Lyell Collection
Geological Society, London, Special Publications
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Rossetti, F.
Right arrow Articles by Salvini, F.
Right arrow Search for Related Content
Geological Society, London, Special Publications; 2000; v. 174; p. 55-77;
DOI: 10.1144/GSL.SP.1999.174.01.04
© 2000 Geological Society of London

Igneous Intrusions

Pluton emplacement in the Northern Tyrrhenian area, Italy

F. Rossetti1, C. Faccenna1, V. Acocella2, R. Funiciello1, L. Jolivet3 & F. Salvini1

1 Dipartimento di Scienze Geologiche, Università ‘Roma Tre’, Largo S.L. Murialdo, 1, 00146 Rome, Italy rossetti{at}uniroma3.it
2 Dipartimento di Scienze della Terra, Università di Siena, Via del Laterino 8, 53100 Siena, Italy
3 Département de Géotéctonique, Université Pierre et Marie Curie, 4 Place Jussieu, 75252, Paris cedex 05, France

The post-orogenic extensional processes that affected the inner sector of the Northern Apennine orogenic wedge (i.e. the Northern Tyrrhenian region) were accompanied by the emplacement of chiefly anatectic intrusive rocks of Late Miocene to Mid-Pleistocene age. In this paper, we compare geological and structural data from Messinian-Pliocene monzogranitic intrusions located both offshore (Monte Capanne, Porto Azzurro, Montecristo and Giglio) and onshore (Gavorrano and Botro ai Marmi) in the Northern Tyrrhenian region to constrain modes of pluton emplacement. Offshore, eastward non-coaxial extensional shear zones active both in ductile and brittle conditions accompanied the emplacement of the monzogranitic intrusions, and accommodated extension oriented E-W to WNW-ESE. Onshore, N-S dextral strike-slip faulting was active both during and after the late stage of emplacement of both Botro ai Marmi and Gavorrano plutons, and controlled their rise in coincidence with releasing bends. In our interpretation, the N-S, Late Miocene-Pliocene strike-slip faulting constitutes a secondary shear feature in a context of generalized post-orogenic extension, accommodating in the brittle upper crust the non-coaxial ductile extension in the lower crust. In this framework, N-S strike-slip faults localized the rise of early anatectic magma, generated during regional post-orogenic extension and residing at the base of the extending crust.





This article has been cited by other articles:


Home page
 Geological Society, London, Special PublicationsHome page
F. Mazzarini, G. Corti, G. Musumeci, and F. Innocenti
Tectonic control on laccolith emplacement in the northern Apennines fold-thrust belt: the Gavorrano intrusion (southern Tuscany, Italy)
Geological Society, London, Special Publications, 2004; 234: 151 - 161.
[Abstract] [PDF]