Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy

<p>With the aim of unveiling evidence of Late Quaternary faulting, a series of ground-penetrating radar (GPR) profiles were acquired across the southern portion of the Fosso della Valle–Campotenese normal fault (VCT), located at the Campotenese continental basin (Mt. Pollino region) in the sou...

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Autores principales:	M. Ercoli, D. Cirillo, C. Pauselli, H. M. Jol, F. Brozzetti
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Geology QE1-996.5 Stratigraphy QE640-699
Acceso en línea:	https://doaj.org/article/eb1025c542644ff0bcb02c0795613a00
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spelling	oai:doaj.org-article:eb1025c542644ff0bcb02c0795613a002021-11-17T14:45:10ZGround-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy10.5194/se-12-2573-20211869-95101869-9529https://doaj.org/article/eb1025c542644ff0bcb02c0795613a002021-11-01T00:00:00Zhttps://se.copernicus.org/articles/12/2573/2021/se-12-2573-2021.pdfhttps://doaj.org/toc/1869-9510https://doaj.org/toc/1869-9529<p>With the aim of unveiling evidence of Late Quaternary faulting, a series of ground-penetrating radar (GPR) profiles were acquired across the southern portion of the Fosso della Valle–Campotenese normal fault (VCT), located at the Campotenese continental basin (Mt. Pollino region) in the southern Apennines active extensional belt (Italy). A set of 49 GPR profiles, traced nearly perpendicular to this normal fault, was acquired using 300 and 500 MHz antennas and carefully processed through a customized workflow. The data interpretation allowed us to reconstruct a pseudo-3D model depicting the boundary between the Mesozoic bedrock and the sedimentary fill of the basin, which were in close proximity to the fault. Once the GPR signature of faulting was reviewed and defined, we interpret near-surface alluvial and colluvial sediments dislocated by a set of conjugate (W- and E-dipping) discontinuities that penetrate inside the underlying Triassic dolostones. Close to the contact between the continental deposits and the bedrock, some buried scarps which offset wedge-shaped deposits are interpreted as coseismic ruptures, subsequently sealed by later deposits. Our pseudo-3D GPR dataset represented a good trade-off between a dense 3D-GPR volume and conventional 2D data, which normally requires a higher degree of subjectivity during the interpretation. We have thus reconstructed a reliable subsurface fault pattern, discriminating master faults and a series of secondary splays. This contribution better characterizes active Quaternary faults in an area which falls within the Pollino seismic gap and is considered prone to severe surface faulting. Our results encourage further research at the study site, whilst we also recommend our workflow for similar regions characterized by high seismic hazard and scarcity of near-surface geophysical data.</p>M. ErcoliM. ErcoliD. CirilloD. CirilloC. PauselliC. PauselliH. M. JolF. BrozzettiF. BrozzettiCopernicus PublicationsarticleGeologyQE1-996.5StratigraphyQE640-699ENSolid Earth, Vol 12, Pp 2573-2596 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5 Stratigraphy QE640-699
spellingShingle	Geology QE1-996.5 Stratigraphy QE640-699 M. Ercoli M. Ercoli D. Cirillo D. Cirillo C. Pauselli C. Pauselli H. M. Jol F. Brozzetti F. Brozzetti Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy
description	<p>With the aim of unveiling evidence of Late Quaternary faulting, a series of ground-penetrating radar (GPR) profiles were acquired across the southern portion of the Fosso della Valle–Campotenese normal fault (VCT), located at the Campotenese continental basin (Mt. Pollino region) in the southern Apennines active extensional belt (Italy). A set of 49 GPR profiles, traced nearly perpendicular to this normal fault, was acquired using 300 and 500 MHz antennas and carefully processed through a customized workflow. The data interpretation allowed us to reconstruct a pseudo-3D model depicting the boundary between the Mesozoic bedrock and the sedimentary fill of the basin, which were in close proximity to the fault. Once the GPR signature of faulting was reviewed and defined, we interpret near-surface alluvial and colluvial sediments dislocated by a set of conjugate (W- and E-dipping) discontinuities that penetrate inside the underlying Triassic dolostones. Close to the contact between the continental deposits and the bedrock, some buried scarps which offset wedge-shaped deposits are interpreted as coseismic ruptures, subsequently sealed by later deposits. Our pseudo-3D GPR dataset represented a good trade-off between a dense 3D-GPR volume and conventional 2D data, which normally requires a higher degree of subjectivity during the interpretation. We have thus reconstructed a reliable subsurface fault pattern, discriminating master faults and a series of secondary splays. This contribution better characterizes active Quaternary faults in an area which falls within the Pollino seismic gap and is considered prone to severe surface faulting. Our results encourage further research at the study site, whilst we also recommend our workflow for similar regions characterized by high seismic hazard and scarcity of near-surface geophysical data.</p>
format	article
author	M. Ercoli M. Ercoli D. Cirillo D. Cirillo C. Pauselli C. Pauselli H. M. Jol F. Brozzetti F. Brozzetti
author_facet	M. Ercoli M. Ercoli D. Cirillo D. Cirillo C. Pauselli C. Pauselli H. M. Jol F. Brozzetti F. Brozzetti
author_sort	M. Ercoli
title	Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy
title_short	Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy
title_full	Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy
title_fullStr	Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy
title_full_unstemmed	Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy
title_sort	ground-penetrating radar signature of quaternary faulting: a study from the mt. pollino region, southern apennines, italy
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/eb1025c542644ff0bcb02c0795613a00
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Ground-penetrating radar signature of Quaternary faulting: a study from the Mt. Pollino region, southern Apennines, Italy

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