James W. Dottin, III

James W. Dottin
Graduate Student
CHEM 1223B
(301) 405-3597
Research Lab

Research Interests

My research focuses on measuring and evaluating the causes of sulfur isotope variations in Ocean Island Basalts (OIBs), Martian meteorites, Pallasite meteorites, lunar basalts, and lunar soils. The overall goal of my research is to understand how sulfur is processed on various solar system bodies in high temperature environments and to reconcile the isotope variations among the various planetary bodies. Measurements are made using a variety of chemical techniques to extract sulfur and gas-source mass spectrometry in the laboratory of Dr. James Farquhar. My plans for the immediate future include research on mineral separates and bulk rock material from OIBs with varying mantle endmember compositions. The research seeks to trace processes involved in deep mantle evolution and also to further our understanding of recently discovered global anomalies.


Franz, Heather B., Kim,Sang-Tae, Farquhar, James, Day,James M. D., Economos, Rita C., McKeegan, Kevin D., Schmitt, Axel K., Irving, Anthony J., Hoek, Joost, and Dottin III, James. (2014) Isotopic links between atmospheric chemistry and the deep sulphur cycle on Mars. Nature. 508 364-368. DOI: 10.1038/nature13175

H. B. Franz, A. C. McAdam, D. W. Ming, C. Freissinet, P. R. Mahaffy, D. L. Eldridge, W. W. Fischer, J. P. Grotzinger, C. H. House, J. A. Hurowitz, S. M. McLennan, S. P. Schwenzer, D. T. Vaniman, P. D. Archer Jr, S. K. Atreya, P. G. Conrad, J. W. Dottin III, J. L. Eigenbrode, K. A. Farley, D. P. Glavin, S. S. Johnson, C. A. Knudson, R. V. Morris, R. Navarro-González, A. A. Pavlov, R. Plummer, E. B. Rampe, J. C. Stern, A. Steele, R. E. Summons & B. Sutter. (2017) Large sulfur isotope fractionations in Martian sediments at Gale crater. Nature Geoscience. DOI: 10.1038/ngeo3002