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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

Casquet, César and Pankhurst, R.J. and Fanning, C.M. and Baldo, Edgardo G. and Galindo Francisco, Mª del Carmen and Rapela, Carlos W. and González Casado, José Manuel and 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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Abstract

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.


Item Type:Article
Uncontrolled Keywords:Sierras Pampeanas; Argentina; Metamorphism; U–Pb SHRIMP zircon dating; Grenville
Subjects:Sciences > Geology > Petrology
ID Code:12165
Deposited On:03 Feb 2011 11:47
Last Modified:03 Feb 2011 11:47

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