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A record of lead isotopes from 237 ky to 409ky BP in the Vostok ice core, antarctica

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Title
A record of lead isotopes from 237 ky to 409ky BP in the Vostok ice core, antarctica
Other Titles
남극보스톡 빙하에 기록된 과거 237ky부터 409ky까지의 납동위원소 변화
Authors
L. Burn
C.P. Ferrari
Hur, Soon Do
P. Vallelonga
C. Barbante
J.R. Petit
C.F. Boutron
K.J.R. Rosman
Lee, Khanghyun
Hong, Sungmin
Keywords
Antarctica; Vostok ice core; climate change; lead isotope
Issue Date
2005
Citation
L. Burn, et al. 2005. A record of lead isotopes from 237 ky to 409ky BP in the Vostok ice core, antarctica. Brazil:Centro de Tecnologia Mineral. Brazil:Centro de Tecnologia Mineral. 2005.06.09~.
Abstract
Thermal ionization mass spectrometry has been used to measure Lead (Pb), Barium (Ba) and Pb isotopes in ice dating from 237 ky to 409 ky BP, drilled at Vostok, Antarctica. Significant changes occurred in the Pb and Ba concentrations and the 206Pb/207Pb isotopic ratios in these samples. Higher metal concentrations were found during the colder periods, and this was accompanied by lower 206Pb/207Pb ratios. This suggests that the isotopic composition of Pb present in the atmosphere in Antarctica during colder colder periods is diluted by Pb in terrestrial dust which is present at high concentrations during these periods, particularly near the glacial maxima.
URI
http://repository.kopri.re.kr/handle/201206/7603
Conference Name
Brazil:Centro de Tecnologia Mineral
Conference Place
Brazil:Centro de Tecnologia Mineral
Conference Date
2005.06.09~
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