Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina)
In this classic segment, many tectonic processes, like flat-subduction, terrane accretion and steepening of the subduction, among others, provide a robust framework for their understanding. Five orogenic cycles, with variations in location and type of magmatism, tectonic regimes and development of d...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p13_Charrier http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p13_Charrier |
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paper:paper_03058719_v399_n_p13_Charrier2023-06-08T15:30:59Z Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) accretionary prism Andean orogeny Cambrian magmatism Ordovician Permian subduction zone tectonic evolution tectonic setting tectonostratigraphy Argentina Chile In this classic segment, many tectonic processes, like flat-subduction, terrane accretion and steepening of the subduction, among others, provide a robust framework for their understanding. Five orogenic cycles, with variations in location and type of magmatism, tectonic regimes and development of different accretionary prisms, show a complex evolution. Accretion of a continental terrane in the Pampean cycle exhumed lower to middle crust in Early Cambrian. The Ordovician magmatic arc, associated metamorphism and foreland basin formation characterized the Famatinian cycle. In Late Devonian, the collision of Chilenia and associated high-pressure/low-temperature metamorphism contrasts with the late Palaeozoic accretionary prisms. Contractional deformation in Early to Middle Permian was followed by extension and rhyolitic (Choiyoi) magmatism. Triassic to earliest Jurassic rifting was followed by subduction and extension, dominated by Pacific marine ingressions, during Jurassic and Early Cretaceous. The Late Cretaceous was characterized by uplift and exhumation of the Andean Cordillera. An Atlantic ingression occurred in latest Cretaceous. Cenozoic contraction and uplift pulses alternate with Oligocene extension. Late Cenozoic subduction was characterized by the Pampean flat-subduction, the clockwise block tectonic rotations in the normal subduction segments and the magmatism in Payenia. These processes provide evidence that the Andean tectonic model is far from a straightforward geological evolution. © 2015 The Geological Society of London. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p13_Charrier http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p13_Charrier |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
accretionary prism Andean orogeny Cambrian magmatism Ordovician Permian subduction zone tectonic evolution tectonic setting tectonostratigraphy Argentina Chile |
| spellingShingle |
accretionary prism Andean orogeny Cambrian magmatism Ordovician Permian subduction zone tectonic evolution tectonic setting tectonostratigraphy Argentina Chile Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) |
| topic_facet |
accretionary prism Andean orogeny Cambrian magmatism Ordovician Permian subduction zone tectonic evolution tectonic setting tectonostratigraphy Argentina Chile |
| description |
In this classic segment, many tectonic processes, like flat-subduction, terrane accretion and steepening of the subduction, among others, provide a robust framework for their understanding. Five orogenic cycles, with variations in location and type of magmatism, tectonic regimes and development of different accretionary prisms, show a complex evolution. Accretion of a continental terrane in the Pampean cycle exhumed lower to middle crust in Early Cambrian. The Ordovician magmatic arc, associated metamorphism and foreland basin formation characterized the Famatinian cycle. In Late Devonian, the collision of Chilenia and associated high-pressure/low-temperature metamorphism contrasts with the late Palaeozoic accretionary prisms. Contractional deformation in Early to Middle Permian was followed by extension and rhyolitic (Choiyoi) magmatism. Triassic to earliest Jurassic rifting was followed by subduction and extension, dominated by Pacific marine ingressions, during Jurassic and Early Cretaceous. The Late Cretaceous was characterized by uplift and exhumation of the Andean Cordillera. An Atlantic ingression occurred in latest Cretaceous. Cenozoic contraction and uplift pulses alternate with Oligocene extension. Late Cenozoic subduction was characterized by the Pampean flat-subduction, the clockwise block tectonic rotations in the normal subduction segments and the magmatism in Payenia. These processes provide evidence that the Andean tectonic model is far from a straightforward geological evolution. © 2015 The Geological Society of London. |
| title |
Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) |
| title_short |
Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) |
| title_full |
Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) |
| title_fullStr |
Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) |
| title_full_unstemmed |
Tectono-stratigraphic evolution of the Andean Orogen between 31 and 37°S (Chile and Western Argentina) |
| title_sort |
tectono-stratigraphic evolution of the andean orogen between 31 and 37°s (chile and western argentina) |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p13_Charrier http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p13_Charrier |
| _version_ |
1768546541563281408 |