Tomas,
I beg to differ with Horst: whether 5 ppm or 5 wt% Li is present, the charge deficit
resulting from Li = Mg substitution must be compensated for.
There are two-three other references to consult:
Taura et al. (1998) Phys. Chem. Minerals 25:469-484
Brenan et al. (1998) Geochim Cosmochim Acta 62:2129-2141 (there may be a second
paper by these authors that might be of interest to you, but I don't have the reference
handy).
Cheers, Ed
Date sent: Thu, 17 Jan 2002 13:03:46 +0100
Send reply to: No title defined <[log in to unmask]>
From: Tomas Magna <[log in to unmask]>
Subject: Li substitution in mantle
To: [log in to unmask]
> Hi all,
>
> I would like to ask you whether you know what the substitution can Li participate on in mantle conditions in olivine. Li is known to be enriched in this mineral substituting for Mg2+ which is of similar size. But the charge should be somehow compensated. Has anybody some ideas?
> Thanks for help.
>
> Cheers,
>
> 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]
++++++++++++++++++++++++++++++++++++
Edward S. Grew
Department of Geological Sciences
University of Maine
5790 Bryand Research Center
Orono, Maine 04469-5790 USA
Tel: 207-581-2169
Fax: 207-581-2202
E-mail: [log in to unmask]
Homepage: http://www.geology.um.maine.edu/user/ed_grew/
|