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Analysis of Trace Elements in the Bhq Ice Core, Law Dome, Antarctica*

  • Liu Yun-Gang (a1), Zhang Yun-Hui (a1), Li Gui-Qun (a1), Xiao Lun (a1) and Xie Zi-Chu (a2)...

Abstract

Trace elements in ice samples taken from Law Dome, Antarctica, were analysed using an instrumental neutron-activation analysis technique. A Jupiter multichannel analyser-computer system coupled to a Ge(Li) detector was used for the acquisition of γ-spectra and for data reduction. “Blanks” in water and in nitric acid, which were used in pre-concentration and sample transfer, were also analysed. To check the validity of this analytical procedure, a U.S. Environment Protection Agency water standard for trace elements was also analysed. The observed values agreed with the certified values.

The results (in ppb) of eight elements are:

Na   209         Mn   0.42   Mg  26   Fe  14

Sc    0.0017   Co   0.028   Al   9.6   Se   0.02

The enrichment factors for these eight elements relative to the Earth’s crust were calculated. These elements can be subdivided into three groups or sources according to their enrichment factors. The variations of elemental concentrations with depth show no positive tendency towards a systematic increase or decrease over the past 5000 years.

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Copyright

Footnotes

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page 297 note *

This paper was submitted to the Fourth International Symposium on Antarctic Glaciology, Bremerhaven, 4−11 September 1987, but it was not presented at the meeting (see Annals of Glaciology, Vol. 11, 1988).

Footnotes

References

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