Submarine Volcano 8.10 (Kuril Island Arc)

Blokh, Y.I.; Bondarenko, V.I.; Dolgal, A.S.; Novikova, P.N.; Petrova, V.V.; Pilipenko, O.V.; Rashidov, V.A.; Trusov, A.A.

Авторы: Blokh Yu I., Bondarenko V.I., Dolgal A.S., Novikova P.N., Petrova V.V., Pilipenko O.V., Rashidov V.A., Trusov A.A.
Журнал: Russian Journal of Pacific Geology
Том: 17
Номер: 2
Год издания: 2023
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 66
Последняя страница: 81
DOI: 10.1134/S1819714023080031
Аннотация: Submarine volcano 8.10, which is part of the South Iturup group of submarine volcanoes in the Kuril Island Arc (KIA), was studied using a proven technology of quantitative interpretation of hydromagneticsurvey materials in combination with echo sounding, continuous seismoacoustic profiling, and analysis of petromagnetic properties and chemical composition of dredged rocks. The technology makes it possible tointerpret directly from the original data without resorting to the procedure of their preliminary restoration inthe nodes of a regular grid. The studies found that dredged andesite-basalts and andesites are representativesof different lava flows that have a single magma source but differ in the conditions and dynamics of crystallization.The main carrier of the natural residual magnetization of andesite-basalts is titanomagnetite with lowTi content and that for andesites is magnetite. Feeding channels and peripheral magma chambers are identifiedin the volcanic edifice. Submarine volcano 8.10 and other studied KIA volcanoes formed during geomagneticinversions. The presence of hydroacoustic anomalies at the top of the volcano indicates that manifestationsof underwater gas-hydrothermal activity in the southern part of the KIA are more significant than wasthought until recently.
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