期刊
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷 15, 期 11, 页码 4481-4506出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014GC005529
关键词
-
资金
- EC [282769]
- Natural Environment Research Council [come30001, NE/J02483X/1] Funding Source: researchfish
- NERC [come30001, NE/J02483X/1] Funding Source: UKRI
The estimation of the magma ascent rate is key to predicting volcanic activity and relies on the understanding of how strongly the ascent rate is controlled by different magmatic parameters. Linking potential changes of such parameters to monitoring data is an essential step to be able to use these data as a predictive tool. We present the results of a suite of conduit flow models Soufriere that assess the influence of individual model parameters such as the magmatic water content, temperature or bulk magma composition on the magma flow in the conduit during an extrusive dome eruption. By systematically varying these parameters we assess their relative importance to changes in ascent rate. We show that variability in the rate of low frequency seismicity, assumed to correlate directly with the rate of magma movement, can be used as an indicator for changes in ascent rate and, therefore, eruptive activity. The results indicate that conduit diameter and excess pressure in the magma chamber are amongst the dominant controlling variables, but the single most important parameter is the volatile content (assumed as only water). Modeling this parameter in the range of reported values causes changes in the calculated ascent velocities of up to 800%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据