Hydrous partial melting of the upper mantle as judged from mineral/melt partition coefficients

Hydrous partial melting of the upper mantle as judged from

mineral/melt partition coefficients

Marc M. Hirschmann

Cyril Aubaud

Tony Withers

University of Minnesota

Hirth and Kohlstedt, 1996

Aubaud et al., 2004

Bercovici and Karato, 2003

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Aubaud et al., 2004

Experimental Measurements of H2O PartitioningBetween Melts and Nominally Anhydrous Minerals

Koga et al. 2003; Aubaud et al., 2004, in prep; Hauri et al., 2006)

=Test of Simple ModelIn System Olivine-H2O

1 GPa

€

T =1

1

Tperidotitefusion

−R

ΔHperidotitefusion

ln 1 -XOH -melt

( )

⎛

⎝ ⎜ ⎜

⎞

⎠ ⎟ ⎟

Aubaud et al., GRL, 2004

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

€

T =1

1

Tperidotitefusion

−R

ΔHperidotitefusion

ln 1 -XOH -melt

( )

⎛

⎝ ⎜ ⎜

⎞

⎠ ⎟ ⎟

Aubaud et al., GRL, 2004

Al3+ + H+ <-> Si4+

Effect of H2Oon the liquidus of naturalbasalts

Medard and Grove(submitted)

=Test of Simple ModelIn System Olivine-H2O

1 GPa