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鈥攁nd their accompanying fluids鈥攚ith 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),聽Shallow differentiation of primitive arc magmas at the Jurassic Emigrant Gap mafic complex, Sierra Nevada, CA. Journal of Petrology.聽https://doi.org/10.1093/petrology/egag013
Lewis, M.J.,聽Ryan-Davis, J.聽and Bucholz, C.E. (2023), Mafic intrusions record mantle inputs and crustal thickness in the Eastern Sierra Nevada batholith. GSA Bulletin.聽https://doi.org/10.1130/B36646.1
Hildreth, W., Fierstein, J. and聽Ryan-Davis, J.聽(2021), No ring fracture in Mono Basin, California. Geological Society of America Bulletin.聽https://doi.org/10.1130/B35747.1
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聽未18O聽values along an Early Cretaceous intrusive contact, Sierra Nevada, CA. Contributions to Mineralogy and Petrology 174:68.聽https://doi.org/10.1007/s00410-019-1602-6聽聽
Hildreth, W.,聽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.聽https://doi.org/10.1130/GES01548.1
