11:00 AM - 11:15 AM
[SCG60-01] Thermal structure and melt fraction distribution of mantle from a 3-D electrical conductivity structure beneath Kyushu
We use laboratory work results to determine thermal structure and melt fraction distributions derived from the electrical conductivity structure beneath the Kyushu Island. The laboratory work results are relation between electrical conductivity and temperature for four nominally anhydrous minerals (Olivine, Orthopyroxene, Clinopyroxene, and Garnet) in solid phase, relation between electrical conductivity and temperature for hydrous basaltic melt in liquid phase, and a parameterization result of isobaric hydrous mantle melting. In this presentation, we will show our approach to determine temperature and melt fraction as a function of the water contents among the four mantle minerals and the basaltic melt, which integrate laboratory-derived conductivity and field-derived conductivity. We will also show thermal structure profiles and melt fraction distribution profiles of the mantle wedge beneath the one non-volcanic region and the two volcanic regions of the Kyushu Island.