Tracking ancient redox chemistry with iron mineralogy and rock magnetics

In collaboration with colleagues at the University of California, Berkeley, we have published a paper in PNAS that uses detailed investigations of iron mineralogy and rock magnetics to understand redox conditions in the 1.1 billion year old Paleolake Nonesuch. These approaches offer a novel alternative to understanding deep-time redox geochemistry, especially in situations such as ancient lakes where techniques such as iron speciation do not have appropriate modern calibrations. The paper by Slotznick et al. can be found here: https://www.pnas.org/content/early/2018/11/26/1813493115