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Model of Mercury Flux Associated with Volcanic Activity

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COUFALÍK Pavel KRMÍČEK Lukáš ZVĚŘINA Ondřej MESZAROSOVÁ Natália HLADIL Jindřich KOMÁREK Josef

Rok publikování 2018
Druh Článek v odborném periodiku
Časopis / Zdroj Bulletin of Environmental Contamination and Toxicology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Doi http://dx.doi.org/10.1007/s00128-018-2430-5
Klíčová slova Mercury content; Basalt; Andesite; Dacite
Popis Volcanic activity is one of the primary sources of mercury in the earth's ecosystem. In this work, volcanic rocks from four geotectonically distinct localities (the Czech Republic - intraplate, rift-related alkaline basaltic rocks; Iceland - hotspot/rift-related tholeiitic basaltic rocks; Japan - island arc calc-alkaline andesites; and Alaska - continental arc calc-alkaline dacites) were studied. Ultra-trace Hg contents in all samples ranged from 0.3 up to 6 mu g/kg. The highest Hg content was determined for volcanic ash from Mount Redoubt (Alaska, USA). In the case of basaltic volcanic rocks, the obtained results are about two orders of magnitude smaller than values formerly assumed for primary mercury contents in basaltic lavas. They are close to predicted Hg contents in the mantle source, i.e. below 0.5 mu g/kg. Hg degassing is probably a key process for the resulting Hg contents in material ejected during volcanic eruption, which is previously enriched by Hg in the shallow-crust.
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