Evidence for a wide and gently dipping Main Himalayan Thrust in western Bhutan

DOI Web Site Web Site 被引用文献1件
  • Romain Le Roux‐Mallouf
    Géosciences Montpellier, CNRS, UMR5243 Université de Montpellier Montpellier France
  • Vincent Godard
    Aix‐Marseille Université, CNRS, IRD Aix‐en‐Provence France
  • Rodolphe Cattin
    Géosciences Montpellier, CNRS, UMR5243 Université de Montpellier Montpellier France
  • Matthieu Ferry
    Géosciences Montpellier, CNRS, UMR5243 Université de Montpellier Montpellier France
  • Jampel Gyeltshen
    Seismology and Geophysics Division Department of Geology and Mines Thimphu Bhutan
  • Jean‐François Ritz
    Géosciences Montpellier, CNRS, UMR5243 Université de Montpellier Montpellier France
  • Dowchu Drupka
    Seismology and Geophysics Division Department of Geology and Mines Thimphu Bhutan
  • Valéry Guillou
    Aix‐Marseille Université, CNRS, IRD Aix‐en‐Provence France
  • M. Arnold
    Aix‐Marseille Université, CNRS, IRD Aix‐en‐Provence France
  • G. Aumaître
    Aix‐Marseille Université, CNRS, IRD Aix‐en‐Provence France
  • D. L. Bourlès
    Aix‐Marseille Université, CNRS, IRD Aix‐en‐Provence France
  • K. Keddadouche
    Aix‐Marseille Université, CNRS, IRD Aix‐en‐Provence France

書誌事項

公開日
2015-05-07
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/2015gl063767
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The Main Himalayan Thrust (MHT) is the source of great earthquakes that have been documented along the range. Its geometry is a key parameter that influences accommodation of tectonic loading and earthquake magnitudes along the Himalayan Arc. Although seismic images are available for both the western and the central part of the range, this geometry remains poorly constrained for the Bhutanese Himalayas. Here we address this issue using a <jats:sup>10</jats:sup>Be cosmogenic nuclides denudation transect across western Bhutan. We observe a wide low denudation rate domain between 50 km and 110 km from the front followed by a strong northward increase. Using a joint inversion of denudation rates, GPS data, and Holocene uplift rates, we interpret this pattern as a consequence of a flat‐ramp transition along the MHT. Compared to central Nepal and Sikkim, this location of the ramp suggests a wider décollement, with implications for greater seismogenic potential of the MHT in western Bhutan.</jats:p>

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