The late Eocene–early Miocene El Maitén Belt evolution: Magmatic response to the changing subduction zone geodynamics
- Fernández Paz, Lucía
- Iannelli, Sofía
- Echaurren, Andrés
- Ramos, Miguel Esteban
- Bechis, Florencia
- Litvak, Vanesa Dafne
- Encinas, Alfonso
- Kasemann, Simone
- Lucassen, Friedrich
- Folguera Telichevsky, Andres
DOIAbstract
During Mid-Cenozoic times, voluminous and genetically heterogeneous volcanism took place across North Patagonia in response to a period of plate tectonic reorganization. One of these volcanic associations is represented by the El Maitén Belt, located to the east of the main Andes for over ~300 km. This volcanic belt reflects the evolution of a continental arc in an extensional setting with remarkable compositional variations between the late Eocene and the early Miocene. We present new field and isotopic data that, together with lithological, geochronological and geochemical data compilations, suggest significant changes in the nature and location of magmatic sources. This evolution may be summarized in three stages: i) incipient arc magmat...
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