Back to Search
Start Over
Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas
- Source :
- Quaternary science reviews 29 (2010): 247–255., info:cnr-pdr/source/autori:Vallelonga P.; Gabrielli P.; Balliana E.; Wegner A.; Delmonte B.; Turetta C.; Burton G.; Vanhaecke F.; Rosman K.J.R.; Hong S.; Boutron C.F.; Cescon P.; Barbante C./titolo:Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas./doi:/rivista:Quaternary science reviews/anno:2010/pagina_da:247/pagina_a:255/intervallo_pagine:247–255/volume:29, Quaternary Science Reviews, Quaternary Science Reviews, Elsevier, 2010, 29 (1-2), pp.247-255. ⟨10.1016/j.quascirev.2009.06.019⟩
- Publication Year :
- 2010
- Publisher :
- Pergamon Press., New York, Regno Unito, 2010.
-
Abstract
- International audience; 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.
- Subjects :
- Archeology
Provenance
010504 meteorology & atmospheric sciences
lead, barium, ice cores, volcanic activity
GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA
Geochemistry
010502 geochemistry & geophysics
01 natural sciences
Isotopic signature
Ice core
Loess
GEO/08 - GEOCHIMICA E VULCANOLOGIA
Settore CHIM/01 - Chimica Analitica
Glacial period
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
Southern Hemisphere
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
ANTHROPOGENIC LEAD
Global and Planetary Change
geography
geography.geographical_feature_category
Lead (sea ice)
TRACE-ELEMENT
Geology
MASS-SPECTROMETRY
ANTARCTIC ICE
Oceanography
Volcano
13. Climate action
Subjects
Details
- Language :
- English
- ISSN :
- 02773791
- Database :
- OpenAIRE
- Journal :
- Quaternary science reviews 29 (2010): 247–255., info:cnr-pdr/source/autori:Vallelonga P.; Gabrielli P.; Balliana E.; Wegner A.; Delmonte B.; Turetta C.; Burton G.; Vanhaecke F.; Rosman K.J.R.; Hong S.; Boutron C.F.; Cescon P.; Barbante C./titolo:Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas./doi:/rivista:Quaternary science reviews/anno:2010/pagina_da:247/pagina_a:255/intervallo_pagine:247–255/volume:29, Quaternary Science Reviews, Quaternary Science Reviews, Elsevier, 2010, 29 (1-2), pp.247-255. ⟨10.1016/j.quascirev.2009.06.019⟩
- Accession number :
- edsair.doi.dedup.....09aa0f934b3469674458920bdb8d4632
- Full Text :
- https://doi.org/10.1016/j.quascirev.2009.06.019⟩