The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma.
New radiometric and magnetostratigraphic data from Quillagua and Calama basins (Atacama desert) indicate that the stratigraphic record over the last 10 Ma includes two hiatuses, lasting approximately 2 and 4 million years respectively. These sedimentary gaps are thought to represent prolonged period...
Published in: | Earth and Planetary Science Letters |
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ftubarcepubl:oai:diposit.ub.edu:2445/98248 2024-02-11T09:57:24+01:00 The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. Sáez, Alberto Cabrera, Lluís Garcés Crespo, Miguel Boogaard, Paul van den Jensen, A. Gimeno Torrente, Domingo 2012-11-15 23 p. application/pdf http://hdl.handle.net/2445/98248 eng eng Elsevier B.V. Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.epsl.2012.08.029 Earth and Planetary Science Letters, 2012, vol. 355-356, p. 32-38 Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) http://dx.doi.org/10.1016/j.epsl.2012.08.029 0012-821X http://hdl.handle.net/2445/98248 616960 (c) Elsevier B.V., 2012 info:eu-repo/semantics/openAccess Estratigrafia Neogen Atacama Desert d' (Xile) Stratigraphic geology Neogene Atacama Desert (Chile) info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 2012 ftubarcepubl https://doi.org/10.1016/j.epsl.2012.08.029 2024-01-24T00:59:35Z New radiometric and magnetostratigraphic data from Quillagua and Calama basins (Atacama desert) indicate that the stratigraphic record over the last 10 Ma includes two hiatuses, lasting approximately 2 and 4 million years respectively. These sedimentary gaps are thought to represent prolonged periods of hyperaridity in the region, with absence of sediment production and accumulation in the central depressions. Their remarkable synchrony with Antarctic and Patagonian glacial stages, Humboldt cold current enhancement and cold upwelling waters lead us to suggest long-term climate forcing. Higher frequency climate (orbital precession and eccentricity) forcing is thought to control the sequential arrangement of the lacustrine units deposited at times of lower aridity. Hyperaridity trends appear to be modulated by the activity of the South American Summer Monsoon, which drives precipitation along the high altitude areas to the east of Atacama. This precipitation increase combined with the eastward enlargement of the regional drainage during the late Pleistocene enabled water transfer from these high altitude areas to the low lying closed Quillagua basin and resulted in the deposition of the last widespread saline lacustrine deposits in this depression, before its drainage was open to the Pacific Ocean. Article in Journal/Newspaper Antarc* Antarctic Dipòsit Digital de la Universitat de Barcelona Antarctic Pacific Earth and Planetary Science Letters 355-356 32 38 |
institution |
Open Polar |
collection |
Dipòsit Digital de la Universitat de Barcelona |
op_collection_id |
ftubarcepubl |
language |
English |
topic |
Estratigrafia Neogen Atacama Desert d' (Xile) Stratigraphic geology Neogene Atacama Desert (Chile) |
spellingShingle |
Estratigrafia Neogen Atacama Desert d' (Xile) Stratigraphic geology Neogene Atacama Desert (Chile) Sáez, Alberto Cabrera, Lluís Garcés Crespo, Miguel Boogaard, Paul van den Jensen, A. Gimeno Torrente, Domingo The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. |
topic_facet |
Estratigrafia Neogen Atacama Desert d' (Xile) Stratigraphic geology Neogene Atacama Desert (Chile) |
description |
New radiometric and magnetostratigraphic data from Quillagua and Calama basins (Atacama desert) indicate that the stratigraphic record over the last 10 Ma includes two hiatuses, lasting approximately 2 and 4 million years respectively. These sedimentary gaps are thought to represent prolonged periods of hyperaridity in the region, with absence of sediment production and accumulation in the central depressions. Their remarkable synchrony with Antarctic and Patagonian glacial stages, Humboldt cold current enhancement and cold upwelling waters lead us to suggest long-term climate forcing. Higher frequency climate (orbital precession and eccentricity) forcing is thought to control the sequential arrangement of the lacustrine units deposited at times of lower aridity. Hyperaridity trends appear to be modulated by the activity of the South American Summer Monsoon, which drives precipitation along the high altitude areas to the east of Atacama. This precipitation increase combined with the eastward enlargement of the regional drainage during the late Pleistocene enabled water transfer from these high altitude areas to the low lying closed Quillagua basin and resulted in the deposition of the last widespread saline lacustrine deposits in this depression, before its drainage was open to the Pacific Ocean. |
format |
Article in Journal/Newspaper |
author |
Sáez, Alberto Cabrera, Lluís Garcés Crespo, Miguel Boogaard, Paul van den Jensen, A. Gimeno Torrente, Domingo |
author_facet |
Sáez, Alberto Cabrera, Lluís Garcés Crespo, Miguel Boogaard, Paul van den Jensen, A. Gimeno Torrente, Domingo |
author_sort |
Sáez, Alberto |
title |
The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. |
title_short |
The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. |
title_full |
The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. |
title_fullStr |
The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. |
title_full_unstemmed |
The stratigraphic record of changing hyperaridity in the Atacama desert over the last 10 Ma. |
title_sort |
stratigraphic record of changing hyperaridity in the atacama desert over the last 10 ma. |
publisher |
Elsevier B.V. |
publishDate |
2012 |
url |
http://hdl.handle.net/2445/98248 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.epsl.2012.08.029 Earth and Planetary Science Letters, 2012, vol. 355-356, p. 32-38 Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) http://dx.doi.org/10.1016/j.epsl.2012.08.029 0012-821X http://hdl.handle.net/2445/98248 616960 |
op_rights |
(c) Elsevier B.V., 2012 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2012.08.029 |
container_title |
Earth and Planetary Science Letters |
container_volume |
355-356 |
container_start_page |
32 |
op_container_end_page |
38 |
_version_ |
1790609698207039488 |