Dear Lihua,
Following suggestions for oxygen isotope fractionations between
amphiboles and water (or calcite/quartz/feldspar) are available:

Experiments (all tremolite):
- Zheng et al. (1994): Contrib. Min. Pet. 118: 249-255.
- Matthews et al. (1983): Geochim Cosmochim Acta 47, 645-654.
- unpublished data by T. Chacko et al.
Empirical:
- Bottinga and Javoy (1975): Rev. Geophys. Space Phys. 13, 401ff.
Pseudotheoretical:
- Zheng (1993): EPSL 120, 247-263
- Hoffbauer et al. (1994): Precamb. Res. 66, 199-220.

All the best and make a good choice
Albert
-----------------------------
H. Albert Gilg
Lehrstuhl fuer Angewandte Mineralogie und Geochemie
Technische Universitaet Muenchen
Lichtenbergstr. 4
D-85747 GARCHING - Germany
Tel.:++49/89/289-13196
Fax.:++49/89/289-13205
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