Grenvillian massif-type anorthosites in the Sierras Pampeanas

We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U–Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorp...

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Detalles Bibliográficos
Autores principales: Casquet, César, Pankhurst, Robert J., Rapela, Carlos Washington, Galindo, Carmen, Dahlquist, Juan A., Baldo, Edgardo G., Saavedra, Julio, González Casado, J.M., Fanning, Christopher
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Geología
Sierras Pampeanas
Argentina
Neoproterozoic
Rodinia
SHRIMP data
Anorthosites
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128391
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128391
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Sierras Pampeanas
Argentina
Neoproterozoic
Rodinia
SHRIMP data
Anorthosites
spellingShingle Geología
Sierras Pampeanas
Argentina
Neoproterozoic
Rodinia
SHRIMP data
Anorthosites
Casquet, César
Pankhurst, Robert J.
Rapela, Carlos Washington
Galindo, Carmen
Dahlquist, Juan A.
Baldo, Edgardo G.
Saavedra, Julio
González Casado, J.M.
Fanning, Christopher
Grenvillian massif-type anorthosites in the Sierras Pampeanas
topic_facet Geología
Sierras Pampeanas
Argentina
Neoproterozoic
Rodinia
SHRIMP data
Anorthosites
description We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U–Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism. These anorthosites are petrologically and geochemically comparable with those of the Grenville province of Laurentia. Palaeogeographical reconstructions of Rodinia at 1.0–1.1 Ga suggest that the Sierras Pampeanas anorthosites were part of a large anorthosite province in the late Mesoproterozoic.
format Articulo
Articulo
author Casquet, César
Pankhurst, Robert J.
Rapela, Carlos Washington
Galindo, Carmen
Dahlquist, Juan A.
Baldo, Edgardo G.
Saavedra, Julio
González Casado, J.M.
Fanning, Christopher
author_facet Casquet, César
Pankhurst, Robert J.
Rapela, Carlos Washington
Galindo, Carmen
Dahlquist, Juan A.
Baldo, Edgardo G.
Saavedra, Julio
González Casado, J.M.
Fanning, Christopher
author_sort Casquet, César
title Grenvillian massif-type anorthosites in the Sierras Pampeanas
title_short Grenvillian massif-type anorthosites in the Sierras Pampeanas
title_full Grenvillian massif-type anorthosites in the Sierras Pampeanas
title_fullStr Grenvillian massif-type anorthosites in the Sierras Pampeanas
title_full_unstemmed Grenvillian massif-type anorthosites in the Sierras Pampeanas
title_sort grenvillian massif-type anorthosites in the sierras pampeanas
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/128391
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