Host: Japan Association of Mineralogical Sciences
The melting conditions have been estimated inversely by optimizing the predicted magma composition to the observed composition of volcanic rock, with the two parameters: melting degree and the proportion of spinel- and garnet-lherzolite involved in melting. Consequently, the low melting degree of dominantly garnet-lherzolite with a high fluid flux from the two slabs beneath central Japan has been argued to be responsible for compositional characteristics, including the adakitic signatures, of the studied rocks. These results imply that the geochemical approach may provide a useful constrain to the P-T condition in the mantle wedge to constrain the geothermal structure in subduction zones.
