DOI: 10.1002/2014GL060859
论文题名: Seismic evidence of a complex multi-lens melt reservoir beneath the 9° N Overlapping Spreading Center at the East Pacific Rise
作者: Arnulf A.F. ; Singh S.C. ; Pye J.W.
刊名: Geophysical Research Letters
ISSN: 0094-9820
EISSN: 1944-9551
出版年: 2014
卷: 41, 期: 17 起始页码: 6109
结束页码: 6115
语种: 英语
Scopus关键词: Tectonics
; Crustal structure
; East Pacific Rise
; Lower crust
; Seismic evidence
; Spreading ridge
; Stress regime
; Three-dimensional seismic reflection data
; Waveform inversion
; Seismology
; crustal structure
; data set
; lava
; lower crust
; seafloor
; seismic anisotropy
; seismic reflection
; three-dimensional modeling
; East Pacific Rise
; Pacific Ocean
英文摘要: The crustal structure at fast spreading ridges is characterized by the presence of an axial melt lens along a significant part of the ridge axis over a partially molten lower crust. Using three-dimensional seismic reflection data and waveform inversion, here we show the existence of two to three stacked melt lenses beneath both limbs of the 9°N overlapping spreading center on the East Pacific Rise, which we suggest are the source of the very evolved lavas locally observed on the seafloor. The melt lenses are 2-4 km wide and lie in a 900m depth range. We suggest that the presence of a complex multi-lens melt reservoir in the crust is due to the reduced ambient stress regime, hence cracking, resulting from the overlap of the two segments of the ridge, allowing melt to stay longer in the crust at different depths. © 2014. American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906795742&doi=10.1002%2f2014GL060859&partnerID=40&md5=41bbf88ccb77bcb45ca271c87e4bb644
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7084
Appears in Collections: 气候减缓与适应
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作者单位: Équipe de Géosciences Marines, Institut de Physique du Globe de Paris (CNRS, Paris Diderot, Sorbonne Paris Cité), Paris, France
Recommended Citation:
Arnulf A.F.,Singh S.C.,Pye J.W.. Seismic evidence of a complex multi-lens melt reservoir beneath the 9° N Overlapping Spreading Center at the East Pacific Rise[J]. Geophysical Research Letters,2014-01-01,41(17).