DOI: 10.1002/2013GL058813
论文题名: Cointrusive shear displacement by sill intrusion in a detachment: A numerical approach
作者: Chaput M. ; Pinel V. ; Famin V. ; Michon L. ; Froger J.-L.
刊名: Geophysical Research Letters
ISSN: 0094-10229
EISSN: 1944-9960
出版年: 2014
卷: 41, 期: 6 起始页码: 1937
结束页码: 1943
语种: 英语
英文关键词: detachment
; flank sliding
; La Réunion
; numerical modeling
; sill
Scopus关键词: Numerical models
; Volcanoes
; detachment
; flank sliding
; Numerical approaches
; Piton de La Fournaise
; Pressurized fluids
; Shear displacement
; sill
; Tangential displacements
; Buildings
; collapse
; detachment fault
; displacement
; emplacement
; friction
; numerical model
; shear
; sill
; sliding
; volcanic eruption
; volcanology
; Mascarene Islands
; Piton des Neiges
; Reunion
英文摘要: Sheared sills are observed at Piton des Neiges (the eroded basaltic volcano of La Réunion) and are a suspected cause of the coeruptive flank displacement of Piton de la Fournaise in 2007. We performed a 2-D numerical study to quantify the perturbation induced by sill injection within a volcanic edifice. Magma is considered as an inviscid and pressurized fluid injected in an initially stable edifice under gravity-controlled extension. Two cases of injection are tested, in an elastic homogeneous edifice or along a detachment controlled by a friction law. We show that sill injection induces tangential displacements. This effect is strongly increased when sills are emplaced along a detachment, producing extension behind the injection and potentially ending in a large-scale flank collapse. Sill injections can thus explain the cointrusive shear deformation observed at Piton des Neiges and the tangential displacements measured at Piton de la Fournaise in 2007. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896553349&doi=10.1002%2f2013GL058813&partnerID=40&md5=4cfc2d5d98a12bb08e67da19d939a9b6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7493
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire GéoSciences Réunion, Université de la Réunion, Institut de Physique du Globe de Paris, Saint-Denis, France
Recommended Citation:
Chaput M.,Pinel V.,Famin V.,et al. Cointrusive shear displacement by sill intrusion in a detachment: A numerical approach[J]. Geophysical Research Letters,2014-01-01,41(6).