fluor garnet

Francois and all,

I know of two papers specifically addressing F in garnet, one by us (Valley, J.W., Essene, E.J. and Peacor, D.R., 1983, Fluorine-bearing garnets in Adirondacks calc-silicates, Amer. Mineral. 68, 444-448) and one by Craig Manning around 1990 or so. These garnets are Ca rich but have only a few wt % F. Fluorite doesn't require particularly high activity of F2 although it clearly indicates that F is in the rock. One would also expect the phlogopite to be F rich as well.

eric

        Hello,

        Would anybody know reference of works about F-rich garnets [in my case, up to 20-weight% of (F,OH), in equilibrium with CaF2, phg (Si<3,5), Ab,Kflsp,biot] ?
        Thanking you in advance for any help.
--
---François GUILLOT---
Univ. Sci. Tech. Lille
Labo. Sédimentologie & Géodynamique
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