Megan E. Elwood Madden

Assistant Professor

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, my 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. Within this broad research theme, I am working on a variety of projects that focus on the geochemistry of surface water on Mars, the geologic constraints on methane hydrate formation in ocean sediments, the effects of in situ oil shale retorting methods on groundwater quality, and methods to analyze samples of extraterrestrial water trapped in meteorites.

Courses Taught

Principles of Geochemistry

GeoWriting

Physical Geology for Scientists and Engineers

Special Topics in Planetary Geology

Faculty Web Page

http://faculty-staff.ou.edu/E/Megan.E.Elwood.Madden-1/

Selected Publications

Elwood Madden, M.E., S.M. Ulrich, T.C. Onstott, and T.J. Phelps (2007) Salinity-induced hydrate dissociation: a mechanism for recent methane release on Mars. Geophysical Research Letters.

Elwood Madden, M.E., D. A. Kring, and R. J. Bodnar (2006) Shock re-equilibration of fluid inclusions in crystalline basement rocks from the Ries Crater, Germany. Meteoritics and Planetary Sciences 41, n. 2, 247-262.

Elwood Madden, M.E., D. Kring, and R.J. Bodnar, (2006) Shock reequilibration of fluid inclusions in Coconino Sandstone from Meteor Crater, Arizona. Earth and Planetary Science Letters 241, 32-46.

Elwood Madden, M.E., R.J Bodnar, and J.D. Rimstidt (2004) Jarosite as geochemical indicator of water-limited chemical weathering on Mars. Nature, 431, 821-823.

Elwood Madden, M.E., F. Horz, and R. J. Bodnar (2004) Experimental simulation of shock reequilibration of fluid inclusions during meteorite impact. Canadian Mineralogist, 42, 1357-1368.

	School of Geology and Geophysics
Prospective Undergraduates What are Geology and Geophysics? What do Geologists and Geophysicists do? Why do we need Geologists and Geophysicists? You might be a Geologist or Geophysicist if you... Why study Geology and Geophysics at OU? Scholarships Degrees Offered Areas Of Emphasis Prospective Graduate Students Areas of Emphasis Degrees Offered Admissions Assistantships and Fellowships Successful Graduates Field Trips Recruiting Current Students Student Organizations Geology Courses Geophysics Courses OU Course Catalog CEE Student Services Registration Degree Navigator Mission People Faculty Staff Students Research Areas of Emphasis Laboratories Alumni School Policies, Forms, and Archives	Megan E. Elwood Madden Assistant Professor 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, my 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. Within this broad research theme, I am working on a variety of projects that focus on the geochemistry of surface water on Mars, the geologic constraints on methane hydrate formation in ocean sediments, the effects of in situ oil shale retorting methods on groundwater quality, and methods to analyze samples of extraterrestrial water trapped in meteorites. Courses Taught Principles of Geochemistry GeoWriting Physical Geology for Scientists and Engineers Special Topics in Planetary Geology Faculty Web Page http://faculty-staff.ou.edu/E/Megan.E.Elwood.Madden-1/ Selected Publications Elwood Madden, M.E., S.M. Ulrich, T.C. Onstott, and T.J. Phelps (2007) Salinity-induced hydrate dissociation: a mechanism for recent methane release on Mars. Geophysical Research Letters. Elwood Madden, M.E., D. A. Kring, and R. J. Bodnar (2006) Shock re-equilibration of fluid inclusions in crystalline basement rocks from the Ries Crater, Germany. Meteoritics and Planetary Sciences 41, n. 2, 247-262. Elwood Madden, M.E., D. Kring, and R.J. Bodnar, (2006) Shock reequilibration of fluid inclusions in Coconino Sandstone from Meteor Crater, Arizona. Earth and Planetary Science Letters 241, 32-46. Elwood Madden, M.E., R.J Bodnar, and J.D. Rimstidt (2004) Jarosite as geochemical indicator of water-limited chemical weathering on Mars. Nature, 431, 821-823. Elwood Madden, M.E., F. Horz, and R. J. Bodnar (2004) Experimental simulation of shock reequilibration of fluid inclusions during meteorite impact. Canadian Mineralogist, 42, 1357-1368.