Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models

Autores
Fennell, Lucas Martín; Hren, Michael; Brandon, Mark; Colwyn, David; Martos, Federico Exequiel; Lewis, Amelia; Folguera Telichevsky, Andres
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Andean basins contain a unique sedimentary record reflecting mountain building processes along thewestern margin of South America throughout its entire Meso-Cenozoic evolution (Horton, 2018). Inparticular, the retroarc foreland basins in west-central Argentina contain an archive of sedimentaccumulation rates, provenance, paleodrainage and deformation timings related to the growth of theSouthern Central Andes (27°-46°30?S; Ramos, 1999). However, this dataset has non-unique tectonicinterpretations, resulting in contrasting geodynamic scenarios. During the last decade, paleoaltimetrystudies using proxies to obtain the stable isotopic composition of paleoprecipitation have proved to be apowerful tool when assessing such contrasting scenarios, not only by reconstructing topography, butalso by adding a key element towards understanding changes in regional climate and biologicaldiversification (Mulch, 2016).The stable isotopic composition of precipitation reflects the degree of isotopic distillation during rainoutas an airmass moves across a landscape. Thus, materials that record this geochemical variable canprovide an indication of the present or past elevations along a moisture transport pathway. As volcanicashes are deposited on a landscape, they readily hydrate, providing a record of the isotopic compositionof ambient water over a timescale of 1-10 thousand years. Following hydration, water uptake ceasesand this initial signature is preserved, providing a long-term record of stable hydrogen isotopes (ID) ofpaleo-precipitation. Therefore, given that the activity of the Andean magmatic arc has resulted in anear-continuous production of felsic ashes for more than 65 million years, the stable isotope content ofhydrated volcanic glass from the Malargüe foreland basin (35°S) was extracted to analyze itstopographic evolution and compare it to the geological record.The ID of volcanic glasses preserved within strata of the Malargüe basin suggest high-standingtopography since at least 55 Ma, along with an increase in orographic fractionation during middleEocene to Oligocene times, followed by a decrease between the middle Miocene and the Pliocene.While the first event coincides with low accumulation rates during lacustrine and distal fluvial depositionin the basin, the second episode overlaps with high accumulation rates and proximal fluvial and alluvialsedimentation. These results support the hypothesis of a pre-Neogene orographic barrier and could bereflecting topographic changes associated with deep mantle processes that have been affecting theSouth American continent throughout most of the Cenozoic (Flament et al., 2015).Flament, N., Gurnis, M., Müller, R.D., Bower, D.J., and Husson, L., 2015. Influence of subduction history on South American topography. Earth andPlanetary Science Letters, 430, 9-18.Horton, B.K., 2018. Sedimentary record of Andean mountain building. Earth-Science Reviews, 178, 279-309.Mulch, A., 2016. Stable isotope paleoaltimetry and the evolution of landscapes and life. Earth and Planetary Science Letters, 433, 180-191.Ramos, V.A., 1999. Plate tectonic setting of the Andean Cordillera. Episodes, 22(3), 183-190.
Fil: Fennell, Lucas Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Hren, Michael. University of Connecticut; Estados Unidos
Fil: Brandon, Mark. University of Yale; Estados Unidos
Fil: Colwyn, David. State University of Colorado at Boulder; Estados Unidos
Fil: Martos, Federico Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Lewis, Amelia. Oberlin College; Estados Unidos
Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
8th International Symposium on Andean Geodynamics
Quito
Ecuador
Escuela Politécnica Nacional
Institut de Recherche pour le Développement
Materia
Tectonics
Paleoaltimetry
Deuterium
Malargüe
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:11336/154725

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network_name_str CONICET Digital (CONICET)
spelling Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic modelsFennell, Lucas MartínHren, MichaelBrandon, MarkColwyn, DavidMartos, Federico ExequielLewis, AmeliaFolguera Telichevsky, AndresTectonicsPaleoaltimetryDeuteriumMalargüehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Andean basins contain a unique sedimentary record reflecting mountain building processes along thewestern margin of South America throughout its entire Meso-Cenozoic evolution (Horton, 2018). Inparticular, the retroarc foreland basins in west-central Argentina contain an archive of sedimentaccumulation rates, provenance, paleodrainage and deformation timings related to the growth of theSouthern Central Andes (27°-46°30?S; Ramos, 1999). However, this dataset has non-unique tectonicinterpretations, resulting in contrasting geodynamic scenarios. During the last decade, paleoaltimetrystudies using proxies to obtain the stable isotopic composition of paleoprecipitation have proved to be apowerful tool when assessing such contrasting scenarios, not only by reconstructing topography, butalso by adding a key element towards understanding changes in regional climate and biologicaldiversification (Mulch, 2016).The stable isotopic composition of precipitation reflects the degree of isotopic distillation during rainoutas an airmass moves across a landscape. Thus, materials that record this geochemical variable canprovide an indication of the present or past elevations along a moisture transport pathway. As volcanicashes are deposited on a landscape, they readily hydrate, providing a record of the isotopic compositionof ambient water over a timescale of 1-10 thousand years. Following hydration, water uptake ceasesand this initial signature is preserved, providing a long-term record of stable hydrogen isotopes (ID) ofpaleo-precipitation. Therefore, given that the activity of the Andean magmatic arc has resulted in anear-continuous production of felsic ashes for more than 65 million years, the stable isotope content ofhydrated volcanic glass from the Malargüe foreland basin (35°S) was extracted to analyze itstopographic evolution and compare it to the geological record.The ID of volcanic glasses preserved within strata of the Malargüe basin suggest high-standingtopography since at least 55 Ma, along with an increase in orographic fractionation during middleEocene to Oligocene times, followed by a decrease between the middle Miocene and the Pliocene.While the first event coincides with low accumulation rates during lacustrine and distal fluvial depositionin the basin, the second episode overlaps with high accumulation rates and proximal fluvial and alluvialsedimentation. These results support the hypothesis of a pre-Neogene orographic barrier and could bereflecting topographic changes associated with deep mantle processes that have been affecting theSouth American continent throughout most of the Cenozoic (Flament et al., 2015).Flament, N., Gurnis, M., Müller, R.D., Bower, D.J., and Husson, L., 2015. Influence of subduction history on South American topography. Earth andPlanetary Science Letters, 430, 9-18.Horton, B.K., 2018. Sedimentary record of Andean mountain building. Earth-Science Reviews, 178, 279-309.Mulch, A., 2016. Stable isotope paleoaltimetry and the evolution of landscapes and life. Earth and Planetary Science Letters, 433, 180-191.Ramos, V.A., 1999. Plate tectonic setting of the Andean Cordillera. Episodes, 22(3), 183-190.Fil: Fennell, Lucas Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Hren, Michael. University of Connecticut; Estados UnidosFil: Brandon, Mark. University of Yale; Estados UnidosFil: Colwyn, David. State University of Colorado at Boulder; Estados UnidosFil: Martos, Federico Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Lewis, Amelia. Oberlin College; Estados UnidosFil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina8th International Symposium on Andean GeodynamicsQuitoEcuadorEscuela Politécnica NacionalInstitut de Recherche pour le DéveloppementInternational Society for Animal Genetics2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/154725Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.igepn.edu.ec/8isag-abstractsinfo:eu-repo/semantics/altIdentifier/url/https://www.igepn.edu.ec/8isag-abstracts/plenary-talksInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:20:09Zoai:ri.conicet.gov.ar:11336/154725instacron: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 10:20:10.205CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
title Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
spellingShingle Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
Fennell, Lucas Martín
Tectonics
Paleoaltimetry
Deuterium
Malargüe
title_short Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
title_full Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
title_fullStr Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
title_full_unstemmed Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
title_sort Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
dc.creator.none.fl_str_mv Fennell, Lucas Martín
Hren, Michael
Brandon, Mark
Colwyn, David
Martos, Federico Exequiel
Lewis, Amelia
Folguera Telichevsky, Andres
author Fennell, Lucas Martín
author_facet Fennell, Lucas Martín
Hren, Michael
Brandon, Mark
Colwyn, David
Martos, Federico Exequiel
Lewis, Amelia
Folguera Telichevsky, Andres
author_role author
author2 Hren, Michael
Brandon, Mark
Colwyn, David
Martos, Federico Exequiel
Lewis, Amelia
Folguera Telichevsky, Andres
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Tectonics
Paleoaltimetry
Deuterium
Malargüe
topic Tectonics
Paleoaltimetry
Deuterium
Malargüe
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Andean basins contain a unique sedimentary record reflecting mountain building processes along thewestern margin of South America throughout its entire Meso-Cenozoic evolution (Horton, 2018). Inparticular, the retroarc foreland basins in west-central Argentina contain an archive of sedimentaccumulation rates, provenance, paleodrainage and deformation timings related to the growth of theSouthern Central Andes (27°-46°30?S; Ramos, 1999). However, this dataset has non-unique tectonicinterpretations, resulting in contrasting geodynamic scenarios. During the last decade, paleoaltimetrystudies using proxies to obtain the stable isotopic composition of paleoprecipitation have proved to be apowerful tool when assessing such contrasting scenarios, not only by reconstructing topography, butalso by adding a key element towards understanding changes in regional climate and biologicaldiversification (Mulch, 2016).The stable isotopic composition of precipitation reflects the degree of isotopic distillation during rainoutas an airmass moves across a landscape. Thus, materials that record this geochemical variable canprovide an indication of the present or past elevations along a moisture transport pathway. As volcanicashes are deposited on a landscape, they readily hydrate, providing a record of the isotopic compositionof ambient water over a timescale of 1-10 thousand years. Following hydration, water uptake ceasesand this initial signature is preserved, providing a long-term record of stable hydrogen isotopes (ID) ofpaleo-precipitation. Therefore, given that the activity of the Andean magmatic arc has resulted in anear-continuous production of felsic ashes for more than 65 million years, the stable isotope content ofhydrated volcanic glass from the Malargüe foreland basin (35°S) was extracted to analyze itstopographic evolution and compare it to the geological record.The ID of volcanic glasses preserved within strata of the Malargüe basin suggest high-standingtopography since at least 55 Ma, along with an increase in orographic fractionation during middleEocene to Oligocene times, followed by a decrease between the middle Miocene and the Pliocene.While the first event coincides with low accumulation rates during lacustrine and distal fluvial depositionin the basin, the second episode overlaps with high accumulation rates and proximal fluvial and alluvialsedimentation. These results support the hypothesis of a pre-Neogene orographic barrier and could bereflecting topographic changes associated with deep mantle processes that have been affecting theSouth American continent throughout most of the Cenozoic (Flament et al., 2015).Flament, N., Gurnis, M., Müller, R.D., Bower, D.J., and Husson, L., 2015. Influence of subduction history on South American topography. Earth andPlanetary Science Letters, 430, 9-18.Horton, B.K., 2018. Sedimentary record of Andean mountain building. Earth-Science Reviews, 178, 279-309.Mulch, A., 2016. Stable isotope paleoaltimetry and the evolution of landscapes and life. Earth and Planetary Science Letters, 433, 180-191.Ramos, V.A., 1999. Plate tectonic setting of the Andean Cordillera. Episodes, 22(3), 183-190.
Fil: Fennell, Lucas Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Hren, Michael. University of Connecticut; Estados Unidos
Fil: Brandon, Mark. University of Yale; Estados Unidos
Fil: Colwyn, David. State University of Colorado at Boulder; Estados Unidos
Fil: Martos, Federico Exequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Lewis, Amelia. Oberlin College; Estados Unidos
Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
8th International Symposium on Andean Geodynamics
Quito
Ecuador
Escuela Politécnica Nacional
Institut de Recherche pour le Développement
description Andean basins contain a unique sedimentary record reflecting mountain building processes along thewestern margin of South America throughout its entire Meso-Cenozoic evolution (Horton, 2018). Inparticular, the retroarc foreland basins in west-central Argentina contain an archive of sedimentaccumulation rates, provenance, paleodrainage and deformation timings related to the growth of theSouthern Central Andes (27°-46°30?S; Ramos, 1999). However, this dataset has non-unique tectonicinterpretations, resulting in contrasting geodynamic scenarios. During the last decade, paleoaltimetrystudies using proxies to obtain the stable isotopic composition of paleoprecipitation have proved to be apowerful tool when assessing such contrasting scenarios, not only by reconstructing topography, butalso by adding a key element towards understanding changes in regional climate and biologicaldiversification (Mulch, 2016).The stable isotopic composition of precipitation reflects the degree of isotopic distillation during rainoutas an airmass moves across a landscape. Thus, materials that record this geochemical variable canprovide an indication of the present or past elevations along a moisture transport pathway. As volcanicashes are deposited on a landscape, they readily hydrate, providing a record of the isotopic compositionof ambient water over a timescale of 1-10 thousand years. Following hydration, water uptake ceasesand this initial signature is preserved, providing a long-term record of stable hydrogen isotopes (ID) ofpaleo-precipitation. Therefore, given that the activity of the Andean magmatic arc has resulted in anear-continuous production of felsic ashes for more than 65 million years, the stable isotope content ofhydrated volcanic glass from the Malargüe foreland basin (35°S) was extracted to analyze itstopographic evolution and compare it to the geological record.The ID of volcanic glasses preserved within strata of the Malargüe basin suggest high-standingtopography since at least 55 Ma, along with an increase in orographic fractionation during middleEocene to Oligocene times, followed by a decrease between the middle Miocene and the Pliocene.While the first event coincides with low accumulation rates during lacustrine and distal fluvial depositionin the basin, the second episode overlaps with high accumulation rates and proximal fluvial and alluvialsedimentation. These results support the hypothesis of a pre-Neogene orographic barrier and could bereflecting topographic changes associated with deep mantle processes that have been affecting theSouth American continent throughout most of the Cenozoic (Flament et al., 2015).Flament, N., Gurnis, M., Müller, R.D., Bower, D.J., and Husson, L., 2015. Influence of subduction history on South American topography. Earth andPlanetary Science Letters, 430, 9-18.Horton, B.K., 2018. Sedimentary record of Andean mountain building. Earth-Science Reviews, 178, 279-309.Mulch, A., 2016. Stable isotope paleoaltimetry and the evolution of landscapes and life. Earth and Planetary Science Letters, 433, 180-191.Ramos, V.A., 1999. Plate tectonic setting of the Andean Cordillera. Episodes, 22(3), 183-190.
publishDate 2019
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Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1
CONICET Digital
CONICET
url http://hdl.handle.net/11336/154725
identifier_str_mv Eocene to modern topographic evolution of an Andean retroarc foreland basin (35°S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1
CONICET Digital
CONICET
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publisher.none.fl_str_mv International Society for Animal Genetics
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