Isotopic Fractionation of Lithium and Cerium by Fluid-Rock Interactions on Earth's Surface
Abstract
The research will investigate isotopic fractionation of two elements, lithium and potassium, as well as rare earth element behavior in Earths surface environment through complementary laboratory experiments and field studies. The rare earth elements and lithium isotopic system are better studied, but although a number of applications have been developed, systematic evaluation on fractionation by weathering has not been performed. Recently developed analytical methods indicate that measurement of potassium isotopic ratios is possible, and the potential of using K isotopes to determine paleo conditions has been explored. However, the use of K isotopes as tracers of other processes has not been considered. The proposed effort will gather foundational knowledge that is expected to serve as a starting point for a range of potential applications in environmental chemistry, paleoclimatology, and surface processes. The research will combine analysis of data from samples obtained on the island of San Cristobal in the Galapagos archipelago with those from laboratory experiments to determine fractionation of lithium and potassium between water and common clays, using known standards in a controlled setting and under conditions relevant to the surface environment. Although at the proposal stage we had anticipated also investing cerium isotopic behavior, based on the analytical capabilities available and the many fruitful directions that resulted from analysis of Li, K and other trace elements, Ce analyses were not performed but may be by Prof. Liu in follow-on research.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 08, 2022
- Accession Number
- AD1196482
Entities
People
- Julia G. Barzyk
Organizations
- University of North Carolina at Chapel Hill