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ConocoPhillips School of Geology & GeophysicsOU homepageConocoPhillips School of Geology & Geophysics

Megan E. Elwood Madden

Michael H Engel

Associate Professor
Stubbeman-Drace Presidential Professor of Geology and Geophysics

Ph.D., 2005 Virginia Tech
B.S., 2000 University of Illinois Urbana-Champaign

Office: SEC 950
Phone: 405-325-1563
Fax: 405-325-3140
E-mail: melwood@ou.edu

Areas of Interest

Earth and Planetary Geochemistry

Research

Fluids, particularly water, play an integral role in the evolution of terrestrial and planetary environments. By examining the geochemistry and mineralogy that results from hydrosphere-lithosphere-atmosphere interactions, Dr. Elwood Madden's  research aims to broaden our understanding of the role of water and other fluids in shaping near-surface environments on Earth, Mars, and other terrestrial planets and address the role of fluids in the geochemical evolution of these complex systems.  Current research projects focus on the geochemistry of near-surface water and weathering products on Earth and Mars, as well as the geology and geochemistry of gas hydrates in ocean sediments, permafrost, and planetary materials.

Courses Taught

Principles of Geochemistry

GeoWriting

Physical Geology for Scientists and Engineers

Planetary Geology

Selected Publications

Ambuehl D, Elwood Madden ME (2014) CO2 Hydrate formation and dissociation rates: Application to Mars.  Icarus, v. 234, 45-52.

Marra KR, Soreghan GS, Elwood Madden ME, Keiser LJ, Hall BL (2014) Trends in Grain Size and Surface Area in Cold-Arid vs Warm Semi-Arid Fluvial Systems. Geomorphology, v. 206, 483-491.

Kendall MR, Madden AS, Elwood Madden ME, Hu Q (2013) Rates and products of arsenojarosite dissolution¸ Geochimica et Cosmochimica Acta, 112, 192-207.

Lin B, Cerato AB, Madden AS, and Elwood Madden ME (2013) Microscopic Analysis of the Effect of Fly Ash on the Hydromechanical Alterations of Two Expansive Soils from Oklahoma. Environmental & Engineering Geoscience19, 85-94.

Mousis O, Chassefiere E, Chevrier V, Elwood Madden ME, Lakhlifi A, Lunine JI, Montmessin F, Picaud S, Schmidt F, and Swindle TD (2013) Volatile trapping in Martian clathrates. Space Science Reviews, 173, 213-250.

Zahrai SK, Elwood Madden ME, Madden AS, Rimstidt JD, Miller MA (2013) Na-jarosite dissolution rates: The effect of mineral composition on jarosite lifetimes. Icarus, v. 223 438-443.

Elwood Madden ME, Madden AS, Rimstidt JD, Zahrai S, Kendall MR, and Miller MA (2012) Jarosite dissolution rates and nanoscale mineralogy, Geochimica et Cosmochimica Acta, 91, 306-321.

Gainey, S.R. and Elwood Madden, M.E. (2012) Kinetics of Methane Clathrate Formation and Dissociation Under Mars Relevant Conditions.  Icarus, 218, 513-524.

Leeman, J.  Rawn, C.J., Alford, J., Phelps, T.J., Elwood Madden, ME Interpreting Temperature Strain Data from Meso-Scale Clathrate Experiments (2012) Computers and Geosciences, 38, 62-67.

Miller M.A., Madden AS, Elwood Madden ME, Elmore RD (2012) Laboratory-simulated diagenesis of nontronite, Clays and Clay Minerals 60(6), 616-632.

Pritchett, B.N., Elwood Madden ME, Madden AS (2012) Effects of water and chloride activity on jarosite dissolution rates and maximum lifetimes in high salinity brines: Implications for Earth and Mars, Earth and Planetary Science Letters, 357-358: 327-336.

Root, M.J. and Elwood Madden, M.E. (2012) Potential Effects of Obliquity Change on Gas
Hydrate Stability Zones on Mars. Icarus, 218, 534-544.

Stumpf AR, Elwood Madden ME, Soreghan GS, Hall BL (2012)  Chemical weathering within glacial melt water streams, Wright and Taylor Valley, Antarctica. Chemical Geology, 322-323, 79-90.