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dc.contributor.author
Pingel, Heiko
dc.contributor.author
Mulch, Andreas
dc.contributor.author
Alonso, Ricardo Narciso
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Cottle, John
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Hynek, Scott A.
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Poletti, Jacob
dc.contributor.author
Rohrmann, Alexander
dc.contributor.author
Schmitt, Axel K.
dc.contributor.author
Stockli, Daniel F.
dc.contributor.author
Strecker, Manfred R.
dc.date.available
2018-09-03T16:03:38Z
dc.date.issued
2016-04
dc.identifier.citation
Pingel, Heiko; Mulch, Andreas; Alonso, Ricardo Narciso; Cottle, John; Hynek, Scott A.; et al.; Surface uplift and convective rainfall along the southern Central Andes (Angastaco Basin, NW Argentina); Elsevier Science; Earth and Planetary Science Letters; 440; 4-2016; 33-42
dc.identifier.issn
0012-821X
dc.identifier.uri
http://hdl.handle.net/11336/58062
dc.description.abstract
Stable-isotopic and sedimentary records from the orogenic Puna Plateau of NW Argentina and adjacent intermontane basins to the east furnish a unique late Cenozoic record of range uplift and ensuing paleoenvironmental change in the south-central Andes. Today, focused precipitation in this region occurs along the eastern, windward flanks of the Eastern Cordillera and Sierras Pampeanas ranges, while the orogen interior constitutes high-elevation regions with increasingly arid conditions in a westward direction. As in many mountain belts, such hydrologic and topographic gradients are commonly mirrored by a systematic relationship between the oxygen and hydrogen stable isotope ratios of meteoric water and elevation. The glass fraction of isotopically datable volcanic ash intercalated in sedimentary sequences constitutes an environmental proxy that retains a signal of the hydrogen-isotopic composition of ancient precipitation. This isotopic composition thus helps to elucidate the combined climatic and tectonic processes associated with topographic growth, which ultimately controls the spatial patterns of precipitation in mountain belts. However, between 25.5 and 27°S present-day river-based hydrogen-isotope lapse rates are very low, possibly due to deep-convective seasonal storms that dominate runoff. If not accounted for, the effects of such conditions on moisture availability in the past may lead to misinterpretations of proxy-records of rainfall. Here, we present hydrogen-isotope data of volcanic glass (δDg), extracted from 34 volcanic ash layers in different sedimentary basins of the Eastern Cordillera and the Sierras Pampeanas. Combined with previously published δDg records and our refined U-Pb and (U-Th)/He zircon geochronology on 17 tuff samples, we demonstrate hydrogen-isotope variations associated with paleoenvironmental change in the Angastaco Basin, which evolved from a contiguous foreland to a fault-bounded intermontane basin during the late Mio-Pliocene. We unravel the environmental impact of Mio-Pliocene topographic growth and associated orographic effects on long-term hydrogen-isotope records of rainfall in the south-central Andes, and potentially identify temporal variations in regional isotopic lapse rates that may also apply to other regions with similar topographic boundary conditions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Convective Rainfall
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Hydrogen Stable Isotopes
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Nw-Argentine Andes
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Orographic Barrier Uplift
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Paleoaltimetry
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Volcanic Glass
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Surface uplift and convective rainfall along the southern Central Andes (Angastaco Basin, NW Argentina)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-27T19:18:18Z
dc.journal.volume
440
dc.journal.pagination
33-42
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Pingel, Heiko. Universitat Potsdam; Alemania
dc.description.fil
Fil: Mulch, Andreas. Goethe Universitat Frankfurt; Alemania
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Fil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta; Argentina
dc.description.fil
Fil: Cottle, John. University of California; Estados Unidos
dc.description.fil
Fil: Hynek, Scott A.. Penn State University; Estados Unidos
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Fil: Poletti, Jacob. University of California; Estados Unidos
dc.description.fil
Fil: Rohrmann, Alexander. Universitat Potsdam; Alemania
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Fil: Schmitt, Axel K.. Universität Heidelberg; Alemania
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Fil: Stockli, Daniel F.. University of Texas at Austin; Estados Unidos
dc.description.fil
Fil: Strecker, Manfred R.. Universitat Potsdam; Alemania
dc.journal.title
Earth and Planetary Science Letters
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0012821X16300206
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.epsl.2016.02.009
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