0000000000384736
AUTHOR
Melissa J. Murphy
Lithium isotope evidence for enhanced weathering and erosion during the Paleocene-Eocene Thermal Maximum.
Description
The lithium and magnesium isotope signature of olivine dissolution in soil experiments
Abstract This study presents lithium and magnesium isotope ratios of soils and their drainage waters from a well-characterised weathering experiment with two soil cores, one with olivine added to the surface layer, and the other a control core. The experimental design mimics olivine addition to soils for CO2 sequestration and/or crop fertilisation, as well as natural surface addition of reactive minerals such as during volcanic deposition. More generally, this study presents an opportunity to better understand how isotopic fractionation records weathering processes. At the start of the experiment, waters draining both cores have similar Mg isotope composition to the soil exchangeable pool. …