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A new experimental approach for incremental batch melting of peridotite at 1.5 GPa
Author(s) -
Hirose Kei,
Kawamura Katsuyuki
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/94gl01792
Subject(s) - partial melting , peridotite , melting temperature , melting point , materials science , melting point depression , thermodynamics , mantle (geology) , geology , geochemistry , composite material , physics
Melt generation by incremental batch melting of peridotite with a complete melt withdrawal was experimentally investigated. The experiments were made using the “diamond aggregate method” at 1.5 GPa with increasing temperature from 1275° to 1425°C and total degree of partial melting to 22.6 wt.%. The incremental batch melting significantly differs from the batch melting in amount and composition of melt formed. The total degrees of partial melting formed by incremental batch melting are considerably lower than those formed by batch melting at the same temperatures. The compositions of incremental melts change more rapidly than do those of batch melts with increasing temperature. The accumulated compositions of incremental melts are, however, similar to those of batch melts formed by the same total degrees of partial melting. If melts are generated isobarically, both the melting processes can form melts with similar major oxide compositions, but the temperatures needed are significantly different.