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Publication Detail
Neogene exhumation history of the Bergell massif (southeast Central Alps)
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Mahéo G, Gautheron C, Leloup PH, Fox M, Tassant-Got L, Douville E
  • Publication date:
    01/04/2013
  • Pagination:
    110, 118
  • Journal:
    Terra Nova
  • Volume:
    25
  • Issue:
    2
  • Status:
    Published
  • Print ISSN:
    0954-4879
Abstract
The Bergell pluton is an elongated plutonic body emplaced during Oligocene time along the Insubric line in the central Alps. Reconstruction of its exhumation, based on apatite (U-Th)/He dating and one-dimensional thermal modelling, provides evidence for a three steps history: (i) following initial fast exhumation from >20-25 to ∼17Ma, slow down of the exhumation rate until ∼10Ma, (ii) quiescent phase from ∼10 to ∼5-6Ma and (iii) an apparent increase of exhumation after ∼5-6Ma. The decrease in exhumation rate is related with migration of thrusting south of the Bergell area in the Southern Alps (Lombardic phase). Increase in exhumation rate after ∼5-6Ma is possibly related with Messinian base level drop, enhanced climatic variability (3-4Ma) and intensification of glaciation (∼0.87Ma). © 2012 Blackwell Publishing Ltd.
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