Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile)
The area involved by the triple junction between the South American, Nazca and Antarctic plates activity was affected by Quaternary glaciations. Before 12,800 yrs BP an extended ice field occupied the top of the Patagonian Andes, irradiating glaciers towards the east and the west dominantly. Towards...
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ftconicet:oai:ri.conicet.gov.ar:11336/140519 2023-10-09T21:47:15+02:00 Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) Isla, Federico Ignacio Espinosa, Marcela Alcira application/pdf http://hdl.handle.net/11336/140519 eng eng Servicio Nacional de Geología y Minería info:eu-repo/semantics/altIdentifier/url/http://www.andeangeology.cl/index.php/revista1/article/view/V48n1-3173 info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.5027/andgeoV48n1-3173 http://hdl.handle.net/11336/140519 Isla, Federico Ignacio; Espinosa, Marcela Alcira; Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile); Servicio Nacional de Geología y Minería; Andean Geology; 48; 1; 5-2020; 94-109 0718-7092 0718-7106 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ glaciolacustrine deposits triple junction North Patagonian Ice Field Argentina Chile 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/10.5027/andgeoV48n1-3173 2023-09-24T18:49:21Z The area involved by the triple junction between the South American, Nazca and Antarctic plates activity was affected by Quaternary glaciations. Before 12,800 yrs BP an extended ice field occupied the top of the Patagonian Andes, irradiating glaciers towards the east and the west dominantly. Towards the east, the ice melted in piedmont lakes; towards the west, fjords melted into the Pacific Ocean. The Upper-Pleistocene climate amelioration caused the recession of those glaciers. Some piedmont lakes reversed their Atlantic outflow towards to the Pacific Ocean. The glaciers retreat caused the fluvial reactivations along crustal former faults that were located below the ice. The Patagonian ice field became therefore split into present Northern and Southern fields. At the second largest lake of South America, the Buenos Aires-General Carrera Lake, the water level dropped from about 500 m over present mean sea level to 230 m. Several glaciolacustrine deposits from this area are indicating significant variations caused by climatic changes, volcanism and tectonics, differing in spatial and temporal magnitudes. The triple junction activity involved subduction of the Chile Ridge below the continental South American plate, volcanic activity and faulting. During the glacier melting the Baker River captured three eastern-moving glacial systems towards the southwest, towards the Pacific Ocean. This rapid event is thought to occur 12,800 yrs BP. The lowering of these glaciolacustrine systems should be also interpreted in terms of the tectonic activity in the region and considering other processes operating in the lakes and within the watersheds. Fil: Isla, Federico Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Espinosa, Marcela Alcira. Consejo Nacional de ... Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Pacific Argentina Carrera ENVELOPE(-67.817,-67.817,-67.550,-67.550) The Baker ENVELOPE(-54.765,-54.765,49.667,49.667) Andean Geology 48 1 94 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
glaciolacustrine deposits triple junction North Patagonian Ice Field Argentina Chile https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
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glaciolacustrine deposits triple junction North Patagonian Ice Field Argentina Chile https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Isla, Federico Ignacio Espinosa, Marcela Alcira Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) |
topic_facet |
glaciolacustrine deposits triple junction North Patagonian Ice Field Argentina Chile https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The area involved by the triple junction between the South American, Nazca and Antarctic plates activity was affected by Quaternary glaciations. Before 12,800 yrs BP an extended ice field occupied the top of the Patagonian Andes, irradiating glaciers towards the east and the west dominantly. Towards the east, the ice melted in piedmont lakes; towards the west, fjords melted into the Pacific Ocean. The Upper-Pleistocene climate amelioration caused the recession of those glaciers. Some piedmont lakes reversed their Atlantic outflow towards to the Pacific Ocean. The glaciers retreat caused the fluvial reactivations along crustal former faults that were located below the ice. The Patagonian ice field became therefore split into present Northern and Southern fields. At the second largest lake of South America, the Buenos Aires-General Carrera Lake, the water level dropped from about 500 m over present mean sea level to 230 m. Several glaciolacustrine deposits from this area are indicating significant variations caused by climatic changes, volcanism and tectonics, differing in spatial and temporal magnitudes. The triple junction activity involved subduction of the Chile Ridge below the continental South American plate, volcanic activity and faulting. During the glacier melting the Baker River captured three eastern-moving glacial systems towards the southwest, towards the Pacific Ocean. This rapid event is thought to occur 12,800 yrs BP. The lowering of these glaciolacustrine systems should be also interpreted in terms of the tectonic activity in the region and considering other processes operating in the lakes and within the watersheds. Fil: Isla, Federico Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Espinosa, Marcela Alcira. Consejo Nacional de ... |
format |
Article in Journal/Newspaper |
author |
Isla, Federico Ignacio Espinosa, Marcela Alcira |
author_facet |
Isla, Federico Ignacio Espinosa, Marcela Alcira |
author_sort |
Isla, Federico Ignacio |
title |
Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) |
title_short |
Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) |
title_full |
Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) |
title_fullStr |
Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) |
title_full_unstemmed |
Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile) |
title_sort |
quaternary glaciolacustrine deposits around a triple junction site: paleolakes at the foot of the northern patagonian ice field (argentina and chile) |
publisher |
Servicio Nacional de Geología y Minería |
url |
http://hdl.handle.net/11336/140519 |
long_lat |
ENVELOPE(-67.817,-67.817,-67.550,-67.550) ENVELOPE(-54.765,-54.765,49.667,49.667) |
geographic |
Antarctic Pacific Argentina Carrera The Baker |
geographic_facet |
Antarctic Pacific Argentina Carrera The Baker |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.andeangeology.cl/index.php/revista1/article/view/V48n1-3173 info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.5027/andgeoV48n1-3173 http://hdl.handle.net/11336/140519 Isla, Federico Ignacio; Espinosa, Marcela Alcira; Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile); Servicio Nacional de Geología y Minería; Andean Geology; 48; 1; 5-2020; 94-109 0718-7092 0718-7106 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
op_doi |
https://doi.org/10.5027/andgeoV48n1-3173 |
container_title |
Andean Geology |
container_volume |
48 |
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1 |
container_start_page |
94 |
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1779310245889179648 |