7fcde7 square The Department of Oceanography at the University of Hawaii at Manoa, SOEST
Michael J. Mottl


Department of Oceanography
University of Hawai`i at Manoa
1000 Pope Road 
Marine Sciences Building
Honolulu, HI 96822
Phone: (808) 956-7006
Fax: (808) 956-9225

E-mail: mmottl@soest.hawaii.edu



  • B.S. 1970- Geology, Michigan State University
  • M.A. 1972- Geology, Princeton University
  • Ph.D. 1976- Geology, Harvard University

Research Interests

  • Geochemical cycles
  • Geochemical implications of plate tectonics
  • Interaction of seawater with the oceanic crust
  • Fluids in subduction zones

Teaching Activites

  • OCN 201- Science of the Sea
  • OCN 622- Geological Oceanography
  • OCN 623- Chemical Oceanography
  • OCN 310- Global Environmental Change


Selected Publications

Mottl, M.J., and H.E. Elderfield (eds.) (2013) The Oceans and Marine Chemistry. Vol. 7 of the Treatise on Geochemistry, 2nd edition (K.K Turekian and H.D. Holland, Exec. Editors), Elsevier.

Mottl, M.J. (2012) VentDB: an online database of hydrothermal vent chemistry. Available online at:

Mottl, M.J., J.S. Seewald, C.G. Wheat, M.K. Tivey, P.J. Michael, G. Proskurowski, T.M. McCollom, E. Reeves, J. Sharkey, C.-F. You, L.-H. Chan, and T. Pichler (2011) Chemistry of hot springs along the Eastern Lau Spreading Center. Geochim. Cosmochim. Acta 75:1013-1038.

Mottl, M.J., B.T. Glazer, R.I. Kaiser, and K.J. Meech (2007)  Water and Astrobiology. Chemie der Erde  67:253-282.

Mottl, M.J., C.G. Wheat, P. Fryer, J.Gharib, and J.B. Martin (2004)  Chemistry of springs across the Mariana forearc shows progressive devolatilization of the subducting plate.  Geochim. Cosmochim. Acta 68:4915-4933.

Wheat, C.G., and M.J. Mottl.  Geochemical fluxes through mid-ocean ridge flanks (2004)  Ch. 19, pp.627-658, in Hydrogeology of the Oceanic Lithosphere (E.E. Davis and H.E. Elderfield, eds.), Cambridge University Press, 706p.

Mottl, M.J., S.C. Komor, P. Fryer, and C.L. Moyer.  Deep-slab fluids fuel extremophilic Archaea on a Mariana forearc serpentinite mud volcano: Ocean Drilling Program Leg 195 (2003)  Geochemistry, Geophysics, Geosystems 4(11):9009, doi:10.1029/2003GC000588, 14pp.

Mottl, M.J. (2003) Partitioning of energy and mass fluxes between mid-ocean ridge axes and flanks at high and low temperature.  In Energy and Mass Transfer in Marine Hydrothermal Systems (P.E.Halbach, V. Tunnicliffe, and J.R. Hein, eds.), pp. 271-286, Dahlem University Press, Berlin, 365 pp.

Wheat, C.G., and M.J. Mottl (2000) Composition of pore and spring waters from Baby Bare: global implications of geochemical fluxes from a ridge flank hydrothermal system. Geochim. Cosmochim. Acta64 629-642.

Mottl, M.J., G. Wheat, E. Baker, N. Becker, E. Davis, R. Feely, A. Grehan, D. Kadko, M. Lilley, G. Massoth, C. Moyer, and F. Sansone (1998) Warm springs discovered on 3.5 Ma oceanic crust, eastern  flank  of  the Juan de Fuca Ridge. Geology26 51-54.

Mottl, M.J., F.T. Sansone, C.G. Wheat, J.A. Resing, E.T. Baker, and J.E. Lupton (1995) Manganese and methane in hydrothermal plumes along the East  Pacific Rise,  8°40' to 11°50'N.  Geochim. Cosmochim. Acta59 4147-4165.

Mottl, M.J., C.G. Wheat, and J. Boulegue (1994) Timing of ore deposition and sill intrusion at Site 856: evidence from stratigraphy, alteration, and sediment pore water composition. Proc. ODP, Sci. Results139 679-693.

Mottl, M.J., Davis, E.E., Fisher, A.T., and Slack, J.F. (eds.) (1994) Proceedings of the Ocean Drilling Program, Scientific Results 139: College Station, TX, 772 pp.

Mottl, M.J., and C.G. Wheat (1994) Hydrothermal circulation through mid-ocean ridge flanks: fluxes of heat and magnesium. Geochim. Cosmochim. Acta58 2225-2237.

Mottl, M.J. (1992) Pore waters from serpentinite seamounts in the Mariana and Izu-Bonin  forearcs, Leg 125: evidence for volatiles from the subducting slab.  In Fryer, P., Pierce, J., Stokking, L.B., et al., Proc. ODP, Sci. Results125 373-385.

Mottl,  M.J., and T.F. McConachy (1990) Chemical processes in buoyant hydrothermal plumes on the East Pacific Rise near 21°N. Geochim. Cosmochim. Acta54 1911-1927.

Research Funding

  • National Science Foundation. Collaborative research: Studies of deep-sourced mud volcanism in the Mariana forearc: a DSL-120, Jason ROV, and coring program. P. Fryer and M.J. Mottl, P.I.ís. $397,888 Funded. Period 10/1/01-9/30/04
  • National Science Foundation. Collaborative research: Sampling and initial characterization of hydrothermal fluids, deposits, microfauna, and megafauna at vent fields along the Eastern Lau Spreading Center. M.J. Mottl, P.I. $105,313 Funded. Period 1/1/04-12/31/05
  • Ocean Drilling Program, U.S. Science Support Program. Composition of Pore Waters from ODP Leg 195, Sites 1200-1202, Western Pacific. M.J. Mottl, P.I. $36,835 Funded. Period 5/3/01-3/8/04