Is there any detachment in the Lower Dolpo (western Nepal)?Y a-t-il un détachement dans le bas Dolpo (Népal occidental) ? |
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Authors: | Rodolfo Carosi Chiara Montomoli Dario Visonà |
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Affiliation: | 1. Dipartimento di Scienze della Terra via S. Maria, University of Pisa, 53, 56126 Pisa, Italy;2. Dipartimento di Mineralogia e Petrologia, University of Padova, c.so Garibaldi 37 35122 Padova, Italy |
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Abstract: | A structural transect in the Lower Dolpo highlights that the deformation and metamorphism of the Tibetan Zone (TZ) increase toward the bottom of the sequence. The contact with the underlying HHC is marked by a metamorphic jump from amphibolite facies in the carbonatic rocks of the upper part of the HHC to greenschist facies marbles in the TZ. Moreover, the HHC and the TZ show different metamorphic histories. The contact zone shows a strain increase accompanied by asymmetric folds with a top-to-the-northeast vergence, connected to a down-to-the-northeast tectonic transport. The contact is interpreted as an extensional shear zone, connected to the South Tibetan Detachment System. To cite this article: R. Carosi et al., C. R. Geoscience 334 (2002) 933–940. |
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Keywords: | Himalayas Lower Dolpo extensional tectonics asymmetric folds Himalaya bas Dolpo tectonique extensive plis asymétriques Tectonique Tectonics |
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