New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén

New single zircon ages from hydrocarbon well cores in the A-1 Norte de la Dorsal and Anticlinal Campamento area of the Neuquén basin indicate that 199.0 ± 1.5 Ma andesite lava flow and 203.75 ± 0.26 Ma dacite breccia overlie a 286.5 ± 2.3 Ma granodiorite and 284.0 ± 1.3 Ma andesite dike. The Lower J...

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Autores principales: Schiuma, Mario, Llambías, Eduardo Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Geología
Ciencias Naturales
Neuquén basin
Precuyano cycle
Early jurassic
Calc-alkaline volcanics
Cuenca neuquina
Ciclo precuyano
Jurásico temprano
Volcánicas calco-alcalinas
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/95530
https://ri.conicet.gov.ar/11336/74976
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-95530
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Ciencias Naturales
Neuquén basin
Precuyano cycle
Early jurassic
Calc-alkaline volcanics
Cuenca neuquina
Ciclo precuyano
Jurásico temprano
Volcánicas calco-alcalinas
spellingShingle Geología
Ciencias Naturales
Neuquén basin
Precuyano cycle
Early jurassic
Calc-alkaline volcanics
Cuenca neuquina
Ciclo precuyano
Jurásico temprano
Volcánicas calco-alcalinas
Schiuma, Mario
Llambías, Eduardo Jorge
New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén
topic_facet Geología
Ciencias Naturales
Neuquén basin
Precuyano cycle
Early jurassic
Calc-alkaline volcanics
Cuenca neuquina
Ciclo precuyano
Jurásico temprano
Volcánicas calco-alcalinas
description New single zircon ages from hydrocarbon well cores in the A-1 Norte de la Dorsal and Anticlinal Campamento area of the Neuquén basin indicate that 199.0 ± 1.5 Ma andesite lava flow and 203.75 ± 0.26 Ma dacite breccia overlie a 286.5 ± 2.3 Ma granodiorite and 284.0 ± 1.3 Ma andesite dike. The Lower Jurassic volcanics were deposited on a regional erosion surface affecting the Permian rocks. In the studied area there is no record of Middle to Upper Triassic volcanics as in other areas of the basin. Exotic zircon crystals gave ages of Mesoproterozoic, Middle Cambian, Early Devonian and Early Carboniferous, suggesting a poliphasic basement. Chemical analyses of three selected samples show a calc-alkaline signature, supporting the existence of a volcanic arc at the Early Jurassic as it has been proposed for the center of the basin.
format Articulo
Articulo
author Schiuma, Mario
Llambías, Eduardo Jorge
author_facet Schiuma, Mario
Llambías, Eduardo Jorge
author_sort Schiuma, Mario
title New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén
title_short New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén
title_full New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén
title_fullStr New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén
title_full_unstemmed New ages and chemical analysis on Lower Jurassic volcanism close to the dorsal de Huincul, Neuquén
title_sort new ages and chemical analysis on lower jurassic volcanism close to the dorsal de huincul, neuquén
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/95530
https://ri.conicet.gov.ar/11336/74976
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