Crust-mantle interactions and generation of silicic melts: insights from the sarmiento complex, southern patagonian andes Report as inadecuate




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Francisco Hervé ; Umberto Cordani ; Hans-Joachim Massonne ;Andean Geology 2007, 34 2

Author: Mauricio Calderón

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Andean Geology ISSN: 0718-7092 revgeologica@sernageomin.cl Servicio Nacional de Geología y Minería Chile Calderón, Mauricio; Hervé, Francisco; Cordani, Umberto; Massonne, Hans-Joachim Crust-mantle interactions and generation of silicic melts: insights from the Sarmiento Complex, southern Patagonian Andes Andean Geology, vol.
34, núm.
2, julio, 2007, pp.
249-275 Servicio Nacional de Geología y Minería Santiago, Chile Disponible en: http:--www.redalyc.org-articulo.oa?id=173918417005 Cómo citar el artículo Número completo Más información del artículo Página de la revista en redalyc.org Sistema de Información Científica Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Crust-mantle interactions and generation of silicic melts: insights from the Sarmiento Complex, southern Patagonian Andes Mauricio Calderón Francisco Hervé Umberto Cordani Departamento de Geología, Universidad de Chile, Casilla 13518, Correo 21,Santiago, Chile caldera@esfera.cl fherve@cec.uchile.cl Centro de Pesquisas Geocronológicas, Universidade de São Paulo, Rua do Lago 562, Cidade Universitaria, São Paulo, CEP 05508-900, Brazil ucordani@usp.br Hans-Joachim Massonne Institut für Mineralogie und Kristallchemie, Universität Stuttgart, Azenbergstrasse 18, D-70174, Stuttgart, Germany h-j.massonne@imi.uni-stuttgart.de ABSTRACT A Late Jurassic seafloor remnant of the Rocas Verdes basin in southern Chile, the Sarmiento Complex (ca.
52°S), bears lithological layers with bimodal meta-igneous rocks appropriate for a comprehensive investigation of magma genesis in part of a lateral lithological transition from continental rifting to initial seafloor spreading.
Metamorphosed mafic rocks collected from different layers in the ophiolite pseudostratigraphy and a plagiogranite have positive εNd150 values ( 1 and 2).
Granophyres, which are crosscut by ophiolitic...





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