气候变化领域集成服务门户(CCPortal): The Transcrustal Magma Reservoir Beneath Soufrière Hills Volcano; Montserrat: Insights From 3-D Geodetic Inversions

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DOI	10.1029/2020GL089239
	The Transcrustal Magma Reservoir Beneath Soufrière Hills Volcano; Montserrat: Insights From 3-D Geodetic Inversions
	Gottsmann J.; Flynn M.; Hickey J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	We invert intraeruptive ground displacements recorded between 2003 and 2005 on Montserrat to shed light on the magmatic plumbing system of Soufrière Hills Volcano. Incorporating 3-dimensional crustal mechanical and topographic data in a finite-element model, we show that the recorded displacements are best explained by a southeastward dipping (plunge angle of 9.3°) vertically extended triaxial ellipsoidal pressure source with semiaxes lengths of 1.9 and 2.0 km horizontally, and 5.0 km vertically. The source is centered at 9.35 km depth below main sea level and embedded in independently imaged anomalously weak crustal rocks. The source orientation appears to be controlled by the local stress field at the intersection of two major WNW-ESE and NW-SE striking tectonic lineaments. We derive an average volumetric strain rate of 8.4 × 10−12 s−1 by transcrustal pressurization which may have contributed to flank instability and mass wasting events in the southern and eastern sectors of the island. © 2020. The Authors.
英文关键词	Sea level; Volcanoes; Flank instability; Ground displacement; Magma reservoirs; Magmatic plumbing system; Mass-wasting events; Source orientations; Tectonic lineaments; Volumetric strain; Strain rate; crustal movement; displacement; finite element method; lineament; magma; mass wasting; strain rate; stress field; three-dimensional modeling; topography; Leeward Islands [Lesser Antilles]; Montserrat
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/169563
作者单位	School of Earth Sciences, University of Bristol, Bristol, United Kingdom; Camborne School of Mines, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Gottsmann J.,Flynn M.,Hickey J.. The Transcrustal Magma Reservoir Beneath Soufrière Hills Volcano; Montserrat: Insights From 3-D Geodetic Inversions[J],2020,47(20).
APA	Gottsmann J.,Flynn M.,&Hickey J..(2020).The Transcrustal Magma Reservoir Beneath Soufrière Hills Volcano; Montserrat: Insights From 3-D Geodetic Inversions.Geophysical Research Letters,47(20).
MLA	Gottsmann J.,et al."The Transcrustal Magma Reservoir Beneath Soufrière Hills Volcano; Montserrat: Insights From 3-D Geodetic Inversions".Geophysical Research Letters 47.20(2020).