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Mineralogy and origin of aerosol from an arc basaltic eruption: Case study of Tolbachik volcano, Kamchatkaстатья
Информация о цитировании статьи получена из
Web of Science,
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 июля 2020 г.
- Авторы: Zelenski M., Kamenetsky V.S., Taran Yu, Kovalskii A.M.
- Журнал: Geochemistry, Geophysics, Geosystems
- Том: 21
- Номер: 2
- Год издания: 2020
- Издательство: Geochemical Society
- Местоположение издательства: United States
- Первая страница: e2019GC008802
- DOI: 10.1029/2019gc008802
- Аннотация: Intense emission of volcanic aerosol accompanied the 2012‐13 basaltic effusive eruption of Tolbachik volcano, Kamchatka. The aerosols sampled contain sulfuric acid droplets, glassy particles and 70 mineral phases. All aerosol particles may be classified by their origin. The fragmentation aerosol includes magma fragments: silicate glass clasts, silicate microspheres and small phenocrysts (olivine, pyroxene and magnetite). The alteration aerosol comprises particles of quenched silicate melt covered with secondary minerals (fluorides, sulfates and oxides/hydroxides of rock‐forming elements) and fragments of altered rocks composed solely of secondary minerals. The condensation aerosol dominated the mass during the later stages of the eruption when the explosive activity had ceased, and was characterized by the greatest variety of particle compositions. Na‐K sulfate and Fe (III) oxide comprised more than 95% of the solid fraction of the condensation aerosol. The remaining 5% was represented by native elements (Au, Ag‐Pt alloy, Pt); sulfides of Fe, Cu, Ag and Re; oxides and hydroxides of Al, Fe, Cu, Zn, Mo, W, Ta and Zr; halides of Al, Mg, Na, K, Ca, Cd, Pb, Ag and Tl; sulfates of Na, K, Pb, Ca and Ba; the only silicate was As‐bearing orthoclase. Droplets of H2SO4 formed the liquid phase of the condensation aerosol. Some of the aerosol components, such as magnetite spherules or phosphate‐carbonate‐fluorite association, likely had a nonvolcanic origin (country rocks, wood fly ash). The volcanic aerosols and their contained minerals, discharged at Tolbachik and elsewhere, results in a physical and chemical effect on the environment in the region of such volcanoes.
- Добавил в систему: Каменецкий Вадим Семенович