DOI: 10.1038/ngeo2658
论文题名: The lateral extent of volcanic interactions during unrest and eruption
作者: Biggs J. ; Robertson E. ; Cashman K.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 4 起始页码: 308
结束页码: 311
语种: 英语
Scopus关键词: deformation mechanism
; dike
; magma chamber
; satellite data
; subduction
; synthetic aperture radar
; tectonic setting
; volcanic eruption
; volcanism
; Afar
; Alaska
; Chile
; Hawaiian Islands
; Iceland
; New Zealand
; United States
英文摘要: Volcanic eruptions often occur simultaneously or tap multiple magma reservoirs. Such lateral interactions between magmatic systems are attributed to stress changes or hydraulic connections but the precise conditions under which coupled eruptions occur have yet to be quantified. Here we use interferometric synthetic aperture radar satellite data to analyse the surface deformation generated by volcanic unrest in the Kenyan Rift. We identify several magma sources located at depths of 2-5 km; importantly, sources that are spaced less than about 10 km apart interact, whereas those spaced more than about 25 km apart do not. However, volcanoes up to 25 km apart have interacted in the geologic past. Thus, volcanic coupling is not simply controlled by the distance between the magma reservoirs. We then consider different tectonic settings globally, including intraplate volcanoes such as Hawaii and Yellowstone, arc volcanism in Alaska and Chile, and other rift settings, such as New Zealand, Iceland and Afar. We find that the most closely spaced magmatic interactions are controlled by the extent of a shallow crystal mush layer, stress changes can couple large eruptions over distances of about 20-40 km, and only large dyke intrusions or subduction earthquakes could generate coupled eruptions over distances of about 50-100 km. © 2016 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106036
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: Centre for the Observation and Modelling of Earthquakes and Tectonics, School of Earth Sciences, University of Bristol, Wills Memorial Building, Bristol, United Kingdom
Recommended Citation:
Biggs J.,Robertson E.,Cashman K.. The lateral extent of volcanic interactions during unrest and eruption[J]. Nature Geoscience,2016-01-01,9(4)