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Abstracts Deadline: July 15, 2003

T20 top Widespread Importance of Immiscible H2O-CO2 Fluids for Petrologic and Geochemical Processes in Low-to-Moderate Temperature Crustal Environments
Geochemical Society
John P. Kaszuba, Los Alamos National Lab, Los Alamos, NM; David R. Janecky, Los Alamos National Lab, Los Alamos, NM
Geochemical reaction models include CO2 as a major ligand and precipitate, but have generally neglected multiphase fluid implications. This session is intended to explore and contrast the evidence and behavior of high CO2 natural systems. ORAL and POSTER
Geochemistry, Aqueous; Petrology, Metamorphic; Geochemistry, Other
T21 top Geochemistry for Technogenesis
Viktor V. Dolin, Institute for Environmental Geochemistry, Kyiv, Ukraine; Reto Gieré, Purdue University, West Lafayette, IN; James Morris, University of South Carolina, SC
Technogeneous impact on the geochemical media. Biogeochemical cycles of pollutants. Natural attenuation. Human-caused changes of natural isotopic ratios, global carbon cycle. Application of geochemistry for thermodynamic modeling, prediction of man-caused ecosystems development, assessment of health hazards, and countermeasures against pollution. ORAL
Environmental Geoscience; Geochemistry, Aqueous; Geochemistry, Organic
T22 top Working at the Interface of Isotope Geochemistry and Ecology: A Rapidly Growing Discipline (Posters)
GSA Geobiology and Geomicrobiology Division; U.S. Geological Survey
Adrian Farmer, U.S. Geological Survey, Fort Collins, CO; Elisabeth Brouwers, U.S. Geological Survey, Denver, CO
Biologists and geoscientists are applying stable isotopes to revolutionize ecological studies. These collaborative efforts bring new insights and identify new study areas in both disciplines. This session will focus on cutting-edge techniques and applications to understand current limitations and identify future research priorities and directions. POSTER
Environmental Geoscience; Geochemistry, Organic; Geoscience Information/Communication
T23 top Ecological Stoichiometry: Elemental Cycling and Biogeochemical Interactions in Ecosystem Processes
GSA Geobiology and Geomicrobiology Division, U.S. Geological Survey
Elisabeth Brouwers, U.S. Geological Survey, Denver, CO; Jill Baron, U.S. Geological Survey, Fort Collins, CO; Ann Kinsinger, U.S. Geological Survey, Seattle, WA
Ecologists and biogeochemists are using principles of elemental interactions to understand the relationship between organisms and their environment. These relationships are complicated by the impacts of human activities. This session will utilize an element-scale approach to explore the linkages between organisms and their physical environment. ORAL
Environmental Geoscience; Geochemistry, Other; Geomicrobiology
T24 top On the Forefront of Terrestrial and Marine Organic Geochemistry: A Tribute to John I. Hedges
Geochemical Society; American Chemical Society; Geochemical Division
Stephen A. Macko, University of Virginia, Charlottesville, VA; Peggy Ostrom, Michigan State University, East Lansing, MI
This session is held in recognition of the diverse, extensive, and challenging research of John Hedges. ORAL
Geochemistry, Organic; Geochemistry, Other; Paleoclimatology/Paleoceanography
T25 top Hydrogen in Biogeochemical Systems
Geochemical Society, Organic Geochemistry Division
Michael J. Whiticar, University of Victoria, Victoria, BC; Alex L. Sessions, Woods Hole Oceanographic Institution, Woods Hole, MA
Hydrogen is the most abundant element in organic matter. This session explores advances in understanding processes, interactions, and systematics associated with the distribution of hydrogen in geomicrobial, biogeochemical, and petroleum systems. Compound-specific measurements of stable hydrogen isotopes by CF-IRMS are particularly emphasized. ORAL
Geochemistry, Organic; Geomicrobiology; Geochemistry, Aqueous
T26 top Quantitative Modeling of Petroleum Systems and Basin Processes
GSA Sedimentary Geology Division; Geochemical Society; Society for Sedimentary Geology
Kenneth E. Peters, U.S. Geological Survey, Menlo Park, CA; Martin B. Goldhaber, U.S. Geological Survey, Denver, CO
Computerized modeling can be used to reconstruct the temperature and fluid-flow histories of stratigraphic horizons. Our session provides a timely update of concepts and methods for modeling petroleum systems and groundwater or hydrothermal flow. ORAL
Geochemistry, Organic; Hydrogeology; Geochemistry, Aqueous
T27 top Cutting Edge and "Vintage" Geochemistry: Celebrating the Science and Life of Glenn Goodfriend
GSA Quaternary Geology and Geomorphology Division, GSA Archaeological Geology Division; Geochemical Society; Paleontological Society
Bonnie A.B. Blackwell, Williams College, Williamstown, MA; Paul Goldberg, Boston University, Boston, MA; Julie Brigham-Grette, University of Massachusetts, Amherst, MA
To honor Glenn Goodfriend's memory, we will extoll his many interdisciplinary scientific contributions and toast his life. ORAL and POSTER
Geochemistry, Organic; Quaternary Geology/Geomorphology; Marine/Coastal Science
T28 top Great Ideas for Problem-Based Instruction and Assessment in the Undergraduate Geosciences (Posters)
National Association of Geoscience Teachers; GSA Geoscience Education Division
Thomas J. Hollis, Cuesta College and Atascadero High School, San Luis Obispo, CA
Problem-based instruction and assessment involves providing students with basic data and having them develop and analyze the data and provide interpretation. This poster session showcases original, problem-based geoscience exercises. Attending geoscience instructors will be able to gather original, classroom-tested ideas and materials. POSTER
Geoscience Education
T29 top In Our Own Backyards: Undergraduate Research in a Local Context (Posters)
Geology Section of the Council on Undergraduate Research
Edward C. Hansen, Hope College, Holland, MI; Karen H. Fryer, Ohio Wesleyan University, Delaware, OH
Are there advantages to involving undergraduates in local research problems? What makes such projects successful? How can they be developed and funded? These and similar questions will be addressed in posters highlighting research with a community, campus, or other local emphasis. POSTER
Geoscience Education

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