Garnets series

Table 5.23 Thermochemical data for various endmembers of the garnet series.

Perhaps the biggest challenge in estimating U-series partition coefficients is the case of protactinium partitioning into garnet. The difficulty arises because the ionic radius of... 

Garnet ferrites, 11 55, 56t, 57 Gamet-hydrogarnet solid solution series, 5 479t... 

Babuska V., Fiala I, Kumazawa M., and Ohno I. (1978). Elastic Properties of Garnet Solid-Solution series. Phys. Earth Planet Int, 16 157-176. 

Isaak D. G. and Graham E. K. (1976). The elastic properties of an almandine-spessartite garnet and elasticity in the garnet solid solutions series. J. Geophys. Res, 81 2483-2489. 

Leitner B. I, Weidner D. J., and Liebermann R. C. (1980). Elasticity of single crystal pyrope and implications for garnet solid solution series. Phys. Earth Planet. Interiors., 22 111. 

Meagher E. P. (1982). Silicate garnets. In Reviews in Mineralogy, vol. 5, P. H. Ribbe (series ed.), Mineralogical Society of America. 

Diamond-bearing rocks within the Zerendin series include garnet-biotite gneiss, garnet-kyan ite-muscovite-q ua rtz... 

The distribution coefficients of the parent and daughter nuclides are important in U-series disequilibria. If the parent has a higher distribution coefficient than the daughter, its extraction from the matrix is retarded and the daughter/parent activity ratio in the melt can be greater than 1. Experiments have shown that Dy > Dj for garnet peridotites but Du spinel peridotites at low pressures. Due to experimental difficulties, Dro and Dpa are not directly known but are inferred to be very small. Therefore, it is reasonable to assume Dj, >Di and Du > Dp for both garnet peridotites and spinel peridotites. 

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