1. Department of Earth Sciences; University of Western Ontario; London Ontario Canada
2. Department of Earth Sciences; Brock University; St. Catharines Ontario Canada
3. Guelph-Waterloo Physics Institute; University of Guelph; Guelph Ontario Canada
4. Astromaterials Research and Exploration Science Division; NASA Johnson Space Center; Houston Texas USA
5. Cornell Center for Astrophysics and Planetary Science; Cornell University; Ithaca New York USA
6. Aerodyne Industries, Jacobs JETS Contract; NASA Johnson Space Center; Houston Texas USA
7. Planetary and Space Science Centre; University of New Brunswick; Fredericton New Brunswick Canada
8. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA