Geoelectrical study on structures associated to el tigre fault, San Juan

The Precordillera Argentina is the region with the greatest seismological activity in the country. El Tigre fault extends through the western margin of the San Juan Precordillera and it is an N-S trend regional strike-slip fault with dextral heading component that constitutes a unique structure due...

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Autores principales:	Peri, G., Fazzito, S., Bello Camilletti, G., Rapalini, A., Cortés, J.M.
Formato:	JOUR
Materias:	Electrical resistivity tomography Neotectonics Precordillera
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v74_n4_p468_Peri
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00044822_v74_n4_p468_Peri
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spelling	todo:paper_00044822_v74_n4_p468_Peri2023-10-03T13:59:21Z Geoelectrical study on structures associated to el tigre fault, San Juan Peri, G. Fazzito, S. Bello Camilletti, G. Rapalini, A. Cortés, J.M. Electrical resistivity tomography Neotectonics Precordillera The Precordillera Argentina is the region with the greatest seismological activity in the country. El Tigre fault extends through the western margin of the San Juan Precordillera and it is an N-S trend regional strike-slip fault with dextral heading component that constitutes a unique structure due to a good preservation of geomorphic displacement markers. The central part of the El Tigre fault shows several ~ NO-SE structures that seem to control the deformation related to accommodation in response to basement structures. This work presents two geoelectric profiles through oblique lineaments and on associated secondary structures. The lineaments related to subvertical faults affect the Neogene basement with no apparent tilt displacement and the kinematics was inferred by comparison with homologous structures of the Precordillera. This deformation would be Pliocene to early Pleistocene, according with recent paleomagnetic results in neogene and pleistocene rocks. Right-step sigmoidal folds at the eastern lower block of the El Tigre fault expose Neogene basement and Pleistocene deposits, due to an uplift and flexure of the substrate. The geoelectric profiles suggest that the folds are in response to subvertical faults activity. These structures are consistent with a dextral shear band bounded to the west and to the east by the El Tigre fault and a NNO-SSE fault, respectively. This deformation would be active until the late Pleistocene. The presented geophysical and geological evidences confirm the complexity of the deformation by rotation of multiple smaller blocks associated to the El Tigre fault and the importance of oblique structures that control the kinematics of the deformation. © 2017, Asociacion Geologica Argentina. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v74_n4_p468_Peri
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Electrical resistivity tomography Neotectonics Precordillera
spellingShingle	Electrical resistivity tomography Neotectonics Precordillera Peri, G. Fazzito, S. Bello Camilletti, G. Rapalini, A. Cortés, J.M. Geoelectrical study on structures associated to el tigre fault, San Juan
topic_facet	Electrical resistivity tomography Neotectonics Precordillera
description	The Precordillera Argentina is the region with the greatest seismological activity in the country. El Tigre fault extends through the western margin of the San Juan Precordillera and it is an N-S trend regional strike-slip fault with dextral heading component that constitutes a unique structure due to a good preservation of geomorphic displacement markers. The central part of the El Tigre fault shows several ~ NO-SE structures that seem to control the deformation related to accommodation in response to basement structures. This work presents two geoelectric profiles through oblique lineaments and on associated secondary structures. The lineaments related to subvertical faults affect the Neogene basement with no apparent tilt displacement and the kinematics was inferred by comparison with homologous structures of the Precordillera. This deformation would be Pliocene to early Pleistocene, according with recent paleomagnetic results in neogene and pleistocene rocks. Right-step sigmoidal folds at the eastern lower block of the El Tigre fault expose Neogene basement and Pleistocene deposits, due to an uplift and flexure of the substrate. The geoelectric profiles suggest that the folds are in response to subvertical faults activity. These structures are consistent with a dextral shear band bounded to the west and to the east by the El Tigre fault and a NNO-SSE fault, respectively. This deformation would be active until the late Pleistocene. The presented geophysical and geological evidences confirm the complexity of the deformation by rotation of multiple smaller blocks associated to the El Tigre fault and the importance of oblique structures that control the kinematics of the deformation. © 2017, Asociacion Geologica Argentina. All rights reserved.
format	JOUR
author	Peri, G. Fazzito, S. Bello Camilletti, G. Rapalini, A. Cortés, J.M.
author_facet	Peri, G. Fazzito, S. Bello Camilletti, G. Rapalini, A. Cortés, J.M.
author_sort	Peri, G.
title	Geoelectrical study on structures associated to el tigre fault, San Juan
title_short	Geoelectrical study on structures associated to el tigre fault, San Juan
title_full	Geoelectrical study on structures associated to el tigre fault, San Juan
title_fullStr	Geoelectrical study on structures associated to el tigre fault, San Juan
title_full_unstemmed	Geoelectrical study on structures associated to el tigre fault, San Juan
title_sort	geoelectrical study on structures associated to el tigre fault, san juan
url	http://hdl.handle.net/20.500.12110/paper_00044822_v74_n4_p468_Peri
work_keys_str_mv	AT perig geoelectricalstudyonstructuresassociatedtoeltigrefaultsanjuan AT fazzitos geoelectricalstudyonstructuresassociatedtoeltigrefaultsanjuan AT bellocamillettig geoelectricalstudyonstructuresassociatedtoeltigrefaultsanjuan AT rapalinia geoelectricalstudyonstructuresassociatedtoeltigrefaultsanjuan AT cortesjm geoelectricalstudyonstructuresassociatedtoeltigrefaultsanjuan
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Geoelectrical study on structures associated to el tigre fault, San Juan

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