SUBMARINE VOLCANO 8.10 (KURIL ISLAND ARC)

The submarine volcano 8.10, part of the South Iturup group underwater volcanoes Kuril island arc (KIA), was studied using a proven technology quantitative interpretation hydromagnetic survey materials in combination with echo sounding, continuous seismoacoustic profiling, and analysis petromagnetic properties chemical composition dredged rocks. makes it possible to interpret directly from original data without resorting procedure their preliminary restoration nodes regular network. As result performed studies, established that andesite-basalts andesites are representatives different lava flows have single magmatic source, but differing conditions dynamics crystallization. main carrier natural residual magnetization basaltic is titanomagnetite low Ti content, for magnetite. In volcanic edifice, supply channels peripheral magma chambers distinguished. Volcano as well other KIA studied, formed during geomagnetic inversions. presence hydroacoustic anomalies at top indicates manifestations gas-hydrothermal activity southern more significant than thought until recently.