Explosive or effusive style of volcanic eruption determined by magma storage conditions
Explosive or effusive style of volcanic eruption determined by magma storage conditions
复制标题
由岩浆储存条件决定的火山喷发的爆发式或喷发式
DOI:
10.1038/s41561
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发表时间:
2021
影响因子:
18.3
通讯作者:
Huber, C
中科院分区:
文献类型:
--
作者:
Popa, Razvan-Gabriel;Bachmann, O.;Huber, C
Most volcanoes erupt both effusively and explosively, with explosive behaviour being responsible for most human fatalities. Eruption style is thought to be strongly controlled by fast conduit processes, limiting our ability for prediction. Here we address a critical question in the quest to develop timely forecasting of eruptive behaviour: are there conditions in which the outcome of an eruption is predetermined by the state of the magma in the subvolcanic reservoir? We analyse the pre-eruptive storage conditions of 245 units from volcanoes around the world. We show that pre-eruptive crystallinity, dissolved water content and the presence of exsolved volatiles in the chamber exert a primary control on eruptive styles. Magmas erupt explosively over a well-defined range in dissolved water content (~4–5.5 wt%) and crystallinity (less than 30 vol%). All other conditions, namely higher crystallinity, dissolved water contents below 3.5 wt% and, counterintuitively, in excess of 5.5 wt%, favour effusive activity. Between these ranges, there is a narrow field of transitional storage properties that do not discriminate between eruptive styles, and where the conduit exerts the main control on eruptive behaviour. Our findings suggest that better estimates of crystallinity and water content in subvolcanic chambers are key to forecasting eruptive style.
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DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
R. Popa;P. Tollan;O. Bachmann;V. Schenker;B. Ellis;J. Allaz
通讯作者:
J. Allaz
影响因子:
3.7
作者:
L. Mastin;E. Roeloffs;N. Beeler;J. E. Quick
通讯作者:
J. E. Quick
影响因子:
2.9
作者:
A. Koleszar;A. Kent;P. Wallace;W. Scott
通讯作者:
W. Scott
DOI:
10.1029/2005eo370001
发表时间:
2005
期刊:
Eos, Transactions American Geophysical Union
影响因子:
--
作者:
M. Polacci;M. Rosi;P. Landi;A. D. Muro;P. Papale
通讯作者:
P. Papale
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
Mauro Rosi;Patrizia Landi;M. Polacci;A. D. Muro;D. Zandomeneghi
通讯作者:
D. Zandomeneghi