Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation

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Group of microstructures present in the Ordovician Yerba Loca and Los Sombreros Formations (cropping out in the vicinity of Road 150, between cuesta del Viento and Los Túneles), are described and interpreted. Cleavage, joints and fractures, shear zones, planar and sigmoid (en echelon) veins and kink...

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Autores principales: Sellés-Martínez, J., Azcurra, D.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2010
Materias:
Jáchal River
Minor structures
Palaeozoic
Precordillera
Yerba Loca Formation
deformation
displacement
geological structure
headwater
microstructure
Ordovician
Paleozoic
recrystallization
shear zone
stress field
Argentina
Jachal River
San Juan [Argentina]
Croton ovalifolius
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p94_SellesMartinez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_00044822_v66_n1-2_p94_SellesMartinez2023-06-12T16:40:29Z Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation Rev. Asoc. Geol. Argent. 2010;66(1-2):94-101 Sellés-Martínez, J. Azcurra, D. Jáchal River Minor structures Palaeozoic Precordillera Yerba Loca Formation deformation displacement geological structure headwater microstructure Ordovician Paleozoic recrystallization shear zone stress field Argentina Jachal River San Juan [Argentina] Croton ovalifolius Group of microstructures present in the Ordovician Yerba Loca and Los Sombreros Formations (cropping out in the vicinity of Road 150, between cuesta del Viento and Los Túneles), are described and interpreted. Cleavage, joints and fractures, shear zones, planar and sigmoid (en echelon) veins and kink bands are most common among them. Folded and domino faulted quartz veins, resulting from pressure solution contraction during formation of axial plane cleavage, are an outstanding feature and allowed calculation of contraction associated to cleavage development. The assemblage of minor structures shows coherency with the major structures hosting them and evidences a systematic displacement and stacking of rock masses from west to east. They also show the important participation of pressure solution and re-crystallization processes during deformation, along with progressive deformation due to rotation of local structures in the regional stress field. Fil:Sellés-Martínez, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Azcurra, D. 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_v66_n1-2_p94_SellesMartinez
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 Jáchal River
Minor structures
Palaeozoic
Precordillera
Yerba Loca Formation
deformation
displacement
geological structure
headwater
microstructure
Ordovician
Paleozoic
recrystallization
shear zone
stress field
Argentina
Jachal River
San Juan [Argentina]
Croton ovalifolius
spellingShingle Jáchal River
Minor structures
Palaeozoic
Precordillera
Yerba Loca Formation
deformation
displacement
geological structure
headwater
microstructure
Ordovician
Paleozoic
recrystallization
shear zone
stress field
Argentina
Jachal River
San Juan [Argentina]
Croton ovalifolius
Sellés-Martínez, J.
Azcurra, D.
Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation
topic_facet Jáchal River
Minor structures
Palaeozoic
Precordillera
Yerba Loca Formation
deformation
displacement
geological structure
headwater
microstructure
Ordovician
Paleozoic
recrystallization
shear zone
stress field
Argentina
Jachal River
San Juan [Argentina]
Croton ovalifolius
description Group of microstructures present in the Ordovician Yerba Loca and Los Sombreros Formations (cropping out in the vicinity of Road 150, between cuesta del Viento and Los Túneles), are described and interpreted. Cleavage, joints and fractures, shear zones, planar and sigmoid (en echelon) veins and kink bands are most common among them. Folded and domino faulted quartz veins, resulting from pressure solution contraction during formation of axial plane cleavage, are an outstanding feature and allowed calculation of contraction associated to cleavage development. The assemblage of minor structures shows coherency with the major structures hosting them and evidences a systematic displacement and stacking of rock masses from west to east. They also show the important participation of pressure solution and re-crystallization processes during deformation, along with progressive deformation due to rotation of local structures in the regional stress field.
format Artículo
Artículo
publishedVersion
author Sellés-Martínez, J.
Azcurra, D.
author_facet Sellés-Martínez, J.
Azcurra, D.
author_sort Sellés-Martínez, J.
title Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation
title_short Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation
title_full Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation
title_fullStr Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation
title_full_unstemmed Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation
title_sort lower paleozoic microestructures in the headwaters of río jachal, san juan province: their description and interpretation
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p94_SellesMartinez
work_keys_str_mv AT sellesmartinezj lowerpaleozoicmicroestructuresintheheadwatersofriojachalsanjuanprovincetheirdescriptionandinterpretation
AT azcurrad lowerpaleozoicmicroestructuresintheheadwatersofriojachalsanjuanprovincetheirdescriptionandinterpretation
_version_ 1769810064271474688

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