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Abstract:

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.

Registro:

Documento: Artículo
Título:Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province
Autor:Rapalini, A.E.; Mena, M.
Filiación:CONICET, Lab. de Paleomag. Daniel Valencio, Dept. Ciencias Geologicas FCEyN, Buenos Aires, Argentina
Palabras clave:Andes; Palaeomagnetism; Precordillera; Rotation; Tectonics; Upper Palaeozoic; paleomagnetism; Paleozoic; tectonic rotation; Argentina
Año:2001
Volumen:56
Número:4
Página de inicio:494
Página de fin:502
Título revista:Revista de la Asociacion Geologica Argentina
Título revista abreviado:Rev. Asoc. Geol. Argent.
ISSN:00044822
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00044822_v56_n4_p494_Rapalini.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini

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Citas:

---------- APA ----------
Rapalini, A.E. & Mena, M. (2001) . Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province . Revista de la Asociacion Geologica Argentina, 56(4), 494-502.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini [ ]
---------- CHICAGO ----------
Rapalini, A.E., Mena, M. "Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province " . Revista de la Asociacion Geologica Argentina 56, no. 4 (2001) : 494-502.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini [ ]
---------- MLA ----------
Rapalini, A.E., Mena, M. "Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province " . Revista de la Asociacion Geologica Argentina, vol. 56, no. 4, 2001, pp. 494-502.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini [ ]
---------- VANCOUVER ----------
Rapalini, A.E., Mena, M. Counterclockwise tectonic rotation of the Del Salto Formation (Lower Permian), San Juan Province . Rev. Asoc. Geol. Argent. 2001;56(4):494-502.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n4_p494_Rapalini [ ]