Stephen R. Sutton Senior Scientist Department of the Geophysical Sciences 5620 S. Ellis Ave. ACC 201 Chicago, IL 60637 USA Phone: 773/702-9930 E-mail: sutton@cars.uchicago.edu Publications

The focus of my research is the development and application of synchrotron x-ray microanalysis instrumentation and methods for trace element quantification using the x-ray fluorescence microprobe and chemical speciation determinations using x-ray absorption fine structure spectroscopy. Research problems include the chemical evolution of primitive extraterrestrial materials, particularly interplanetary dust particles; speciation and mobility of toxic and radioactive species in the contaminated soils; and direct determination of the oxidation states of minerals and glasses.

Synchrotron radiation facilities in Illinois and New York are the foci of instrumentation development. At the Advanced Photon Source , Argonne National Laboratory , IL, I am co-Project Manager (with Mark Rivers, also of the Department of Geophysical Sciences) for the GeoSoilEnviroCARS Sector (13), a national earth science user facility funded by NSF-EAR, DOE-Geosciences and the W. M. Keck Foundation and part of the Consortium for Advanced Radiation Sources (CARS). Four experimental stations are currently being commissioned which will give earth scientists access to the following techniques: diffraction (microcrystal, powder, surface), high pressure studies (diamond anvil cell, and multianvil press), fluorescence microprobe, microtomography, and x-ray absorption fine structure spectroscopy (bulk, microbeam, liquid and solid surfaces).

At the National Synchrotron Light Source, Brookhaven National Laboratory , Long Island, NY, a dedicated x-ray microprobe beamline (X26A) is being utilized for a wide variety of earth science research. In addition to conducting my own research there, as Spokesperson I manage the beamline on behalf of the Participating Research Team (PRT) which currently includes the University of Chicago, Brookhaven National Laboratory (Environmental Science Department), and the University of Georgia - Savannah River Ecology Laboratory. Earth scientists from other institutions gain access to the microprobe through collaborations with PRT members or as independent investigators.

Education:

• Ph. D., Washington University, St. Louis, Mo., 1984