Articles | Volume 36, issue 6
https://doi.org/10.5194/ejm-36-985-2024
https://doi.org/10.5194/ejm-36-985-2024
Research article
 | 
02 Dec 2024
Research article |  | 02 Dec 2024

Li diffusion in plagioclase crystals and glasses – implications for timescales of geological processes

Florian Pohl, Harald Behrens, Martin Oeser, Felix Marxer, and Ralf Dohmen

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Cited articles

Audétat, A., Zhang, L., and Ni, H.: Copper and Li diffusion in plagioclase, pyroxenes, olivine and apatite, and consequences for the composition of melt inclusions, Geochim. Cosmochim. Ac., 243, 99–115, https://doi.org/10.1016/j.gca.2018.09.016, 2018. 
Behrens, H.: Na and Ca tracer diffusion in plagioclase glasses and supercooled melts, Chem. Geol., 96, 267–275, 1992. 
Behrens, H.: Hydrogen defects in feldspars: defect properties and implications for water solubility in feldspar, Phys. Chem. Miner., 48, 8, https://doi.org/10.1007/s00269-020-01128-0, 2021a. 
Behrens, H.: Hydrogen defects in feldspars: kinetics of D/H isotope exchange and diffusion of hydrogen species in alkali feldspars, Phys. Chem. Miner., 48, 1–23, 2021b. 
Behrens, H.: Hydrogen defects in feldspars: alkali-supported dehydrogenation of sanidine, Phys. Chem. Miner., 50, 18, https://doi.org/10.1007/s00269-023-01242-9, 2023. 
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Short summary
The growing interest in lithium (Li) diffusion for the determination of timescales of magmatic events increases the necessity to better understand Li diffusion in common mineral phases. In this context we analyzed Li diffusion in plagioclase, one of the most common mineral phases. Our study is the first to confirm two diffusion mechanisms for Li in plagioclase, and our results indicate timescales derived from Li diffusion data in previous studies were underestimated by a factor of up to 100.