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首页> 外文期刊>Geophysical Research Letters >Voluminous eruption from a zoned magma body after an increase in supply rate at Axial Seamount
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Voluminous eruption from a zoned magma body after an increase in supply rate at Axial Seamount

机译：在轴向海山的补给量增加后，从一个分区的岩浆体中大量喷发

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摘要

Axial Seamount is the best monitored submarine volcano in the world, providing an exceptional window into the dynamic interactions between magma storage, transport, and eruption processes in a mid-ocean ridge setting. An eruption in April 2015 produced the largest volume of erupted lava since monitoring and mapping began in the mid-1980s after the shortest repose time, due to a recent increase in magma supply. The higher rate of magma replenishment since 2011 resulted in the eruption of the most mafic lava in the last 500-600years. Eruptive fissures at the volcano summit produced pyroclastic ash that was deposited over an area of at least 8km(2). A systematic spatial distribution of compositions is consistent with a single dike tapping different parts of a thermally and chemically zoned magma reservoir that can be directly related to previous multichannel seismic-imaging results.
机译：轴向海山是世界上受监视程度最好的海底火山，它为了解洋中脊环境中岩浆的储存，运输和喷发过程之间的动态相互作用提供了绝佳的窗口。由于最近岩浆供应增加，自最短的安息时间后的1980年代中期开始监测和制图以来，2015年4月的一次喷发产生了最大量的熔岩喷发。自2011年以来，较高的岩浆补给速度导致了过去500-600年中最镁铁质熔岩的喷发。火山顶峰的喷发裂隙产生了火山碎屑，这些碎屑沉积在至少8km（2）的区域内。成分的系统性空间分布与单个堤坝对热和化学分区的岩浆储层不同部位的挖掘一致，该岩浆储层可以与先前的多通道地震成像结果直接相关。

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