Biblioteca de la Universidad Complutense de Madrid

U–Pb SHRIMP zircon dating of Grenvillian metamorphism in Western Sierras Pampeanas (Argentina): Correlation with the Arequipa-Antofalla craton and constraints on the extent of the Precordillera Terrane

Impacto

Casquet, César y Pankhurst, R.J. y Fanning, C.M. y Baldo, Edgardo G. y Galindo Francisco, Mª del Carmen y Rapela, Carlos W. y González Casado, José Manuel y Dahlquist, Juan A. (2006) U–Pb SHRIMP zircon dating of Grenvillian metamorphism in Western Sierras Pampeanas (Argentina): Correlation with the Arequipa-Antofalla craton and constraints on the extent of the Precordillera Terrane. Gondwana research, 9 . pp. 524-529. ISSN 1342-937X

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Resumen

Metamorphism of Grenvillian age (ca. 1.2 Ga; U–Pb zircon dating) is recognized for the first time in the Western Sierras Pampeanas (Sierra de
Maz). Conditions reached granulite facies (ca. 780 °C and ca. 780 MPa). Comparing geochronological and petrological characteristics with other
outcrops of Mesoproterozoic basement, particularly in the northern and central Arequipa-Antofalla craton, we suggest that these regions were part
of a single continental crustal block from Mesoproterozoic times, and thus autochthonous or parautochthonous to Gondwana.


Tipo de documento:Artículo
Palabras clave:Sierras Pampeanas; Argentina; Metamorphism; U–Pb SHRIMP zircon dating; Grenville
Materias:Ciencias > Geología > Petrología
Código ID:12165
Depositado:03 Feb 2011 11:47
Última Modificación:03 Feb 2011 11:47

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