Tectonics of the Dalrymple Trough and uplift of the Murray Ridge (NW Indian Ocean).

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Title: Tectonics of the Dalrymple Trough and uplift of the Murray Ridge (NW Indian Ocean).
Authors: Rodriguez, Mathieu1 rodriguez@geologie.ens.fr, Chamot-Rooke, Nicolas1, Huchon, Philippe2,3, Fournier, Marc2,3, Lallemant, Siegfried4, Delescluse, Matthias1, Zaragosi, Sébastien5, Mouchot, Nicolas6
Source: Tectonophysics. Dec2014, Vol. 636, p1-17. 17p.
Subjects: Watering troughs, Structural geology, Multibeam mapping, Abyssal plain
Geographic Terms: Indian Ocean
Abstract: The Dalrymple Trough is a 150-km-long, 30-km-wide basin located at the northern termination of the Owen Fracture Zone (OFZ), which is the present-day active India–Arabia plate boundary. The Dalrymple Trough is closely associated with the Murray Ridge, a complex of prominent bathymetric highs located on its eastern flank. Recent multibeam mapping of the connection between the Dalrymple Trough and the OFZ revealed a horsetail structure, which suggests a close relationship between geological histories of both structures. However, the 3–6 Ma age of initiation of the OFZ contrasts with the commonly accepted Early Miocene emplacement of the Dalrymple Trough. Recent seismic lines document a new tectonic history of the Dalrymple Trough, involving two major episodes of deformation along the India–Arabia plate boundary at ~ 8–10 Ma and ~ 1.9 ± 0.9 Ma. The 8–10 Ma episode is marked by a system of folds linked to the main uplift of the southern Murray Ridge and the first uplift of the northern Murray Ridge. This episode is related to a global plate reorganization event in the Late Miocene, well expressed by intraplate deformation in the Central Indian Ocean. The Dalrymple Trough opened at ~ 1.9 ± 0.9 Ma subsequently to the formation of a stepover at the India–Arabia plate boundary, coeval with the regional M-unconformity in the Oman abyssal plain, which marks a structural reorganization of the Makran accretionary wedge, and the last uplift of the northern Murray Ridge. [ABSTRACT FROM AUTHOR]
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.)
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  Data: Tectonics of the Dalrymple Trough and uplift of the Murray Ridge (NW Indian Ocean).
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  Data: <searchLink fieldCode="AR" term="%22Rodriguez%2C+Mathieu%22">Rodriguez, Mathieu</searchLink><relatesTo>1</relatesTo><i> rodriguez@geologie.ens.fr</i><br /><searchLink fieldCode="AR" term="%22Chamot-Rooke%2C+Nicolas%22">Chamot-Rooke, Nicolas</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Huchon%2C+Philippe%22">Huchon, Philippe</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Fournier%2C+Marc%22">Fournier, Marc</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lallemant%2C+Siegfried%22">Lallemant, Siegfried</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Delescluse%2C+Matthias%22">Delescluse, Matthias</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zaragosi%2C+Sébastien%22">Zaragosi, Sébastien</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Mouchot%2C+Nicolas%22">Mouchot, Nicolas</searchLink><relatesTo>6</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Tectonophysics%22">Tectonophysics</searchLink>. Dec2014, Vol. 636, p1-17. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Watering+troughs%22">Watering troughs</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+geology%22">Structural geology</searchLink><br /><searchLink fieldCode="DE" term="%22Multibeam+mapping%22">Multibeam mapping</searchLink><br /><searchLink fieldCode="DE" term="%22Abyssal+plain%22">Abyssal plain</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Indian+Ocean%22">Indian Ocean</searchLink>
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  Label: Abstract
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  Data: The Dalrymple Trough is a 150-km-long, 30-km-wide basin located at the northern termination of the Owen Fracture Zone (OFZ), which is the present-day active India–Arabia plate boundary. The Dalrymple Trough is closely associated with the Murray Ridge, a complex of prominent bathymetric highs located on its eastern flank. Recent multibeam mapping of the connection between the Dalrymple Trough and the OFZ revealed a horsetail structure, which suggests a close relationship between geological histories of both structures. However, the 3–6 Ma age of initiation of the OFZ contrasts with the commonly accepted Early Miocene emplacement of the Dalrymple Trough. Recent seismic lines document a new tectonic history of the Dalrymple Trough, involving two major episodes of deformation along the India–Arabia plate boundary at ~ 8–10 Ma and ~ 1.9 ± 0.9 Ma. The 8–10 Ma episode is marked by a system of folds linked to the main uplift of the southern Murray Ridge and the first uplift of the northern Murray Ridge. This episode is related to a global plate reorganization event in the Late Miocene, well expressed by intraplate deformation in the Central Indian Ocean. The Dalrymple Trough opened at ~ 1.9 ± 0.9 Ma subsequently to the formation of a stepover at the India–Arabia plate boundary, coeval with the regional M-unconformity in the Oman abyssal plain, which marks a structural reorganization of the Makran accretionary wedge, and the last uplift of the northern Murray Ridge. [ABSTRACT FROM AUTHOR]
– 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.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.tecto.2014.08.001
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      – Code: eng
        Text: English
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        PageCount: 17
        StartPage: 1
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      – SubjectFull: Watering troughs
        Type: general
      – SubjectFull: Structural geology
        Type: general
      – SubjectFull: Multibeam mapping
        Type: general
      – SubjectFull: Abyssal plain
        Type: general
      – SubjectFull: Indian Ocean
        Type: general
    Titles:
      – TitleFull: Tectonics of the Dalrymple Trough and uplift of the Murray Ridge (NW Indian Ocean).
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            NameFull: Rodriguez, Mathieu
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            NameFull: Chamot-Rooke, Nicolas
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            – D: 01
              M: 12
              Text: Dec2014
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              Y: 2014
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