Geochemistry of Cenozoic volcanic rocks of the Faroe Islands with a focus on their ultra-trace contents of Hg

0463530 - GLÚ 2017 CZ eng A - Abstrakt
Šišková, P. - Krmíček, Lukáš - Coufalík, Pavel
Geochemistry of Cenozoic volcanic rocks of the Faroe Islands with a focus on their ultra-trace contents of Hg.
Proceedings: Students in Polar and Alpine Research Conference 2016. Brno: Department of Geography, Faculty of Science, Masaryk University, 2016 - (Hrbáček, F.; Ondruch, J.; Ambrožová, K.; Ondráčková, L.; Nývlt, D.). s. 41-42. ISBN 9788021082038.
[Students in Polar and Alpine Research Conference 2016. 25.04.2016-27.04.2016, Brno]
Institucionální podpora: RVO:67985831 ; RVO:68081715
Klíčová slova: Faroe Islands * tholeiitic basalt * mercury content * continental crust
Kód oboru RIV: DB - Geologie a mineralogie; CB - Analytická chemie, separace (UIACH-O)
https://www.researchgate.net/publication/301822528_Geochemistry_of_Cenozoic_volcanic_rocks_of_the_Faroe_Islands_with_a_focus_on_their_ultratrace_contents_of_Hg

We focused our study on determination of ultra-trace mercury contents (by means of atomic absorption spectrometry) in volcanic rocks from the North Atlantic Igneous Province to test the hypothesis about the presence of continental metamorphic basement beneath the Faroe Islands. The results of combined optical microscopy, electron microprobe and whole-rock chemical study revealed that the studied volcanites are fine grained and aphyric to feldspar-phyric tholeiitic basalts with primary phenocrysts or microphenocrysts of plagioclase and pyroxene ± olivine in a matrix composed of tiny plagioclase laths ± tachylyte in various stages of alteration. Contents of Hg show great variability between samples even within the same formation. We presume that elevated concentrations of Hg in some samples are related to stagnation of individual pulses of parent magma in the continental crust below the Faroe Islands.
Trvalý link: http://hdl.handle.net/11104/0262704