info:eu-repo/semantics/article
Provenance of dust to Antarctica: A lead isotopic perspective
Fecha
2016-03Registro en:
Gili, Stefania; Gaiero, Diego Marcelo; Goldstein, Steven L.; Chemale, Farid; Koester, Edinei; et al.; Provenance of dust to Antarctica: A lead isotopic perspective; American Geophysical Union; Geophysical Research Letters; 43; 5; 3-2016; 2291-2298
0094-8276
1944-8007
CONICET Digital
CONICET
Autor
Gili, Stefania
Gaiero, Diego Marcelo
Goldstein, Steven L.
Chemale, Farid
Koester, Edinei
Jweda, Jason
Vallelonga, Paul
Kaplan, Michael
Resumen
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.