Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka
International audience We present geomorphic, stratigraphic, and chronological data acquired along the General Carrera-Buenos Aires (GCBA) glacial lake located along a majormorphological incision across the Andes. Complementing relevant available data, relative chronology of morpho-climatic records...
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Online Access: | https://hal.science/hal-01271536 https://hal.science/hal-01271536/document https://hal.science/hal-01271536/file/80509%282%29.pdf https://doi.org/10.1086/684252 |
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ftcollegfrance:oai:HAL:hal-01271536v1 2024-06-23T07:53:50+00:00 Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka Bourgois, Jacques Cisternas, Maria Eugenia Braucher, Regis Bourles, Didier Frutos, José Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Instituto de Geologia Economica Aplicada Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) San Juan de Luz 4060 2016 https://hal.science/hal-01271536 https://hal.science/hal-01271536/document https://hal.science/hal-01271536/file/80509%282%29.pdf https://doi.org/10.1086/684252 en eng HAL CCSD University of Chicago Press info:eu-repo/semantics/altIdentifier/doi/10.1086/684252 hal-01271536 https://hal.science/hal-01271536 https://hal.science/hal-01271536/document https://hal.science/hal-01271536/file/80509%282%29.pdf doi:10.1086/684252 info:eu-repo/semantics/OpenAccess ISSN: 0022-1376 EISSN: 1537-5269 Journal of Geology https://hal.science/hal-01271536 Journal of Geology, 2016, 124 (1), pp.27-53. ⟨10.1086/684252⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2016 ftcollegfrance https://doi.org/10.1086/684252 2024-06-13T23:41:33Z International audience We present geomorphic, stratigraphic, and chronological data acquired along the General Carrera-Buenos Aires (GCBA) glacial lake located along a majormorphological incision across the Andes. Complementing relevant available data, relative chronology of morpho-climatic records together with 18 10Be Cosmic Ray Exposure (CRE) ages allow constraining the timing of the Patagonian ice-sheet fluctuations since the LGM. It improves the knowledge of the Patagonia climate evolution in the 46-48°S area, and allows documenting the uplift rates (glacial rebound) for the past ~7-9 ka. The first major ice lobe retreat occurred after 17.3 ± 0.6 ka and has likely continued during the ACR from ~12.9 to 14.5 ka. Between ~12.9 ka and ~10.9 ± 1.3 ka, the General Carrera Lake evolved as an endorheic basin. Terraces T4 to T1 (top to bottom) have recorded abrupt lake regressions likely controlled by rainfalldeficit. They have accumulated in the time interval ~17.3-12.3 ka (maximum limits). Two glacial re-advances at ~10.9 ± 1.3 and ~7.9 ± 1.1 ka marked a major climate change that led the lake to be ice-dammed again. A major transgression occurred subsequently that have flooded the previously accumulated terraces. Since then, a pervasive regression has steered the GCBA Lake to the situation at Present. The highest shoreline of the transgression is used as a passive marker in order to quantify the magnitude and character of the regional deformation. At 72°30' W, the GCBA Lakearea uplifted (glacial rebound) at a rate between 15 to 33.5 mm.yr--1 during the past ~7.9 ± 1.1 ka. We infer that the high uplift rate mainly originates from the North Patagonian icefield ice loss. Article in Journal/Newspaper Ice Sheet Collège de France: HAL Argentina Carrera ENVELOPE(-67.817,-67.817,-67.550,-67.550) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Patagonia The Journal of Geology 124 1 27 53 |
institution |
Open Polar |
collection |
Collège de France: HAL |
op_collection_id |
ftcollegfrance |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Bourgois, Jacques Cisternas, Maria Eugenia Braucher, Regis Bourles, Didier Frutos, José Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience We present geomorphic, stratigraphic, and chronological data acquired along the General Carrera-Buenos Aires (GCBA) glacial lake located along a majormorphological incision across the Andes. Complementing relevant available data, relative chronology of morpho-climatic records together with 18 10Be Cosmic Ray Exposure (CRE) ages allow constraining the timing of the Patagonian ice-sheet fluctuations since the LGM. It improves the knowledge of the Patagonia climate evolution in the 46-48°S area, and allows documenting the uplift rates (glacial rebound) for the past ~7-9 ka. The first major ice lobe retreat occurred after 17.3 ± 0.6 ka and has likely continued during the ACR from ~12.9 to 14.5 ka. Between ~12.9 ka and ~10.9 ± 1.3 ka, the General Carrera Lake evolved as an endorheic basin. Terraces T4 to T1 (top to bottom) have recorded abrupt lake regressions likely controlled by rainfalldeficit. They have accumulated in the time interval ~17.3-12.3 ka (maximum limits). Two glacial re-advances at ~10.9 ± 1.3 and ~7.9 ± 1.1 ka marked a major climate change that led the lake to be ice-dammed again. A major transgression occurred subsequently that have flooded the previously accumulated terraces. Since then, a pervasive regression has steered the GCBA Lake to the situation at Present. The highest shoreline of the transgression is used as a passive marker in order to quantify the magnitude and character of the regional deformation. At 72°30' W, the GCBA Lakearea uplifted (glacial rebound) at a rate between 15 to 33.5 mm.yr--1 during the past ~7.9 ± 1.1 ka. We infer that the high uplift rate mainly originates from the North Patagonian icefield ice loss. |
author2 |
Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Instituto de Geologia Economica Aplicada Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) San Juan de Luz 4060 |
format |
Article in Journal/Newspaper |
author |
Bourgois, Jacques Cisternas, Maria Eugenia Braucher, Regis Bourles, Didier Frutos, José |
author_facet |
Bourgois, Jacques Cisternas, Maria Eugenia Braucher, Regis Bourles, Didier Frutos, José |
author_sort |
Bourgois, Jacques |
title |
Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka |
title_short |
Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka |
title_full |
Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka |
title_fullStr |
Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka |
title_full_unstemmed |
Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°-48°S), Climate Inferences, and Glacial Rebound for the Past 7–9ka |
title_sort |
geomorphic records along the general carrera (chile)–buenos aires (argentina) glacial lake (46°-48°s), climate inferences, and glacial rebound for the past 7–9ka |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01271536 https://hal.science/hal-01271536/document https://hal.science/hal-01271536/file/80509%282%29.pdf https://doi.org/10.1086/684252 |
long_lat |
ENVELOPE(-67.817,-67.817,-67.550,-67.550) ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Argentina Carrera Glacial Lake Patagonia |
geographic_facet |
Argentina Carrera Glacial Lake Patagonia |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0022-1376 EISSN: 1537-5269 Journal of Geology https://hal.science/hal-01271536 Journal of Geology, 2016, 124 (1), pp.27-53. ⟨10.1086/684252⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1086/684252 hal-01271536 https://hal.science/hal-01271536 https://hal.science/hal-01271536/document https://hal.science/hal-01271536/file/80509%282%29.pdf doi:10.1086/684252 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1086/684252 |
container_title |
The Journal of Geology |
container_volume |
124 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
53 |
_version_ |
1802645672768307200 |