部分溶融体中の液相分布

概要

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Distitribution of the melt phase in a partially molten system is controlled by the interfacial energy ratio between the melt and solid phases under textural equlilbrium and hydrostatic condition. In case of multiphase solids system, the melt phase distribution is not homogeneous at grain boundaries due to the different dihedral angles (i.e. interfacial energy ratios). By using a newly proposed model of the the multiphase grain control percolation (MGCP), critical modal composition and critical melt fraction, at which the melt network is connected extensively over the system, for a natural spinel Iherzolite are estimated to be 63 and 0.8 vol.%, respectively. Petrological and geophysical implications are discussed for the partial melting and cumulate forming processes. It is likely that a partially molten layer would remain at critical state where the melt network becomes connecting thoroughout the system.
特定非営利活動法人日本火山学会の論文
1990-04-14