Article ID Journal Published Year Pages File Type
9530302 Geochimica et Cosmochimica Acta 2005 17 Pages PDF
Abstract
We develop a numerical model and examine several scenarios of the combined diffusion-extraction process. Using experimentally constrained values for the change in Li diffusion coefficient with isotope mass, large changes in δ7Li as a function of distance can be created in year to decade timescales. The addition of the melt extraction term allows larger Li concentration gradients to be developed and thus produces larger isotopic fractionations than diffusion only models. The extraction aspect of the model can also account for the observed decrease in rare earth element concentrations across the transects.
Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Geochemistry and Petrology
Authors
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