Post-collisional tectonics in the Northern Cottian Alps (Italian Western Alps)

Field mapping and structural analysis have allowed us to characterise the fault geometry and the post-metamorphic tectonics of an area located in the Northern Cottian Alps (inner Western Alps). Two main faulting stages were distinguished here. The first (Oligocene?-Early Miocene) is related to the d...

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Bibliographic Details
Published inInternational journal of earth sciences : Geologische Rundschau Vol. 100; no. 6; pp. 1349 - 1373
Main Authors Perrone, G., Cadoppi, P., Tallone, S., Balestro, G.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer-Verlag 01.09.2011
Springer Nature B.V
Subjects
Deformation
Earth and Environmental Science
Earth Sciences
Geochemistry
Geology
Geophysics/Geodesy
Mineral Resources
Miocene
Mountains
Oligocene
Original Paper
Plate tectonics
Sedimentology
Structural analysis
Structural Geology
Tectonics
Alps
Italy, Alps Mts
Faults
Western Alps
Cottian Alps
Structural geology
Post-collisional tectonics
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Summary:Field mapping and structural analysis have allowed us to characterise the fault geometry and the post-metamorphic tectonics of an area located in the Northern Cottian Alps (inner Western Alps). Two main faulting stages were distinguished here. The first (Oligocene?-Early Miocene) is related to the development of an E–W-striking left-normal shear zone. This shear zone is interpreted as an antithetical of two regional, N–S right-lateral structures: the Col del Lis-Trana Deformation Zone (LTZ) and the Colle delle Finestre Deformation Zone (CFZ). The second faulting stage (post-Early Miocene) is related mainly to the development of N–S normal faults, coeval with the extensional reactivation of the LTZ and the CFZ. We discuss this kinematic evolution in the framework of the geodynamic evolution of the Western Alps.
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ISSN:1437-3254
1437-3262
DOI:10.1007/s00531-010-0534-1