The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment

The Sierras Australes of eastern Argentina record the progressive suturing of the Patagonian terrane with the South American craton during Permo-Triassic time. On the South American side of the suture, fold axes and axial plane cleavage show a systematic variation in orientation across the region, r...

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Detalles Bibliográficos
Autor principal: Selles Martinez, José
Publicado: 1989
Materias:
folding
suture zone
tectonics
transpression
Argentina, Buenos Aires Province, Sierras Australes
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v2_n4_p317_SellesMartinez
http://hdl.handle.net/20.500.12110/paper_08959811_v2_n4_p317_SellesMartinez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_08959811_v2_n4_p317_SellesMartinez
record_format dspace
spelling paper:paper_08959811_v2_n4_p317_SellesMartinez2023-06-08T15:48:30Z The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment Selles Martinez, José folding suture zone tectonics transpression Argentina, Buenos Aires Province, Sierras Australes The Sierras Australes of eastern Argentina record the progressive suturing of the Patagonian terrane with the South American craton during Permo-Triassic time. On the South American side of the suture, fold axes and axial plane cleavage show a systematic variation in orientation across the region, rotating counterclockwise from the southern and central segments to the northwestern segments. These data, in combination with finite strain measurements indicative of extension parallel to fold axes, suggest progressive, horizontal, simple shear with a left-lateral sense. Thus, the suturing probably had a strong, transpressive component. This conclusion explains the characteristic sigmoidal shape of the sierras and is supported by comparison with scale-model experiments conducted by other investigators. Furthermore, this interpretation is in agreement with paleomagnetic data. © 1989. Fil:Sellés Martínez, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1989 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v2_n4_p317_SellesMartinez http://hdl.handle.net/20.500.12110/paper_08959811_v2_n4_p317_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 folding
suture zone
tectonics
transpression
Argentina, Buenos Aires Province, Sierras Australes
spellingShingle folding
suture zone
tectonics
transpression
Argentina, Buenos Aires Province, Sierras Australes
Selles Martinez, José
The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment
topic_facet folding
suture zone
tectonics
transpression
Argentina, Buenos Aires Province, Sierras Australes
description The Sierras Australes of eastern Argentina record the progressive suturing of the Patagonian terrane with the South American craton during Permo-Triassic time. On the South American side of the suture, fold axes and axial plane cleavage show a systematic variation in orientation across the region, rotating counterclockwise from the southern and central segments to the northwestern segments. These data, in combination with finite strain measurements indicative of extension parallel to fold axes, suggest progressive, horizontal, simple shear with a left-lateral sense. Thus, the suturing probably had a strong, transpressive component. This conclusion explains the characteristic sigmoidal shape of the sierras and is supported by comparison with scale-model experiments conducted by other investigators. Furthermore, this interpretation is in agreement with paleomagnetic data. © 1989.
author Selles Martinez, José
author_facet Selles Martinez, José
author_sort Selles Martinez, José
title The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment
title_short The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment
title_full The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment
title_fullStr The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment
title_full_unstemmed The structure of the Sierras Australes (Buenos Aires Province, Argentina): An example of folding in a transpressive environment
title_sort structure of the sierras australes (buenos aires province, argentina): an example of folding in a transpressive environment
publishDate 1989
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v2_n4_p317_SellesMartinez
http://hdl.handle.net/20.500.12110/paper_08959811_v2_n4_p317_SellesMartinez
work_keys_str_mv AT sellesmartinezjose thestructureofthesierrasaustralesbuenosairesprovinceargentinaanexampleoffoldinginatranspressiveenvironment
AT sellesmartinezjose structureofthesierrasaustralesbuenosairesprovinceargentinaanexampleoffoldinginatranspressiveenvironment
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