Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4728099 | Gondwana Research | 2006 | 6 Pages |
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.
Related Topics
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Earth and Planetary Sciences
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Authors
Cesar Casquet, Robert J. Pankhurst, C. Mark Fanning, Edgardo Baldo, Carmen Galindo, Carlos W. Rapela, Jose M. González-Casado, Juan A. Dahlquist,