Abstract
With improvements on high-pressure experimental techniques in multi-anvil apparatus and the development of new analytical tools, major progress has been made on diffusion in garnets in the past several decades. The data obtained in the experimental determination of diffusion coefficients in garnets are of fundamental importance for diffusion modeling and timescales of geological and planetary processes. In this review, we have compiled experimental data on self-diffusion (Si, O, cations), trace element diffusion (Li, Y, Ga, Cr, Sr, REEs), and interdiffusion (Ca–Fe/Mg, Si–Al) in garnet in the light of new advances and recent applications. In addition, some empirical relationships among diffusion parameters (pre-exponential factor D0, activation energy E, ionic radius) are also discussed. We hope that this review can provide a useful data digest and guide to future study of diffusion in garnet.
Highlights
Diffusion is believed to be the rate-determining step in many processes of interest to materials science, physical metallurgy, geosciences, and many other areas
The data obtained in the experimental determination of diffusion coefficients in garnets are of fundamental importance for diffusion modeling and timescales of geological and planetary processes
Knowledge of diffusion rate in garnet allows constraints to be placed on detailed records of geological processes, timescales, and thermodynamic conditions in many natural contexts where mass transport is dominated by solid state diffusive processes
Summary
Diffusion is believed to be the rate-determining step in many processes of interest to materials science, physical metallurgy, geosciences, and many other areas. Diffusion in garnet is of special interest owing to its common presence in rocks of the deep crust and upper mantle, its wide range of major- and trace-element composition, and the broad span of temperatures over which appreciable modification of its compositional zoning can occur (Chakraborty and Ganguly 1992). A significant body of experimental diffusion data exists in the literature, and partial reviews for systems and materials of geological interest are available for diffusion in garnet (Freer 1981; Brady 1995; Ganguly 2002, 2010; Bejina et al 2003; Watson and Baxter 2007; Chakraborty 2008, 2010; Brady and Cherniak 2010; Cherniak and Dimanov 2010). Some empirical relationships and geological applications of experimental diffusion data are discussed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
