Session No. 125 Tuesday, October 29, 2002

8:00 AM-12:00 PM, Colorado Convention Center: Ballroom 2&3
K2. Evolution of the Early Atmosphere, Hydrosphere, and Biosphere: Constraints from Ore Deposits
Stephen Kesler and Hiroshi Ohmoto, Presiding
 Paper #Start Time
 8:00 AM Introductory Remarks
125-18:05 AM ORE DEPOSITS AND THE EVOLUTION OF THE ATMOSPHERE, THE OCEANS, AND THE BIOSPHERE--AN OVERVIEW: HOLLAND, Heinrich D., Earth and Planetary Sciences, Harvard Univ, 20 Oxford Street, Cambridge, MA 02138, holland@eps.harvard.edu.
125-28:35 AM JACK HILLS METACONGLOMERATE: EVIDENCE OF EARLY AND LATE ARCHEAN HYDROSPHERE: VALLEY, John W.1, CAVOSIE, A.J.1, WILDE, S.A.2, GRANT, M.2, and LIU, Dunyi3, (1) Geology, Univ. of Wisconsin, Madison, WI 53706, valley@geology.wisc.edu, (2) Curtin Univ, Bentley, 6102, Australia, (3) Chinese Acad. Geol. Sci, Beijing, China
125-39:00 AM MAGNETITE-SERIES/ILMENITE-SERIES GRANITOIDS IN SOME ARCHEAN TERRAINS IN SOUTH AFRICA: ISHIHARA, Shunso, ROBB, Laurence J., ANHAEUSSER, Carl R., and IMAI, Akira, Geol Survey of Japan, AIST Central 7, Tsukuba, 305-8567, Japan, s-ishihara@aist.go.jp
125-49:25 AM WITWATERSRAND PALEOPLACER MINERALOGY AS AN INDICATOR OF THE ARCHEAN ATMOSPHERE: MINTER, W.E.L., Geological Sciences, Univ of Cape Town, Pvt. Bag, Rondebosch, Cape Town 7701 South Africa, welm@geology.uct.ac.za.
125-59:50 AM THE WITWATERSRAND LEGACY: WHAT DOES IT MEAN FOR EARLY EVOLUTION OF THE EARTH'S ATMOSPHERE?: LAW, Jonathan, PO Box 147, South Melbourne, Victoria, 3205, Australia, law_jonathan@hotmail.com and PHILLIPS, G. Neil, Division of Exploration and Mining, CSIRO, c/- PO Box 3, Central Park, Victoria, 3145, Australia
125-610:15 AM PISOLITIC IRONSTONE AND FERRICRETE IN THE 2.22 - 2.4 GA TIMEBALL HILL FORMATION, TRANSVAAL SUPERGROUP: IMPLICATIONS FOR THE HISTORY OF ATMOSPHERIC OXYGEN: BEUKES, N.J., DORLAND, H.C., and GUTZMER, J., Geology, Rand Afrikaans Univ, Box 524, Auckland Park, 2006, South Africa, njb@na.rau.ac.za
125-710:40 AM VOLCANOGENIC MASSIVE SULFIDES THROUGH TIME: FRANKLIN, James M., Franklin Geosciences Ltd, 24 Commanche Dr, Ottawa, ON K2E 6E9, Canada, jfranklin4@compuserve.com and HANNINGTON, Mark, Mineral Resources Division, Geol Survey of Canada, 601 Booth St, Ottawa, ON K1A 0E8, Canada
125-811:05 AM BIOMEDIATION IN IRONFORMATION GENESIS SINCE THE EARLY ARCHEAN: GROSS, Gordon A., Geol Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8 Canada, ggross@nrcan.gc.ca.
125-911:30 AM BANDED IRON FORMATIONS AS GUIDES FOR THE HISTORY OF THE LITHOSPHERE, ATMOSPHERE, AND HYDROSPHERE: OHMOTO, Hiroshi, Astrobiology Research Center & Dept. of Geosciences, The Pennsylvania State Univ, 435 Deike Bldg, University Park, PA 16802, ohmoto@geosc.psu.edu.

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