Empirical calibration of oxygen isotope fractionation in zircon

New empirical calibrations for the fractionation of oxygen isotopes among zircon, almandine-rich garnet, titanite, and quartz are combined with experimental values for quartz-grossular. The resulting A-coefficients (‰K 2) are: Zrc Alm Grs Ttn Qtz 2.64 2.71 3.03 3.66 Zrc 0.07 0.39 1.02 Alm 0.32 0.95...

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Bibliographic Details
Published in:Geochimica et cosmochimica acta 2003-09, Vol.67 (17), p.3257-3266
Main Authors: Valley, John W., Bindeman, Ilya N., Peck, William H.
Format: Article
Language:English
Subjects:
fractionation
garnet
oxygen isotopes
quartz
titanite
zircon
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Summary:New empirical calibrations for the fractionation of oxygen isotopes among zircon, almandine-rich garnet, titanite, and quartz are combined with experimental values for quartz-grossular. The resulting A-coefficients (‰K 2) are: Zrc Alm Grs Ttn Qtz 2.64 2.71 3.03 3.66 Zrc 0.07 0.39 1.02 Alm 0.32 0.95 Grs 0.63 for the relation 1000 ln α Y-X = A Y-X (10 6/T 2). The fractionation of oxygen isotopes between zircon and coexisting minerals can provide otherwise unavailable evidence of magmatic processes, including crystallization, remelting, and assimilation-fractional crystallization.
ISSN:0016-7037
1872-9533
DOI:10.1016/S0016-7037(03)00090-5