Pb and Ba concentrations and Pb isotope ratios in EPICA Dome C ice 2-217 ky BP, supplement to: Vallelonga, Paul T; Gabrielli, Paolo; Balliana, E; Wegner, Anna; Delmonte, Barbara; Turetta, Clara; Burton, G; Vanhaecke, Frank; Rosman, K J R; Hong, Sungmin; Boutron, Claude F; Cescon, Paolo; Barbante, Carlo (2010): Lead isotopic compositions in the EPICA Dome C ice core and southern hemisphere potential source areas. Quaternary Science Reviews, 29(1-2), 247-255

DOI

A record of Pb isotopic compositions and Pb and Ba concentrations are presented for the EPICA Dome C ice core covering the past 220 ky, indicating the characteristics of dust and volcanic Pb deposition in central East Antarctica. Lead isotopic compositions are also reported in a suite of soil and loess samples from the Southern Hemisphere (Australia, Southern Africa, Southern South America, New Zealand, Antarctica) in order to evaluate the provenance of dust present in Antarctic ice. Lead isotopic compositions in Dome C ice support the contention that Southern South America was an important source of dust in Antarctica during the last two glacial maxima, and furthermore suggest occasional dust contributions from local Antarctic sources. The isotopic signature of Pb in Antarctic ice is altered by the presence of volcanic Pb, inhibiting the evaluation of glacial–interglacial changes in dust sources and the evaluation of Australia as a source of dust to Antarctica. Consequently, an accurate evaluation of the predominant source(s) of Antarctic dust can only be obtained from glacial maxima, when dust-Pb concentrations were greatest. These data confirm that volcanic Pb is present throughout Antarctica and is emitted in a physical phase that is free from Ba, while dust Pb is transported within a matrix containing Ba and other crustal elements. Sample ages calculated according to EDC3 chronology (doi:10.1594/PANGAEA.671367) reported by Parrenin et al. (2007) doi:10.5194/cp-3-485-2007.Delta Deuterium values (doi:10.1594/PANGAEA.683655) by Jouzel et al. (2007) doi:10.1126/science.1141038.Funding Sources: Australian Research Council (DP0345625), Antarctic Science Advisory Committee, Glaciology Section (No. 1092,2334), European Union Marie Curie IIF Fellowship (MIF1-CT-2006-039529, TDICOSO).

Identifier
DOI https://doi.org/10.1594/PANGAEA.767617
Related Identifier https://doi.org/10.1016/j.quascirev.2009.06.019
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.767617
Provenance
Creator Vallelonga, Paul T; Gabrielli, Paolo; Balliana, E; Wegner, Anna; Delmonte, Barbara; Turetta, Clara; Burton, G; Vanhaecke, Frank; Rosman, K J R; Hong, Sungmin; Boutron, Claude F; Cescon, Paolo; Barbante, Carlo
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2011
Funding Reference Fifth Framework Programme; Fourth Framework Programme
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 666 data points
Discipline Earth System Research
Spatial Coverage (123.350 LON, -75.100 LAT); Dome C, Antarctica
Temporal Coverage Begin 1993-01-01T00:00:00Z
Temporal Coverage End 2004-12-31T00:00:00Z