Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas

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Along the eastern front of the Sierra de Velasco and at the southern end of the Sierra de Ambato, western Sierras Pampeanas, have been found new evidences of Quaternary tectonic activity near La Rioja city. Observed evidences correspond to different reactivated sections of the faults that bound the...

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Autores principales: Casa, A.L., Yamin, M.G., Cegarra, M.I., Coppolecchia, M., Costa, C.H.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2010
Materias:
Ambato range
Neotectonics
Quaternary
Sierras pampeanas
Velasco range
compression
deformation
neotectonics
piedmont
reverse fault
structural geology
uplift
Ambato
Argentina
Catamarca
Sierras Pampeanas
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v67_n4_p425_Casa
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_00044822_v67_n4_p425_Casa2023-06-12T16:40:34Z Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas Rev. Asoc. Geol. Argent. 2010;67(4):425-438 Casa, A.L. Yamin, M.G. Cegarra, M.I. Coppolecchia, M. Costa, C.H. Ambato range Neotectonics Quaternary Sierras pampeanas Velasco range compression deformation neotectonics piedmont Quaternary reverse fault structural geology uplift Ambato Argentina Catamarca Sierras Pampeanas Along the eastern front of the Sierra de Velasco and at the southern end of the Sierra de Ambato, western Sierras Pampeanas, have been found new evidences of Quaternary tectonic activity near La Rioja city. Observed evidences correspond to different reactivated sections of the faults that bound the mountain fronts, as well as to structures affecting the Quaternary deposits on the piedmont. The bounding faults of the Sierra de Velasco Oriental-front exhibit a NNE trend and WNW dip, while structures at the southernmost Ambato range are characterized by NE trend and NW dip. The neotectonic faults of the El Carrizal block are the result of the interference of both structural trends, resulting in a sector with higher structural complexity. The here described deformation show the persistence of a compressive regime during the Quaternary, with eastern to southeastern verging reverse faults. It is considering that these faults are driving the current uplift of the mountain ranges and constitute potential earthquake sources. Fil:Casa, A.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Yamin, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cegarra, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Coppolecchia, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v67_n4_p425_Casa
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Ambato range
Neotectonics
Quaternary
Sierras pampeanas
Velasco range
compression
deformation
neotectonics
piedmont
Quaternary
reverse fault
structural geology
uplift
Ambato
Argentina
Catamarca
Sierras Pampeanas
spellingShingle Ambato range
Neotectonics
Quaternary
Sierras pampeanas
Velasco range
compression
deformation
neotectonics
piedmont
Quaternary
reverse fault
structural geology
uplift
Ambato
Argentina
Catamarca
Sierras Pampeanas
Casa, A.L.
Yamin, M.G.
Cegarra, M.I.
Coppolecchia, M.
Costa, C.H.
Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas
topic_facet Ambato range
Neotectonics
Quaternary
Sierras pampeanas
Velasco range
compression
deformation
neotectonics
piedmont
Quaternary
reverse fault
structural geology
uplift
Ambato
Argentina
Catamarca
Sierras Pampeanas
description Along the eastern front of the Sierra de Velasco and at the southern end of the Sierra de Ambato, western Sierras Pampeanas, have been found new evidences of Quaternary tectonic activity near La Rioja city. Observed evidences correspond to different reactivated sections of the faults that bound the mountain fronts, as well as to structures affecting the Quaternary deposits on the piedmont. The bounding faults of the Sierra de Velasco Oriental-front exhibit a NNE trend and WNW dip, while structures at the southernmost Ambato range are characterized by NE trend and NW dip. The neotectonic faults of the El Carrizal block are the result of the interference of both structural trends, resulting in a sector with higher structural complexity. The here described deformation show the persistence of a compressive regime during the Quaternary, with eastern to southeastern verging reverse faults. It is considering that these faults are driving the current uplift of the mountain ranges and constitute potential earthquake sources.
format Artículo
Artículo
publishedVersion
author Casa, A.L.
Yamin, M.G.
Cegarra, M.I.
Coppolecchia, M.
Costa, C.H.
author_facet Casa, A.L.
Yamin, M.G.
Cegarra, M.I.
Coppolecchia, M.
Costa, C.H.
author_sort Casa, A.L.
title Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas
title_short Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas
title_full Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas
title_fullStr Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas
title_full_unstemmed Quaternary deformation associated with the eastern uplift front of the Sierras de Velasco and Ambato, western Sierras Pampeanas
title_sort quaternary deformation associated with the eastern uplift front of the sierras de velasco and ambato, western sierras pampeanas
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_00044822_v67_n4_p425_Casa
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