Geological and geophysical evidences of the polyphase structural evolution of the Southern Precordillera (31°42′S-69°24′W), central-western Argentina
- Ariza, Juan Pablo
- Sanchez, Marcos Ariel
- Boedo, Florencia Lucila
- Nacif Suvire, Silvina Valeria
- Contreras, Juan Cruz
- Ceballos, Juan P.
- Ludueña, Marcos A.
- Perez Lujan, Sofia Beatriz
- Vujovich, Graciela Irene
- Martínez, Myriam Patricia
DOIAbstract
The evolution of the western margin of South America comprised different tectonic regimes responsible of the present geological composition and structure of the Central Andes. Remote sensing, geological and geophysical data (aeromagnetic and seismological data) have been processed to understand the polyphase structural evolution of the Argentine Southern Precordillera. The outcrops exposed in the Sierra de Barreal (31°42′S-69°24′W) show evidences of a complex structural evolution related to the superposition of three orogenies from the Early Paleozoic to nowadays. The Chanic orogeny (Late Devonian) is characterized by two systems of non-coaxial ductile folds that affect Early Paleozoic rocks of the Ciénaga del Medio Group. The recognized ro...
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