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首页> 外文期刊>Journal of Geodesy >Altimeter-derived marine gravity variations reveal the magma mass motions within the subaqueous Nishinoshima volcano, Izu-Bonin Arc, Japan
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Altimeter-derived marine gravity variations reveal the magma mass motions within the subaqueous Nishinoshima volcano, Izu-Bonin Arc, Japan

机译：高度计衍生的海洋重力变化揭示了日本Izu-Bonin arc的亚里南马火山岩浆内的岩浆群集运动

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摘要

Variations of marine gravity reflect mass changes in Earth's interior, including magma motions during volcanic eruption, which manifest in submarine mass transports. Absolute gravimeters have been used to detect and study evolutions of magma mass motions, however, only for land volcanoes. Here for the first time, we used radar altimeter-derived time-varying marine gravity fields, corresponding to before, during and after the Nishinoshima volcanic eruption, Izu-Bonin arcs near Japan, to quantify the evolution of undersea volcanic magma mass motions. The magma depths were observed to become shallower and 2 km, which are almost in exact accordance with seismic results. We find that the magma volume decreased beneath the Nishinoshima volcano, while increased or being fed by deeper reservoirs to the east and northeast of Nishinoshima. We conclude that the Nishinoshima volcano may continue to be active in the future. This study highlights the use of satellite radar altimetry as an innovative and viable tool to study subaqueous volcanism.
机译：海洋重力的变化反映了地球内部的质量变化，包括在火山喷发过程中的岩浆运动，这在潜艇大众运输中表现出来。绝对的重力计已被用于检测和研究岩浆质量运动的演变，但仅适用于陆地火山。在这里，我们首次使用雷达高度计衍生的时变海洋重力领域，对应于之前，期间和之后的南尼迦米莎火山爆发，在日本附近的Izu-bonin弧线，量化了海底火山岩岩浆肿块的演变。岩浆深度被观察到变浅和＆ 2公里，几乎完全按照地震结果。我们发现，岩浆体积下降在Nishinoshima火山下方，同时增加或由Nishinoshima的东部和东北地区的深层水库增加或被喂养。我们得出结论，Nishinoshima火山未来可能会继续积极活跃。本研究突出了卫星雷达Altimetry作为研究亚水上火山的创新和可行的工具。

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  • 来源
    《Journal of Geodesy》 |2021年第5期|46.1-46.14|共14页
  • 作者

    Li Qianqian; Bao Lifeng; Shum C. K.;

  • 作者单位

    Chinese Acad Sci Innovat Acad Precis Measurement Sci & Technol State Key Lab Geodesy & Earths Dynam Wuhan 430077 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Innovat Acad Precis Measurement Sci & Technol State Key Lab Geodesy & Earths Dynam Wuhan 430077 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Innovat Acad Precis Measurement Sci & Technol State Key Lab Geodesy & Earths Dynam Wuhan 430077 Peoples R China|Ohio State Univ Sch Earth Sci Div Geodet Sci Columbus OH 43210 USA;

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  • 正文语种 eng
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  • 关键词

    Satellite altimetry; Time variable gravity; Subaqueous volcano; Magma motions; Nishinoshima;

    机译：卫星高度偏移;时间可变重力;亚基火山;岩浆运动;南尼迦;

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