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The carbonate tectonic units of northern Calabria (Italy); a record of Apulian palaeomargin evolution and Miocene convergence, continental crust subduction, and exhumation of HP-LT rocks

A. Iannace, S. Vitale, M. D'Errico, Stefano Mazzoli, A. Di Staso, E. Macaione, A. Messina, S. M. Reddy, R. Somma, V. Zamparelli, M. Zattin and G. Bonardi
The carbonate tectonic units of northern Calabria (Italy); a record of Apulian palaeomargin evolution and Miocene convergence, continental crust subduction, and exhumation of HP-LT rocks
Journal of the Geological Society of London (December 2007) 164 (6): 1165-1186

Abstract

In northern Calabria (Italy), the metasedimentary succession of the Lungro-Verbicaro tectonic unit preserves mineral assemblages suggesting underthrusting to depths in excess of 40 km. Internal deformation of these rocks occurred continuously during the following decompression. Index mineral composition associated with progressively younger tectonic fabrics indicates that a substantial part of the structural evolution took place within the blueschist-facies P-T field. Despite their tectonic and metamorphic history, the rocks of the Lungro-Verbicaro Unit preserve significant sedimentary and palaeontological features allowing correlations with successions included in adjacent thrust sheets and the reconstruction of the Mesozoic continental margin architecture. The subduction-exhumation cycle recorded by the Lungro-Verbicaro Unit is entirely of Miocene age. This portion of the Apulia continental palaeomargin was involved in convergence-related deformation not earlier than the Aquitanian. The integration of our results with available constraints on the tectonic evolution of the Apennine-Calabrian Arc system suggests that subduction and most of the subsequent exhumation of the Lungro-Verbicaro Unit occurred, up to Langhian time, at maximum vertical rates in excess of 15 mm a (super -1) . The exhumation process was then completed, at much slower rates (<2 mm a (super -1) ) in Late Miocene time, as indicated by both apatite fission-track data and stratigraphic information.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 164
Serial Issue: 6
Title: The carbonate tectonic units of northern Calabria (Italy); a record of Apulian palaeomargin evolution and Miocene convergence, continental crust subduction, and exhumation of HP-LT rocks
Affiliation: Universita di Napoli Federico II, Dipartimento di Scienze della Terra, Naples, Italy
Pages: 1165-1186
Published: 200712
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 71
Accession Number: 2007-120643
Categories: Structural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sect., geol. sketch maps
N39°30'00" - N40°00'00", E15°49'60" - E16°19'60"
Secondary Affiliation: Curtin University of Technology, AUS, AustraliaUniversita di Messina, ITA, ItalyUniversita di Bologna, ITA, Italy
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200749
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