Late Cretaceous to recent plate motions in western South America revisited
Se determina y discute la convergencia de placas en el margen occidental de América del Sur entre el Cretácico más tardío y el Reciente The Andean Cordillera has evolved since the Late Cretaceous in the context of subduction of oceanic lithosphere beneath continental lithosphere, making the kinemati...
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ftconicet:oai:ri.conicet.gov.ar:11336/68224 2023-10-09T21:47:14+02:00 Late Cretaceous to recent plate motions in western South America revisited Somoza, Ruben Ghidella de Hurtis, Marta Elba application/pdf http://hdl.handle.net/11336/68224 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2012.03.003 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0012821X12001173 http://hdl.handle.net/11336/68224 Somoza, Ruben; Ghidella de Hurtis, Marta Elba; Late Cretaceous to recent plate motions in western South America revisited; Elsevier Science; Earth and Planetary Science Letters; 331-332; 5-2012; 152-163 0012-821X CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Convergencia América del Sur Nazca Cenozoico Cretácico Tardío https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.epsl.2012.03.003 2023-09-24T18:28:34Z Se determina y discute la convergencia de placas en el margen occidental de América del Sur entre el Cretácico más tardío y el Reciente The Andean Cordillera has evolved since the Late Cretaceous in the context of subduction of oceanic lithosphere beneath continental lithosphere, making the kinematics between South America and its adjacent oceanic plates in the Pacific basin valuable to analyze the development of the Andean orogen. The latest Cretaceous–Cenozoic convergence history in western South America may be divided into three stages. The youngest Stage 1 (25–0 Ma) is characterized by ENE directed convergence of the Nazca plate toward most of South America, and by ~ E–W subduction of the Antarctic plate beneath southern Patagonia. The Nazca–South America convergence rate in Stage 1 shows a continuous decrease from the highest values in the Cenozoic (~ 15 cm/yr) to the present day values from GPS measurements (~ 7 cm/yr). Stage 2 (47–28 Ma) is characterized by NE directed subduction of Farallon with the convergence rate remaining almost constant during the entire interval. In those times obliquity was dextral in Chile, sinistral in southern Peru, while almost head-on convergence occurred in central and northern Peru. During latest Cretaceous to Early Eocene times (Stage 3) the Farallon plate was subducted beneath Perú and the Phoenix plate was subducted farther south, where a triple junction migrated southward along the Chilean margin. The subduction of the Farallon plate was rather slow with variable direction imposed by the position of the triple junction, whereas subduction of the Phoenix plate was rapid (> 10 cm/yr) and ESE directed. We present a working hypothesis suggesting no major changes in the age of subducted lithosphere in the Chile trench from Middle Eocene to Late Oligocene, followed by subduction of progressively older oceanic lithosphere in the early Neogene and progressively younger lithosphere during the late Neogene and the Quaternary. In addition, it is shown that South American ... Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Patagonia Pacific Chile Trench ENVELOPE(-75.760,-75.760,-53.123,-53.123) Earth and Planetary Science Letters 331-332 152 163 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Convergencia América del Sur Nazca Cenozoico Cretácico Tardío https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Convergencia América del Sur Nazca Cenozoico Cretácico Tardío https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Somoza, Ruben Ghidella de Hurtis, Marta Elba Late Cretaceous to recent plate motions in western South America revisited |
topic_facet |
Convergencia América del Sur Nazca Cenozoico Cretácico Tardío https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Se determina y discute la convergencia de placas en el margen occidental de América del Sur entre el Cretácico más tardío y el Reciente The Andean Cordillera has evolved since the Late Cretaceous in the context of subduction of oceanic lithosphere beneath continental lithosphere, making the kinematics between South America and its adjacent oceanic plates in the Pacific basin valuable to analyze the development of the Andean orogen. The latest Cretaceous–Cenozoic convergence history in western South America may be divided into three stages. The youngest Stage 1 (25–0 Ma) is characterized by ENE directed convergence of the Nazca plate toward most of South America, and by ~ E–W subduction of the Antarctic plate beneath southern Patagonia. The Nazca–South America convergence rate in Stage 1 shows a continuous decrease from the highest values in the Cenozoic (~ 15 cm/yr) to the present day values from GPS measurements (~ 7 cm/yr). Stage 2 (47–28 Ma) is characterized by NE directed subduction of Farallon with the convergence rate remaining almost constant during the entire interval. In those times obliquity was dextral in Chile, sinistral in southern Peru, while almost head-on convergence occurred in central and northern Peru. During latest Cretaceous to Early Eocene times (Stage 3) the Farallon plate was subducted beneath Perú and the Phoenix plate was subducted farther south, where a triple junction migrated southward along the Chilean margin. The subduction of the Farallon plate was rather slow with variable direction imposed by the position of the triple junction, whereas subduction of the Phoenix plate was rapid (> 10 cm/yr) and ESE directed. We present a working hypothesis suggesting no major changes in the age of subducted lithosphere in the Chile trench from Middle Eocene to Late Oligocene, followed by subduction of progressively older oceanic lithosphere in the early Neogene and progressively younger lithosphere during the late Neogene and the Quaternary. In addition, it is shown that South American ... |
format |
Article in Journal/Newspaper |
author |
Somoza, Ruben Ghidella de Hurtis, Marta Elba |
author_facet |
Somoza, Ruben Ghidella de Hurtis, Marta Elba |
author_sort |
Somoza, Ruben |
title |
Late Cretaceous to recent plate motions in western South America revisited |
title_short |
Late Cretaceous to recent plate motions in western South America revisited |
title_full |
Late Cretaceous to recent plate motions in western South America revisited |
title_fullStr |
Late Cretaceous to recent plate motions in western South America revisited |
title_full_unstemmed |
Late Cretaceous to recent plate motions in western South America revisited |
title_sort |
late cretaceous to recent plate motions in western south america revisited |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/68224 |
long_lat |
ENVELOPE(-75.760,-75.760,-53.123,-53.123) |
geographic |
Antarctic The Antarctic Patagonia Pacific Chile Trench |
geographic_facet |
Antarctic The Antarctic Patagonia Pacific Chile Trench |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2012.03.003 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0012821X12001173 http://hdl.handle.net/11336/68224 Somoza, Ruben; Ghidella de Hurtis, Marta Elba; Late Cretaceous to recent plate motions in western South America revisited; Elsevier Science; Earth and Planetary Science Letters; 331-332; 5-2012; 152-163 0012-821X CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.epsl.2012.03.003 |
container_title |
Earth and Planetary Science Letters |
container_volume |
331-332 |
container_start_page |
152 |
op_container_end_page |
163 |
_version_ |
1779310206946115584 |