Вулкан Ксудач. Библиография
Записей: 77
Страницы:  1 2 3 4 5 6 7 8
Dirksen O., van den Bogaard C., Danhara T., Diekmann B. Tephrochronological investigation at Dvuh-yurtochnoe lake area, Kamchatka: Numerous landslides and lake tsunami, and their environmental impacts // Quaternary International. 2011. V. 246. № 1-2. P. 298 - 311. doi: 10.1016/j.quaint.2011.08.032.    Аннотация
Distal volcanic tephras in soil sections and lake sediments in the Dvuh-yurtochnoe (Two-Yurts) lake area, central Kamchatka, were investigated in order to provide a chronological framework for the reconstruction of late Quaternary landscape development. Mineralogical and geochemical data point to sources from 5 volcanoes. Ten tephra layers were identified and correlated to known eruptive events. The ages were corroborated by radiocarbon dating of the soil sections around Two-Yurts lake. These findings allow the reconstruction of regional paleoenvironmental change, recorded in the soil sections around Two-Yurts lake. During the Last Glacial Maximum (LGM) time, the area was affected by glacial advances that produced the glacial moraines at the eastern outlet of the lake. A large landslide, ca. 15,000–18,000 14C BP, dammed the valley and led to formation of Two-Yurts lake. Several more landslide events can be recognized in the Holocene, and one affected Two-Yurts lake ca. 3000 14C BP. This event produced a “tsunami”, documented by poorly sorted deposits with rounded pebbles in the onshore sections around the lake. In contrast to the soil sections, tephras buried in the “soupy” lacustrine sediments of Two-Yurts lake are not well preserved and show inconsistent age-depth relationships compared to those suggested by radiocarbon dating, due to sinking through the lake sediments. Nevertheless, tephrochronological data revealed the strong impact of terrestrial landslides on lake sedimentation.
Ditmar von Karl Reisen und Aufenthalt in Kamtschatka in den Jahren 1851–1855. Erster Teil. Historischer Bericht nach den Tagebüchern. 1890.    Аннотация
Der Geologe Karl von Ditmar erkundete von 1851 bis 1855 im Auftrag der russischen Regierung die Bodenschätze Kamčatkas. Dabei erforschte er das Land und seine Bevölkerung aber weit über diesen Autrag hinaus, was seine eindrucksvollen Reisebeschreibungen zeigen. So verbrachte er im Sommer 1853 als erster Forscher längere Zeit bei den Korjaken auf der Halbinsel Tajgonos. Der 1890 erschienene erste Teil seines Werkes enthält den ausführlichen Bericht seiner Reise nach den Tagebüchern, ein getrennt erscheinender zweiter Teil die systematische Darstellung der Natur und der Geschichte Kamčatkas.
Ditmar von Karl Reisen und Aufenthalt in Kamtschatka in den Jahren 1851–1855. Zweiter Teil. Allgemeines über Kamtschatka. 1900. 273 p.    Аннотация
Der Geologe Karl von Ditmar erkundete von 1851 bis 1855 im Auftrag der russischen Regierung die Bodenschätze Kamčatkas. Dabei erforschte er das Land und seine Bevölkerung aber weit über diesen Autrag hinaus, was seine eindrucksvollen Reisebeschreibungen zeigen. So verbrachte er im Sommer 1853 als erster Forscher längere Zeit bei den Korjaken auf der Halbinsel Tajgonos. Der 1900 erschienene zweite Teil seines Werkes enthält die systematische Darstellung der Natur und der Geschichte Kamčatkas sowie ein geografisches Lexikon.
Girina O.A., Gordeev E.I., Melnikov D.V., Manevich A.G., Nuzhdaev A.A., Romanova I.M. The 25 Anniversary Kamchatkan Volcanic Eruption Response Team // 10th Biennual workshop on Japan-Kamchatka-Alaska subduction processes (JKASP-2018). Petropavlovsk-Kamchatsky, Russia, August 20-26. Petropavlovsk-Kamchatsky: IVS FEB RAS. 2018. P. 80-82.
Gusev A.A., Ponomareva V.V., Braitseva O.A., Melekestsev I.V., Sulerzhitsky L.D. Great explosive eruptions on Kamchatka during the last 10,000 years: Self-similar irregularity of the output of volcanic products // Journal of Geophysical Research. 2003. V. 108. № B2. doi:10.1029/2001JB000312.    Аннотация
Temporal irregularity of the output of volcanic material is studied for the sequence of large (V ≥ 0.5 km3, N = 29) explosive eruptions on Kamchatka during the last 10,000 years. Informally, volcanic productivity looks episodic, and dates of eruptions cluster. To investigate the probable self-similar clustering behavior of eruption times, we determine correlation dimension Dc. For intervals between events 800 and 10,000 years, Dc ≈ 1 (no self-similar clustering). However, for shorter delays, Dc = 0.71, and the significance level for the hypothesis Dc < 1 is 2.5%. For the temporal structure of the output of volcanic products (i.e., for the sequence of variable-weight points), a self-similar “episodic” behavior holds over the entire range of delays 100–10,000 years, with Dc = 0.67 (Dc < 1 at 3.4% significance). This behavior is produced partly by the mentioned common clustering of event dates, and partly by another specific property of the event sequence, that we call “order clustering”. This kind of clustering is a property of a time-ordered list of eruptions, and is manifested as the tendency of the largest eruptions (as opposed to smaller ones) to be close neighbors in this list. Another statistical technique, of “rescaled range” (R/S), confirms these results. Similar but weaker-expressed behavior was also found for two other data sets: historical Kamchatka eruptions and acid layers in Greenland ice column. The episodic multiscaled mode of the output of volcanic material may be a characteristic property of a sequence of eruptions in an island arc, with important consequences for climate forcing by volcanic aerosol, and volcanic hazard.
Hoff U., Dirksen O., Dirksen V., Herzschuh U., Hubberten H.-W., Meyer H., van den Bogaard C., Diekmann B. Late Holocene diatom assemblages in a lake-sediment core from Central Kamchatka, Russia // Journal of Paleolimnology. 2012. V. 47. V. 4. P. 549-560. doi: 10.1007/s10933-012-9580-y.    Аннотация
Fossil diatom assemblages in a sediment core from a small lake in Central Kamchatka (Russia) were used to reconstruct palaeoenvironmental conditions of the late Holocene. The waterbody may be a kettle lake that formed on a moraine of the Two-Yurts Lake Valley, located on the eastern slope of the Central Kamchatka Mountain Chain. At present, it is a seepage lake with no surficial outflow. Fossil diatom assemblages show an almost constant ratio between planktonic and periphytic forms throughout the record. Downcore variations in the relative abundances of diatom species enabled division of the core into four diatom assemblage zones, mainly related to changes in abundances of Aulacoseira subarctica, Stephanodiscus minutulus, and Discostella pseudostelligera and several benthic species. Associated variations in the composition and content of organic matter are consistent with the diatom stratigraphy. The oldest recovered sediments date to about 3220 BC. They lie below a sedimentation hiatus and likely include reworked deposits from nearby Two-Yurts Lake. The initial lake stage between 870 and 400 BC was characterized by acidic shallow-water conditions. Between 400 BC and AD 1400, lacustrine conditions were established, with highest contributions from planktonic diatoms. The interval between AD 1400 and 1900 might reflect summer cooling during the Little Ice Age, indicated by diatoms that prefer strong turbulence, nutrient recycling and cooler summer conditions. The timing of palaeolimnological changes generally fits the pattern of neoglacial cooling during the late Holocene on Kamchatka and in the neighbouring Sea of Okhotsk, mainly driven by the prevailing modes of regional atmospheric circulation.
Holocene Volcanoes in Kamchatka. 2002.
Kyle Philip R., Ponomareva Vera V., Rourke Schluep Rachelle Geochemical characterization of marker tephra layers from major Holocene eruptions, Kamchatka Peninsula, Russia // International Geology Review. 2011. V. 53. № 9. P. 1059-1097. doi:10.1080/00206810903442162.    Аннотация
Kamchatka Peninsula is one of the most active volcanic regions in the world. Many Holocene explosive eruptions have resulted in widespread dispersal of tephra-fall
deposits. The largest layers have been mapped and dated by the 14C method. The tephra provide valuable stratigraphic markers that constrain the age of many geological
events (e.g. volcanic eruptions, palaeotsunamis, faulting, and so on). This is the first systematic attempt to use electron microprobe (EMP) analyses of glass to characterize
individual tephra deposits in Kamchatka. Eighty-nine glass samples erupted from 11 volcanoes, representing 27 well-identified Holocene key-marker tephra layers, were analysed. The glass is rhyolitic in 21 tephra, dacitic in two, and multimodal in three.
Two tephra are mixed with glass compositions ranging from andesite/dacite to rhyolite. Tephra from the 11 eruptive centres are distinguished by their glass K2O,
CaO, and FeO contents. In some cases, individual tephra from volcanoes with multiple eruptions cannot be differentiated. Trace element compositions of 64 representative
bulk tephra samples erupted from 10 volcanoes were analysed by instrumental neutron activation analysis (INAA) as a pilot study to further refine the geochemical haracteristics; tephra from these volcanoes can be characterized using Cr and Th contents and La/Yb ratios.
Unidentified tephra collected at the islands of Karaginsky (3), Bering (11), and Attu (5) as well as Uka Bay (1) were correlated to known eruptions. Glass compositions and
trace element data from bulk tephra samples show that the Karaginsky Island and Uka Bay tephra were all erupted from the Shiveluch volcano. The 11 Bering Island tephra
are correlated to Kamchatka eruptions. Five tephra from Attu Island in the Aleutians are tentatively correlated with eruptions from the Avachinsky and Shiveluch volcanoes.
Maximov A.P. Petrological constraints on the mechanisms of catastrophic explosive eruptions of andesitic and acid magmas // 7 th Biennual Workshop on Japan-Kamchatka-Alaska Subduction Processes: Mitigating Risk Through International Volcano, Earthquake, and Tsunami Science (JKASP-2011). August 25-30, 2011, Petropavlovsk-Kamchatsky. 2011. P. 257-258.
Melekestsev I.V., Braitseva O.A., Ponomareva V.V., Sulerzhitskiy L.D. Holocene catastrophic caldera-forming eruptions of Ksudach volcano, Kamchatka // Volcanology and Seismology. 1996. V. 17. № 4-5. P. 395-422.    Аннотация
Four Plinian eruptions of Ksudach have been reconstructed and dated by the carbon-14 method. The eruptions produced three collapse calderas: the KS1 eruption formed Caldera V 1700-1800 years ago, the KS2 and KS3 events produced Caldera IV 6000-6100 years ago, and the KS4 eruption formed Caldera III 8700-8800 years ago. The most violent eruption was the KS1 event. The sizes of the calderas were 4 × 6.5 km (V), 5 × 6 km (IV), and presumably 2-3 km across (III). Juvenile material was erupted in a rhythmic manner. The composition of the products was dominated by andesite (KS2 and KS4), dacite and rhyodacite (KS3), and rhyodacite (KS1). It is assumed that all caldera-forming eruptions were triggered by the injection of a new portion of high-temperature basic magma and its mixing with the cooling acid magma of the preexisting source. -from Journal summary

Реконструированы и датированы 14С-методом четыре плинианских извержения вулкана Ксудач, сформировавших три кальдеры обрушения: KCi и кальдеру V - 1700-1800 л. н.; КС2 + КС3 и кальдеру IV - 6000-6100 л. н.; КС4 и кальдеру III 8700-8800 л. н. Самым мощным было извержение KCi: 18-19 км3 пирокластики, высота эруптивной колонны до 23 км. Объем продуктов извержений КС2 + КС3 - 10-11 км3, КС4 - не менее 1,5-1,7 км3. Размеры кальдер: V - 4 X 6,5 км, IV - 5x6 км, поперечь III - предположительно 2-3 км. Вынос ювенильной пирокластики в ходе извержений было ритмичным. Каждый ритм начинался выбросом тефры, а завершался формированием пирокластических потоков. Состав продуктов варьировал от андезитов до риодацитов: КС2 и КС4 - преимущественно андезиты, КС3 - дациты и риодациты, KCi - риодацит. Предполагается, что "спусковой механизм" для начала всех кальдерообразующих извержений - внедрение свежей сильно нагретой магмы основного состава и смешение ее с остывающей кислой магмой существовавшего ранее очага. В соответствии со своими масштабами извержения должны были оказать влияние на климат и озоновый слой 3емли и найти отражение в виде кислотных пиков в Гренландском ледниковом щите.

Рекомендуемые браузеры для просмотра данного сайта: Google Chrome, Mozilla Firefox, Opera, Yandex. Использование другого браузера может повлечь некорректное отображение содержимого веб-страниц.
Условия использования материалов и сервисов Геопортала

Copyright © Институт вулканологии и сейсмологии ДВО РАН, 2010-2020. Пользовательское соглашение.
Любое использование либо копирование материалов или подборки материалов Геопортала может осуществляться лишь с разрешения правообладателя и только при наличии ссылки на geoportal.kscnet.ru
©Development&Design: roman@kscnet.ru