Gorges area of the Yangtze platform, central China, from seismic refraction/wide-angle reflection data
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Zhang, Zhongjie
      – PersonEntity:
          Name:
            NameFull: Bai, Zhiming
      – PersonEntity:
          Name:
            NameFull: Mooney, Walter
      – PersonEntity:
          Name:
            NameFull: Wang, Chunyong
      – PersonEntity:
          Name:
            NameFull: Chen, Xuebo
      – PersonEntity:
          Name:
            NameFull: Wang, Erchie
      – PersonEntity:
          Name:
            NameFull: Teng, Jiwen
      – PersonEntity:
          Name:
            NameFull: Okaya, Nihal
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 10
              Text: Oct2009
              Type: published
              Y: 2009
          Identifiers:
            – Type: issn-print
              Value: 00401951
          Numbering:
            – Type: volume
              Value: 475
            – Type: issue
              Value: 3/4
          Titles:
            – TitleFull: Tectonophysics
              Type: main
ResultId 1