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Kirianov V.Yu. Assessment of Kamchatkan Ash Hazard to Airlines // Volcanology and Seismology. 1993. Vol. 14. № 3. P. 246-269.
Zharinov N.A., Gorelchik V.I., Zhdanova E.Yu., Andreev V.N., Belousov A.B., Belousova M.G., Gavrilenko V.A., Garbuzova V.T., Demyanchuk Yu.V., Khanzutin V.P. The Eruptions of the Northern Group of Volcanoes on Kamchatka in 1988-1989: Seismological and Geodesic Data // Volcanology and Seismology. 1993. Vol. 13. Vol. 6. P. 649-681.
Гавриленко Г.М., Двигало В.Н., Фазлуллин С.М., Иванов В.В. Современное состояние вулкана Малый Семячик (Камчатка) // Вулканология и сейсмология. 1993. № 2. С. 3-7.
Гавриленко Г.М., Таран Ю.А., Черткова Л.В., Гричук Д.В. Геохимическая модель гидротермальной системы вулкана Ушишир (Курильские о-ва) // Вулканология и сейсмология. 1993. Т. 15. № 1. С. 63-79.
High hydrothermal activity is concentrated in the crater of Ushishir volcano which represents an almost closed bay connected with the ocean through a narrow and shallow strait. In their composition the thermal waters can be divided into two groups: (1) thermal waters of sea origin of high mineralization altered as a result of high-temperature interaction with rocks and (2) waters of sea origin heated in the near-surface conditions and mixed with fresh meteoric water. Ion and gas geothermometry as well as mixing plots in Na - 1ма_к and CI - coordinates suggest that these thermal vents are fed by steam-water geothermal reservoir with temperature of about 260°C; mineralization of the fluid in equilibrium zone is 23 g/l, C02 pressure being about 4 bar. Calculations of the equilibrium solution composition in the closed "water-andesite" system indicate that the observed Mg concentration could be formed in a wide temperature range but at low, lower than 0,01, mass rock-water ratios. Reequilibration of the solution at temperatures of 170-200°C in the near-surface conditions is most probable. The main discharge takes place primarily in the intersection zone of the ring-shaped and linear faults. Through the ring-shaped fracture mostly gas and steam-heated waters are discharged.
Гирина О.А. Пирокластические образования вулкана Безымянный извержений 1984-1989 гг. // Вулканология и сейсмология. 1993. № 4. С. 88-97.
Гирина О.А., Богоявленская Г.Е., Демянчук Ю.В. Извержение вулкана Безымянный 2 августа 1989 г. // Вулканология и сейсмология. 1993. № 2. С. 8-16.
Гирина О.А., Румянцева Н.А. Микростроение тефры вулкана Шивелуч // Вулканология и сейсмология. 1993. № 5. С. 34-47.
Егорова И.А. Возраст и палеогеографические условия формирования вулканогенно-осадочных отложений Узон-Гейзерной кальдерной депрессии на Камчатке (по результатам палинологических исследований) // Вулканология и сейсмология. 1993. № 2. С. 27-43.
На основании палинологических исследований приводится возрастное расчленение вулканогенно-осадочных отложений Узон-Гейзерной кальдерной депрессии и палеогеографическая обстановка времени осадконакопления. Установлен позднеплейстоцен-голоценовый возраст отложений. Датированы основные события посткальдерной вулканической деятельности в кальдере Узон.
Мелекесцев И.В., Брайцева О.А., Двигало В.Н., Базанова Л.И. Исторические извержения Авачинского вулкана на Камчатке (попытка современной интерпретации и классификации для долгосрочного прогноза типа и параметров будущих извержений). Ч. I (1737-1909 гг.) // Вулканология и сейсмология. 1993. № 6. С. 13-27.
The old views on the style of the Avachinsky eruptions during 1737- 1909 have partially been revised based on new data obtained by the authors. We specified their types and geological-geomorphological effect and made an assessment of the related volcanic hazards. All the eruptions were merely explosive except for the effusive-explosive eruption of 1894-1895. The eruptions of 1737, 1779 and 1827 are referred to large for this historical eruptive stage, the rest (of 1772, 1851-1855, 1878, 1881, 1894-1895 and 1909) are regarded as small and moderate.
Мелекесцев И.В., Двигало В.Н., Кирьянов В.Ю., Курбатов А.В., Несмачный И.А. Вулкан Эбеко (Курильские острова): История эруптивной активности и будущая вулканическая опасность. Часть I // Вулканология и сейсмология. 1993. № 3. С. 69-81.
The eruptive history of Ebeko since its arising about 2400 years ago to the beginning of the 17th century was reconstructed based on data of special geological, gecmorphological, tephrochronological researches using the 14С dating (more than 20 dates). Six stages of increased activity with the duration of 200-300 years were recognized. These stages are divided by quiet periods of the same duration. It is shown that the eruption of juvenile material (lava and pyroclastic) took place only at the first stage (420-200 years before our era). All the next eruptions were phreatic, but of different power. Large-scale maps and lopoplans of the Ebeko volcanic group (Ebeko, Neozhidanhy, Nezametny) with the nearest areas were compiled and the present-day morphology of the Ebeko summit part was described m detail based on ariborne materials of 1987, 1988, 1990. It is presented that, not considering the first eruptive stage, the main volcanic hazard for the Ebeco region and the town of Severo-Kurilsk situated near the volcano came from the moving of large lahars and tephra fall.