Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Vignaroli, G.*
Faccenna, C.*
Jolivet, L.*
Piromallo, C.*
Rossetti, F.*
Title: Subduction polarity reversal at the junction between the Western Alps and the Northern Apennines, Italy
Title of journal: Tectonophysics
Series/Report no.: 1-4 /450 (2008)
Publisher: Elsevier
Issue Date: 28-Dec-2007
DOI: 10.1016/j.tecto.2007.12.012
Keywords: Western Alps
Northern Apennines
Voltri Massif
Kinematic reconstruction
Extensional detachment
Toroidal flow
Abstract: The controversial relationship between the orogenic segments of the Western Alps and the Northern Apennines is here explored integrating recently published 3D tomographic models of subduction with new and re-interpreted geological observations from the eclogitic domain of the Voltri Massif (Ligurian Alps, Italy), where the two belts joint each other. The Voltri Massif is here described as an extensional domain accommodating the opposing outward migration of the Alpine and Apennine thrust fronts, since about 30–35 Ma. Using tomographic images of the upper mantle and paleotectonic reconstructions, we propose that this extensional setting represents the surface manifestation of an along strike change in polarity of the subducted oceanic slab whose polarity changed laterally in space and in time. Our tectonic model suggests that the westward shift of the Alpine thrust front from the Oligocene onward was the consequence of the toroidal asthenospheric flow induced by the retreat of the Apenninic slab.
Appears in Collections:04.07.02. Geodynamics
Papers Published / Papers in press

Files in This Item:

File Description SizeFormatVisibility
Vignaroli_etal_TECTONOPHYSICS_2008.pdfMain article4.45 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA