气候变化领域集成服务门户(CCPortal): The Prevalence and Significance of Offset Magma Reservoirs at Arc Volcanoes

CCPortal

DOI	10.1029/2020GL087856
	The Prevalence and Significance of Offset Magma Reservoirs at Arc Volcanoes
	Lerner A.H.; O'Hara D.; Karlstrom L.; Ebmeier S.K.; Anderson K.R.; Hurwitz S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Determining the spatial relations between volcanic edifices and their underlying magma storage zones is fundamental for characterizing long-term evolution and short-term unrest. We compile centroid locations of upper crustal magma reservoirs at 56 arc volcanoes inferred from seismic, magnetotelluric, and geodetic studies. We show that magma reservoirs are often horizontally offset from their associated volcanic edifices by multiple kilometers, and the degree of offset broadly scales with reservoir depth. Approximately 20% of inferred magma reservoir centroids occur outside of the overlying volcano's mean radius. Furthermore, reservoir offset is inversely correlated with edifice size. Taking edifice volume as a proxy for long-term magmatic flux, we suggest that high flux or prolonged magmatism leads to more centralized magma storage beneath arc volcanoes by overprinting upper crustal heterogeneities that would otherwise affect magma ascent. Edifice volumes therefore reflect the spatial distribution of underlying magma storage, which could help guide monitoring strategies at volcanoes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Buildings; Long Term Evolution (LTE); Arc volcanoes; Magma ascents; Magma reservoirs; Magma storage; Monitoring strategy; Short term; Spatial relations; Volcanic edifice; Volcanoes; centroid moment tensor; heterogeneity; magma chamber; magmatism; spatial analysis; upper crust; volcanic arc
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/170137
作者单位	Department of Earth Sciences, University of Oregon, Eugene, OR, United States; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; U.S. Geological Survey, Moffett Field, CA, United States
推荐引用方式 GB/T 7714	Lerner A.H.,O'Hara D.,Karlstrom L.,et al. The Prevalence and Significance of Offset Magma Reservoirs at Arc Volcanoes[J],2020,47(14).
APA	Lerner A.H.,O'Hara D.,Karlstrom L.,Ebmeier S.K.,Anderson K.R.,&Hurwitz S..(2020).The Prevalence and Significance of Offset Magma Reservoirs at Arc Volcanoes.Geophysical Research Letters,47(14).
MLA	Lerner A.H.,et al."The Prevalence and Significance of Offset Magma Reservoirs at Arc Volcanoes".Geophysical Research Letters 47.14(2020).