11:00 AM - 11:15 AM
[SVC39-08] Constraining electrical resistivity structure of volcanoes using multiphase flow modelling: an example of Miyake-jima
Keywords:Hydrothermal system, Magnetotellurics, Miyake-jima, multiphase flow, electrical resistivity, alteration
Here, we propose a new approach to address this issue. First, we performed a 3-D electrical resistivity imagery of the Miyake-jima volcano using Magnetotellurics. Next, we combined the resistivity model obtained with hypocenters distribution. We revealed the sharp boundary between the saturated and unsaturated region, and a large conductive hydrothermal system connected to the main fumarolic area through a fractured region. Finally, we created a multiphase flow model of the volcano that constrains the resistivity model in term of temperature, fluid content and alteration.