Portal de Periódicos da CAPES

Early evolution of the Proto-Andean margin of South America

1998; Geological Society of America; Volume: 26; Issue: 8 Linguagem: Inglês

10.1130/0091-7613(1998)026 2.3.co;2

1943-2682

Carlos W. Rapela, R. J. Pankhurst, César Casquet, Edgardo G. Baldo, J. Saavedra, Carmen Galindo,

Geochemistry and Geologic Mapping

Research Article| August 01, 1998 Early evolution of the Proto-Andean margin of South America C. W. Rapela; C. W. Rapela 1Centro de Investigaciones Geológicas, Universidad Nacional de La Plata, Calle 1 No. 644, 1900 La Plata, Argentina Search for other works by this author on: GSW Google Scholar R. J. Pankhurst; R. J. Pankhurst 2British Antarctic Survey, Cambridge CB30ET, United Kingdom Search for other works by this author on: GSW Google Scholar C. Casquet; C. Casquet 3Departamento de Petrología y Geoquímica, Universidad Complutense, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar E. Baldo; E. Baldo 3Departamento de Petrología y Geoquímica, Universidad Complutense, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar J. Saavedra; J. Saavedra 4CSIC, Instituto de Agrobiología y Recursos Naturales, 37071 Salamanca, Spain Search for other works by this author on: GSW Google Scholar C. Galindo C. Galindo 3Departamento de Petrología y Geoquímica, Universidad Complutense, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (8): 707–710. https://doi.org/10.1130/0091-7613(1998)026 2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation C. W. Rapela, R. J. Pankhurst, C. Casquet, E. Baldo, J. Saavedra, C. Galindo; Early evolution of the Proto-Andean margin of South America. Geology 1998;; 26 (8): 707–710. doi: https://doi.org/10.1130/0091-7613(1998)026 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract From a detailed study of a 500 km transect in the Sierras Pampeanas, central-west Argentina, two pre-Silurian tectono-magmatic episodes are recognized and defined, each culminating in micro-continental collisions against the proto-Andean margin of Gondwana. The Pampean orogeny started in Early Cambrian time with short-lived subduction, indicated by ca. 535 Ma calc-alkaline granitoids. Following Pampean terrane collision, burial to granulite facies conditions (ca. 9 kbar) generated widespread migmatites and ca. 520 Ma highly peraluminous granites in the Eastern Sierras Pampeanas. After brief quiescence, a second major episode, the Famatinian orogeny, started with subduction ca. 490 Ma, forming a wide continental arc and ensialic backarc basin. This heralded the approach of Laurentia to Gondwana, during which the Precordillera terrane separated from the southern Appalachian region, finally colliding with Gondwana in Silurian–Devonian time. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.