Garnets garnet/melt partition

Drake M. J. and McFarlane E. A. (1993) Mg-perovskite/siUcate melt and majorite garnet/silicate melt partition coefficients in the system CaO-MgO-Si02 at high temperatures and pressures. J. Geophys. Res. 98, 5427-5431. 

Figure 6 Brice model fits to garnet-melt partitioning of Van Westrenen et at. (2000b) for 2+ and 3+ ions.

Figure 11 Comparison of fitted values of from garnet-melt partitioning with the Hazen-Finger relationship of Equations (14) and (15). Note that the X-site is much stiffer than would be anticipated (see text).

Figure 20 Plot of Z)xh for garnet-melt partitioning versus reciprocal temperature (see text).

VanWestrenen W., Allan N. L., Blundy J. D., Purton J. A., and Wood B. J. (2000a) Atomistic simulation of trace element incorporation into garnets-comparison with experimental garnet-melt partitioning data. Geochim. Cosmochim. Acta 64, 1629-1639. 

Figure 12 Summary of garnet/melt partition coefficients at high pressure (sourees Kato et aL, 1988a Tronnes et aL, 1992 Righter and Drake, 2000 McFarlane, 1994 Drake et aL, 1993 Ohtani et aL, 1989 Draper et aL, 2003 ...

Johnson K. T. M. (1994) Experimental cpx/ and garnet/melt partitioning of REE and other trace elements at high pressures petrogenetic implications. Min. Mag. 58A, 454-455. 

Van Westrenen et al. (2001a) present a model of lanthanide and Sc partitioning between the garnet X-site and melt. The model is a variant of the lattice strain model of clinopyroxene-melt partitioning of Wood and Blundy (1997), and is based on 160 experimental garnet-melt pairs in the pressure-temperature range 2.5-7.5 GPa and 1450-1930°C. The model includes composition-sensitive expressions for and accounts for the non-linear variation in with composition, as follows ... 

Guo J, Green TH (1990) Experimental study of barium partitioning between phlogopite and sihcate liquid at upper-mantle pressure and temperature. Lithos 24 83-96 Harrison WJ, Wood BJ (1980) An experimental investigation of the partitioning of REE between garnet and liquid with reference to the role of defects. Contrib Mineral Petrol 72 145-155 Hart SR, Duim T (1993) Experimental cpx/melt partitioning of 24 trace elements. Contrib Mineral Petrol 113 1-8... 

Table 2. Experimentally determined mineral/melt partition coefficients (x 10 ) for U, Th, and Ba in clinopyroxene and garnet and calculated bulk partition coefficients (xlO ) for a garnet peridotite source.

D s were calculated assuming 60% cpx, 40% garnet and no rutile using values from Keppler (1996) and gamet/melt cpx/melt partition coefficients to estimate gamet/fluid partitioning. ... 

Van Westrenen W., Wood B. J., and Blundy J. D. (2001a) A predictive thermodynamic model of garnet-melt trace element partitioning. Contrib. Mineral. Petrol. 142, 219-234. 

---