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Deformation mode switches in the Penninic units of the Utier Valley (Western Alps): Evidence for a dynamic orogen

Beltrando, Marco; Lister, Gordon; Hermann, Joerg; Forster, Margaret; Compagnoni, Roberto


Multiple deformation mode switches from shortening to extension have been detected in the Penninic units of the Urtier Valley, to the north of the Gran Paradiso massif. An early shortening phase, whose traces are poorly preserved, led to the tectonic burial of rock units to high pressure conditions. Subsequent extensional shearing (SZgr1) led to the formation of mylonitic fabrics. During this event the eclogitic Piemonte unit was exhumed to greenschist facies conditions (P = 0.2-0.3 GPa) in the...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: Journal of Structural Geology
DOI: 10.1016/j.jsg.2007.10.008


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