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

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:	Selles Martinez, José, Azcurra, Diego
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v66_n1-2_p94_SellesMartinez 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

id	paper:paper_00044822_v66_n1-2_p94_SellesMartinez
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spelling	paper:paper_00044822_v66_n1-2_p94_SellesMartinez2023-06-08T14:26:24Z Lower Paleozoic microestructures in the headwaters of Río Jachal, San Juan Province: Their description and interpretation Selles Martinez, José Azcurra, Diego 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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v66_n1-2_p94_SellesMartinez 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)
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 Selles Martinez, José Azcurra, Diego 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.
author	Selles Martinez, José Azcurra, Diego
author_facet	Selles Martinez, José Azcurra, Diego
author_sort	Selles Martinez, José
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	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v66_n1-2_p94_SellesMartinez http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p94_SellesMartinez
work_keys_str_mv	AT sellesmartinezjose lowerpaleozoicmicroestructuresintheheadwatersofriojachalsanjuanprovincetheirdescriptionandinterpretation AT azcurradiego lowerpaleozoicmicroestructuresintheheadwatersofriojachalsanjuanprovincetheirdescriptionandinterpretation
_version_	1768543971162718208

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

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