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The Rossano-San Nicola fault zone evolution impacts the burial and maturation histories of the Crotone Basin, Calabrian Arc, Italy

Giacomo Mangano, Tiago M. Alves, Massimo Zecchin, Dario Civile and Salvatore Critelli
The Rossano-San Nicola fault zone evolution impacts the burial and maturation histories of the Crotone Basin, Calabrian Arc, Italy
Petroleum Geoscience (April 2023) 29 (2)

Abstract

This work addresses the tectonic significance of a NW-SE strike-slip fault zone in the Calabrian Arc of Southern Italy, the Rossano-San Nicola Fault Zone (RSFZ). High-quality seismic reflection and 1D forward models of exploration boreholes and pseudo-wells show that the RSFZ experienced multiple Miocene phases of contractional/transpressional tectonics. These were followed by crustal extension during the Pliocene in association with the oceanisation of the Tyrrhenian Sea, Apennine orogenesis, and collision between the Calabrian Arc and adjacent tectonic plates. Such a setting had a profound influence on the Crotone Basin and its economic potential: 1) tectonic reactivation allowed reservoir units of the Crotone Basin to be charged by gas derived from Triassic/Lower Jurassic source rocks, and 2) source rocks reached their maximum depth and remained in the gas generation window after the emplacement of a large mass-transport complex in the Pliocene. In the surrounding areas, tectonic activity near the RSFZ contributed to source-rock maturation by enhancing local sedimentation rates, particularly during Langhian (Middle Miocene) and Zanclean (early Pliocene) tectonics. This work is important as it demonstrates the tectono-stratigraphic evolution of the Crotone Basin to be closely related to the structural evolution of the RSFZ. Crucially, the study area reveals the first example of a gas field fully sealed by a large mass-transport complex. As a corollary, we tie the Late Cenozoic geological history of the Crotone Basin to the geodynamic evolution of the central Mediterranean region, namely the Ionian and Tyrrhenian seas. We identify new prospects in the Crotone Basin and provide a time frame for gas generation and accumulation in Southern Italy.


ISSN: 1354-0793
EISSN: 2041-496X
Serial Title: Petroleum Geoscience
Serial Volume: 29
Serial Issue: 2
Title: The Rossano-San Nicola fault zone evolution impacts the burial and maturation histories of the Crotone Basin, Calabrian Arc, Italy
Affiliation: University of Calabria, Department of Environmental Engineering, Arcavacata di Rende, Italy
Pages: Article petgeo2022-085
Published: 20230419
Text Language: English
Publisher: Geological Society Publishing House for EAGE (European Association of Geoscientists & Engineers), London, United Kingdom
References: 59
Accession Number: 2023-025610
Categories: Structural geologyEconomic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 2 tables, geol. sketch maps
N38°30'00" - N39°45'00", E16°30'00" - E17°19'60"
Secondary Affiliation: Cardiff University, GBR, United KingdomIstituto Nazionale di Oceanografia e di Geofisica Sperimentale, ITA, Italy
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2023, 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: 202317
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