Late Paleozoic-Early Triassic magmatic activity of Argentina and the significance of new RbSr ages from northern Patagonia
The main outcrops of late Paleozoic-Early Triassic magmatic rocks of Argentina are found on the eastern side of the Andes between 28°S and 36°S (Frontal Cordillera) and in the northern part of the Patagonian Platform (North Patagonian Massif) between 39°S and 44°S. These rocks belong to three magmat...
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1988
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| LEADER | 10213caa a22007817a 4500 | ||
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| 001 | PAPER-18045 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204924.0 | ||
| 008 | 190411s1988 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0024191351 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Caminos, R. | |
| 245 | 1 | 0 | |a Late Paleozoic-Early Triassic magmatic activity of Argentina and the significance of new RbSr ages from northern Patagonia |
| 260 | |c 1988 | ||
| 270 | 1 | 0 | |m Caminos, R.; Secretaría de Minería, Santa Fe 1548, Piso 12, 1060 Buenos Aires, Argentina |
| 506 | |2 openaire |e Política editorial | ||
| 504 | |a Caminos, Cordillera Frontal (1979) Geología Regional Argentina, 1, pp. 397-453. , Academia Nacional de Ciencias, Córdoba | ||
| 504 | |a Caminos, (1983) Descripción Geológica de las Hojas 39g, Cerro Tapiluke y 39h, Chipauquil, Provincia de Rio Negro, p. 41. , Servicio Geológico Nacional, Buenos Aires | ||
| 504 | |a Caminos, Llambías, El basamento cristalino (1984) Relatorio, IX Congreso Geológico Argentino, San Carlos de Bariloche, 1, pp. 37-63. , 2 | ||
| 504 | |a Caminos, Parica, The significance of new RbSr ages of igneous rocks from northern Patagonia (1985) Evolución Magmática de los Andes, 35, pp. 41-43. , F. Hervé, F. Munizaga, Comunicaciones (Santiago) | ||
| 504 | |a Caminos, Cordani, Linares, Geocronología y geología de las rocas metamórficas y eruptivas de la Precordillera y Cordillera Frontal de Mendoza (1979) Actas, II Congresp Geológico Chileno, Arica, 1, pp. F43-F61 | ||
| 504 | |a Faure, Powell, (1972) Strontium Isotope Geology, p. 188. , Springer-Verlag, New York | ||
| 504 | |a Forsythe, The late Paleozoic to early Mesozoic evolution of southern South America A plate tectonic interpretation (1982) Journal of the Geological Society, 126 (6), pp. 671-682 | ||
| 504 | |a Frutos, Tobar, Evolution of the southwestern continental margin of South America (1975) Australia: Gondwana Geology — Proceedings of the Third International Gondwana Symposium, pp. 565-578. , K.S.W. Cambell, Canberra, 1963, Australian National University Press, Canberra | ||
| 504 | |a Groeber, Líneas Fundamentales de la Geología del Neuquén, sur de Mendoza y Regiones Adyacentes (1929) Dirección de Minas, Geología e Hidrogeología, Buenos Aires, Publicación, 58, p. 109 | ||
| 504 | |a Halpern, Ages of Antarctic and Argentine rocks bearing on continental drift (1968) Earth and Planetary Science Letters, 5, pp. 159-167 | ||
| 504 | |a Hervé, Davidson, Godoy, Mpodozis, Covacevich, The late Paleozoic in Chile: Stratigraphy, structure, and possible tectonic framework (1981) Anales Academia Brasileira de Ciencias, 53 (2), pp. 361-373 | ||
| 504 | |a Liambías, Rapela, Geología de los complejos eruptivos de La Esperanza, Provincia de Rio Negro (1984) Revista Asociación Geológica Argentina, 39 (3-4), pp. 220-243 | ||
| 504 | |a Llambias, Caminos, Rapela, Las plutonitas y vulcanitas del ciclo eruptivo gondwánico (1984) Relatorio, IX Congreso Geológico Argentino, San Carlos de Bariloche, 1, pp. 85-117. , 4 | ||
| 504 | |a Llambías, Rapela, Parica, RbSr geochronology of La Esperanza eruptive complexes, North Patagonian Massif (68°28′W, 40°28′S) (1985) Evolución Magmática de los Andes, 35, pp. 139-143. , F. Hervé, F. Munizaga, Comunicaciones (Santiago) | ||
| 504 | |a Llambías, Sato, Puigdomenech, Castro, Neopaleozoic batholiths and their tectonic setting: Frontal Range of Argentina between 29° and 31°S (1987) Actas, X Congreso Geológico Argentino, Tucumán, 4, pp. 92-95 | ||
| 504 | |a McIntyre, Brooks, Compston, Turek, The statistical assessment of RbSr isochrons (1966) Journal of Geophysical Research, 71 (22), pp. 5459-5468 | ||
| 504 | |a Malvicini, Delpino, Metalogénesis de los complejos riolíticos de la provincia geológica Sanrafaelino-Pampeana y la comarca Nordpatagónica, Argentina (1987) Actas, X Congreso Geológico Argentino, Tucumán, , in press | ||
| 504 | |a Micromass, (1979) Owner's Manual, pp. 1-108. , Vacuum Generators, Ltd, London, UK | ||
| 504 | |a Mpodozis, Parada, Rivano, Vicente, Acerca del magmatismo tardi-hercínico de la Cordillera Frontal entre los 30° y 33°S (Provincias de Mendoza y San Juan, Argentina; Coquimbo, Chile) (1976) Actas, VI Congreso Geológico Argentino, Bahía Blanca, 1, pp. 143-166 | ||
| 504 | |a Nasi, Mpodozis, Cornejo, Makesaev, Parada, El Batolito Elqui-Limarí (Paleozoico superior-Triásico): Características petrográfias, geoquímicas y significado tectonico (1985) Revista Geológica de Chile, 25-26, pp. 77-111 | ||
| 504 | |a Parada, Lower Triassic alkaline granites of Central Chile (30° S) in the high-Andean Cordillera (1981) Geologische Rundschau, 70 (3), pp. 1043-1053 | ||
| 504 | |a Polanski, El bloque varíscico de la Cordillera Frontal de Mendoza (1958) Revista Asociación Geológica Argentina, 12 (3), pp. 165-196 | ||
| 504 | |a Ramos, Ramos, Los ciclos magmáticos de la República Argentina (1979) Actas, VII Congreso Geológico Argentino, Neuquén, 2, pp. 311-325 | ||
| 504 | |a Ramos, Patagonia: ¿Un continente Paleozoico a la deriva? (1984) Actas, IX Congreso Geológico Argentina, San Carlos de Bariloche, 2, pp. 311-325 | ||
| 504 | |a Rapela, Caminos, Geochemical characteristics of the upper Paleozoic magmatism in the eastern sector of the North Patagonian Massif (40°45′S, 67°00′W) (1987) ISGAM, Revista Brasileña Geociencias, , in press | ||
| 504 | |a Rapela, Llambías, Evolución magmática y relaciones regionales de los complejos eruptivos de La Esperanza, Provincia de Rio Negro (1985) Revista Asociación Geológica Argentina, 40 (1-2), pp. 4-25 | ||
| 504 | |a Rosenman, (1979) Geología de la Zona Comprendida entre La Esperanza, Aguada de Guerra y Los Menucos, p. 89. , Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Unpublished doctoral thesis | ||
| 504 | |a Stipanicic, Consideraciones sobre las edades de algunas fases magmáticas del Neopaleozoico y Mesozoico (1967) Revista Asociación Geológica Argentina, 22 (2), pp. 101-133 | ||
| 504 | |a Stipanicic, Linares, Edades radiométricas determinadas para la República Argentina y su significado geológico (1969) Academia Nacional de Ciencias, Córdoba, Boletín, 47, pp. 51-96 | ||
| 504 | |a Stipanicic, Methol, Comarca Norpatagónica (1980) Geología Regional Argentina, 2, pp. 1071-1097. , Academia Nacional de Ciencias, Córdoba | ||
| 520 | 3 | |a The main outcrops of late Paleozoic-Early Triassic magmatic rocks of Argentina are found on the eastern side of the Andes between 28°S and 36°S (Frontal Cordillera) and in the northern part of the Patagonian Platform (North Patagonian Massif) between 39°S and 44°S. These rocks belong to three magmatic episodes - dated, respectively, at about 350-330, 280-210, and 240-210 Ma - and consist of granitic bodies of batholitic size associated with coeval silicic to intermediate volcanics. In both regions, late underformed granites and granodiorites predominate over tonalites and diorites; gabbros are not common, but microdioritic dikes are abundant. All sequences show typical calc-alkaline trends, but although the older units are metaluminous, the younger events become peraluminous with slight transitions to peralkaline composition in the more differentiated types. Despite the magmatic similarities between the Frontal Cordillera and the North Patagonian Massif, these areas differ in other aspects of geologic history. A comparative scheme of the igneous and tectonic evolution of both regions during late Paleozoic-Early Triassic times is given, and the principal geologic features of two eruptive complexes studied in the North Pantagonian Massif are summarized. New RbSr whole rock isochron ages obtained from the North Patagonian Massif eruptive complexes confirm the existence of Early to Middle Carboniferous (332-317 Ma) plutonic and plutonic-volcanic activity in northern Patagonia. These ages are older than those previously reported for the same sequences, which were considered Permian or Triassic according to KAr data and RbSr errorchrons. Hence, a re-evaluation of some Permian or Triassic ages previously obtained in other sectors of the North Patagonian Massif is suggested. Moreover, the new ages, together with field observations, indicate that the plutonic episode had a volcanic counterpart not reported in former studies. These data support the hypothesis that a major magmatic cycle developed in the North Patagonian Massif during the Early-Middle Carboniferous, and that since that time a process of progressive uplift and cratonization has taken place in the region. © 1988. |l eng | |
| 593 | |a Secretaría de Minería, Santa Fe 1548, Piso 12, 1060 Buenos Aires, Argentina | ||
| 593 | |a CONICET, Secretaría de Minería, Santa Fe 1548, Piso 11, 1060 Buenos Aires, Argentina | ||
| 593 | |a CONICET, Universidad Nacional de La Plata, Centro de Investigationes Geológicas, Calle 1, No. 644, 1900 La Plata, Argentina | ||
| 593 | |a CONICETINGEIS, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a MAGMATIC ACTIVITY |
| 690 | 1 | 0 | |a PALEOZOIC |
| 690 | 1 | 0 | |a RUBIDIUM/STRONTIUM ISOTOPES |
| 690 | 1 | 0 | |a TRIASSIC |
| 651 | 4 | |a ARGENTINA, PATAGONIA | |
| 700 | 1 | |a Llambias, E.J. | |
| 700 | 1 | |a Rapela, C.W. | |
| 700 | 1 | |a Parica, C.A. | |
| 773 | 0 | |d 1988 |g v. 1 |h pp. 137-145 |k n. 2 |p J. South Am. Earth Sci. |x 08959811 |w (AR-BaUEN)CENRE-1080 |t Journal of South American Earth Sciences | |
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