Earth and Planetary Geochemistry

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. 

Principles of Geochemistry

GeoWriting

Physical Geology for Scientists and Engineers

Planetary Geology

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

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