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Jim Walker

Research Interests

Igneous Petrology/Geochemistry, Volcanology, Magmas, Subduction Zones, Central America

Research Activities

My major research focus concerns magma production and evolution at subduction zones and the surface volcanism that results. My pet subduction zone is the Central American subduction zone which exhibits some of most diverse and abundant volcanic activity on Earth. 


Selected Publications

Walker, J.A., Teipel, A.P., Ryan, J.G. and Syracuse, E., 2009, Light elements and Li isotopes across the northern portion of the Central American subduction zone: Geochemistry, Geophysics and Geosystems, v. 10, Q06S16, doi:10.1029/2009GC002414.

Walker, J.A., Mickelson, J.E., Thomas, R.B., Patino, L.C., Cameron, B.I., Carr, M.J., Feigenson, M.D. and Edwards R.L., 2007, U-series disequilibria in Guatemalan lavas, crustal contamination and implications for magma genesis along the Central American subduction zone: Journal of Geophysical Research, V. 112, B06205, doi:10.1029/2006JB004589.

de Leeuw, G.A.M., Hilton, D.R., Fischer, T.P. and Walker J.A., 2007, The He-CO2 isotope and relative abundance characteristics of geothermal fluids in El Salvador and Honduras: new constraints on volatile mass balance of the Central American volcanic arc: Earth and Planetary Science Letters, v. 258, p. 132-146.

Elkins, L.J., Fischer, T.P., Hilton, D.R., Sharp, Z.D., McKnight, S. and Walker, J., 2006, Tracing nitrogen in volcanic and geothermal volatiles from the Nicaraguan volcanic front: Geochimica et Cosmochimica Acta, v. 70, p. 5215-5235.

Cameron, B.I. and Walker, J.A., 2006, Diverse volcanism in southeastern Guatemala: the role of crustal contamination: in Rose, W.I., Bluth, G.J.S., Carr, M.J., Ewert, J.W., Patino, L.C. and Vallance, J.W., eds., Volcanic Hazards in Central America: Geological Society of America Special Paper 412, p. 121-139.

Walker, J.A., Templeton, S. and Cameron, B.I., 2006, The chemistry of spring waters and fumarolic gases encircling Santa María volcano, Guatemala: insights into regional hydrothermal activity and implications for volcano monitoring: in Rose, W.I., Bluth, G.J.S., Carr, M.J., Ewert, J.W., Patino, L.C. and Vallance, J.W., eds., Volcanic Hazards in Central America: Geological Society of America Special Paper 412, p. 59-83.

Professor
Igneous Petrology/Geochemistry, Volcanology

815-753-7936
E-mail: jwalker@niu.edu
412A Davis Hall

Education

Ph.D., Rutgers University, 1982
M.S., Rutgers University, 1980 B.S., Upsala College, 1975

Contact Us

Geology and Environmental Geosciences
Davis Hall 312

815-753-1943 (tel)
815-753-1945 (fax)

askgeology@niu.edu