Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains

Autores
Garcia Morabito, Ezequiel; Zech, Roland; Zykina, Valentina S.; Christl, Marcus
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The mountains in southern Siberia (Altai, Sayan, Transbaikalia) wereglaciated repeatedly during the Quaternary, and the glacial sedimentsand landforms there are valuable archives for paleoenvironmental and climate reconstructions. However, studies focusing on glacialchronologies in these mountain ranges are still very scarce, and theextent and timing of glacier advances remains poorly constrained(e.g., Lehmkuhl et al. 2011; Agatova et al. 2014). We have used cosmogenic 10Be surface exposure dating toestablish a glacial chronology for the Chagan Uzun Valley in thesouthern Chuja Range in the Russian Altai. We targeted six morainecomplexes and sampled gneiss boulders and quartz cobbles. Exposureages vary widely on the individual moraines, making interpretationsin terms of depositions ages and timing of glacial advancesdifficult. Assuming negligible nuclide inheritance and interpretingthe oldest sample from a moraine as best available estimate, massiveglaciation occurred as early as ~84 ka. Subsequent, successively lessextensive glacial advances probably occurred at >40 ka (MIS4?),and 21-24 ka. Ourdata highlight the difficulty to apply surface exposure dating ofglacial landforms in cold, continental regions, most likely due tolong-lasting landform surface instability. Our results neverthelessadd additional evidence for an early local LGM in Siberia,significantly predating the global LGM.
Fil: Garcia Morabito, Ezequiel. 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: Zech, Roland. University of Bern; Suiza. Swiss Federal Institute of Technology Zurich; Suiza
Fil: Zykina, Valentina S.. No especifíca;
Fil: Christl, Marcus. Swiss Federal Institute of Technology Zurich; Suiza
Third Nordic Workshop on cosmogenic nuclide techniques
Estocolmo
Suecia
Stockholm University. Department of Physical Geography
Svensk Kärnbränslehantering
Materia
SURFACE EXPOSURE DATING
MORAINES
PALEOCLIMATE
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:11336/280227
Acceder
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spelling Surface exposure dating of moraines in the Chagan Uzun Valley, Altai MountainsGarcia Morabito, EzequielZech, RolandZykina, Valentina S.Christl, MarcusSURFACE EXPOSURE DATINGMORAINESPALEOCLIMATEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The mountains in southern Siberia (Altai, Sayan, Transbaikalia) wereglaciated repeatedly during the Quaternary, and the glacial sedimentsand landforms there are valuable archives for paleoenvironmental and climate reconstructions. However, studies focusing on glacialchronologies in these mountain ranges are still very scarce, and theextent and timing of glacier advances remains poorly constrained(e.g., Lehmkuhl et al. 2011; Agatova et al. 2014). We have used cosmogenic 10Be surface exposure dating toestablish a glacial chronology for the Chagan Uzun Valley in thesouthern Chuja Range in the Russian Altai. We targeted six morainecomplexes and sampled gneiss boulders and quartz cobbles. Exposureages vary widely on the individual moraines, making interpretationsin terms of depositions ages and timing of glacial advancesdifficult. Assuming negligible nuclide inheritance and interpretingthe oldest sample from a moraine as best available estimate, massiveglaciation occurred as early as ~84 ka. Subsequent, successively lessextensive glacial advances probably occurred at >40 ka (MIS4?),and 21-24 ka. Ourdata highlight the difficulty to apply surface exposure dating ofglacial landforms in cold, continental regions, most likely due tolong-lasting landform surface instability. Our results neverthelessadd additional evidence for an early local LGM in Siberia,significantly predating the global LGM.Fil: Garcia Morabito, Ezequiel. 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: Zech, Roland. University of Bern; Suiza. Swiss Federal Institute of Technology Zurich; SuizaFil: Zykina, Valentina S.. No especifíca;Fil: Christl, Marcus. Swiss Federal Institute of Technology Zurich; SuizaThird Nordic Workshop on cosmogenic nuclide techniquesEstocolmoSueciaStockholm University. Department of Physical GeographySvensk KärnbränslehanteringSvensk Kärnbränslehantering2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectWorkshopBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/280227Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains; Third Nordic Workshop on cosmogenic nuclide techniques; Estocolmo; Suecia; 2016; 32-33978-91-980362-7-5CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.skb.com/publication/2483898/Nordic+workshop.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T12:57:27Zoai:ri.conicet.gov.ar:11336/280227instacron: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:34982026-02-06 12:57:27.462CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
title Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
spellingShingle Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
Garcia Morabito, Ezequiel
SURFACE EXPOSURE DATING
MORAINES
PALEOCLIMATE
title_short Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
title_full Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
title_fullStr Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
title_full_unstemmed Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
title_sort Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains
dc.creator.none.fl_str_mv Garcia Morabito, Ezequiel
Zech, Roland
Zykina, Valentina S.
Christl, Marcus
author Garcia Morabito, Ezequiel
author_facet Garcia Morabito, Ezequiel
Zech, Roland
Zykina, Valentina S.
Christl, Marcus
author_role author
author2 Zech, Roland
Zykina, Valentina S.
Christl, Marcus
author2_role author
author
author
dc.subject.none.fl_str_mv SURFACE EXPOSURE DATING
MORAINES
PALEOCLIMATE
topic SURFACE EXPOSURE DATING
MORAINES
PALEOCLIMATE
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 mountains in southern Siberia (Altai, Sayan, Transbaikalia) wereglaciated repeatedly during the Quaternary, and the glacial sedimentsand landforms there are valuable archives for paleoenvironmental and climate reconstructions. However, studies focusing on glacialchronologies in these mountain ranges are still very scarce, and theextent and timing of glacier advances remains poorly constrained(e.g., Lehmkuhl et al. 2011; Agatova et al. 2014). We have used cosmogenic 10Be surface exposure dating toestablish a glacial chronology for the Chagan Uzun Valley in thesouthern Chuja Range in the Russian Altai. We targeted six morainecomplexes and sampled gneiss boulders and quartz cobbles. Exposureages vary widely on the individual moraines, making interpretationsin terms of depositions ages and timing of glacial advancesdifficult. Assuming negligible nuclide inheritance and interpretingthe oldest sample from a moraine as best available estimate, massiveglaciation occurred as early as ~84 ka. Subsequent, successively lessextensive glacial advances probably occurred at >40 ka (MIS4?),and 21-24 ka. Ourdata highlight the difficulty to apply surface exposure dating ofglacial landforms in cold, continental regions, most likely due tolong-lasting landform surface instability. Our results neverthelessadd additional evidence for an early local LGM in Siberia,significantly predating the global LGM.
Fil: Garcia Morabito, Ezequiel. 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: Zech, Roland. University of Bern; Suiza. Swiss Federal Institute of Technology Zurich; Suiza
Fil: Zykina, Valentina S.. No especifíca;
Fil: Christl, Marcus. Swiss Federal Institute of Technology Zurich; Suiza
Third Nordic Workshop on cosmogenic nuclide techniques
Estocolmo
Suecia
Stockholm University. Department of Physical Geography
Svensk Kärnbränslehantering
description The mountains in southern Siberia (Altai, Sayan, Transbaikalia) wereglaciated repeatedly during the Quaternary, and the glacial sedimentsand landforms there are valuable archives for paleoenvironmental and climate reconstructions. However, studies focusing on glacialchronologies in these mountain ranges are still very scarce, and theextent and timing of glacier advances remains poorly constrained(e.g., Lehmkuhl et al. 2011; Agatova et al. 2014). We have used cosmogenic 10Be surface exposure dating toestablish a glacial chronology for the Chagan Uzun Valley in thesouthern Chuja Range in the Russian Altai. We targeted six morainecomplexes and sampled gneiss boulders and quartz cobbles. Exposureages vary widely on the individual moraines, making interpretationsin terms of depositions ages and timing of glacial advancesdifficult. Assuming negligible nuclide inheritance and interpretingthe oldest sample from a moraine as best available estimate, massiveglaciation occurred as early as ~84 ka. Subsequent, successively lessextensive glacial advances probably occurred at >40 ka (MIS4?),and 21-24 ka. Ourdata highlight the difficulty to apply surface exposure dating ofglacial landforms in cold, continental regions, most likely due tolong-lasting landform surface instability. Our results neverthelessadd additional evidence for an early local LGM in Siberia,significantly predating the global LGM.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Workshop
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/280227
Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains; Third Nordic Workshop on cosmogenic nuclide techniques; Estocolmo; Suecia; 2016; 32-33
978-91-980362-7-5
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280227
identifier_str_mv Surface exposure dating of moraines in the Chagan Uzun Valley, Altai Mountains; Third Nordic Workshop on cosmogenic nuclide techniques; Estocolmo; Suecia; 2016; 32-33
978-91-980362-7-5
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://www.skb.com/publication/2483898/Nordic+workshop.pdf
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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
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Svensk Kärnbränslehantering
publisher.none.fl_str_mv Svensk Kärnbränslehantering
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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score 13.11174

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