Библиография
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Записей: 2735
 2011
Фирстов П.П., Рашидов В.А., Мельникова А.В., Андреев В.И., Шульженкова В.Н. Ядерно-геофизические исследования в природном парке «Налычево» (Камчатка) // Вестник КРАУНЦ. Серия: Науки о Земле. 2011. Вып. 17. № 1. С. 91-101.
   Аннотация
В 2009-2010 гг. в центральной части Природного парка «Налычево» были выполнены ядерно-геофизические исследования. В пределах термальной площадки «Котел» выявлены локальные аномалии γ-излучения со значением I ≥ 20-30 мкР/ч, вызванные повышенным содержанием радия, который откладывался в травертиновом покрове в зонах разгрузки термальных вод. Здесь зарегистрированы высокие значения объемной активности радона в почвенном воздухе, обусловленные, с одной стороны, наличием эманирующих коллекторов с повышенным содержанием радия в травертинах в местах бывших выходов термальных вод, и, с другой стороны, в зонах дизъюнктивных нарушений, которые, как правило, трассируются отрицательными формами рельефа. На техногенной термальной площадке «Грифон Иванова» формирование травертинового
покрова сопровождается отложением радийсодержащих минералов на расстоянии до первых сотен метров от источника, где фиксируются значения I ≥ 8 мкР/ч вдоль дренажной траншеи.
Фирстов П.П., Шакирова А.А. Сейсмические явления, сопровождавшие извержение вулкана Кизимен в 2011 г. // Вестник КРАУНЦ. Серия: Науки о Земле. 2011. Вып. 18. № 2. С. 7-13.
Хренов А.П. Исследование вулканов методами дистанционного спутникового зондирования // Земля и Вселенная. 2011. Вып. 5. С. 12-22.
Хренов А.П. Исследование активных вулканов методами дистанционного зондирования // Современные проблемы дистанционного зондирования Земли из космоса. 2011. Т. 8. № 2. С. 166-178.
 2010
Andrews Benjamin J., Gardner James E. Effects of caldera collapse on magma decompression rate: An example from the 1800 14C yr BP eruption of Ksudach Volcano, Kamchatka, Russia // Journal of Volcanology and Geothermal Research. 2010. Vol. 198. № 1–2. P. 205 - 216. doi: 10.1016/j.jvolgeores.2010.08.021.
   Аннотация
Caldera collapse changes volcanic eruption behavior and mass flux. Many models of caldera formation predict that those changes in eruption dynamics result from changes in conduit and vent structure during and after collapse. Unfortunately, no previous studies have quantified or described how conduits change in response to caldera collapse. Changes in pumice texture coincident with caldera formation during the 1800 14C yr BP KS1 eruption of Ksudach Volcano, Kamchatka, provide an opportunity to constrain magma decompression rates before and after collapse and thus estimate changes in conduit geometry. Prior to caldera collapse, only white rhyodacite pumice with few microlites and elongate vesicles were erupted. Following collapse, only gray rhyodacite pumice containing abundant microlites and round vesicles were erupted. Bulk compositions, phase assemblages, phenocryst compositions, and geothermometry of the two pumice types are indistinguishable, thus the two pumice types originated from the same magma. Geothermobarometry and phase equilibria experiments indicate that magma was stored at 100–125 MPa and 895 ± 5 °C prior to eruption. Decompression experiments suggest microlite textures observed in the white pumice require decompression rates of > 0.01 MPa s− 1, whereas the textures of gray pumice require decompression at ~ 0.0025 MPa s− 1. Balancing those decompression rates with eruptive mass fluxes requires conduit size to have increased by a factor of ~ 4 during caldera collapse. Slower ascent through a broader conduit following collapse is also consistent with the change from highly stretched vesicles present in white pumice and to round vesicles in gray pumice. Numerical modeling suggests that the mass flux and low decompression rates during the Gray phase can be accommodated by the post-collapse conduit developing a very broad base and narrow upper region.
Belousov Alexander, Belousova Marina, Chen Chang-Hwa, Zellmer Georg F. Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues // Journal of Volcanology and Geothermal Research. 2010. Vol. 191. № 3-4. P. 205-221. doi:10.1016/j.jvolgeores.2010.02.001.
Bindeman I.N., Leonov V.L., Izbekov P.E., Ponomareva V.V., Watts K.E., Shipley N.K., Perepelov A.B., Bazanova L.I., Jicha B.R., Singer B.S., Schmitt A.K., Portnyagin M.V., Chen C.H. Large-volume silicic volcanism in Kamchatka: Ar–Ar and U–Pb ages, isotopic, and geochemical characteristics of major pre-Holocene caldera-forming eruptions // Journal of Volcanology and Geothermal Research. 2010. Vol. 189. № 1-2. P. 57-80. doi:10.1016/j.jvolgeores.2009.10.009.
   Аннотация
The Kamchatka Peninsula in far eastern Russia represents the most volcanically active arc in the world in terms of magma production and the number of explosive eruptions. We investigate large-scale silicic volcanism in the past several million years and present new geochronologic results from major ignimbrite sheets exposed in Kamchatka. These ignimbrites are found in the vicinity of morphologically-preserved rims of partially eroded source calderas with diameters from ∼ 2 to ∼ 30 km and with estimated volumes of eruptions ranging from 10 to several hundred cubic kilometers of magma. We also identify and date two of the largest ignimbrites: Golygin Ignimbrite in southern Kamchatka (0.45 Ma), and Karymshina River Ignimbrites (1.78 Ma) in south-central Kamchatka. We present whole-rock geochemical analyses that can be used to correlate ignimbrites laterally. These large-volume ignimbrites sample a significant proportion of remelted Kamchatkan crust as constrained by the oxygen isotopes. Oxygen isotope analyses of minerals and matrix span a 3‰ range with a significant proportion of moderately low-δ18O values. This suggests that the source for these ignimbrites involved a hydrothermally-altered shallow crust, while participation of the Cretaceous siliceous basement is also evidenced by moderately elevated δ18O and Sr isotopes and xenocryst contamination in two volcanoes. The majority of dates obtained for caldera-forming eruptions coincide with glacial stages in accordance with the sediment record in the NW Pacific, suggesting an increase in explosive volcanic activity since the onset of the last glaciation 2.6 Ma. Rapid changes in ice volume during glacial times and the resulting fluctuation of glacial loading/unloading could have caused volatile saturation in shallow magma chambers and, in combination with availability of low-δ18O glacial meltwaters, increased the proportion of explosive vs effusive eruptions. The presented results provide new constraints on Pliocene–Pleistocene volcanic activity in Kamchatka, and thus constrain an important component of the Pacific Ring of Fire.
Bortnikova S.B., Bessonova E.P., Kotenko T. Trace Elements in Native Sulfur as Indicator of Substance Sources in Fumaroles of Active Volcanic Regions (Ebeco Volcano, Paramushir Island) // Proceedings World Geothermal Congress 2010. 2010.
Dirksen O.V., Bazanova L.I. An eruption of the Veer cone as a volcanic event during the increase of volcanic activity in Kamchatka at the beginning of the Christian Era // Journal of Volcanology and Seismology. 2010. Vol. 4. № 6. P. 378-384. doi: 10.1134/S0742046310060023.
   Аннотация
Tephrochronologic studies conducted in the Levaya Avacha River valley helped determine the true age of the Veer cinder cone, which formed approximately in 470 AD (1600 14C BP). These data refute the existing idea that it was generated in 1856. The monogenetic Veer cone should be cancelled from the catalogs of historical eruptions and active volcanoes in Kamchatka. The eruption of this cone was a reflection of the all-Kamchatkan increase in the activity of endogenous processes that occurred in 0–650 AD.
Fedotov S.A., Zharinov N.A., Gontovaya L.I. The magmatic system of the Klyuchevskaya group of volcanoes inferred from data on its eruptions, earthquakes, deformation, and deep structure // Journal of Volcanology and Seismology. 2010. Т. 4. № 1. С. 1-33. doi:10.1134/S074204631001001X.
   Аннотация
Abstract-The study of magmatic plumbing systems of volcanoes (roots of volcanoes) is one of the main tasks facing volcanology. One major object of this research is the Klyuchevskaya group of volcanoes (KGV), in Kamchatka, which is the greatest such group that has been found at any island arc and subduction zone. We summarize the comprehensive research that has been conducted there since 1931. Several conspicuous results derived since the 1960s have been reported, emerging from the study of magma sources, eruptions, earthquakes, deformation, and the deep structure for the KGV. Our discussion of these subjects incorporates the data of physical volcanology relating to the mechanism of volcanic activity and data from petrology as to magma generation. The following five parts can be distinguished in the KGV plumbing system and the associated geophysical model: the source of energy and material at the top of the Pacific Benioff zone at a depth of about 160 km, the region of magma ascent in the asthenosphere. the region of magma storage in the crust-mantle layer at depths of 40-25 km,
magma chambers and channelways in the crust, and the bases of volcanic edifices. We discuss and explain the properties of and the relationships between these parts and the mechanisms of volcanic activity and of the KGV plumbing system as they exist today. Methods for calculating magma chambers and conduits, the amount of magma in the system, and its other properties are available.