DOI: 10.1002/2013GL058199
论文题名: Conditions and threshold for magma transfer in the layered upper crust: Insights from experimental models
作者: Ritter M.C. ; Acocella V. ; Ruch J. ; Philipp S.L.
刊名: Geophysical Research Letters
ISSN: 0094-8344
EISSN: 1944-8075
出版年: 2013
卷: 40, 期: 23 起始页码: 6043
结束页码: 6047
语种: 英语
英文关键词: dike
; elasticity
; layering
; modeling
; volcano
Scopus关键词: Active volcanoes
; Critical threshold
; Dike propagation
; Experimental models
; layering
; Naturally occurring
; Propagation velocities
; Velocity variations
; Computer simulation
; Elastic moduli
; Elasticity
; Models
; Rocks
; Volcanoes
; Levees
; dike
; experimental study
; host rock
; magma
; numerical model
; upper crust
; volcanic eruption
; volcano
; Young modulus
英文摘要: Magma transfer, i.e., dike propagation, is partly controlled by Young's modulus (elasticity) contrasts (ratio upper layer to lower layer modulus) in the host rock. Here we try to better constrain the elasticity contrasts controlling the propagation velocity of dikes and their arrest. We simulate dike propagation in layered elastic media with different elasticity contrasts. Salted gelatin and water represent host rock and magma, respectively. For common density ratios between magma and host rock (~1.1), velocity variations are observed and a critical threshold in the elasticity contrast between layers results in the Young's modulus ratio of 2.1 ± 0.6. Naturally occurring elasticity contrasts can be much higher than this experimental threshold, suggesting that dike arrest due to heterogeneous elastic host rock properties is more frequent than expected. Examples of recently deflected or stalled dikes inside volcanoes and the common presence of high-velocity bodies below volcanoes suggest that better defining elasticity contrasts below volcanoes helps in forecasting eruptions. Key Points Dike propagation through layered rock is simulated by analog gelatin models Dikes can be arrested by elasticity contrasts in the range of common values Model results are compared to examples from recently active volcanoes ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84888773707&doi=10.1002%2f2013GL058199&partnerID=40&md5=2c65c4424fa56b8ba57a075dfc6a6917
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5608
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Geoscience Centre, University of Göttingen, Göttingen, Germany
Recommended Citation:
Ritter M.C.,Acocella V.,Ruch J.,et al. Conditions and threshold for magma transfer in the layered upper crust: Insights from experimental models[J]. Geophysical Research Letters,2013-01-01,40(23).