Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau

The most remarkable feature of the Central Andes is the Altiplano-Puna plateau. This plateau is characterized by 3.5. km average elevation, approximately 70. km crustal thickness and very high heat flow. The upper mantle structure changes along strike below the plateau. The upper mantle below the Pu...

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Autores principales: Prezzi, C., Iglesia Llanos, M.P., Götze, H.-J., Schmidt, S.
Formato: JOUR
Materias:
Altiplano-Puna
Geodynamic topography
Thermal isostasy
Topography
Geodesy
Geodynamics
Thermal expansion
Crustal thickness
Geodynamic process
Regional variation
Thermal component
Thermal contributions
Upper mantle structure
Structural geology
crustal thickness
elevation
geodynamics
isostasy
lithosphere
mantle structure
plate tectonics
plateau
topographic effect
upper mantle
Altiplano
Puna
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319201_v237_n_p51_Prezzi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00319201_v237_n_p51_Prezzi2023-10-03T14:43:29Z Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau Prezzi, C. Iglesia Llanos, M.P. Götze, H.-J. Schmidt, S. Altiplano-Puna Geodynamic topography Thermal isostasy Topography Geodesy Geodynamics Thermal expansion Topography Altiplano-Puna Crustal thickness Geodynamic process Regional variation Thermal component Thermal contributions Thermal isostasy Upper mantle structure Structural geology crustal thickness elevation geodynamics isostasy lithosphere mantle structure plate tectonics plateau topographic effect upper mantle Altiplano Puna The most remarkable feature of the Central Andes is the Altiplano-Puna plateau. This plateau is characterized by 3.5. km average elevation, approximately 70. km crustal thickness and very high heat flow. The upper mantle structure changes along strike below the plateau. The upper mantle below the Puna becomes hotter, and the lithosphere becomes thinner and weaker. These features suggest that thermal isostasy could play a role in the compensation of the Altiplano-Puna. Thermal isostasy is the geodynamic process whereby regional variations in the lithospheric thermal regime cause changes in elevation. Elevation changes result from variations in rock density in response to thermal expansion. The aim of this study is to estimate the thermal and geodynamic contributions to the elevation. While the thermal component of the Altiplano elevation would be of 1. km, the thermal contribution to the southern Puna elevation would be of 1.5. km. However, in the case of the southern Puna a portion of the actual topography (~20%) cannot be explained considering only compositional and thermal effects, suggesting additional geodynamical support. The obtained results suggest that the thermal state of the lithosphere would play a significant role in the elevation of the Central Andes, and may be responsible of some of the geological differences displayed by the Altiplano and the Puna. © 2014 Elsevier B.V. Fil:Prezzi, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Iglesia Llanos, M.P. 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_00319201_v237_n_p51_Prezzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Altiplano-Puna
Geodynamic topography
Thermal isostasy
Topography
Geodesy
Geodynamics
Thermal expansion
Topography
Altiplano-Puna
Crustal thickness
Geodynamic process
Regional variation
Thermal component
Thermal contributions
Thermal isostasy
Upper mantle structure
Structural geology
crustal thickness
elevation
geodynamics
isostasy
lithosphere
mantle structure
plate tectonics
plateau
topographic effect
upper mantle
Altiplano
Puna
spellingShingle Altiplano-Puna
Geodynamic topography
Thermal isostasy
Topography
Geodesy
Geodynamics
Thermal expansion
Topography
Altiplano-Puna
Crustal thickness
Geodynamic process
Regional variation
Thermal component
Thermal contributions
Thermal isostasy
Upper mantle structure
Structural geology
crustal thickness
elevation
geodynamics
isostasy
lithosphere
mantle structure
plate tectonics
plateau
topographic effect
upper mantle
Altiplano
Puna
Prezzi, C.
Iglesia Llanos, M.P.
Götze, H.-J.
Schmidt, S.
Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau
topic_facet Altiplano-Puna
Geodynamic topography
Thermal isostasy
Topography
Geodesy
Geodynamics
Thermal expansion
Topography
Altiplano-Puna
Crustal thickness
Geodynamic process
Regional variation
Thermal component
Thermal contributions
Thermal isostasy
Upper mantle structure
Structural geology
crustal thickness
elevation
geodynamics
isostasy
lithosphere
mantle structure
plate tectonics
plateau
topographic effect
upper mantle
Altiplano
Puna
description The most remarkable feature of the Central Andes is the Altiplano-Puna plateau. This plateau is characterized by 3.5. km average elevation, approximately 70. km crustal thickness and very high heat flow. The upper mantle structure changes along strike below the plateau. The upper mantle below the Puna becomes hotter, and the lithosphere becomes thinner and weaker. These features suggest that thermal isostasy could play a role in the compensation of the Altiplano-Puna. Thermal isostasy is the geodynamic process whereby regional variations in the lithospheric thermal regime cause changes in elevation. Elevation changes result from variations in rock density in response to thermal expansion. The aim of this study is to estimate the thermal and geodynamic contributions to the elevation. While the thermal component of the Altiplano elevation would be of 1. km, the thermal contribution to the southern Puna elevation would be of 1.5. km. However, in the case of the southern Puna a portion of the actual topography (~20%) cannot be explained considering only compositional and thermal effects, suggesting additional geodynamical support. The obtained results suggest that the thermal state of the lithosphere would play a significant role in the elevation of the Central Andes, and may be responsible of some of the geological differences displayed by the Altiplano and the Puna. © 2014 Elsevier B.V.
format JOUR
author Prezzi, C.
Iglesia Llanos, M.P.
Götze, H.-J.
Schmidt, S.
author_facet Prezzi, C.
Iglesia Llanos, M.P.
Götze, H.-J.
Schmidt, S.
author_sort Prezzi, C.
title Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau
title_short Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau
title_full Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau
title_fullStr Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau
title_full_unstemmed Thermal and geodynamic contributions to the elevation of the Altiplano-Puna plateau
title_sort thermal and geodynamic contributions to the elevation of the altiplano-puna plateau
url http://hdl.handle.net/20.500.12110/paper_00319201_v237_n_p51_Prezzi
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AT iglesiallanosmp thermalandgeodynamiccontributionstotheelevationofthealtiplanopunaplateau
AT gotzehj thermalandgeodynamiccontributionstotheelevationofthealtiplanopunaplateau
AT schmidts thermalandgeodynamiccontributionstotheelevationofthealtiplanopunaplateau
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