My research at the University of Michigan has emphasized the application of radiogenic isotope tracers to problems in marine geology and paleoceanography. Areas of interest:

• Geochemical and isotopic studies of the sedimentary system, weathering rates, chemical cycling, chemostratigraphy, atmospheric dust, basin analysis and continental drainage, paleogeography and paleoclimate, marine hydrothermal activity, ocean circulation, paleoceanography of polar oceans.
• Meteoritics, planetary geology, cosmochemistry, crustal evolution and the early Earth, hydrothermal mineral deposits.
• Mercury and calcium isotopes as environmental tracers.

Recent Publications:

Gleason, J.D., D.J. Thomas, T.C. Moore Jr., R.M. Owen, J.D. Blum, B.A. Haley (accepted) Early to middle Eocene history of the Arctic Ocean from Nd-Sr isotopes in fossil fish debris, Lomonosov Ridge (Paleoceanography).

Stancin, A. M., J. D. Gleason, R. M. Owen, D. K. Rea, and J. D. Blum (2008) Piston core record of Late Paleogene (31 Ma) to recent seafloor hydrothermal activity in the Southwest Pacific Basin. Paleoceanography, v. 23, doi:10.1029/2006PA001406.

Stancin, A.M., Gleason, J. D., Rea, D. K., Owen, R.M., Moore, T.C., Jr., Blum, J.D., Hall, C.M., Hovan, S.A. (2008) Miocene to recent eolian dust record from the Southwest Pacific Ocean at 40 S latitude. Palaeogeography, Palaeoclimatology, Palaeoecology. v. 261, p. 218-233.

Gleason, J.D., Gehrels, G. E., Dickinson, W.R., Patchett, P.J. (2007) Laurentian sources for detrital zircon grains in turbidite and deltaic sandstones of the lower to middle Pennsylvanian Haymond Formation, Marathon assemblage, West Texas, USA. Journal of Sedimentary Research, v. 77, p. 888-900.

Gleason, J.D., Finney, S.C., Peralta, S., Gehrels, G.E., Marsaglia, K. (2007) Zircon and whole rock Nd-Pb isotopic provenance of Middle and Upper Ordovician siliciclastic rocks, Argentine Precordillera. Sedimentology, v. 54, p. 107-136.

Stancin, A., Gleason, J. D., Rea, D. K., Owen, R.M., Moore, T.C., Jr., Blum, J.D., Hovan, S.A. (2006) Radiogenic isotope mapping of late Cenozoic eolian and hemipelagic sediment distribution in the east-central Pacific. Earth and Planetary Science Letters, v. 248, p. 840-850.

Hassold, N., Rea, D.K., van der Pluijm, B.A., Pares, J., Gleason, J.D., and Ravelo, A.C. (2006) Late Miocene to Pleistocene paleoceanographic records from the Feni and Gardar Drifts: Pliocene reduction in abyssal flow. Palaeogeography, Palaeoclimatology, Palaeoecology, v. 236, p. 290-301.

Latimer, J.C., Filippelli, G.M., Hendy, I.L., Gleason, J.D. and Blum, J.D. (2006) Glacial/Interglacial terrigenous provenance in the Southeastern Atlantic Ocean: The importance of deep water sources and surface currents. Geology, v. 34, p. 545-548.

Rea, D.K., Lyle, M.W., Liberty, L.M., Hovan, S.A., Bolyn, M.P., Gleason, J.D., Hendy, I.L., Latimer, J.C., Murphy, B.M., Owen, R.M., Paul, C.F., Rea, C.F., Stancin, A.M., Thomas, D.J. (2006) The South Pacific Latitudinal Transect (SPLAT) Survey and Coring Team, Broad region of no sediment in the Southwest Pacific Basin. Geology, v. 34, p. 873-876.

Gleason, J. D., Moore, T. C., Johnson, T. M., Rea, D. K., Blum, J. D., Owen, R. M., J. Pares, and Hovan, S. A. (2004) Age calibration of piston core EW9709-07, equatorial central Pacific, using fish teeth Sr isotope stratigraphy: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 212, p. 355-366.

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