Počet záznamů: 1
Ultra-trace analysis of Hg in alkaline lavas and regolith from James Ross Island
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SYSNO ASEP 0443682 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Ultra-trace analysis of Hg in alkaline lavas and regolith from James Ross Island Tvůrce(i) Coufalík, Pavel (UIACH-O) ORCID, RID
Zvěřina, O. (CZ)
Krmíček, Lukáš (GLU-S) RID, ORCID, SAI
Pokorný, R. (CZ)
Komárek, J. (CZ)Celkový počet autorů 5 Zdroj.dok. Antarctic Science. - : Cambridge University Press - ISSN 0954-1020
Roč. 27, č. 3 (2015), s. 281-290Poč.str. 10 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova basaltic volcanite ; fractionation ; mercury ; polar region ; weathered material Vědní obor RIV CB - Analytická chemie, separace Institucionální podpora UIACH-O - RVO:68081715 ; GLU-S - RVO:67985831 UT WOS 000356492300007 DOI 10.1017/S0954102014000819 Anotace 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. Pracoviště Ústav analytické chemie Kontakt Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Rok sběru 2016
Počet záznamů: 1