banner USF Home College of Arts & Sciences OASIS myUSF USF A-Z Index

USF Home > College of Arts and Sciences > School of Geosciences

Jeffrey  Ryan

Jeffrey Ryan

Jeffrey Ryan


Office: SCA 507
Phone: 813/974-1598
Lab: SCA 508
Email (alt):



Ph.D., Columbia University, 1989


Blog about my voyage on the Research Vessel JOIDES Resolution August - September 2014

Geochemistry and Petrology of Subduction Zones, Modern and Ancient. Geochemical Evolution of the Earth's Mantle. Petrogenesis of Ultramafic Rocks. Appalachian Geology and Tectonics. Meteoritic/Planetary Geochemistry.

Graduate Students

Mary Beck, Meghan Cook, Stephanie Drumm, Ray Johnston, Antonio Luna, Anita Marshall, Keir Sanatan

Victor Ricchezza

Specialty Area

Petrology, Geochemistry, and Geoscience Education

Current Courses

RefCourseSecCourse TitleCRDayTimeLocation
50971GLY 6971004Thesis: Master's

56109GLY 7912017Directed Research


Recent Publications

  • Ryan, J.G., (2013) Embedding research practice activities into earth and planetary science courses through the use of remotely operable analytical instrumentation: interventions, and impacts on student perceptions and activities Tong, V. (ed). Geoscience Research and Education: Teaching at Universities. New York, Springer Verlag., p. 149-162.
  • Ryan, J.G. and Chauvel, C., (2013), “The Subduction Zone Conveyor and the Impact of Recycled Materials on the Evolution of the Mantle.” Chapter 3.13: The Mantle and Core (Carlson, R. Ed.), Treatise on Geochemistry, Second Edition p. 479-508.
  • Walker, J.A., A. Teipel, J.G. Ryan, and E. Syracuse (2009) Light elements and Li isotopes across the northern portion of the Central American subduction zone. Geochemistry, Geophysics, Geosystems, 10, Q06S16, doi:10.1029/2009GC002414
  • Peterson, V.L., J.G. Ryan, and the 1997-1998 REU Site Program Participants (2008) Geochemistry and petrogenesis of the Buck Creek mafic/ultramafic complex, western North Carolina. Geological Society of America Bulletin, 129, pp. 615-629.
  • Savov, I.P., J.G. Ryan, P. Fryer, and M. D'Antonio (2005) Geochemistry of serpentinites from the Mariana forearc - Conical Seamount, ODP Leg 125: describing fluid-mediated slab additions. Geochemistry, Geophysics, Geosystems vol. 6, Q04J15 DOI10.1029/2004GC000777.
  • Savov, I.P., S. Guggino, J.G. Ryan, P. Fryer, and M. Mottl (2005) Geochemistry of serpentine muds and metamorphic rocks from the Mariana Forearc, ODP Sites 1200 and 778 -779, S.Chamorro and Conical seamounts. ODP Scientific Results, volume 195.
  • Ryan, J.G. and Kyle, P.R., (2004) Lithium and lithium isotope variations in intraplate mantle sources: insights from McMurdo Group lavas (Mt. Erebus) and other intraplate volcanic rocks. Chemical Geology, v. 212, pp 125-142.
  • Benton, L., J.G. Ryan, and I. Savov (2004) Lithium abundance and isotope systematics of forearc serpentinites, Conical Seamount, Mariana forearc: Insights into the mechanisms of slab/mantle exchange during subduction. Geochemistry, Geophysics, Geosystems, v. 5, 10.1029/2004GC000708.
  • Lang, H., Lee, A., Peterson, V. and J.G. Ryan (2004) Coexisting clinpyroxene/spinel and amphibole/spinel symplectites in metatroctolites from the Buck Creek ultramafic body, North Carolina Blue Ridge, USA. American Mineralogist, v. 89, pp. 20-30.