DOI: 10.1038/ngeo2041
论文题名: Frequency and magnitude of volcanic eruptions controlled by magma injection and buoyancy
作者: Caricchi L. ; Annen C. ; Blundy J. ; Simpson G. ; Pinel V.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 2 起始页码: 126
结束页码: 130
语种: 英语
Scopus关键词: buoyancy
; crust
; explosive volcanism
; magma
; mechanical property
; Monte Carlo analysis
; numerical model
; pressure gradient
; recurrence interval
; tectonics
; volcanic eruption
英文摘要: Super-eruptions are extremely rare events. Indeed, the global frequency of explosive volcanic eruptions is inversely proportional to the volume of magma released in a single event. The rate of magma supply, mechanical properties of the crust and magma, and tectonic regime are known to play a role in controlling eruption frequency and magnitude, but their relative contributions have not been quantified. Here we use a thermomechanical numerical model of magma injection into Earth's crust and Monte Carlo simulations to explore the factors controlling the recurrence rates of eruptions of different magnitudes. We find that the rate of magma supply to the upper crust controls the volume of a single eruption. The time interval between magma injections into the subvolcanic reservoir, at a constant magma-supply rate, determines the duration of the magmatic activity that precedes eruptions. Our simulations reproduce the observed relationship between eruption volume and magma chamber residence times and replicate the observed correlation between erupted volumes and caldera dimensions. We also find that magma buoyancy is key to triggering super-eruptions, whereas pressurization associated with magma injection is responsible for relatively small and frequent eruptions. Our findings help improve our ability to decipher the long-term activity patterns of volcanic systems. © 2014 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/106458
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: School of Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, United Kingdom; Section of Earth and Environmental Sciences, University of Geneva, rue des Maraîchers 13, Geneva CH-1205, Switzerland; ISTerre, Université de Savoie, IRD, CNRS, Campus Scientifique, Le Bourget du Lac F73376, France
Recommended Citation:
Caricchi L.,Annen C.,Blundy J.,et al. Frequency and magnitude of volcanic eruptions controlled by magma injection and buoyancy[J]. Nature Geoscience,2014-01-01,7(2)