Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes

Autores
López Steinmetz, Romina Lucrecia; López Steinmetz, Lorena Cecilia
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The impressive eolian landscape of the Andean Plateau results from a combination of multiple factors controlling the formation of fossil and modern morphologies. We investigated fossil and modern eolian dunes set along the eastern border of the Plateau at ca. 22–238 S. We applied sedimentology, statistics, and physical eolian models of sand transport in order to infer the characteristics of the eolian system during the past. Modern dunes are composed of medium sands, including more than 80% of quartz grains complemented by lithic fractions sourced predominantly from metasedimentary units, and a mean bulk-sediment density of 1611 kg/m3. Fossil dunes are most likely Miocene in age, and are texturally similar to modern dunes. However, fossil sands are characterized by a mean density of 1209 kg/ m3, which results from the prevalence of a lightweight, volcanic lithotype. Similar to the present day, the Miocene eolian system was characterized by wind from the northwest. Dune-building processes would have been associated with a mean wind regime of about 9% slower during the Miocene compared to modern conditions. Additionally, two main mechanisms of sediment supply were identified in the eolian system: a local, and long-term mechanism of sediment deflation over dry surfaces and stream channels; and a temporary, fossil process that fed the Miocene eolian system with volcanic-related sediments sourced from west of the basin.
Fil: López Steinmetz, Romina Lucrecia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: López Steinmetz, Lorena Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Jujuy. Universidad Nacional de Jujuy. Centro de Investigaciones y Transferencia de Jujuy; Argentina
Materia
paleo climate
aridity
wind
Miocene
Central Andes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/91890
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/91890
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunesLópez Steinmetz, Romina LucreciaLópez Steinmetz, Lorena Ceciliapaleo climateariditywindMioceneCentral Andeshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The impressive eolian landscape of the Andean Plateau results from a combination of multiple factors controlling the formation of fossil and modern morphologies. We investigated fossil and modern eolian dunes set along the eastern border of the Plateau at ca. 22–238 S. We applied sedimentology, statistics, and physical eolian models of sand transport in order to infer the characteristics of the eolian system during the past. Modern dunes are composed of medium sands, including more than 80% of quartz grains complemented by lithic fractions sourced predominantly from metasedimentary units, and a mean bulk-sediment density of 1611 kg/m3. Fossil dunes are most likely Miocene in age, and are texturally similar to modern dunes. However, fossil sands are characterized by a mean density of 1209 kg/ m3, which results from the prevalence of a lightweight, volcanic lithotype. Similar to the present day, the Miocene eolian system was characterized by wind from the northwest. Dune-building processes would have been associated with a mean wind regime of about 9% slower during the Miocene compared to modern conditions. Additionally, two main mechanisms of sediment supply were identified in the eolian system: a local, and long-term mechanism of sediment deflation over dry surfaces and stream channels; and a temporary, fossil process that fed the Miocene eolian system with volcanic-related sediments sourced from west of the basin.Fil: López Steinmetz, Romina Lucrecia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: López Steinmetz, Lorena Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Jujuy. Universidad Nacional de Jujuy. Centro de Investigaciones y Transferencia de Jujuy; ArgentinaSociety for Sedimentary Geology2018-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/91890López Steinmetz, Romina Lucrecia; López Steinmetz, Lorena Cecilia; Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes; Society for Sedimentary Geology; Journal of Sedimentary Research - (Print); 88; 1; 1-2018; 129-1471527-1404CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/sepm/jsedres/article/88/1/129/527175/Paleoeolian-Dynamics-in-the-Andean-Plateauinfo:eu-repo/semantics/altIdentifier/doi/10.2110/jsr.2018.4info:eu-repo/semantics/altIdentifier/url/https://watermark.silverchair.com/i1527-1404-88-1-129.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAoUwggKBBgkqhkiG9w0BBwagggJyMIICbgIBADCCAmcGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMp6rCGI2A396-HffBAgEQgIICONGVcK4cqM3rkJejhee5Vzf054m8NrCxnypyCss2Rc6vyxvISIrb6aSAGjM4dlFm3v9xlPz5qYle3kopwT9rsBdo15n6xBLlT-d8G5A0Gpv9OCV6hbnNv1RPtZFtu8w5G-C0bsBWlgPjHBbSZ-J0TpxR0LH6PQ4ReGcUUqVZ3B7v0BoUOTIJOupogtP9MfJvhv4-Qb27TYdHCAXsrT61Obb-sqyFEi2Wue3oKTbcXDi_NQ8FR9BiVrKvUMGEfj3G1-lrcAT-3SEK0zy4T6cVPEcQpVTMIxE8IKlQHeWBDTsv6nixjQR74k_lk2RJX6VGHD9flWPucdI9ZIGu7xqG3m2SUC4t41HtJDVe0S9VwSau37ytPJqqdIPvpb09vlSZRq-OjaCwqPB2bebq1YjJ3ffXv5Ga28LbnvAlnfUWK9sFc8Jo79acLPJVJmwQY9aDDC41NRxwdsvs3hrCmph-SrkB9cC4FaKXybvX8WXpRIgeIOkoOWpMlG8hKQW864WIyuMm_LbvVtBGsOQmete99DcUvSYl37VjZtStSPvY7R-aWNGN7fV5LjLXro1WVxolZ0h7G8zUhoQTILER8KVnv_hQrL_u7-ke-jowwWy864rgsIPJ-Y-gJFR1FPoKoUbcCxBR_FLtJAK1Lg8_gjtC0NjjnLWOHKwgF8IYtKD3biiqOza0HnP2rCl_KOmKYqt50wY43td8oQene0pQaqXWdEuKONgs6roG0mbpDeyAPTkDmvV3ra4cArQinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:56:28Zoai:ri.conicet.gov.ar:11336/91890instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:56:28.797CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
title Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
spellingShingle Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
López Steinmetz, Romina Lucrecia
paleo climate
aridity
wind
Miocene
Central Andes
title_short Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
title_full Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
title_fullStr Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
title_full_unstemmed Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
title_sort Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes
dc.creator.none.fl_str_mv López Steinmetz, Romina Lucrecia
López Steinmetz, Lorena Cecilia
author López Steinmetz, Romina Lucrecia
author_facet López Steinmetz, Romina Lucrecia
López Steinmetz, Lorena Cecilia
author_role author
author2 López Steinmetz, Lorena Cecilia
author2_role author
dc.subject.none.fl_str_mv paleo climate
aridity
wind
Miocene
Central Andes
topic paleo climate
aridity
wind
Miocene
Central Andes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The impressive eolian landscape of the Andean Plateau results from a combination of multiple factors controlling the formation of fossil and modern morphologies. We investigated fossil and modern eolian dunes set along the eastern border of the Plateau at ca. 22–238 S. We applied sedimentology, statistics, and physical eolian models of sand transport in order to infer the characteristics of the eolian system during the past. Modern dunes are composed of medium sands, including more than 80% of quartz grains complemented by lithic fractions sourced predominantly from metasedimentary units, and a mean bulk-sediment density of 1611 kg/m3. Fossil dunes are most likely Miocene in age, and are texturally similar to modern dunes. However, fossil sands are characterized by a mean density of 1209 kg/ m3, which results from the prevalence of a lightweight, volcanic lithotype. Similar to the present day, the Miocene eolian system was characterized by wind from the northwest. Dune-building processes would have been associated with a mean wind regime of about 9% slower during the Miocene compared to modern conditions. Additionally, two main mechanisms of sediment supply were identified in the eolian system: a local, and long-term mechanism of sediment deflation over dry surfaces and stream channels; and a temporary, fossil process that fed the Miocene eolian system with volcanic-related sediments sourced from west of the basin.
Fil: López Steinmetz, Romina Lucrecia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: López Steinmetz, Lorena Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Jujuy. Universidad Nacional de Jujuy. Centro de Investigaciones y Transferencia de Jujuy; Argentina
description The impressive eolian landscape of the Andean Plateau results from a combination of multiple factors controlling the formation of fossil and modern morphologies. We investigated fossil and modern eolian dunes set along the eastern border of the Plateau at ca. 22–238 S. We applied sedimentology, statistics, and physical eolian models of sand transport in order to infer the characteristics of the eolian system during the past. Modern dunes are composed of medium sands, including more than 80% of quartz grains complemented by lithic fractions sourced predominantly from metasedimentary units, and a mean bulk-sediment density of 1611 kg/m3. Fossil dunes are most likely Miocene in age, and are texturally similar to modern dunes. However, fossil sands are characterized by a mean density of 1209 kg/ m3, which results from the prevalence of a lightweight, volcanic lithotype. Similar to the present day, the Miocene eolian system was characterized by wind from the northwest. Dune-building processes would have been associated with a mean wind regime of about 9% slower during the Miocene compared to modern conditions. Additionally, two main mechanisms of sediment supply were identified in the eolian system: a local, and long-term mechanism of sediment deflation over dry surfaces and stream channels; and a temporary, fossil process that fed the Miocene eolian system with volcanic-related sediments sourced from west of the basin.
publishDate 2018
dc.date.none.fl_str_mv 2018-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/91890
López Steinmetz, Romina Lucrecia; López Steinmetz, Lorena Cecilia; Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes; Society for Sedimentary Geology; Journal of Sedimentary Research - (Print); 88; 1; 1-2018; 129-147
1527-1404
CONICET Digital
CONICET
url http://hdl.handle.net/11336/91890
identifier_str_mv López Steinmetz, Romina Lucrecia; López Steinmetz, Lorena Cecilia; Paleo-eolian dynamics in the andean plateau: Inferences from sedimentology of fossil and modern dunes; Society for Sedimentary Geology; Journal of Sedimentary Research - (Print); 88; 1; 1-2018; 129-147
1527-1404
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/sepm/jsedres/article/88/1/129/527175/Paleoeolian-Dynamics-in-the-Andean-Plateau
info:eu-repo/semantics/altIdentifier/doi/10.2110/jsr.2018.4
info:eu-repo/semantics/altIdentifier/url/https://watermark.silverchair.com/i1527-1404-88-1-129.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAoUwggKBBgkqhkiG9w0BBwagggJyMIICbgIBADCCAmcGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMp6rCGI2A396-HffBAgEQgIICONGVcK4cqM3rkJejhee5Vzf054m8NrCxnypyCss2Rc6vyxvISIrb6aSAGjM4dlFm3v9xlPz5qYle3kopwT9rsBdo15n6xBLlT-d8G5A0Gpv9OCV6hbnNv1RPtZFtu8w5G-C0bsBWlgPjHBbSZ-J0TpxR0LH6PQ4ReGcUUqVZ3B7v0BoUOTIJOupogtP9MfJvhv4-Qb27TYdHCAXsrT61Obb-sqyFEi2Wue3oKTbcXDi_NQ8FR9BiVrKvUMGEfj3G1-lrcAT-3SEK0zy4T6cVPEcQpVTMIxE8IKlQHeWBDTsv6nixjQR74k_lk2RJX6VGHD9flWPucdI9ZIGu7xqG3m2SUC4t41HtJDVe0S9VwSau37ytPJqqdIPvpb09vlSZRq-OjaCwqPB2bebq1YjJ3ffXv5Ga28LbnvAlnfUWK9sFc8Jo79acLPJVJmwQY9aDDC41NRxwdsvs3hrCmph-SrkB9cC4FaKXybvX8WXpRIgeIOkoOWpMlG8hKQW864WIyuMm_LbvVtBGsOQmete99DcUvSYl37VjZtStSPvY7R-aWNGN7fV5LjLXro1WVxolZ0h7G8zUhoQTILER8KVnv_hQrL_u7-ke-jowwWy864rgsIPJ-Y-gJFR1FPoKoUbcCxBR_FLtJAK1Lg8_gjtC0NjjnLWOHKwgF8IYtKD3biiqOza0HnP2rCl_KOmKYqt50wY43td8oQene0pQaqXWdEuKONgs6roG0mbpDeyAPTkDmvV3ra4cArQ
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Society for Sedimentary Geology
publisher.none.fl_str_mv Society for Sedimentary Geology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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