CONVENER OF SCEINTIFIC CONFERENCES

1. Workshop on "Research Frontiers in Exploration of Non-Renewable Resources" (with A.R. Rose, H.L. Barnes, and C.W. Burnham; sponsored by NSF), The Pennsylvania State University, 1976.
2. International Conference on "The Genesis of Volcanogenic Massive Sulfide Deposits"; sponsored by NSF and JSPS, Tokyo, 1978.
3. Symposium on "New Exploration Guides for Kuroko-type Massive Sulfide Deposits"; sponsored by the Geol. Association and the Mineralogical Society of Canada), Calgary, 1981.
4. Gordon Research Conference on "Geochemistry of Ore Deposits" (with M.T. Einaudi), Colby-Sawer College, New Hampshire, 1981.
5. Symposium on "Massive Sulfides Associated with Submarine Volcanism" (sponsored by the Society of Economic Geologists), Geol. Soc. of America Ann. Mtgs., New Orleans, 1982.
6. Symposium on "Geochemistry of Ore Deposits" at the Fourth International Conference on Water-Rock Interaction, Misasa, Japan, 1983.
7. Symposium on "The Genesis of Low Temperature Ore Deposits" at the Sixth International Conference on Geochronology, Cosmochronology and Isotope Geology, Cambridge, England, 1986.
8. NATO Advanced Institute on "Geochemistry of Hydrothermal Ore-Forming Processes" (with H.L. Barnes, B. Potty, A. Arribas, and S.M.F. Sheppard; sponsored by NATO), Salamanca, Spain, 1987.
9. American Geophysical Union, Western Pacific Geophysics Meetings, Kanazawa City, Japan, August, 1990 (Program chairman for Volcanology, Geochemistry and Petrology Section).
10. International Geological Congress, 1992, Organization Committee, Program Executive Committee, 1989-92.
11. Symposium in honor of H.D. Holland, Goldschmidt Conference, Reston, 1992.
12. Astrobiology Conference, Program Committee, Washington, D.C., 2001.
13. Pardee Symposium, “Early evolution of the atmosphere, hydrosphere, and oceans: Constraints from ore deposits”, Convener, sponsored by the Geological Society of America, Geochemical Society, Society of Economic Geologists, and NASA Astrobiology Institute, Denver, 2002.
14. NSF Workshop on “Research Opportunities in Geology and Geochemistry of Mineral Deposit Systems”, Convener, Denver, 2002.
15. Symposium on Co-evolution of the biosphere, hydrosphere, and lithosphere in the early Earth, Goldshmidt Conference, Kurashiki, Japan, 2003.