Geodynamic model of alkaline basaltoids with intraplate geochemical characteristics was developed on the base of systematization and analysis their space and time data in the East Kamchatka volcanic arc. The alkaline «intraplate» rocks in the East Kamchatka were formed as a result of partial melting at low degree of an «andersonian» type mantle plume. This mantle plume was generated in the astenosphere beneath the Pacific plate about 400-500 km from the deep sea trench similarly Hirano et al. (2006) flexure model and then was moved to the new forming East Kamchatka subduction zone by mantle convection. Adakites were produced by partial melting of the frontal part of the subducting Pacific plate in the initial stage of subduction. The model explains a short time of the formation of alkaline rocks, and their change by transitional rocks and adakites, and then by typical calk-alkaline rocks, and their position only in the subduction zone jump to the present-day position.

На протяжении нескольких лет на разных судах был собран материал по динамике и газогидрохимическим параметрам водных масс кальдеры Львиная Пасть (о-в Итуруп, Курильские острова). Формирование последних определяется поступлением подповерхностных охотоморских вод через высокий подводный порог и отличается нарушением прямого водообмена "море - кальдера". На распределение газогидрохимических характеристик вод кальдеры влияют динамика вод вертикальная циркуляция, наличие мощного слоя с нулевой устойчивостью, циклоническая циркуляция), предполагаемые подводные разгрузки, растворимость газов, активные микробиологические процессы.??В работе представлены графики и таблицы распределения Т° С, S%0, pH, NO3, СО2, На, Eh, CH/,, P, Si, O2, N2, содержание микроэлементов во взвеси и их соотношения.

The Paratunsky geothermal field has been in operation since 1964, mostly in a self-flowing mode, with a discharge rate of approximately 250 kg/s of thermal water at temperatures of 70–90°С (47 Mw, with the waste water having a temperature of 35°С). The water drawn from the field is used for local heating, spa heating, and for greeneries in the villages of Paratunsky and Termal’nyi (3000 residents). The potential market of thermal energy in Kamchatka includes Petropavlovsk-Kamchatskii (180000 residents), Elizovo (39 000), and Vilyuchinsk (22 000). The heat consumption in the centralized heating systems for Petropavlovsk-Kamchatskii is 1 623 000 GCal per annum (216 Mw). A thermohydrodynamic model developed previously is used to show that the Paratunsky geothermal reservoir can be operated in a sustainable mode using submersible pumps at an extraction rate of as much as 1375 kg/s, causing a moderate decrease in pressure (by no more than 8 bars) and temperature (by no more than 4°С) in the reservoir. Additional geothermal sources of heat energy may include the Verkhne-Paratunsky and Mutnovsky geothermal fields.