Богоявленская Г.Е., Иванов Б.В., Кирсанов И.Т., Максимов А.П. Зависимость кристаллизации лав вулкана Безымянного от механизма извержения / Глубинное строение, сейсмичность и современная деятельность Ключевской группы вулканов. Владивосток: ДВНЦ АН СССР. // Глубинное строение, сейсмичность и современная деятельность Ключевской группы вулканов. 1976. С. 118-127.
Annotation
Рассматриваютя особенности извержения вулкана Безымянного за период с 1955 по 1974 г. Установленные ранее закономерности в изменении количественно-минералогического состава позволяют выделить два этапа современной деятельности вулкана. Анализ этих закономерностей на основе диаграмм плавления андезитов близкого состава показал возможность существования высоких давлений в верхних частях магматического канала, по нашему мнению, определяющих петрографический облик пород непосредственно перед пароксизмальным извержением
Богоявленская Г.Е., Кирсанов И.Т. Двадцать пять лет вулканической активности вулкана Безымянного // Вулканология и сейсмология. 1981. № 2. С. 3-13.
Богоявленская Г.Е., Кирсанов И.Т. Новый этап развития внутрикратерной экструзии вулкана Безымянного // Современный вулканизм и связанные с ним геологические, геофизические и геохимические процессы. М: 1980. С. 131-132.
Богоявленская Г.Е., Кирсанов И.Т., Красов Н.Ф. Современная деятельность вулкана Безымянного и вопросы кристаллизации андезитовых магм // Петрология литосферы и рудоностность. Ленинград: 1981. С. 107-108.
Богоявленская Г.Е., Кирсанов И.Т., Хренов А.П. Зависимость кристаллизации вулканических пород от механизма извержения // Cоветско-японский симпозиум (III) по геодинамике и вулканизму зоны перехода от Азиатского континента к Тихому океану. Южно-Сахалинск: 1976. Вып. 3. С. 29
Богоявленская Г.Е., Максимов А.П. Активность вулканов мира в 1984 г. // Вулканология и сейсмология. 1985. № 5. С. 102-107.
Богоявленская Г.Е., Наумов В.Б., Толстых М.Л., Бабанский А. Д., Хубуная С.А. Составы расплавов и условия кристаллизации андезитов вулканов Авачинский, Безымянный, Шивелуч и Карымский (по данным изучения расплавных включений) // Вулканология и сейсмология. 2004. № 6. С. 35-48.
Annotation
Studies of melt inclusions in minerals of some Kamchatka volcanoes are reported. We studies andesite basalts and andesites in volcanoes situated in the Central Kamchatka Depression (Shiveluch and Bezymyannyi) and in the East Kamchatka Volcanic Belt (Avacha and Karymskii). In addition, we studied the basalts of the 1996 eruption in the Karymskii Volcanic Center and the dacites on Dikiy Greben Volcano, southern Kamchatka. We used homogenization of melt inclusions and the analysis of chilled glass in these inclusions with electron and ion microlog sondes. More than 200 melt inclusions have been studied in minerals from 25 volcanic rock samples. It was found that the compositions of melt inclusions in andesite phenocrysts strongly vary in basicity; the content of SiO 2 varies between 56 and 80% wt, increasing silica percentage going along with decreasing concentrations of Al2O3, FeO, MgO, CaO and increasing concentrations of Na2O and K2O. Most (about 80%) of glass in the inclusions have dacite and rhyolite compositions. However, the compositions of acid melts (SiO2 > 65% wt) which produce the andesites are significantly different from those which produce the dacites and rhyolites as to the content of TiO2, FeO, MgO, CaO and K2O. Comparison between the compositions of melt inclusions from andesite plagioclase on the four volcanoes showed considerable differences. The basic andesites (56-59% SiO2) of Bezymyannyi Volcano exhibit a large scatter in inclusion composition (SiO2 = = 56-81%). The more acid andesites (SiO2 = 61%) of Shiveluch Volcano show a lower scatter in inclusion composition (SiO2 = 67-79%). The melt inclusions in the Karymskii andesites are amore basic. They are enriched with Fe, Ti, Ca, Mg, P, Na and are considerably depleted in K. The melts that produce the Karymskii andesites are probably less differentiated. On the volcanoes under study we also found high-potassium melts (K 2O = 3.8-6.8% wt), independent of the concentrations of SiO2 in them (the range here is between 51.4 and 77.2% wt). The melts differ considerably between volcanoes as to the concentration of volatiles. The greatest concentrations of H2O are found in the Shiveluch melts (3.0 to 7.2% wt with the mean equal to 4.7% wt) and on Avacha (4.7-4.8% wt), lower concentrations being in the melts of Dikiy Greben (0.4-1.8% wt) and Bezymyanyi (<1% wt). Using fluid inclusions of CO2 found in andesite plagioclase of Shiveluch Volcano, we inferred a pressure of 350-1600 bars, which corresponds to the depth of the magma chamber equal to 1.5-6 km. We found the concentrations of 17 admixture elements in glass of melt inclusions sampled from the plagioclase of four volcanoes (Avacha, Bezymyannyi, Dikiy Greben, Shiveluch). Judging by the concentrations of these elements, the melts here studied are similar to the typical island arc magmas.
Большое трещинное Толбачинское извержение. Камчатка. 1975–1976 / Отв. ред. Федотов С.А. М.: Наука. 1984. 637 с.
Annotation
The large Tolbachik fissure eruption occurred in Kamchatka in 1975—1976. It was the largest basaltic eruption of the Kurile-Kamchatka volcanic belt and also one of the six largest fissure eruptions of the world over the historic period. The eruption had been predicted and studied in detail during its one-and-a-half-year activity and after its end. As a consequence of considerable investigations it became one of the best studied volcanic eruption. This monograph presents the main results of the seven-year investigations over the period 1975—1982: the detailed description of the eruption, its physical properties, the history of volcanism in the region of the eruption, petrology of its products, data on magmatic gases and postvolcanic processes, data of seismological, geodetic and other geophysical explorations, study and explanation of its mechanism.
