Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas

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The region is situated in the Neuquén Cordillera at 38° 30'S latitud close to the international border. Geomorphic and structural features are presented which indicated a glacial morphogenesis for the depression that contains the Moquehue- Aluminé lakes. Previous works have identified a large v...

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Autores principales: González Díaz, E.F., di Tommaso, I.
Formato: JOUR
Materias:
Calderas
Glacial difluence
Glaciation
Moquehue-Aluminé lakes
caldera
cordillera
facies
geomorphology
glacial erosion
glaciation
glacier
island arc
lake
morphogenesis
trough
volcanism
Argentina
Neuquen
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v66_n3_p438_GonzalezDiaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v66_n3_p438_GonzalezDiaz
record_format dspace
spelling todo:paper_00044822_v66_n3_p438_GonzalezDiaz2023-10-03T13:58:44Z Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas González Díaz, E.F. di Tommaso, I. Calderas Glacial difluence Glaciation Moquehue-Aluminé lakes caldera cordillera facies geomorphology glacial erosion glaciation glacier island arc lake morphogenesis trough volcanism Argentina Neuquen The region is situated in the Neuquén Cordillera at 38° 30'S latitud close to the international border. Geomorphic and structural features are presented which indicated a glacial morphogenesis for the depression that contains the Moquehue- Aluminé lakes. Previous works have identified a large volcanic complex related to Plio-Quaternary volcanic activity located at the east of the present volcanic arc. In this sector various caldera depressions and associated domic bodies have been identified. From the nine proposed calderas only the Pino Hachado caldera has been studied in detail. The Meseta del Arco and Nacimientos del Aluminé are disregarded as calderas. The erosional genesis of the steep scarps previously interpreted as caldera margins is also identified with glacial erosion. Facies and types of the local Pleistocene glaciation, its extension, their flow direction and its quite probable diffluence (Paso del Arco) through coeval glaciers situated north of the international border are also analyzed. Local characteristics of volcanic and eolian morphogenic and the mass-wasting process are described. Brief comments about pre-glacial drainage and the previous proposal of Bío Bío-Aluminé trough on the region are added. Transversal topographic-geological profiles discard west of the Bío Bío-Aluminé Fault a structural unit related to tectonic depression of Bío Bío-Aluminé trough and the Nacimientos del Aluminé and Moquehue calderas. Fil:di Tommaso, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v66_n3_p438_GonzalezDiaz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Calderas
Glacial difluence
Glaciation
Moquehue-Aluminé lakes
caldera
cordillera
facies
geomorphology
glacial erosion
glaciation
glacier
island arc
lake
morphogenesis
trough
volcanism
Argentina
Neuquen
spellingShingle Calderas
Glacial difluence
Glaciation
Moquehue-Aluminé lakes
caldera
cordillera
facies
geomorphology
glacial erosion
glaciation
glacier
island arc
lake
morphogenesis
trough
volcanism
Argentina
Neuquen
González Díaz, E.F.
di Tommaso, I.
Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas
topic_facet Calderas
Glacial difluence
Glaciation
Moquehue-Aluminé lakes
caldera
cordillera
facies
geomorphology
glacial erosion
glaciation
glacier
island arc
lake
morphogenesis
trough
volcanism
Argentina
Neuquen
description The region is situated in the Neuquén Cordillera at 38° 30'S latitud close to the international border. Geomorphic and structural features are presented which indicated a glacial morphogenesis for the depression that contains the Moquehue- Aluminé lakes. Previous works have identified a large volcanic complex related to Plio-Quaternary volcanic activity located at the east of the present volcanic arc. In this sector various caldera depressions and associated domic bodies have been identified. From the nine proposed calderas only the Pino Hachado caldera has been studied in detail. The Meseta del Arco and Nacimientos del Aluminé are disregarded as calderas. The erosional genesis of the steep scarps previously interpreted as caldera margins is also identified with glacial erosion. Facies and types of the local Pleistocene glaciation, its extension, their flow direction and its quite probable diffluence (Paso del Arco) through coeval glaciers situated north of the international border are also analyzed. Local characteristics of volcanic and eolian morphogenic and the mass-wasting process are described. Brief comments about pre-glacial drainage and the previous proposal of Bío Bío-Aluminé trough on the region are added. Transversal topographic-geological profiles discard west of the Bío Bío-Aluminé Fault a structural unit related to tectonic depression of Bío Bío-Aluminé trough and the Nacimientos del Aluminé and Moquehue calderas.
format JOUR
author González Díaz, E.F.
di Tommaso, I.
author_facet González Díaz, E.F.
di Tommaso, I.
author_sort González Díaz, E.F.
title Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas
title_short Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas
title_full Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas
title_fullStr Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas
title_full_unstemmed Geomorphology of the Moquehue and Aluminé Lakes: Considerations about the Meseta del Arco and Nacimientos del Aluminé calderas
title_sort geomorphology of the moquehue and aluminé lakes: considerations about the meseta del arco and nacimientos del aluminé calderas
url http://hdl.handle.net/20.500.12110/paper_00044822_v66_n3_p438_GonzalezDiaz
work_keys_str_mv AT gonzalezdiazef geomorphologyofthemoquehueandaluminelakesconsiderationsaboutthemesetadelarcoandnacimientosdelaluminecalderas
AT ditommasoi geomorphologyofthemoquehueandaluminelakesconsiderationsaboutthemesetadelarcoandnacimientosdelaluminecalderas
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