Ca isotopes record rapid crystal growth in volcanic and subvolcanic systems [Earth, Atmospheric, and Planetary Sciences]

Kinetic calcium isotope effects can be used as growth-rate proxies for volcanic and subvolcanic minerals. Here, we analyze Ca isotopic compositions in experimental and natural samples and confirm that large kinetic effects (>2‰) can occur during magmatic plagioclase crystallization. Experiments confirm theoretical predictions that disequilibrium isotope effects depend mainly on...

Source: Proceedings of the National Academy of Sciences - October 7, 2019 Category: Science Authors: Michael A. Antonelli, Tushar Mittal, Anders McCarthy, Barbara Tripoli, James M. Watkins, Donald J. DePaolo Tags: Physical Sciences Source Type: research