Lava production at Soufrière Hills Volcano, Montserrat: 1995–2009
Lava production at Soufrière Hills Volcano, Montserrat: 1995–2009
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蒙特塞拉特苏弗里耶尔山火山的熔岩产量：1995-2009
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
J. Komorowski
中科院分区：
文献类型：
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作者：
G. Wadge;R. Herd;G. Ryan;E. Calder;J. Komorowski
我们估计，从1995年到2009年，蒙特塞拉特苏弗里耶尔山火山产生了约1立方公里的安山质熔岩。有三个主要的挤出事件，每个持续约2至3.5年，并产生约280至340立方米的熔岩，和一个小插曲。我们的估算考虑了来自熔岩穹丘、火山碎屑流沉积物和空气降落沉积物的核心和岩屑组成部分的致密岩石等效体积贡献。到2005年，至少三分之二的喷发物质已经进入海洋。主要挤压事件的平均熔岩流量为3-5 m3 s −1，短周期（10-15天）脉冲高达10-20 m3 s −1。挤压的第一和第三集显示出类似的通量历史，表明系统的类似行为相隔十年。在每一幕结束时通量的减弱可能是由岩浆库中超压的下降造成的。
We estimate that about 1 km3 of andesitic lava has been produced at Soufrière Hills Volcano, Montserrat from 1995 to 2009. There were three major episodes of extrusion, each lasting about 2 to 3.5 years and producing about 280 to 340 M m3 of lava, and one minor episode. Our estimates account for the dense rock equivalent volumetric contributions from the core and talus components of the lava dome, pyroclastic flow deposits and air‐fall deposits. By 2005 at least two thirds of the erupted mass has already entered the sea. The average lava flux across the major extrusion episodes has been 3–5 m3s−1, with short‐period (10–15 days) pulses up to 10–20 m3s−1. The first and third episodes of extrusion show similar flux histories suggesting similar behaviour of the system ten years apart. Waning flux towards the end of each episode may be caused by declining overpressure in the magma reservoir.