Abstract:
Oxygen and hydrogen isotope fractionation factors in the talc-water and serpentine-water systems
have been determined by laboratory experiment from 250 to 450°C at 50 MPa using the partial
exchange technique. Talc was synthesized from brucite + quartz, resulting in nearly 100%
exchange during reaction at 350 and 450°C. For serpentine, D-H exchange was much more rapid
than 18O-16O exchange when natural chrysotile fibers were employed in the initial charge. In
experiments with lizardite as the starting charge, recrystallization to chrysotile enhanced the rate
of 18O-16O exchange with the coexisting aqueous phase.
Description:
Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Geochimica et Cosmochimica Acta 73 (2009): 6789-6804, doi:10.1016/j.gca.2009.07.036.
