Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province

A palaeomagnetic study was made on the Early Permian Del Salto Formation, exposed in the Western Precordillera (31.3°S, 69.2°W). Eleven sites were sampled for siltstone and fine-grained sandstone in the middle-upper part of the succession exposed in the creek at kilometre 114, San Juan. Standard dem...

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Detalles Bibliográficos
Autores principales: Rapalini, Augusto Ernesto, Mena, Mabel
Publicado: 2001
Materias:
Andes
Palaeomagnetism
Precordillera
Rotation
Tectonics
Upper Palaeozoic
paleomagnetism
Paleozoic
tectonic rotation
Argentina
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini
http://hdl.handle.net/20.500.12110/paper_00044822_v56_n4_p494_Rapalini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v56_n4_p494_Rapalini
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spelling paper:paper_00044822_v56_n4_p494_Rapalini2023-06-08T14:25:33Z Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province Rapalini, Augusto Ernesto Mena, Mabel Andes Palaeomagnetism Precordillera Rotation Tectonics Upper Palaeozoic paleomagnetism Paleozoic tectonic rotation Argentina A palaeomagnetic study was made on the Early Permian Del Salto Formation, exposed in the Western Precordillera (31.3°S, 69.2°W). Eleven sites were sampled for siltstone and fine-grained sandstone in the middle-upper part of the succession exposed in the creek at kilometre 114, San Juan. Standard demagnetization techniques permitted the identification of a characteristic remanence that showed good within-site consistency of direction at eight sites. Application of a tectonic correction showed that the characteristic remanence is pre-tectonic. A palaeomagnetic pole for the Del Salto Formation was computed, SC: 26.8°S, 357.0°E.δp = 4.4°, δm = 6.4°, N = 8. The position of SC indicates that the sampling locality underwent a counterclockwise rotation of about 40° around a vertical axis. The age of the rotation cannot be determined from the available data but it is most likely to have happened in either Permian or Late Cenozoic times. Fil:Rapalini, A.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mena, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini http://hdl.handle.net/20.500.12110/paper_00044822_v56_n4_p494_Rapalini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Andes
Palaeomagnetism
Precordillera
Rotation
Tectonics
Upper Palaeozoic
paleomagnetism
Paleozoic
tectonic rotation
Argentina
spellingShingle Andes
Palaeomagnetism
Precordillera
Rotation
Tectonics
Upper Palaeozoic
paleomagnetism
Paleozoic
tectonic rotation
Argentina
Rapalini, Augusto Ernesto
Mena, Mabel
Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
topic_facet Andes
Palaeomagnetism
Precordillera
Rotation
Tectonics
Upper Palaeozoic
paleomagnetism
Paleozoic
tectonic rotation
Argentina
description A palaeomagnetic study was made on the Early Permian Del Salto Formation, exposed in the Western Precordillera (31.3°S, 69.2°W). Eleven sites were sampled for siltstone and fine-grained sandstone in the middle-upper part of the succession exposed in the creek at kilometre 114, San Juan. Standard demagnetization techniques permitted the identification of a characteristic remanence that showed good within-site consistency of direction at eight sites. Application of a tectonic correction showed that the characteristic remanence is pre-tectonic. A palaeomagnetic pole for the Del Salto Formation was computed, SC: 26.8°S, 357.0°E.δp = 4.4°, δm = 6.4°, N = 8. The position of SC indicates that the sampling locality underwent a counterclockwise rotation of about 40° around a vertical axis. The age of the rotation cannot be determined from the available data but it is most likely to have happened in either Permian or Late Cenozoic times.
author Rapalini, Augusto Ernesto
Mena, Mabel
author_facet Rapalini, Augusto Ernesto
Mena, Mabel
author_sort Rapalini, Augusto Ernesto
title Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
title_short Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
title_full Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
title_fullStr Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
title_full_unstemmed Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
title_sort counterclockwise tectonic rotation of the del salto formation (lower permian), san juan province
publishDate 2001
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini
http://hdl.handle.net/20.500.12110/paper_00044822_v56_n4_p494_Rapalini
work_keys_str_mv AT rapaliniaugustoernesto counterclockwisetectonicrotationofthedelsaltoformationlowerpermiansanjuanprovince
AT menamabel counterclockwisetectonicrotationofthedelsaltoformationlowerpermiansanjuanprovince
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