Publications (students in italics)

Please send reprint requests to:

Singer, B.S., B.R. Jicha, W.P. Leeman, M.F. Thirwall, N.W. Rogers, and J.G. Ryan (2006) Along strike trace element and isotopic variation in the Central Aleutian island arc basalt: subducted sediments melt and and serpentine dehydrates Journal of Geophysical Research, accepted.

Peterson, V., J.G. Ryan, S. P. Yurkovich, J. Burr, S. Kruse, and the 1997-2001 REU Site Program Participants (2006) The Petrogenesis and tectonic implications of Blue Ridge mafic-ultramafic rocks: The Buck Creek and Carroll Knob complexes, and rocks of the Addie-Willets region.  For the 2006-2007 GSA Southeastern Section Field Trips guidebook.

Ryan, J.G., S.P. Yurkovich, V.L. Peterson, J. Burr, S. Kruse, and the 2001 REU Site Program Participants. (2005) Geology and petrogenesis of mafic and ultramafic rocks of the Willets-Addie area, Central Blue Ridge, NC.  In Hatcher, R.D. and Merschatt, A.J (eds.)  Blue Ridge Geology Geotraverse East of the Great Smoky Mountains National Park, Western North Carolina.  Guidebook of the 2005 Carolina Geological Society annual field trip, pp. 91-98.

Swanson, S., L. Raymond, R. Warner, J.G. Ryan, S. P. Yurkovich, V.L. Peterson (2005) Petrotectonics of mafic and ultramafic rocks in Blue Ridge terranes of western North Carolina and northern Georgia. In Hatcher, R.D. and Merschatt, A.J (eds.)  Blue Ridge Geology Geotraverse East of the Great Smoky Mountains National Park, Western North Carolina.  Guidebook of the 2005 Carolina Geological Society annual field trip, pp. 73-91.

Savov, I.P., R. Hickey- Vargas, M. D'Antonio, and J.G. Ryan, (2005) Petrology and Geochemistry of West Philippine Back-arc Basin Basalts and Early Palau-Kyushu Arc volcaniclasts from ODP Leg 195, Site 1201:Implications for the evolution of the Izu- Bonin-Mariana subduction factory.  Journal of Petrology, available online 8/31/05.

George, R., S. Turner, J. Morris, T. Plank, C. Hawkesworth and J.G. Ryan (2005) Pressure-temperature-time paths of sediment recycling beneath the Tonga-Kermadec Arc.   Earth and Planetary Science Letters, 233, p. 195-211.

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.

Peterson, V.L., J.G. Ryan, S.P. Yurkovich, S.E. Kruse, and J. Burr (2003) A collaborative field-laboratory summer Research Experiences for Undergraduates (REU) Program in Geosciences.  CUR Quarterly, Sept. 2003 p. 5-9 (also published online,

Morris, J.D. and J.G. Ryan (2003) Subduction zone processes and implications for changing composition of the upper and lower mantle.  Treatise on Geochemistry, Part 2: The Mantle (Carlson, R., ed.), Chapter 2.11, pp. 451-470.

Ryan, J.G. (2002) The trace-element behavior of beryllium in terrestrial materials.  In Grew. E., (ed.): Beryllium: Mineralogy and Geochemistry.  Reviews of Mineralogy and Geochemistry, vol. 50, pp. 121-145. 

George, R., S. Turner, C. Hawkesworth, J. Morris, C. Nye, J.G. Ryan and S-H. Zheng (2003) Melting processes and fluid and sediment transport rates along the Alaska-Aleutian arc from and integrated U-Th-Ra-Be isotope study.  Journal of Geophysical Research, v. 108, no. B5, 2252,doi:10.1029/2002JB001916.

Tomascak, P.B., E. Widom, L. D. Benton, S.J. Goldstein, and J. G. Ryan, (2002) The control of lithium budgets in island arcs . Earth and Planetary Science Letters, v. 196, pp 227-238

Hickey-Vargas, R., M. Sun, L. Lopez-Escobar, H. Moreno-Roa, M.K. Reagan, J.D. Morris, and J. G. Ryan (2002) Multiple subduction components in the mantle wedge: evidence from eruptive centers in the Central Southern volcanic zone, Chile. Geology, 30: 199-202.

Lentz, R.C.F., H.Y. McSween, Jr., J.G. Ryan , L. Riciputi, (2001) Water in martian magmas: Clues from light lithophile elements in shergottites and nakhlites. Geochimica et Cosmochimica Acta, 65: 4551-4565.

Savov, I . P.J.G. Ryan, I. Haydoutov, and J. Schijf. (2001) Late Precambrian Balkan-Carpathian ophiolite - a slice of Pan-African ocean crust? Geochemical and tectonic insights from the Tcherni Vrah and Deli Jovan masifs, Bulgaria and Serbia. Journal of Volcanology and Geothermal Research, 10: 299-318.

Berger, S, Cochrane, D., Simons, K. Savov I. , J.G. Ryan, and V.L Peterson (2001) Insights from rare earth elements into the genesis of the Buck Creek Complex and other Blue Ridge ultramafic bodies. Southeastern Geology, vol. 40, no. 3, pp. 201-212.

Benton, L.D., J.G. Ryan , and F. Tera (2001) Boron isotope systematics of slab fluids as inferred from a serpentinite seamount, Mariana forearc. Earth and Planetary Science Letters, vol. 187, p. 273-282.

McSween, H.Y., Jr., T.L. Grove, R.C.F. Lentz, J.C. Dann, A.H. Holzheid, L.R. Riciputi, and J.G.Ryan (2001) Geochemical evidence for magmatic water within Mars from pyroxenes in the Shergotty meteorite . Nature, vol. 409, p. 487-490.

Dixon, J.E., K. Simons, L. Leist, C. Eck, J. Ricisak, J. Gifford, and J.G. Ryan (2000), Provenance of stone celts from the Miami Circle archaeological site. The Florida Anthropologist , 53, 328-341.

Davis, R.A., Jr., A.T. Welty , J. Borrego, J.A. Morales, J.G. Pendon, and J.G. Ryan, 2000, Rio Tinto estuary (Spain): 5000 years of pollution. Environmental Geology, vol. 39, 1107-1116.

P.B. Tomascak, J.G. Ryan , and M.J. Defant , 2000 Lithium isotope evidence for light element decoupling in the Panama subarc mantle Geology vol. 28, pp. 507-510.

G. Bebout, J.G. Ryan , W.P. Leeman, and A.E. Bebout, 1999, Fractionation of trace elements during subduction-zone metamorphism - effect of convergent margin thermal evolution Earth and Planetary Science Letters vol. 171, pp. 63-81.

Ryan, J.G., J. Morris, G. Bebout, and W.P. Leeman, 1996, Describing chemical fluxes in subduction zones: insights from "depth profiling" studies of arc and forearc rocks. In: Subduction: Top to Bottom , (G.E. Bebout, et al., eds.) AGU Monograph 96 , pp. 263-268..

Ryan, J.G., Leeman, W.P., Morris, J.D. and Langmuir, C.H., 1996, The boron systematics of intraplate lavas: implications for crust and mantle evolution. Geochimica et Cosmochimica Acta , vol. 60, pp. 415-422.

Tenthorey, E.A., Ryan, J.G. and Snow, E.A., 1996, The petrogenesis of a sapphirine-bearing meta-troctolite in the Buck Creek ultramafic body, Clay County, N.C. Journal of Metamorphic Geology, vol. 14, pp. 103-114.

Hochstaedter, A.F., Ryan, J.G., Luhr, J.F., and Hasenake, T., 1996, On B/Be systematics of the Mexican Volcanic Belt. Geochimica et Cosmochimica Acta , vol. 60, pp. 613-628.

Noll, P.D. , Newsom, H.E., Leeman, W.P., and Ryan, J.G., 1996, The role of hydrothermal fluids in the production of subduction zone magmas: evidence from siderophile and chalcophile trace elements and boron. Geochimica et Cosmochimica Acta , vol. 60, pp. 587-611.

Ryan, J.G., Morris J.D., Tera F., Leeman W.P. and Tsvetkov A.,1995, Cross-arc geochemical variations in the Kurile island arc as a function of slab depth. Science , vol. 270, 625-628.

Bebout, G.E., Ryan, J.G., and W.P. Leeman, 1993, B-Be systematics in subduction-related metamorphic rocks: characterization of the subducted component. Geochimica et Cosmochimica Acta , vol. 57 2227-2237.

Morris, J., Ryan, J.G., and Leeman W.P., 1993, Be Isotope and B-Be investigations of the historic eruptions of Mt. Vesuvius. Journal of Volcanology and Geothermal Research , vol. 58, 345-358.

Ryan, J.G. and C.H. Langmuir,1993, The systematics of boron abundances in young volcanic rocks. Geochimica et Cosmochimica Acta vol. 57, 1489-1498.

Bebout, G.E., Ryan, J.G. and W.P. Leeman, 1991, Boron and beryllium concentrations in subduction_related metamorphic rocks of the Catalina Schist: implications for subduction-zone reycling. 1991 Report to the Director, Geophysical Laboratory , pp. 23-29.

Ryan, J.G. and C.H. Langmuir, 1988, Beryllium systematics in young volcanic rocks: implications for 10 Be. Geochimica et Cosmochimica Acta , vol. 52, pp. 237-244.

Ryan, J.G. and C.H. Langmuir, 1987, The systematics of lithium abundances in young volcanic rocks. Geochimica et Cosmochimica Acta , vol. 51, pp. 1727-1741.

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