Provenance of dust to Antarctica: A lead isotopic perspective

Antarctic ice preserves an ~800 kyr record of dust activity in the Southern Hemisphere. Major efforts have been dedicated to elucidate the origin of this material in order to gain greater insight into the atmospheric dust cycle. On the basis of Pb isotopes in Antarctic dust samples and potential sou...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Gili, Stefania, Gaiero, Diego Marcelo, Goldstein, Steven L., Chemale, Farid, Koester, Edinei, Jweda, Jason, Vallelonga, Paul, Kaplan, Michael
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union
Subjects:
ANTARCTICA
DUST
PATAGONIA
PB ISOTOPES
PUNA-ALTIPLANO
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
Antarctic
Patagonia
Argentina
Antarc*
Antarctica
Tierra del Fuego
Online Access:http://hdl.handle.net/11336/130678
Description
Summary:Antarctic ice preserves an ~800 kyr record of dust activity in the Southern Hemisphere. Major efforts have been dedicated to elucidate the origin of this material in order to gain greater insight into the atmospheric dust cycle. On the basis of Pb isotopes in Antarctic dust samples and potential sources, this contribution demonstrates for the first time that Patagonia is the main contributor of dust to Antarctica during interglacial periods as well as glacials, although the potential importance of Tierra del Fuego remains unclear because of its geochemical similarities to Patagonia. An important new finding is that the Puna-Altiplano sector of the continent is a second important dust source to eastern Antarctica during both glacials and interglacials, being more prominent during interglacials. The data indicate South America is the primary dust source to Antarctica during both glacials and interglacials. Fil: Gili, Stefania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Goldstein, Steven L. Columbia University; Estados Unidos. Lamont‐Doherty Earth Observatory; Estados Unidos Fil: Chemale, Farid. Universidad de Vale do Rio dos Sinos; Brasil Fil: Koester, Edinei. Universidade Federal do Rio Grande do Sul; Brasil Fil: Jweda, Jason. Columbia University; Estados Unidos. Lamont‐Doherty Earth Observatory; Estados Unidos Fil: Vallelonga, Paul. Universidad de Copenhagen; Dinamarca Fil: Kaplan, Michael. Lamont‐Doherty ...

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