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Geophysical investigation of the Isonzo Plain (NE Italy); imaging of the Dinaric-Alpine chain convergence zone

Flavio Accaino, Martina Busetti, Gualtiero Bohm, Luca Baradello, Alessandro Affatato, Michela Dal Cin and Daniel Nieto
Geophysical investigation of the Isonzo Plain (NE Italy); imaging of the Dinaric-Alpine chain convergence zone
Italian Journal of Geosciences (June 2019) 138 (2): 202-215

Abstract

We present the results of a geophysical study carried out in the Isonzo Plain (NE of Italy), where the Paleogene External Dinarides and the Neogene eastern Southern Alps merge. We aim to provide imaging on the geological and tectonic setting in the area of convergence of the two chains. To this purpose multichannel seismic and geo-electrical profiles were acquired. Seismic processing and tomographic inversion of the first arrivals of multichannel seismic data were performed, allowing us to define geometries and velocities of the buried structures. Our data indicate the occurrence of a deformed Dinaric foredeep due to the Paleogene south-west migration of the External Dinaric chain and to the Neogene tectonic activity of the S-verging eastern South-Alpine chain. In addition, Plio-Quaternary transpressional fault systems produced structural highs such as the rocky outcrop of the Farra Hills rising from the plain. Plio-Quaternary tectonic activity displaced the late Miocene - Pliocene erosive surface at the top of the terrigenous sediment that fills the foredeep. The imaging of the buried structures provide a possible correlation with those outcropping in the Collio Hills and Karst Plateau.


ISSN: 2038-1719
EISSN: 2038-1727
Serial Title: Italian Journal of Geosciences
Serial Volume: 138
Serial Issue: 2
Title: Geophysical investigation of the Isonzo Plain (NE Italy); imaging of the Dinaric-Alpine chain convergence zone
Affiliation: Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Sgonico, Italy
Pages: 202-215
Published: 201906
Text Language: English
Publisher: Societa Geologica Italiana, Rome, Italy
References: 46
Accession Number: 2019-063811
Categories: Structural geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., geol. sketch maps
N45°55'00" - N45°55'00", E13°31'60" - E13°31'60"
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, Societa Geologica Italiana. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201933
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