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Geoffrey S Ellis

Geoffrey Ellis is a petroleum geochemist with the Energy Resources Program (ERP) of the US Geological Survey. He manages the sealed tube and hydrous pyrolysis laboratories within the Central Energy Resources Science Center.

Geoffrey Ellis' research interests encompass the areas of organic-inorganic interactions in petroleum systems, gas isotope geochemistry, and the controls on sedimentary organic geochemistry in aquatic environments. He has published extensively on the process of thermochemical sulfate reduction and its impact on petroleum geochemistry. He is also actively investigating the application of compound-specific sulfur isotope analysis to problems in petroleum and organic geochemistry. He also has ongoing research projects involving clumped and position specific isotope analysis of hydrocarbons and organosulfur compounds and their relation to petroleum formation processes.


Professional Experience

  • 2006-Present: Research Geologist, Energy Resources Program, USGS

  • 2003-2006: Postdoctoral Fellow, Division of Chemistry & Chemical Engineering, California Institute of Technology

  • 1996-2003: Graduate Research Assistant, Rosenstiel School of Marine and Atmospheric Science, University of Miami

  • 1994-1996: Consulting Petroleum Geochemist, Venezuela

  • 1991-1994: Physical Scientist, Nation Research Program, Water Resources Division, USGS

  • 1988-1990: Geochemist, Northeast Research Institute

Education and Certifications

  • Ph.D., Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Science, University of Miami

  • M.S., Geochemistry, Colorado School of Mines

  • B.A., Geological Sciences, Cornell University

Affiliations and Memberships*

  • Affiliate faculty Department of Geology and Geological Engineering, Colorado School of Mines

  • Member American Association of Petroleum Geologists, European Association of Organic Geochemists, Geochemical Society, Geological Society of America

  • Member Association of Afro-Asian Petroleum Geochemists, Latin American Association of Organic Geochemistry

  • Member of the “Committee on Research” of the American Association of Petroleum Geologists (2009-present)

  • Vice-chairman of the executive council of the Association of Afro-Asian Petroleum Geochemists

  • Founding member of the editorial board of the journal Petroleum Research

  • Member of the editorial board of the English-language version of the journal Acta Petrolei Sinica

  • Member of the editorial board of the journal Journal of Natural Gas Geoscience

  • Member of the editorial board of the journal Unconventional Resources

Science and Products

*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government