Submarine pyroclastic deposits formed at the Soufrière Hills volcano, Montserrat (1995–2003) : what happens when pyroclastic flows enter the ocean?
Submarine pyroclastic deposits formed at the Soufrière Hills volcano, Montserrat (1995–2003) : what happens when pyroclastic flows enter the ocean?
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蒙特塞拉特苏弗里耶尔山火山形成的海底火山碎屑沉积物（1995-2003）：当火山碎屑流进入海洋时会发生什么？
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
P. Talling
中科院分区：
文献类型：
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作者：
J. Trofimovs;L. Amy;G. Boudon;C. Deplus;E. E. Doyle;N. Fournier;M. Hart;J. Komorowski;A. Friant;E. J. Lock;C. Pudsey;G. Ryan;R. Sparks;P. Talling
西印度群岛蒙特塞拉特的苏弗里尔山火山自1995年开始喷发以来，经历了一系列的穹顶增长和坍塌事件。产生的火山碎屑物质有90%以上已经沉积到海洋中。对这些海底沉积物的采样显示，火山碎屑流在进入海洋时与水迅速而猛烈地混合。粗组分(鹅卵石到巨石)从致密的底部泥浆沉积到近端，形成陡峭的、近线性的山脊，然后插入形成海底扇形。更细的灰级成分被混合到上面的水柱中，形成浑浊的水流，流经距离污染源30公里的地方。蒙特塞拉特东岸的火山碎屑物质总量超过280×106m~3，其中65%沉积在近缘，35%以远端浊积岩的形式沉积。
The Soufriere Hills volcano, Montserrat, West Indies, has undergone a series of dome growth and collapse events since the eruption began in 1995. Over 90% of the pyroclastic material produced has been deposited into the ocean. Sampling of these submarine deposits reveals that the pyroclastic flows mix rapidly and violently with the water as they enter the sea. The coarse components (pebbles to boulders) are deposited proximally from dense basal slurries to form steep-sided, near-linear ridges that intercalate to form a submarine fan. The finer ash-grade components are mixed into the overlying water column to form turbidity currents that flow over distances >30 km from the source. The total volume of pyroclastic material off the east coast of Montserrat exceeds 280 × 106 m3, with 65% deposited in proximal lobes and 35% deposited as distal turbidites.