气候变化领域集成服务门户(CCPortal): Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography

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DOI	10.1029/2019JB018900
	Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography
	Green R.G.; Sens-Schönfelder C.; Shapiro N.; Koulakov I.; Tilmann F.; Dreiling J.; Luehr B.; Jakovlev A.; Abkadyrov I.; Droznin D.; Gordeev E.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	The Klyuchevskoy Volcanic Group is a cluster of the world's most active subduction volcanoes, situated on the Kamchatka Peninsula, Russia. The volcanoes lie in an unusual off-arc position within the Central Kamchatka Depression (CKD), a large sedimentary basin whose origin is not fully understood. Many gaps also remain in the knowledge of the crustal magmatic plumbing system of these volcanoes. We conducted an ambient noise surface wave tomography, to image the 3-D shear wave velocity structure of the Klyuchevskoy Volcanic Group and CKD within the surrounding region. Vertical component cross correlations of the continuous seismic noise are used to measure interstation Rayleigh wave group and phase traveltimes. We perform a two-step surface wave tomography to model the 3-D Vsv velocity structure. For each inversion stage we use a transdimensional Bayesian Monte Carlo approach, with coupled uncertainty propagation. This ensures that our model provides a reliable 3-D velocity image of the upper 15 km of the crust, as well as a robust assessment of the uncertainty in the observed structure. Beneath the active volcanoes, we image small slow velocity anomalies at depths of 2–5 km but find no evidence for magma storage regions deeper than 5 km—noting the 15 km depth limit of the model. We also map two clearly defined sedimentary layers within the CKD, revealing an extensive 8 km deep sedimentary accumulation. This volume of sediments is consistent with the possibility that the CKD was formed as an Eocene-Pliocene fore-arc regime, rather than by recent (<2 Ma) back-arc extension. © 2020. The Authors.
英文关键词	ambient noise; Bayesian; Central Kamchatka Depression; Klyuchevskoy; tomography; transdimensional
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187918
作者单位	Department of Geophysics, Helmholtzzentrum Potsdam, Deutsches GeoForschungsZentrum (GFZ), Potsdam, Germany; Institut de Sciences de la Terre, Université Grenoble Alpes, CNRS (UMR5275), Grenoble, France; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russian Federation; Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation; Department of Geology and Geophysics, Novosibirsk State University, Novosibirsk, Russian Federation; Institute for Geological Sciences, Freie Universität Berlin, Berlin, Germany; Institute of Volcanology and Seismology, FEB RAS, Petropavlovsk-Kamchatsky, Russian Federation; Kamchatka Branch of the Geophysical Service, Russian Academy of Sciences, Petropavlovsk-Kamchatsky, Russian Federation
推荐引用方式 GB/T 7714	Green R.G.,Sens-Schönfelder C.,Shapiro N.,et al. Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography[J],2020,125(3).
APA	Green R.G..,Sens-Schönfelder C..,Shapiro N..,Koulakov I..,Tilmann F..,...&Gordeev E..(2020).Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Green R.G.,et al."Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography".Journal of Geophysical Research: Solid Earth 125.3(2020).