Earth and Environmental Sciences Faculty

Juliet Ryan-Davis

Assistant Professor

Profile

My research focuses on igneous and ore-forming processes, with a personal penchant for subduction zones. I am interested in what governs the formation and evolution of dynamic, magmatic systems—and their accompanying fluids—with implications for broader crustal-scale interactions and tectonics over space and time. I integrate geological field observations with geochemistry, geochronology, and petrologic modeling to answer questions about how rocks and minerals on Earth have formed. I value collaborative and interdisciplinary work, including integrating science questions with related societal issues such as mineral resources, volcanic hazards, and geoethics.

Selected Recent Publications

  • Ryan-Davis, J., Bucholz, C.E., and Sisson, T.W. (2026), Shallow differentiation of primitive arc magmas at the Jurassic Emigrant Gap mafic complex, Sierra Nevada, CA. Journal of Petrology. 
  • Lewis, M.J., Ryan-Davis, J. and Bucholz, C.E. (2023), Mafic intrusions record mantle inputs and crustal thickness in the Eastern Sierra Nevada batholith. GSA Bulletin. 
  • Hildreth, W., Fierstein, J. and Ryan-Davis, J. (2021), No ring fracture in Mono Basin, California. Geological Society of America Bulletin. 
  • Ryan-Davis, J., Lackey, J.S., Gevedon, M.L., Barnes, J.D., Lee, C-T.A., Kitajima, K., and Valley, J.W., (2019) Andradite skarn garnet records of exceptionally low δ18O values along an Early Cretaceous intrusive contact, Sierra Nevada, CA. Contributions to Mineralogy and Petrology 174:68. ÌýÌý
  • Hildreth, W., Ryan-Davis, J., and Harlow, B., (2017), Graphite in the Bishop Tuff and its effect on postcaldera oxygen fugacity. Geosphere, v. 14(1), p. 343-359. 
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