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COUFALÍK, P. ZVĚŘINA, O. KRMÍČEK, L. POKORNÝ, R. KOMÁREK, J.
Original Title
Ultra-trace analysis of Hg in alkaline lavas and regolith from James Ross Island
Type
journal article in Web of Science
Language
English
Original Abstract
Polar regions represent a unique environment for the study of mercury cycling in the global ecosystem. Our research was focused on the assessment of the origin and mobility of mercury in the geochemical cycle in Maritime Antarctic (James Ross Island) by means of atomic absorption spectrometry. Mercury content in a set of extrusive (subaerial, subaqueous) and intrusive (dyke) alkaline basalts ranged between 1.6 μg kg-1 (for samples without xenoliths) and 8 μg kg-1 (for samples containing crustal xenoliths). The mercury content in alkaline basalts indicates a very low concentration of mercury in peridotitic mantle sources. Samples of regolith from James Ross Island were subjected to a comprehensive analytical procedure proposed for ultra-trace mercury concentrations involving fractionation and thermal analysis. Total mercury contents in regolith (2.7–11.3 μg kg-1) did not deviate from the natural background in this part of Antarctica. Additionally, the obtained results are about two orders of magnitude smaller than values formerly assumed for primary mercury contents in basaltic lavas. Our results from Antarctica were compared with mercury contents in basaltic rocks from Greenland and the findings were confirmed. It seems that the input of mercury of geological origin into the polar ecosystem is apparently lower than expected.
Keywords
basaltic volcanite; fractionation; mercury; polar region; weathered material
Authors
COUFALÍK, P.; ZVĚŘINA, O.; KRMÍČEK, L.; POKORNÝ, R.; KOMÁREK, J.
RIV year
2015
Released
1. 6. 2015
Publisher
Cambridge University Press
Location
Cambridge
ISBN
0954-1020
Periodical
ANTARCTIC SCIENCE
Year of study
27
Number
3
State
United Kingdom of Great Britain and Northern Ireland
Pages from
281
Pages to
290
Pages count
10
URL
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9672921&fileId=S0954102014000819
BibTex
@article{BUT115007, author="COUFALÍK, P. and ZVĚŘINA, O. and KRMÍČEK, L. and POKORNÝ, R. and KOMÁREK, J.", title="Ultra-trace analysis of Hg in alkaline lavas and regolith from James Ross Island", journal="ANTARCTIC SCIENCE", year="2015", volume="27", number="3", pages="281--290", doi="10.1017/S0954102014000819", issn="0954-1020", url="http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9672921&fileId=S0954102014000819" }