The Influence of Hydrothermal Activity on the Li Isotopic Signature of Rivers Draining Volcanic Areas

Henchiri, S.; Clergue, C.; Dellinger, M.; Gaillardet, J.; Louvat, P.; Bouchez, J.

doi:10.1016/j.proeps.2014.08.026

The Influence of Hydrothermal Activity on the Li Isotopic Signature of Rivers Draining Volcanic Areas

Henchiri, S.; Clergue, C.; Dellinger, M.; Gaillardet, J.; Louvat, P.; Bouchez, J.

Authors

S. Henchiri

C. Clergue

M. Dellinger

J. Gaillardet

P. Louvat

J. Bouchez

Abstract

We explore the geochemistry and the isotopic composition of lithium (δ7Li) of rivers draining volcanic islands (Guadeloupe, Iceland, Java, Martinique and Sao Miguel) with a specific focus on continental hydrothermal activity. Our preliminary results reveal a global-scale trend between δ7Li and the elemental ratio Li/Na in rivers draining volcanic islands. We suggest that this trend results from a mixture between waters with low δ7Li and high Li/Na, inherited from high-temperature water rock interactions, and waters with low Li/Na and high δ7Li, in which Li is controlled by the neoformation of clays during low-temperature chemical weathering in basaltic soils. This latter process can be described by a simple isotope fractionation model, consistent with reported values for isotopic fractionation factors between secondary weathering products and water. These data highlight the important potential role of continental high-temperature weathering processes on the oceanic budget of lithium.

Citation

Henchiri, S., Clergue, C., Dellinger, M., Gaillardet, J., Louvat, P., & Bouchez, J. (2014). The Influence of Hydrothermal Activity on the Li Isotopic Signature of Rivers Draining Volcanic Areas. Procedia earth and planetary science, 10, 223-230. https://doi.org/10.1016/j.proeps.2014.08.026

Journal Article Type	Article
Online Publication Date	Aug 26, 2014
Publication Date	Aug 26, 2014
Deposit Date	Aug 2, 2017
Publicly Available Date	Jun 6, 2018
Journal	Procedia: Earth and Planetary Science
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	10
Pages	223-230
DOI	https://doi.org/10.1016/j.proeps.2014.08.026

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http://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright Statement
© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/by-nc-nd/3.0/