Biblioteca de la Universidad Complutense de Madrid

Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina): evidence for Rodinia break-up along a proto-Iapetus rift?

Impacto



Baldo, Edgardo G. y Casquet, César y Pankhurst, R.J. y Galindo Francisco, Mª del Carmen y Rapela, Carlos W. y Fanning, C.M. y Dahlquist, Juan A. y Murra, Juan Alberto (2006) Neoproterozoic A-type magmatism in the Western Sierras Pampeanas (Argentina): evidence for Rodinia break-up along a proto-Iapetus rift? Terra nova, 18 (6). pp. 388-394. ISSN 0954-4879

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URL Oficial: http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-3121



Resumen

A-type orthogneisses of mid Neoproterozoic age (774 ± 6 Ma,
U-Pb SHRIMP zircon age), are reported for the first time from
the Grenvillian basement of the Western Sierras Pampeanas in
Argentina. These anorogenic meta-igneous rocks represent the
latest event of Rodinia break-up so far recognized in Grenvillian
basement exposures across Andean South America. Moreover,
they compare well with A-type granitoids and volcanic rocks
along the Appalachian margin of Laurentia (Blue Ridge), thus
adding to former evidence that the Western Sierras Pampeanas
Grenvillian basement was left on the conjugate rifted margin of
eastern Laurentia during Rodinia break-up and the consequent
opening of the Iapetus ocean.


Tipo de documento:Artículo
Información Adicional:

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Palabras clave:Neoproterozoic; Magmatism; Sierras Pampeanas (Argentina); Rodinia
Materias:Ciencias > Geología > Petrología
Código ID:12026
Depositado:17 Ene 2011 12:32
Última Modificación:01 Sep 2011 12:01

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