Miocene progressive fore-arc extension in the central Mediterranean

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doi: 10.1016/j.tecto.2016.10.002
Author(s): Milia, Alfonsa; Valente, A.; Cavuoto, G.; Torrente, Maurizio M.
Author Affiliation(s): Primary:
CNR, Istituto per l'Ambiente Marino Costiero, Naples, Italy
Other:
Universita del Sannio, Italy
Volume Title: Evolution of fore-arc and back-arc sedimentary basins with focus on the Japan subduction system and its analogues
Volume Author(s): Sato, Hiroshi, editor; Ishiyama, Tatsuya; Matenco, Liviu; Henri, Fadi
Source: Evolution of fore-arc and back-arc sedimentary basins with focus on the Japan subduction system and its analogues, edited by Hiroshi Sato, Tatsuya Ishiyama, Liviu Matenco and Fadi Henri. Tectonophysics, Vol.710-711, p.232-248. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0040-1951 CODEN: TCTOAM
Note: In English. 102 refs.; illus., incl. sketch maps
Summary: Miocene extensional sedimentary basins are being increasingly recognized in Central Mediterranean. However the paleogeographic reconstruction of the Paleo-Tyrrhenian during this time span results a difficult task because the subsequent Pliocene-Quaternary backarc opening moved away these older sedimentary basins. Our study outlines principal deformation events recorded by sediments that were deposited within minor basins of the Tyrrhenian Sea region and provides constraints on the duration of these events. The interpretation of seismic profiles, wells, and outcrops data together with a review of the middle-upper Miocene successions permitted us to recognize Miocene third order depositional sequences, reconstruct the fault pattern, and furnish a detailed evolution of the sedimentary basins that preceded the Pliocene-Quaternary Tyrrhenian high stretching. Based on the stratigraphic and tectonic constraints together with the age migration of the depocenters, we reconstructed a detailed paleogeographic evolution of central Mediterranean. Sedimentary basins architecture and fault pattern indicate a system of approximately N-S oriented normal faults and approximately E-W transform faults that were active since the Late Oligocene. Two period of extensional/transtensional tectonics (late Oligocene-Lower Burdigalian and Upper Langhian-Tortonian) were interrupted by a compressional event (late Burdigalian-Lower Langhian). Tacking in account the position of the Miocene volcanic arc (Sardinia), we propose that the coeval sedimentary basins developed in the central Mediterranean as forearc extensional/transtensional basins during the progressive collision with the African plate and before the Tyrrhenian backarc opening. Unlike published late Oligocene-Tortonian reconstructions of the western-central Mediterranean realm that report a linear migration of backarc extension, our results support a geodynamic model characterized by a progressive deformation of the forearc extension in the overriding plate.
Year of Publication: 2017
Research Program: ODP Ocean Drilling Program
Key Words: 16 Structural Geology; Basin analysis; Basins; Bathymetry; Campania Italy; Cenozoic; Central Mediterranean Sea; Corsica; Depositional environment; Europe; Extension tectonics; Faults; Fore-arc basins; France; Geophysical methods; Geophysical surveys; Italy; Leg 107; Lithostratigraphy; Marine sediments; Mediterranean Sea; Miocene; Neogene; Neotectonics; Normal faults; ODP Site 654; Ocean Drilling Program; Offshore; Paleoenvironment; Paleogeography; Petroleum; Petroleum exploration; Reconstruction; Sardinia Italy; Sediments; Seismic methods; Sicily Italy; Southern Europe; Surveys; Systems; Tectonics; Tertiary; Tyrrhenian Sea; Well-logging; West Mediterranean; Western Europe
Coordinates: N403445 N403446 E0104148 E0104148
Record ID: 2017099777
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands