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Records: 2266
 1991
Селянгин О.Б., Брайцева О.А. Вулкан Малый Семячик // Действующие вулканы Камчатки. В 2-х т.. 1991. Т. 2. С. 160-179.
Таран Ю.А., Вакин Е.А., Пилипенко Г.Ф., Рожков А.М. Геохимические исследования в кратере вулкана Мутновский (Камчатка) // Вулканология и сейсмология. 1991. № 5. С. 37-55.    Annotation
Представлены данные по химическому и изотопному составу фумарольных газов и термальных вод, отобранных в кратере Мутновского вулкана за период с 1963 по 1989 г. Для интерпретации данных используется термодинамический подход, балансовые оценки, а также сведения о гидрогеологических особенностях Мутновского геотермального района и постройки вулкана. Три обособленные группы фумарольных выходов в кратерах вулкана, стабильно действующие на протяжении многих лет (Активная воронка, Верхнее поле и Донное поле), отличаются по составу газов, изотопному составу воды, а-активности и гелиевым отношениям. Показано, что в формировании состава фумарольных газов участвуют магматические флюиды, поверхностные и термальные воды, а также процессы кипения ультракислых рассолов - смешанных вод, образующих локальную гидротермальную систему Донного поля кратера Мутновского вулкана.

Data are presented about the chemical and isotopic composition of fumarolic gases and thermal water collected in the crater of the Mutnovskiy volcano from 1963 to 1989. A thermodynamic approach, balance estimates and information on the hydrogeological characteristics of the Mutnovskiy geothermal field and volcanic structure were used in the interpretation of the data. Three groups of fumarolic vents in the craters of the volcano have been active for many years (the Aktivnaya cone, the Verkhneye field and the Donnoye field) and differ in the composition of their gases, the isotopic composition of the water, a activity and He ratios. It was shown that the composition of the fumarolic gases is formed as a result of the interaction between the magmatic fluid, the surface and thermal waters and also the boiling of ultra-acidic brines-the mixed waters that form the local hydrothermal system of the Donnoye field in the crater of the Mutnovskiy volcano.
Федотов С.А. О механизме вулканической деятельности на Камчатке, Курило-Камчатской дуге и в сходных структурах // Действующие вулканы Камчатки. В 2-х т.. 1991. Т. 1. С. 18-35.
Федотов С.А., Балеста С.Т., Двигало В.Н., Разина А.А., Флеров Г.Б., Чирков А.М. Новые Толбачинские вулканы // Действующие вулканы Камчатки. В 2-х т.. 1991. Т. 1. С. 214-279.
 1990
Alidibirov M.A., Bogoyavlenskaya G.E., Kirsanov I.T., Firstov P.P., Girina O.A., Belousov A.B., Zhdanova E.Yu., Malyshev A.I. The 1985 eruption of Bezymianny // Volcanology and Seismology. 1990. V. 10. № 6. P. 839-863.
Kochegura V.V., Zubov A.G., Braytseva O.A. Magnetostratigraphy of Kamchatkan Holocene formations of soil and pyroclastics // Journal of Volcanology and Seismology. 1990. V. 8. № 6. P. 825-849.    Annotation
An account is given of magnetostratigraphic studies of Kamchatkan Holocene formations: the cover of soil and pyroclastics and the rocks of the cinder cones from the flank eruptions of Klyuchevskoi Volcano. А study was made of seven sections of the soil and pyroclastics and of samples from 17 cinder cones. А detailed account is given of the data processing procedure. Consideration is given to the reasons for the established incompleteness of the paleomagnetic record in the sections and it is demonstrated that adequately detailed reconstruction of the history of the geomagnetic 1ield is possible only provided that а study is made of а series of рагаllеl sections. The trajесtory of the geomagnetic field vector over the last 4000 years is determined on the basis of the material on radiocarbon datings. Seven cycles of paleosecular variations are distinguished in the age range investigated; each of these cycles has individual features by which they can be recognised and used for stratigraphic correlation. The, features taken were the direction of rotation of the vector, the shape and size of its loops, and the length of the cycles. Correlation of the sections based on paleomagnetic data was found to be in good agreement with the tephrostratigraphic correlation and enabled corrections to be made to the age of some horizons, including the archeological layers of the primitive settlement at Zhupanovo and the cinder cones. The metachronous magnetization present in some tephra layers was found to be an obstacle to any improvement in the accuracy and detail of magnetochronological reconstructions.
Muravyev Y.D., Salamatin A.N. Mass balance and thermal regime of a crater glacier at Ushkovskii volcano // Volcanology and Seismology. 1990. V. 11. № 3. P. 411-424.    Annotation
A thermal model has been constructed for a steady-state glacier of Ushkovskii Volcano. Analysis of ice mass balance components has revealed elevated heat flow (mean valce 10 W/m2) in the summit crater wich has remained nearly constant over the last 40 years. The measured accumulation rate and temperature distribution in the snow and firn body in the middle of the Gorshkov crater suggest the existence of a considerable uplift (a small embedded crater) overlain by the glaciers. The formulas proposed in this paper can be used to evaluate critical state parameters for unsteady ice masses on the slopes of Klyuchevskoi Volcano.

Построена теплофизическая модель стационарного состояния ледника в активном кратере Ушковского вулкана. Анализ составляющих баланса массы льда показал повышенный геотермический поток (среднее значение 10 Вт/м¤) в пределах вершинного конуса и слабую его изменчивость за последние 40 лет. По измеренной скорости аккумуляции и распределению температуры в снежнофирновой скорости аккумуляции и распределению температуры в снежно-фирновой толще в центре кратера Горшкова предполагается существование значительного поднятия (вложенного малого кратера), перекрытого ледником.
Полученные расчетные формулы помогут оценить параметры критических состояний нестационарных ледяных масс на склонах Ключевского вулкана.
Slezin Yu.B. The morphology and rheology of modern Klyuchevskoi parasitic lava flows // Volcanology and Seismology. 1990. V. 10. V. 5. P. 665-686.
Vinogradov V.N., Muravyev Y.D., Nikitina I.M., Salamatin A.N. Production of phreatic explosions in the interaction of lava and ice // Volcanology and Seismology. 1990. V. 9. № 1. P. 89-98.    Annotation
A matematical model is given of the formation of phreatic explosions in lava flows coming into contact with ice formations. Quantitative characteristics are derived for the various stages in the development of the explosion; by means of wich its strength and other parameters may be evaluated. The theoretical calculation results are in agreement with empirical data.
Zharinov N.A., Zhdanova E.Yu., Belousov A.B., Belousova M.G., Ivanov A.P., Malyshev A.I., Khanzutin V.P. Activity of North Kamchatkan volcanoes in 1985 // Volcanology and Seismology. 1990. V. 10. V. 3. P. 331-346.



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