Structure features of convective channels from thermal sources in Mutnovskii volcano (South Kamchatka)

Autor: I. V. Vernikovskaya, N. P. Sez’ko, Yu.A. Manshtein, A.K. Manshtein, G. M. Gavrilenko, Svetlana Bortnikova
Rok vydání: 2008
Předmět:
Zdroj: Doklady Earth Sciences. 423:1404-1409
ISSN: 1531-8354
1028-334X
Popis: Features of the composition of thermal sources in active volcanic regions reflect a multitude of factors influencing the spectrum and content of chemical elements in the solutions reaching the surface. The primary factor is the ratio of magmatic fluids and meteoric waters. It determines the physico-chemical conditions of precipitation from surface solutions. This ratio can shift to either side depending on the structural features of transport: fissured columns and, particularly, open channels favor unconstrained ascent of fluids to the surface. The composition of parent fissures through which filtration of solutions and leaching of elements occur plays an important role. Mixed solutions with a greater proportion of deep components are aggressive and can extract a much greater amount of chemical elements from the volcanic host rocks than a solution in which the meteoric component has the determining quota [1]. The data that appeared in the last decade about the wide range of microelements and their specific associations in thermal waters [2, 3] allow us to describe quantitatively the sources of matter and chemical element precipitation in the surface discharges.
Databáze: OpenAIRE
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