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dc.contributor.author
Pingel, Heiko
dc.contributor.author
Alonso, Ricardo Narciso
dc.contributor.author
Mulch, Andreas
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Rohrmann, Alexander
dc.contributor.author
Sudo, Masafumi
dc.contributor.author
Strecker, R.
dc.date.available
2016-08-12T21:47:47Z
dc.date.issued
2014-08
dc.identifier.citation
Pingel, Heiko; Alonso, Ricardo Narciso; Mulch, Andreas; Rohrmann, Alexander; Sudo, Masafumi; et al.; Pliocene Orographic Barrier Uplift in the Southern Central Andes; Geological Society Of America; Geology; 42; 8; 8-2014; 691-694
dc.identifier.issn
0091-7613
dc.identifier.uri
http://hdl.handle.net/11336/7157
dc.description.abstract
Sedimentary basin fills along the windward flanks of orogenic plateaus are valuable archives of paleoenvironmental change with the potential to resolve the history of surface uplift and orographic barrier formation. The intermontane basins of the southern Central Andes contain thick successions of sedimentary material that are commonly interbedded with datable volcanic ashes. We relate variations in the hydrogen isotopic composition of hydrated volcanic glass (δDg) of Neogene to Quaternary fills in the semiarid intermontane Humahuaca Basin (Eastern Cordillera, northwest Argentina) to spatiotemporal changes in topography and associated orographic effects. δD values from volcanic glass in the basin strata (–117‰ to –98‰) show two main trends that accompany observed tectonosedimentary events in the study area. Between 6.0 and 3.5 Ma, δDg values decrease by ∼17‰; this is associated with surface uplift in the catchment area. After 3.5 Ma, δDg values show abrupt deuterium enrichment, which we associate with (1) the attainment of threshold elevations for blocking moisture transport in the basin-bounding ranges to the east, and (2) the onset of semiarid conditions in the basin. Such orographic barriers throughout the eastern flanks of the Central Andes have impeded moisture transport into the orogen interior; this has likely helped maintain aridity and internal drainage conditions on the adjacent Andean Plateau.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society Of America
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Pliocene
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Orographic
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Isotopes
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Andes
dc.subject.classification
Geoquímica y Geofísica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Pliocene Orographic Barrier Uplift in the Southern Central Andes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-08-11T13:57:19Z
dc.journal.volume
42
dc.journal.number
8
dc.journal.pagination
691-694
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Boulder
dc.description.fil
Fil: Pingel, Heiko. Universität Potsdam; Alemania
dc.description.fil
Fil: Alonso, Ricardo Narciso. Universidad Nacional de Salta; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta; Argentina
dc.description.fil
Fil: Mulch, Andreas. Goethe Universitat Frankfurt; Alemania. Biodiversität und Klima Forschungszentrum; Alemania
dc.description.fil
Fil: Rohrmann, Alexander. Universität Potsdam; Alemania
dc.description.fil
Fil: Sudo, Masafumi. Universität Potsdam; Alemania
dc.description.fil
Fil: Strecker, R.. Universität Potsdam; Alemania
dc.journal.title
Geology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://geology.gsapubs.org/content/early/2014/06/26/G35538.1.abstract
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1130/G35538.1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1130/G35538.1
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