Polycyclic Aromatic Hydrocarbons in Holocene Sediments and Tephra of Iceland (Composition and Distribution Features) |
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| Authors: | Geptner A R Alekseeva T A Pikovskii Yu I |
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| Institution: | (1) Geological Institute (GIN), Russian Academy of Sciences, Pyzhevskii per. 7, Moscow, 1090017, Russia;(2) Geographical Faculty, Moscow State University (MGU), Vorob'evy gory, Moscow, 118899, Russia |
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| Abstract: | This work considers results of the study of Holocene cover sediments of Iceland largely composed of wind-transported palagonitized hyaloclastite particles and coeval horizons of acid and basic tephra. It is established that polyciclic aromatic hydrocarbons (PAH) are released from the basaltic glass in natural environments only in the case of intense physicochemical alteration and destruction of its structure. This process does not influence the composition of polycyclic aromatic hydrocarbons and their quantitative proportions. No new polyclic aromatic hydrocarbons formed during several thousands of years of the Holocene section accumulation. Hydrocarbons are transferred from fixed the state in basaltic glass into the free state in palagonites practically without any changes. Polyciclic aromatic hydrocarbons were mainly redeposited by winds, derived together with palagonite from weathered hyaloclastites, and precipitated from atmosphere with tephra during eruptions. |
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