EDWARD M. RIPLEY

Professor of Geochemistry
Department of Geological Sciences, Indiana University
1001 E. 10 th St. , Bloomington IN 47405
phone: 812-855-1196; fax:812-855-7961
ripley@indiana.edu

Education:

B.S., Geology, Illinois State University, Normal, Illinois, 1971
M.S., Geology, University of Minnesota, Duluth, Minnesota,1973
Ph.D., Geochemistry, The Pennsylvania State University, University Park, Pennsylvania, 1976

Master's Thesis:

"The Ore Petrology and Structural Geology of the Deer Lake Mafic-Ultramafic Complex, Effie, Itasca County, Minnesota" Major: geology; minor: petrology; advisor:  Dr. D. M. Davidson

Dissertation:

"Mineralogic, Fluid Inclusion, and Stable Isotope Studies of the Stratabound Copper Deposits at the Raul Mine, Peru, South America" Major: geochemistry; advisor:  Dr. H. Ohmoto

Professional Societies:

Society of Economic Geologists
Mineralogical Association of Canada
Phi Kappa Phi
Geological Society of America
Geochemical Society

Professional Experience:

6/1972 - 9/1972, Exxon, Minerals Corporation, Exploration geologist
6/1973 - 9/1973, United States Steel Corporation, Exploration geologist
6/1974 - 9/1974, United States Steel Corporation, Geologist, exploration and drilling
6/1992 - 9/1992, Chemical Lime Company, Exploration Geologist
8/1976 - 6/1981, Assistant Professor, Indiana University
7/1981 - 6/1988, Associate Professor, Indiana University
7/1988 - present, Professor, Indiana University
9/1976 - present, Consulting with various mining and research companies

Graduate Student Supervision:

1976-2004: 19 M.S. students, 10 Ph.D. students
Current: 4 Ph.D. students, 2 M.S. students, 1 Post-doctoral student

Research Interests:

Biogeochemistry, stable istopic fractionation at low and moderate (hydrothermal) temperatures, metal enrichment in organic-rich systems. My research interests center on stable isotopic fractionation at low and moderate (hydrothermal) temperatures, as well as metal enrichment in organic-rich systems.

Lefticariu, L., Pratt, L. M., Ripley E. M. (2005). Pyrite oxidation using millimolar H2O2 as an analog for radiation-induced chemical reactions in groundwater. Annual GSA Meeting, Salt Lake City, Utah, USA.

Lefticariu, L., Pratt, L. M., Ripley E. M., Bish D. L. (2005). Experimental study of sulfur isotope fractionation associated with pyrite oxidation by H2O2. Goldschmidt Conference, Moscow, Idaho, USA.

Lefticariu, L., Pratt, L. M., Ripley E. M., Bish D. L. (2005). Unexpected sulfur isotope fractionation associated with pyrite oxidation by hydrogen peroxide at temperatures from 4 to 150°C. NASA Astrobiology Institute Biennial Meeting, Boulder, CO.

Recent Projects:

1. Experimental studies of sulfur and oxygen isotopic fractionation associated with radiolytic oxidation of pyrite. This work has ramifications both for early Earth evolution and for Mars. These studies are part of a spectrum of work being done by the Indiana-Princeton-Tennessee NASA Astrobiology Research Institute