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JOURNAL OF PETROLOGY VOLUME 40 NUMBER 3 PAGES 475494 1999 Steady-state MantleMelt Interactions in
 

Summary: JOURNAL OF PETROLOGY VOLUME 40 NUMBER 3 PAGES 475­494 1999
Steady-state Mantle­Melt Interactions in
One Dimension: I. Equilibrium Transport
and Melt Focusing
P. D. ASIMOW AND E. M. STOLPER
DIVISION OF GEOLOGICAL AND PLANETARY SCIENCES, CALIFORNIA INSTITUTE OF TECHNOLOGY,
PASADENA, CA 91125, USA
RECEIVED DECEMBER 1, 1997; REVISED TYPESCRIPT ACCEPTED AUGUST 13, 1998
Mantle­melt interaction during melt transport is explored in one generally moves relative to the residual solid phases. This
follows from experimental and theoretical studies of thedimension and steady state. We reconsider the equivalence between
one-dimensional steady equilibrium transport and batch melting. In equilibrium textures of olivine-dominated, partially mol-
ten systems, which indicate that the liquid phase isthe absence of diffusion and radioactivity, conservation of mass flux
requires that the major and trace element compositions of melt and interconnected at melt fractions <1% (Waff & Bulau,
1979; von Bargen & Waff, 1986; Kohlstedt, 1991), sug-solid at each point are the same as is generated by batch melting
the source composition at the same pressure and temperature. Energy gesting that even at very low melt fractions, melt can begin
to move by porous flow, driven by density differences orconservation requires that temperature and extent of melting are
independent of melt migration except for irreversible source terms by shear of the matrix (McKenzie, 1984; Richter &
McKenzie, 1984; Spiegelman & McKenzie, 1987; Ste-related to viscous compaction and gravitational energy release. The
equivalence of phase compositions at each pressure between steady- venson & Scott, 1991). For reasonable grain sizes and
rates of solid-state diffusion in the residual minerals, thestate equilibrium transport and batch melting simplifies melt transport

  

Source: Asimow, Paul D. - Division of Geological and Planetary Sciences, California Institute of Technology,

 

Collections: Geosciences