气候变化领域集成服务门户(CCPortal): Logarithmic Growth of Dikes From a Depressurizing Magma Chamber

CCPortal

DOI	10.1029/2019GL086230
	Logarithmic Growth of Dikes From a Depressurizing Magma Chamber
	Grossman-Ponemon B.E.; Heimisson E.R.; Lew A.J.; Segall P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Dike propagation is an intrinsically multiphase problem, where deformation and fluid flow are intricately coupled in a fracture process. Here we perform the first fully coupled simulations of dike propagation in two dimensions, accounting for depressurization of a circular magma chamber, dynamic fluid flow, fracture formation, and elastic deformation. Despite the complexity of the governing equations, we observe that the lengthening is well explained by a simple model a(t) = c1 log(1 + t/c2), where a is the dike length, t is time, and c1 and c2 are constants. We compare the model to seismic data from eight dikes in Iceland and Ethiopia, and, in spite of the assumption of plane strain, we find good agreement between the data and the model. In addition, we derive an approximate model for the depressurization of the chamber with the dike length. These models may help forecast the growth of lateral dikes and magma chamber depressurization. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Flow of fluids; Fracture; Hydraulic fracturing; Levees; Seismology; Strain; Approximate model; Depressurizations; Dike propagation; FEM simulations; Governing equations; Logarithmic growth; Magma chamber; Natural hazard; Hydraulic structures; complexity; dike; fluid flow; magma chamber; seismic data; simulation; volcanic eruption; Ethiopia; Iceland
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/170725
作者单位	Department of Mechanical Engineering, Stanford University, Stanford, CA, United States; Department of Geophysics, Stanford University, Stanford, CA, United States; Now at Seismological Laboratory, California Institute of Technology, Pasadena, CA, United States; Institute for Computational and Mathematical Engineering, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Grossman-Ponemon B.E.,Heimisson E.R.,Lew A.J.,et al. Logarithmic Growth of Dikes From a Depressurizing Magma Chamber[J],2020,47(4).
APA	Grossman-Ponemon B.E.,Heimisson E.R.,Lew A.J.,&Segall P..(2020).Logarithmic Growth of Dikes From a Depressurizing Magma Chamber.Geophysical Research Letters,47(4).
MLA	Grossman-Ponemon B.E.,et al."Logarithmic Growth of Dikes From a Depressurizing Magma Chamber".Geophysical Research Letters 47.4(2020).