Dear Fabienne,

for D(grt/cpx) trace element partitioning data on metagabbros you can use:

Tribuzio, R. et al. (1996): Rare earth element redistribution during
high-pressure low-temperature metamorphism in ophiolitic Fe-gabbros
(Liguria, northwestern Italy): Implications for light REE mobility in
subduction zone. Geology 24, 711-714.

and

Messiga, B. et al. (1995) An ion microprobe study on trace element
composition of clinopyroxenes from blueschist and eclogitized
Fe-Ti-gabbros, Ligurian Alps, northwestern Italy: Some petrological
considerations. Geochim. Cosmochim. Acta 59, 59-75.

There is also an important contribution of M. Mazzucchelli in GCA (somehere
between 1988-1995) on this subject (with trace element profiles), but
unfortunately I don't have it at hand.

Since you will deal most probably with unequilibrated samples, it is of
help to compare your data with samples who had more time and temperature
for equilibration as well as no time for reequilibration. Such relatively
ideal samples exist in the form of mantle xenolith, like eclogites and
garnet pyroxenites. Especially the trace element literature on mantle
eclogites is extensive (just search for "eclogite" and "trace element" in
georef, etc.). To get an overview about the effect of different crystal
chemestries on D, start with:

Harte, B & Kikley, M.B. (1997) Partitioning of trace elements between
clinopyroxene and garnet: Data from mantle eclogites. Chem. Geol. 136: 1-24.

Well, for garnet pyroxenites you might also want to have a look at:

Zack, T. et al. (1997) A consistent partition coefficient set for
clinopyroxene, amphibole and garnet from laser ablation microprobe analysis
of garnet pyroxenites from Kakanui, New Zealand. N. Jb. Miner. Abh. 172,
23-41.

Hope this helps,
Thomas Zack


>Dear all list-members,
>
>I'm currently writing my ph-d dissertation on rodingites of the Italian
>Alps. As I have to compare my data on garnets and CPX to metagabbros', I
>would need some REE- and traces-profiles on garnets and CPX of metagabbros
>in greenschist and eclogite facies.
>
>
>As I have already spent so many times in libraries for so few results, I
>would be glad to be helped by list-members.
>
>Thanks in advance,
>
>Fabienne

Pierre Cartigny
Laboratoire de Géochimie des Isotopes Stables
I.P.G.P.
Université Paris 7-Denis Diderot
Tour 54-64 1er étage
4, place Jussieu
75252 Paris Cedex 05
France
Tél. (33) 01 44 27 60 88
Fax (33) 01 44 27 28 30




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