I am broadly interested in tracing the chemical and redox evolution of the ocean through Earth history. In particular, I am interested in how local sedimentary (i.e., biological, depositional, and diagenetic) processes may affect our records of past ocean chemistry. For my PhD, I employed novel geochemical tools (e.g., Secondary Ion Mass Spectrometry Ion Imaging) to deconvolve the various local environmental controls on sulfur isotope ratios in marine sedimentary iron sulfide minerals. At the University of Chicago, I am working with Prof. Clara Blättler to maximize the information content of other carbonate-based geochemical proxies using an array of stable isotope analyses.
Bryant, R.N., Jones, C., Raven, M.R., Gomes, M.L., Berelson, W.M., Bradley, A.S., Fike, D.A., 2019. Sulfur isotope analysis of microcrystalline iron sulfides using secondary ion mass spectrometry imaging: Extracting local paleo-environmental information from modern and ancient sediments. Rapid Commun. Mass Spectrom. 33, 491–502. doi:10.1002/rcm.8375
Bryant, R.N., Pasteris, J.D., Fike, D.A., 2018. Variability in the Raman Spectrum of Unpolished Growth and Fracture Surfaces of Pyrite Due to Laser Heating and Crystal Orientation. Appl. Spectrosc. 72, 37–47. doi:10.1177/0003702817736516