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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Electrical conductivity, ground displacement, gravity changes, and gas flow at Solfatara crater (Campi Flegrei caldera, Italy): Results from numerical modeling
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Electrical conductivity, ground displacement, gravity changes, and gas flow at Solfatara crater (Campi Flegrei caldera, Italy): Results from numerical modeling

机译：Solfatara火山口（意大利Campi Flegrei火山口）的电导率，地面位移，重力变化和气流：数值模拟的结果

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摘要

Hydrothermal fluid circulation may cause measurable gravity changes and ground deformation. We extend our previous studies and increase the number of observable parameters to include gas temperature, the rate of diffuse degassing, the extent of the degassing area, and electrical conductivity. We have carried out simulations using TOUGH2/EOS2 of a large scale hydrothermal system, then we have calculated observables arising from changes in hydrothermal fluid circulation. Our results show that fluids affect many observable parameters generating detectable signals. However, a more detailed description of the shallow subsurface is necessary to properly calculate electrical conductivity. Studies at Solfatara volcano (Campi Flegrei caldera, Italy) highlight the presence of an unsaturated layer at depth and allow to determine the position of the water table. Then, we present results from a new, small scale simulation, focused on the crater, and carried out with a new, refined meshgrid taking into account the real topography. Aim of the work is to calculate a detailed electrical conductivity maD and reDroduce the main features of the Solfatara crater.
机译：热液循环可能导致可测量的重力变化和地面变形。我们扩展了以前的研究，并增加了可观察参数的数量，包括气体温度，扩散脱气率，脱气面积和电导率。我们已经使用TOUGH2 / EOS2对大型热液系统进行了模拟，然后我们计算了热液循环中变化产生的可观测值。我们的结果表明，流体会影响产生可检测信号的许多可观察参数。但是，需要对浅层次表面进行更详细的描述才能正确计算电导率。 Solfatara火山（意大利Campi Flegrei火山口）的研究突显了深处存在非饱和层，并可以确定地下水位。然后，我们提出了一个新的，小规模的模拟结果，重点放在了陨石坑上，并在考虑到实际地形的情况下，使用了一种新的，精炼的网格进行了研究。该工作的目的是计算详细的电导率maD并降低Solfatara火山口的主要特征。

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  • 来源
    《Journal of Volcanology and Geothermal Research》 |2011年第4期|p.93-105|共13页
  • 作者

    A.P. Rinaldi; M. Todesco; J. Vandemeulebrouck; A. Revil; M. Bonafede;

  • 作者单位

    Istituto Nazionale di Ceofiska e Vulcanologia, Sezione di Bologna, Italy,Dipartimento di Fisica, Settore Geofisica, Universita di Bologna, Italy;

    Istituto Nazionale di Ceofiska e Vulcanologia, Sezione di Bologna, Italy;

    INSU-CNRS LOT, Universite de Savoie, he Bourget du Lac, France;

    INSU-CNRS LOT, Universite de Savoie, he Bourget du Lac, France,Colorado School of Mines, Dept. of Geophysics, Golden, CO, USA;

    Dipartimento di Fisica, Settore Geofisica, Universita di Bologna, Italy;

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