DOI: 10.1038/ngeo2952
论文题名: Deep and shallow long-period volcanic seismicity linked by fluid-pressure transfer
作者: Shapiro N.M. ; Droznin D.V. ; Droznina S.Ya. ; Senyukov S.L. ; Gusev A.A. ; Gordeev E.I.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 6 起始页码: 442
结束页码: 445
语种: 英语
Scopus关键词: fluid pressure
; lower crust
; magmatic differentiation
; mantle
; mass transport
; reservoir
; seismicity
; volcanic eruption
; volcano
; Kamchatka
; Russian Federation
英文摘要: Volcanic long-period earthquakes are attributed to pressure fluctuations that result from unsteady mass transport in the plumbing system of volcanoes. Whereas most of the long-period seismicity is located close to the surface, the volcanic deep long-period earthquakes that occur in the lower crust and uppermost mantle reflect the activity in the deep parts of magmatic systems. Here, we present observations of long-period earthquakes that occurred in 2011-2012 within the Klyuchevskoy volcano group in Kamchatka, Russia. We show two distinct groups of long-period sources: Events that occurred just below the active volcanoes, and deep long-period events at depths of ∼30 km in the vicinity of a deep magmatic reservoir. We report systematic increases of the long-period seismicity levels prior to volcanic eruptions with the initial activation of the deep long-period sources that reflects pressurization of the deep reservoir and consequent transfer of the activity towards the surface. The relatively fast migration of the long-period activity suggests that a hydraulic connection is maintained between deep and shallow magmatic reservoirs. The reported observations provide evidence for the pre-eruptive reload of the shallow magmatic reservoirs from depth, and suggest that the deep long-period earthquakes could be used as a reliable early precursor of eruptions. © 2017 Macmillan Publishers Limited, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105763
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS (UMR7154), 1 rue Jussieu, Paris, Cedex 5, France; Institute of Volcanology and Seismology FEB RAS, 9 Piip Boulevard, Petropavlovsk-Kamchatsky, Kamchatsky Region, Russian Federation; Kamchatka Branch of the Geophysical Survey, Russian Academy of Sciences, 9 Piip Boulevard, Petropavlovsk-Kamchatsky, Kamchatsky Region, Russian Federation
Recommended Citation:
Shapiro N.M.,Droznin D.V.,Droznina S.Ya.,et al. Deep and shallow long-period volcanic seismicity linked by fluid-pressure transfer[J]. Nature Geoscience,2017-01-01,10(6)