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  • 1
    Electronic Resource
    Electronic Resource
    Large debris avalanches and associated eruptions in the Holocene eruptive history of Shiveluch Volcano, Kamchatka, Russia (1998)
    Springer
    Bulletin of volcanology 59 (1998), S. 490-505 
    Details
    ISSN: 1432-0819
    Keywords: Key words Volcanic debris avalanches ; Repetitive flank failures ; Shiveluch Volcano ; Tephrochronology ; Radiocarbon dating ; Kamchatka ; Russia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Shiveluch Volcano, located in the Central Kamchatka Depression, has experienced multiple flank failures during its lifetime, most recently in 1964. The overlapping deposits of at least 13 large Holocene debris avalanches cover an area of approximately 200 km2 of the southern sector of the volcano. Deposits of two debris avalanches associated with flank extrusive domes are, in addition, located on its western slope. The maximum travel distance of individual Holocene avalanches exceeds 20 km, and their volumes reach ∼3 km3. The deposits of most avalanches typically have a hummocky surface, are poorly sorted and graded, and contain angular heterogeneous rock fragments of various sizes surrounded by coarse to fine matrix. The deposits differ in color, indicating different sources on the edifice. Tephrochronological and radiocarbon dating of the avalanches shows that the first large Holocene avalanches were emplaced approximately 4530–4350 BC. From ∼2490 BC at least 13 avalanches occurred after intervals of 30–900 years. Six large avalanches were emplaced between 120 and 970 AD, with recurrence intervals of 30–340 years. All the debris avalanches were followed by eruptions that produced various types of pyroclastic deposits. Features of some surge deposits suggest that they might have originated as a result of directed blasts triggered by rockslides. Most avalanche deposits are composed of fresh andesitic rocks of extrusive domes, so the avalanches might have resulted from the high magma supply rate and the repetitive formation of the domes. No trace of the 1854 summit failure mentioned in historical records has been found beyond 8 km from the crater; perhaps witnesses exaggerated or misinterpreted the events.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004450050206
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    Paper (German National Licenses)
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  • 2
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    Tephra from andesitic Shiveluch volcano, Kamchatka, NW Pacific: chronology of explosive eruptions and geochemical fingerprinting of volcanic glass (2015)
    Springer
    In:  International Journal of Earth Sciences, 104 (5). pp. 1459-1482.
    Details
    Publication Date: 2017-05-23
    Description: The ~16-ka-long record of explosive eruptions from Shiveluch volcano (Kamchatka, NW Pacific) is refined using geochemical fingerprinting of tephra and radiocarbon ages. Volcanic glass from 77 prominent Holocene tephras and four Late Glacial tephra packages was analyzed by electron microprobe. Eruption ages were estimated using 113 radiocarbon dates for proximal tephra sequence. These radiocarbon dates were combined with 76 dates for regional Kamchatka marker tephra layers into a single Bayesian framework taking into account the stratigraphic ordering within and between the sites. As a result, we report ~1,700 high-quality glass analyses from Late Glacial–Holocene Shiveluch eruptions of known ages. These define the magmatic evolution of the volcano and provide a reference for correlations with distal fall deposits. Shiveluch tephras represent two major types of magmas, which have been feeding the volcano during the Late Glacial–Holocene time: Baidarny basaltic andesites and Young Shiveluch andesites. Baidarny tephras erupted mostly during the Late Glacial time (~16–12.8 ka BP) but persisted into the Holocene as subordinate admixture to the prevailing Young Shiveluch andesitic tephras (~12.7 ka BP–present). Baidarny basaltic andesite tephras have trachyandesite and trachydacite (SiO2 〈 71.5 wt%) glasses. The Young Shiveluch andesite tephras have rhyolitic glasses (SiO2 〉 71.5 wt%). Strongly calc-alkaline medium-K characteristics of Shiveluch volcanic glasses along with moderate Cl, CaO and low P2O5 contents permit reliable discrimination of Shiveluch tephras from the majority of other large Holocene tephras of Kamchatka. The Young Shiveluch glasses exhibit wave-like variations in SiO2 contents through time that may reflect alternating periods of high and low frequency/volume of magma supply to deep magma reservoirs beneath the volcano. The compositional variability of Shiveluch glass allows geochemical fingerprinting of individual Shiveluch tephra layers which along with age estimates facilitates their use as a dating tool in paleovolcanological, paleoseismological, paleoenvironmental and archeological studies. Electronic tables accompanying this work offer a tool for statistical correlation of unknown tephras with proximal Shiveluch units taking into account sectors of actual tephra dispersal, eruption size and expected age. Several examples illustrate the effectiveness of the new database. The data are used to assign a few previously enigmatic wide-spread tephras to particular Shiveluch eruptions. Our finding of Shiveluch tephras in sediment cores in the Bering Sea at a distance of ~600 km from the source permits re-assessment of the maximum dispersal distances for Shiveluch tephras and provides links between terrestrial and marine paleoenvironmental records.
    Type: Article , PeerReviewed
    Format: text
    Format: archive
    Format: text
    DOI: 10.1007/s00531-015-1156-4
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    TephraKam: geochemical database of glass compositions in tephra and welded tuffs from the Kamchatka volcanic arc (northwestern Pacific) (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2023-02-08
    Description: Tephra layers produced by volcanic eruptions are widely used for correlation and dating of various deposits and landforms, for synchronization of disparate paleoenvironmental archives, and for reconstruction of magma origin. Here we present our original database TephraKam, which includes chemical compositions of volcanic glass in tephra and welded tuffs from the Kamchatka volcanic arc. The database contains 7049 major element analyses obtained by electron microprobe and 738 trace element analyses obtained by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) on 487 samples collected in proximity of their volcanic sources in all volcanic zones in Kamchatka. The samples characterize about 300 explosive eruptions, which occurred in Kamchatka from the Pliocene until historic times. Precise or estimated ages for all samples are based on published 39Ar/40Ar dates of rocks and 14C dates of host sediments, statistical age modelling and geologic relationships with dated units. All data in TephraKam is supported by information about source volcanoes and analytical details. Using the data, we present an overview of geochemical variations of Kamchatka volcanic glasses and discuss application of this data for precise identification of tephra layers, their source volcanoes, temporal and spatial geochemical variations of pyroclastic rocks in Kamchatka.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    The first continuous late Pleistocene tephra record from Kamchatka Peninsula (NW Pacific) and its volcanological and paleogeographic implications (2021)
    Elsevier
    Details
    Publication Date: 2024-02-07
    Description: Highlights • First continuous MIS 2 explosive eruptions record from the Kamchatka volcanic arc. • 25 major tephra markers with a potential for regional and hemispheric correlations. • The largest (M ≥ 6.5) eruption originated from the Gorely eruptive center ∼28 ka BP. • The high quality geochemical data for over 70 tephra layers. • A newly proposed large glacial paleolake system in the Central Kamchatka Depression. Abstract The Kamchatka volcanic arc (NW Pacific) is one of the most productive arcs in the world, known for its highly explosive activity. At the same time, the Kamchatkan record of late Pleistocene explosive eruptions has remained fragmentary. Here we present the first continuous record of Kamchatkan explosive activity between ∼12 and 30 ka, which includes ∼70 eruptions and extends the earlier reconstructed Holocene sequence for another 20 ka. Our record is based on geochemical correlations of 14C-dated tephras that represent all Kamchatka volcanic zones and are buried in lacustrine deposits along the 200 km stretch of the Central Kamchatka Depression (CKD). The accompanying geochemical database of volcanic glass compositions includes 3104 new electron microprobe and 221 LA-ICP-MS analyses. The data show that during the period under study, large silicic explosive eruptions peaked at 30–25 ka. Later times were mostly associated with moderate activity from northern CKD volcanoes Shiveluch and Zarechny. Our tephra record provides the first tephrochronological model for dating and correlating Central Kamchatka late Pleistocene deposits and gives us some insight into the timing of glacial advances in the Kliuchevskoi volcanic group and volcanic response to the onset of the Last Glacial Maximum and glacial unloading at its termination. In addition, studied sections of lacustrine deposits tightly linked by tephra markers suggest the existence of a large lake system within the CKD for ∼20 kyr until its final discharge at ∼12 ka BP.
    Type: Article , PeerReviewed
    Format: text
    Format: archive
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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