Artículo
Abstract:
Palaeomagnetic data from 15 hand samples collected in a sequence of tuffs of Carboniferous age (Andacollo Series) exposed in western Argentina (37°10′S, 70°38′W) are given. These samples show hydrothermal alteration. After AF and thermal cleaning the majority of samples show reversed polarity and yield a palaeomagnetic pole at 73.6°S, 64.7°E (dψ = 6°, dχ = 9°). By comparing the position of this pole with the apparent polar wander curve recognized for the Late Palaeozoic and Mesozoic of South America, quantitative support for a Cretaceous age for the cleaned remanence of these samples is given. K-Ar dating of the Andacollo rocks indicates a mean age of 69 ± 4 m.y.; this suggests that the isotopic system of these rocks became closed in Late Cretaceous time. Palaeomagnetic and radiometric data agree indicating a Cretaceous age for the hydrothermal alteration of the Andacollo rocks. © 1978.
Registro:
| Documento: | Artículo |
| Título: | Palaeomagnetism and K-Ar dating of the Carboniferous Andacollo Series (Argentina) and the age of its hydrothermal overprinting |
| Autor: | Vilas, J.F.; Valencio, D.A. |
| Filiación: | Departamento de Ciencias Geológicas, Ciudad Universitaria, Pabellón 2, Buenos Aires, Argentina |
| Año: | 1978 |
| Volumen: | 40 |
| Número: | 1 |
| Página de inicio: | 101 |
| Página de fin: | 106 |
| DOI: | http://dx.doi.org/10.1016/0012-821X(78)90078-X |
| Título revista: | Earth and Planetary Science Letters |
| Título revista abreviado: | Earth Plan. Sci. Lett. |
| ISSN: | 0012821X |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v40_n1_p101_Vilas |
Referencias:
- Zöllner, Amos, Descripción geológica de la hoja 32b, Chos-Malal (1973) Serv. Nac. Minero Geol., Bol., 143, pp. 1-91
- Groeber, Observaciones geológicas a lo largo del meridiano 70 (1947) Rev. Asoc. Geol. Argent., 2, pp. 347-433
- Valencio, Vilas, Mendía, Palaeomagnetism of a sequence of red beds of the middle and upper sections of Paganzo Group (Argentina) and the correlation of Upper Palaeozoic-Lower Mesozoic rocks (1977) Geophysical Journal International, 51, pp. 59-74
- Fisher, Dispersion on a sphere (1953) Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 217, pp. 295-305. , Ser. A
- Linares, Valencio, Palaeomagnetism and K-Ar ages of some trachybasaltic dikes from Rio de los Molinos Province of Córdoba República Argentina (1975) Journal of Geophysical Research, 80, pp. 3315-3321
- Valencio, Rocha-Campos, Pacca, Palaeomagnetism of some sedimentary rocks of the late Palaeozoic Tubara˜o and Passa Dois Group from the ParanáBasin, Brazil (1975) Rev. Bras. Geocieˆnc., 53, pp. 186-197
- Creer, Palaeomagnetic data from the Gondwanic continents Philos (1965) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 258, pp. 27-40. , Ser. A
- Valencio, Vilas, Sequence of the continental movements occurred prior to and after the formation of the South Atlantic (1975) An Acad. Bras. Cieˆnc., (48 Supplementl.), pp. 377-386
Citas:
---------- APA ----------
Vilas, J.F. & Valencio, D.A. (1978) . Palaeomagnetism and K-Ar dating of the Carboniferous Andacollo Series (Argentina) and the age of its hydrothermal overprinting. Earth and Planetary Science Letters, 40(1), 101-106.http://dx.doi.org/10.1016/0012-821X(78)90078-X
---------- CHICAGO ----------
Vilas, J.F., Valencio, D.A. "Palaeomagnetism and K-Ar dating of the Carboniferous Andacollo Series (Argentina) and the age of its hydrothermal overprinting" . Earth and Planetary Science Letters 40, no. 1 (1978) : 101-106.http://dx.doi.org/10.1016/0012-821X(78)90078-X
---------- MLA ----------
Vilas, J.F., Valencio, D.A. "Palaeomagnetism and K-Ar dating of the Carboniferous Andacollo Series (Argentina) and the age of its hydrothermal overprinting" . Earth and Planetary Science Letters, vol. 40, no. 1, 1978, pp. 101-106.http://dx.doi.org/10.1016/0012-821X(78)90078-X
---------- VANCOUVER ----------
Vilas, J.F., Valencio, D.A. Palaeomagnetism and K-Ar dating of the Carboniferous Andacollo Series (Argentina) and the age of its hydrothermal overprinting. Earth Plan. Sci. Lett. 1978;40(1):101-106.http://dx.doi.org/10.1016/0012-821X(78)90078-X
