Exhumation history of eastern Ladakh revealed by 40Ar/39Ar and fission-track ages: the Indus River-Tso Morari transect, NW Himalaya

Détails

ID Serval
serval:BIB_3B71DE845C3D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Exhumation history of eastern Ladakh revealed by 40Ar/39Ar and fission-track ages: the Indus River-Tso Morari transect, NW Himalaya
Périodique
Journal of the Geological Society
Auteur(s)
Schlup M., Carter A., Cosca M.A, Steck A.
ISSN-L
0016-7649
Statut éditorial
Publié
Date de publication
2003
Peer-reviewed
Oui
Volume
160
Pages
385-399
Langue
anglais
Résumé
Fission-track and (40)Ar/(39)Ar ages place time constraints on the
exhumation of the North Himalayan nappe stack, the Indus Suture Zone and
Molasse, and the Transhimalayan Batholith in eastern Ladakh (NW India).
Results from this and previous studies on a north-south transect passing
near Tso Morari Lake suggest that the SW-directed North Himalayan nappe
stack (comprising the Mata, Tetraogal and Tso Morari nappes) was
emplaced and metamorphosed by c. 50-45 Ma, and exhumed to moderately
shallow depths (c. 10 km) by c. 45-40 Ma. From the mid-Eocene to the
present, exhumation continued at a steady and slow rate except for the
root zone of the Tso Morari nappe, which cooled faster than the rest of
the nappe stack. Rapid cooling occurred at c. 20 Ma and is linked to
brittle deformation along the normal Ribil-Zildat Fault concomitant with
extrusion of the Crystalline nappe in the south. Data from the Indus
Molasse suggest that sediments were still being deposited during the
Miocene.
Création de la notice
07/12/2012 15:56
Dernière modification de la notice
20/08/2019 13:31
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