[SCG61-P01] Three-dimensional imaging of geo-fluid distribution at NE-Japan forearc using wideband magnetotelluric measurements
Keywords:geofluid, NE Japan forearc, magnetotelluric method
In our model, distribution of low resistivity indicating rising fluids from the deep part was not analyzed corresponding to the P wave low velocity region of Zhao et al.(2014). However, vertical low resistivity was analyzed from the volcanic front toward forarc. The conductors spread 30 km east of the volcanic front at depths of 10-40 km. This low resistivity is in good agreement with the low velocity distribution (Zhao et al., 2014; Okada et al., 2015). The low resistivity east of volcanic front is almost vertically continuous from the uppermost mantle to the middle crust. Therefore, this may indicate that the fluid on the mantle flow reaches the uppermost mantle of the forearc and releases fluids in the forearc crust.