Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by KRYLOV, D. P. Articles by HOFFBAUER, R. Search for Related Content GeoRef GeoRef Citation

Oxygen isotope fractionation between zircon and water

¹ Institute of Precambrian Geology and Geochronology RAS, nab. Makarova, 2, St. Petersburg, 199034, Russian Federation e-mail: dkrylov{at}dk1899.spb.edu
² Institute of Geochemistry, Mineralogy and Ore Formation UAS, ul. Palladina 34, Kiev, 252142, Ukraine
³ Institut fur Mineralogie und Petrologie, Rheinische Friedrich Wilhelms Universitat Bonn, Poppelsdorfer Schloß, D-53115 Bonn, Germany

Oxygen isotope fractionation between synthesised zircon and water has been experimentally quantified at 700, 800, 900, and 1000 °C. The results are interpolated by: _zm-H20 = –3.70 + 2.74 ± 0.19_x2, where x = 10³/T (K). Combined with the fractionation between quartz and water (Bottinga & Javoy, 1973) this yields: _qtz-zm= 1.36_x2.

Theoretical evaluations of the reduced partition function ratios for zircon and two (a- and ß-) modifications of quartz are expressed in terms of the following polynomials: 1000 lnf_zm= 8.3306_x²+ 1.9402 _x – 0.6896 (400 < T < 1100°C) 1000 lnf_a-qtz= 7.8963 x²+7.4091 x-3.6015 (200°C < T < a-quartz stability field) 1000 lnf_ß-qtz= 9.3362 x²+ 2.4514 x – 0.7844 (ß-quartz stability field up to 1100 °C).

These expressions are in excellent agreement both with the experimentally derived factors of oxygen isotope fractionation for ß-quartz and zircon, and the incremental calibrations for a-quartz and zircon (Hoffbauer et al., 1994). The effect of a-ß-quartz transition on oxygen isotope fractionation implies, that those calculations, anchored to the theoretically evaluated reduced partition function ratios of quartz (e.g., Zheng, 1993), can predict fractionations only within the P-T stability field of the respective modification of quartz (i.e. a-quartz).

Key-words: oxygen isotopes, zircon water fractionation, quartz, geothermometry.

This article has been cited by other articles:

				I. Bindeman Oxygen Isotopes in Mantle and Crustal Magmas as Revealed by Single Crystal Analysis Reviews in Mineralogy and Geochemistry, January 1, 2008; 69(1): 445 - 478. [Full Text] [PDF]

				L. A. Coogan and R. W. Hinton Do the trace element compositions of detrital zircons require Hadean continental crust? Geology, August 1, 2006; 34(8): 633 - 636. [Abstract] [Full Text] [PDF]