气候变化领域集成服务门户(CCPortal): Ps-P Tomography of a Midcrustal Magma Reservoir Beneath Cleveland Volcano; Alaska

CCPortal

DOI	10.1029/2020GL090406
	Ps-P Tomography of a Midcrustal Magma Reservoir Beneath Cleveland Volcano; Alaska
	Portner D.E.; Wagner L.S.; Janiszewski H.A.; Roman D.C.; Power J.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	Seismic tomography of the crust is an essential tool for studying the three-dimensional structure of magmatic plumbing systems feeding active volcanoes, but it is often limited in resolution by the absence of deep local seismicity. Teleseismic receiver functions can be used to illuminate local structural variations, but typically do not account for the effects of three-dimensional velocity heterogeneities. Here we harness the complementary strengths of both techniques by processing Ps-P delay times derived from teleseismic receiver functions in a tomographic S wave inversion. Using our inversion technique, we produce the first tomographic crustal velocity model beneath Cleveland Volcano, identifying a vertically extensive high VP/VS anomaly beneath the volcano that likely signifies a middle-to-lower crustal magma reservoir. The observation is the first of its kind in the central Aleutians, illustrating the potential of our technique to advance our understanding of crustal magmatic systems without broad seismic networks or distributed local seismicity. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Seismology; Shear waves; Inversion techniques; Magmatic plumbing system; Magmatic systems; Seismic tomography; Structural variations; Teleseismic receiver functions; Three-dimensional structure; Three-dimensional velocity; Volcanoes; detection method; instrumentation; reservoir; S-wave; seismic tomography; tomography; volcano; Alaska; Aleutian Islands; Chuginadak Island; Mount Cleveland; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169457
作者单位	Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC, United States; Department of Earth Sciences, University of Hawai'i at Mānoa, Honolulu, HI, United States; Alaska Volcano Observatory, U.S. Geological Survey, Anchorage, AK, United States
推荐引用方式 GB/T 7714	Portner D.E.,Wagner L.S.,Janiszewski H.A.,et al. Ps-P Tomography of a Midcrustal Magma Reservoir Beneath Cleveland Volcano; Alaska[J],2020,47(22).
APA	Portner D.E.,Wagner L.S.,Janiszewski H.A.,Roman D.C.,&Power J.A..(2020).Ps-P Tomography of a Midcrustal Magma Reservoir Beneath Cleveland Volcano; Alaska.Geophysical Research Letters,47(22).
MLA	Portner D.E.,et al."Ps-P Tomography of a Midcrustal Magma Reservoir Beneath Cleveland Volcano; Alaska".Geophysical Research Letters 47.22(2020).