Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin

Autores
Repasch, Marisa; Scheingross, Joel S.; Cook, Kristen L.; Sachse, Dirk; Dosch, Sophia; Orfeo, Oscar; Hovius, Niels
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Tectonics exerts a strong control over the morphology of Earth´s surface that is apparent in active mountain belts. In lowland areas, subtle processes like lithospheric flexure and isostatic rebound can impact Earth surface dynamics, hydrologic connectivity, and topography, suggesting that geomorphic and hydrologic analyses can shed light on underlying lithospheric properties. Here we examine the effect of lithospheric flexure on the geomorphology, hydrology, and river water chemistry of the Rio Bermejo fluvial system in the east Andean foreland basin of northern Argentina. Results show that proximal to the mountain front, foredeep basin subsidence causes sedimentation along a braided channel belt that is superelevated relative to the surrounding flood basin. During floods, water flows from the superelevated channel into the groundwater reservoir, causing a net loss of discharge with distance downstream. Further downstream, forebulge uplift forces channel narrowing, high lateral migration rates, and incision up to 13 m into older river deposits. This incision locally allows groundwater flow into the river, causing a ∼20% increase in river solute load. Groundwater emerges from the forebulge into the backbulge, predominantly as spring-fed channels. Here, channel migration rates decrease, suggesting a switch from net uplift to subsidence that reduces the depth to the groundwater table. This analysis shows that subtle lithospheric flexure can have significant effects on river channel morphology that determine hydrologic flow paths, and ultimately influence geochemical and ecological patterns. We suggest that these effects may elucidate lithospheric properties that are otherwise inferred from bulk geophysical observations.
Fil: Repasch, Marisa. State University of Colorado at Boulder; Estados Unidos
Fil: Scheingross, Joel S.. University of Nevada; Estados Unidos
Fil: Cook, Kristen L.. Universite Grenoble Alpes; Francia
Fil: Sachse, Dirk. German Research Centre for Geosciences; Alemania
Fil: Dosch, Sophia. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Hovius, Niels. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
Materia
AQUEOUS GEOCHEMISTRY
FORELAND BASINS
GEOMORPHOLOGY
HYDROGEOLOGY
LITHOSPHERE DYNAMICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/229881

id CONICETDig_77ccda2444beb24e17f4cdc0bfcd448c
oai_identifier_str oai:ri.conicet.gov.ar:11336/229881
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland BasinRepasch, MarisaScheingross, Joel S.Cook, Kristen L.Sachse, DirkDosch, SophiaOrfeo, OscarHovius, NielsAQUEOUS GEOCHEMISTRYFORELAND BASINSGEOMORPHOLOGYHYDROGEOLOGYLITHOSPHERE DYNAMICShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Tectonics exerts a strong control over the morphology of Earth´s surface that is apparent in active mountain belts. In lowland areas, subtle processes like lithospheric flexure and isostatic rebound can impact Earth surface dynamics, hydrologic connectivity, and topography, suggesting that geomorphic and hydrologic analyses can shed light on underlying lithospheric properties. Here we examine the effect of lithospheric flexure on the geomorphology, hydrology, and river water chemistry of the Rio Bermejo fluvial system in the east Andean foreland basin of northern Argentina. Results show that proximal to the mountain front, foredeep basin subsidence causes sedimentation along a braided channel belt that is superelevated relative to the surrounding flood basin. During floods, water flows from the superelevated channel into the groundwater reservoir, causing a net loss of discharge with distance downstream. Further downstream, forebulge uplift forces channel narrowing, high lateral migration rates, and incision up to 13 m into older river deposits. This incision locally allows groundwater flow into the river, causing a ∼20% increase in river solute load. Groundwater emerges from the forebulge into the backbulge, predominantly as spring-fed channels. Here, channel migration rates decrease, suggesting a switch from net uplift to subsidence that reduces the depth to the groundwater table. This analysis shows that subtle lithospheric flexure can have significant effects on river channel morphology that determine hydrologic flow paths, and ultimately influence geochemical and ecological patterns. We suggest that these effects may elucidate lithospheric properties that are otherwise inferred from bulk geophysical observations.Fil: Repasch, Marisa. State University of Colorado at Boulder; Estados UnidosFil: Scheingross, Joel S.. University of Nevada; Estados UnidosFil: Cook, Kristen L.. Universite Grenoble Alpes; FranciaFil: Sachse, Dirk. German Research Centre for Geosciences; AlemaniaFil: Dosch, Sophia. Universitat Potsdam; Alemania. German Research Centre for Geosciences; AlemaniaFil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; ArgentinaFil: Hovius, Niels. Universitat Potsdam; Alemania. German Research Centre for Geosciences; AlemaniaJohn Wiley & Sons2023-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/229881Repasch, Marisa; Scheingross, Joel S.; Cook, Kristen L.; Sachse, Dirk; Dosch, Sophia; et al.; Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin; John Wiley & Sons; AGU Advances; 4; 5; 10-2023; 1-182576-604XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1029/2023AV000924info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:01:46Zoai:ri.conicet.gov.ar:11336/229881instacron: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:34982025-09-29 10:01:47.188CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
title Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
spellingShingle Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
Repasch, Marisa
AQUEOUS GEOCHEMISTRY
FORELAND BASINS
GEOMORPHOLOGY
HYDROGEOLOGY
LITHOSPHERE DYNAMICS
title_short Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
title_full Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
title_fullStr Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
title_full_unstemmed Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
title_sort Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
dc.creator.none.fl_str_mv Repasch, Marisa
Scheingross, Joel S.
Cook, Kristen L.
Sachse, Dirk
Dosch, Sophia
Orfeo, Oscar
Hovius, Niels
author Repasch, Marisa
author_facet Repasch, Marisa
Scheingross, Joel S.
Cook, Kristen L.
Sachse, Dirk
Dosch, Sophia
Orfeo, Oscar
Hovius, Niels
author_role author
author2 Scheingross, Joel S.
Cook, Kristen L.
Sachse, Dirk
Dosch, Sophia
Orfeo, Oscar
Hovius, Niels
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv AQUEOUS GEOCHEMISTRY
FORELAND BASINS
GEOMORPHOLOGY
HYDROGEOLOGY
LITHOSPHERE DYNAMICS
topic AQUEOUS GEOCHEMISTRY
FORELAND BASINS
GEOMORPHOLOGY
HYDROGEOLOGY
LITHOSPHERE DYNAMICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Tectonics exerts a strong control over the morphology of Earth´s surface that is apparent in active mountain belts. In lowland areas, subtle processes like lithospheric flexure and isostatic rebound can impact Earth surface dynamics, hydrologic connectivity, and topography, suggesting that geomorphic and hydrologic analyses can shed light on underlying lithospheric properties. Here we examine the effect of lithospheric flexure on the geomorphology, hydrology, and river water chemistry of the Rio Bermejo fluvial system in the east Andean foreland basin of northern Argentina. Results show that proximal to the mountain front, foredeep basin subsidence causes sedimentation along a braided channel belt that is superelevated relative to the surrounding flood basin. During floods, water flows from the superelevated channel into the groundwater reservoir, causing a net loss of discharge with distance downstream. Further downstream, forebulge uplift forces channel narrowing, high lateral migration rates, and incision up to 13 m into older river deposits. This incision locally allows groundwater flow into the river, causing a ∼20% increase in river solute load. Groundwater emerges from the forebulge into the backbulge, predominantly as spring-fed channels. Here, channel migration rates decrease, suggesting a switch from net uplift to subsidence that reduces the depth to the groundwater table. This analysis shows that subtle lithospheric flexure can have significant effects on river channel morphology that determine hydrologic flow paths, and ultimately influence geochemical and ecological patterns. We suggest that these effects may elucidate lithospheric properties that are otherwise inferred from bulk geophysical observations.
Fil: Repasch, Marisa. State University of Colorado at Boulder; Estados Unidos
Fil: Scheingross, Joel S.. University of Nevada; Estados Unidos
Fil: Cook, Kristen L.. Universite Grenoble Alpes; Francia
Fil: Sachse, Dirk. German Research Centre for Geosciences; Alemania
Fil: Dosch, Sophia. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Hovius, Niels. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
description Tectonics exerts a strong control over the morphology of Earth´s surface that is apparent in active mountain belts. In lowland areas, subtle processes like lithospheric flexure and isostatic rebound can impact Earth surface dynamics, hydrologic connectivity, and topography, suggesting that geomorphic and hydrologic analyses can shed light on underlying lithospheric properties. Here we examine the effect of lithospheric flexure on the geomorphology, hydrology, and river water chemistry of the Rio Bermejo fluvial system in the east Andean foreland basin of northern Argentina. Results show that proximal to the mountain front, foredeep basin subsidence causes sedimentation along a braided channel belt that is superelevated relative to the surrounding flood basin. During floods, water flows from the superelevated channel into the groundwater reservoir, causing a net loss of discharge with distance downstream. Further downstream, forebulge uplift forces channel narrowing, high lateral migration rates, and incision up to 13 m into older river deposits. This incision locally allows groundwater flow into the river, causing a ∼20% increase in river solute load. Groundwater emerges from the forebulge into the backbulge, predominantly as spring-fed channels. Here, channel migration rates decrease, suggesting a switch from net uplift to subsidence that reduces the depth to the groundwater table. This analysis shows that subtle lithospheric flexure can have significant effects on river channel morphology that determine hydrologic flow paths, and ultimately influence geochemical and ecological patterns. We suggest that these effects may elucidate lithospheric properties that are otherwise inferred from bulk geophysical observations.
publishDate 2023
dc.date.none.fl_str_mv 2023-10
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/11336/229881
Repasch, Marisa; Scheingross, Joel S.; Cook, Kristen L.; Sachse, Dirk; Dosch, Sophia; et al.; Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin; John Wiley & Sons; AGU Advances; 4; 5; 10-2023; 1-18
2576-604X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/229881
identifier_str_mv Repasch, Marisa; Scheingross, Joel S.; Cook, Kristen L.; Sachse, Dirk; Dosch, Sophia; et al.; Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin; John Wiley & Sons; AGU Advances; 4; 5; 10-2023; 1-18
2576-604X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1029/2023AV000924
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
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
_version_ 1844613815395680256
score 13.070432