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Tomas,

I measured apatite/fluid partition coefficients for REE and used them to
model REE mobility in the following paper:

Ayers, J.C., and Watson, E.B. (1993) Apatite/fluid partitioning of
rare-earth elements and strontium; experimental results at 1.0 GPa and 1000
degrees C and application to models of fluid-rock interaction. Geochemistry
of accessory minerals; papers presented at the Third V. M. Goldschmidt
conference. Chemical Geology, 110(1-3), 299-314.

Best regards,

John

Dr. John C. Ayers, Associate Professor
Dept. of Earth and Environmental Sciences
Vanderbilt University
VU Station B #350105
2301 Vanderbilt Pl.
Nashville, TN 37235-0105
Office: (615) 322-2158   Lab: (615) 343-4136
FAX: (615) 322-2138     Home: (615) 376-0931
Web: http://www.cas.vanderbilt.edu/ayers/



-----Original Message-----
From: Metamorphic Studies Group [mailto:[log in to unmask]] On
Behalf Of Tomas Magna
Sent: Friday, March 21, 2003 3:31 AM
To: [log in to unmask]
Subject: Re: REE behavior


Hi all,

Just a question...apatite is known to cumulate vast amounts of REEs. Could
it have any influence on REE mobility during some metamorphic or metasomatic
mobilization events? 

Tomas

__________________________________________
Tomas Magna
Institute for Isotope Geology and Mineral Resources
Department of Earth Sciences, ETH Zentrum, NO C61.1 Sonneggstrasse
5,CH-8092, Zürich, Switzerland tel. +41-1-632-6441 fax. +41-1-632-1179
e-mail: [log in to unmask]