Host: Japan Association of Mineralogical Sciences
Hydrothermal experiments (230̊C, Psat) were carried out in olivine–plagioclase (Pl)–H2O system, as analogues of crust-mantle boundary. The mineralogy of the reaction products in the Ol-hosted region changed with increasing distance from the Ol–Pl boundary, from Al-lizardite to Al-free lizardite + brucite + magnetite. On the other hand, in Pl-hosted region, reaction products were not observed. The estimated element transport distance for Al and Si is 1.5 mm and 3.7 mm from Ol–Pl boundary, respectively. The total H2O content is greater at the contact of Ol and Pl in Ol-hosted region than others.