Earth System Processes 2 (811 August 2005)
Session No. 11 Tuesday, August 9, 2005
9:00 AM-12:00 PM, Westin Hotel: Mayfair

T11. Oxygen and Evolution on Early Earth I

David Catling and Ariel Anbar, Presiding
 Paper #Start Time
11-19:00 AM INVITED: WHEN DID OXYGEN APPEAR IN THE ATMOSPHERE?: ONO, Shuhei, Geophysical Laboratory, Carnegie Insitution of Washington, 5251 Broad Branch Rd. NW, Washington, DC 20015-1305, s.ono@gl.ciw.edu and HOLLAND, Heinrich D., Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138
11-29:40 AM GEOLOGIC EVIDENCE FOR THE EARLY DEVELOPMENTS OF AN OXYGENATED ATMOSPHERE, SULFATE-RICH OCEANS, AND DIVERSE MARINE- AND TERRESTRIAL BIOSPHERES: OHMOTO, Hiroshi and WATANABE, Yumiko, NASA Astrobiology Institute and Department of Geosciences, The Pennsylvania State University, 435 Deike Bldg, University Park, PA 16803, hqo@psu.edu
11-310:00 AM BIOGEOCHEMICAL INVESTIGATIONS OF ~3.8 GA SUPRACRUSTAL ROCKS FROM SOUTHERN WEST GREENLAND: PAPINEAU, Dominic, Department of Geological Sciences, Univ of Colorado, UCB 399, 2200 Colorado Avenue, Boulder, CO 80309-0399, Dominic.Papineau@colorado.edu and MOJZSIS, Stephen, Geological Sciences, University of Colorado at Boulder, 2200 Colorado Ave, Boulder, CO 80309-399
 10:20 AM Break
11-410:40 AM THE ABSENCE OF MASS INDEPENDENT SULFUR ISOTOPE FRACTIONATION IN ARCHEAN SEDIMENTARY ROCKS: EVIDENCE FOR AN OXIC ATMOSPHERE?: WATANABE, Yumiko, Astrobiology Research Center & Dept. of Geosciences, The Pennsylvania State Univ, 434 Deike Bldg, University Park, PA 16802, yumiko@geosc.psu.edu, KLARKE, Alice I., Astrobiology Research Center & Dept. of Geosciences, The Pennsylvania State University, 434 Deike Blgd, University Park, PA 16802, POULSON, Simon, Geological Sciences, Univ of Nevada-Reno, 1664 N. Virginia St, Reno, NV 89557-0138, and OHMOTO, Hiroshi, Astrobiology Research Center & Dept. of Geosciences, The Pennsylvania State University, 435 Deike Building, University Park, PA 16802
11-511:00 AM THE LATE ARCHEAN TO EARLY PALEOPROTEROZOIC EARTH SYSTEM AND THE RISE OF ATMOSPHERIC OXYGEN: BARLEY, Mark E., School of Earth and Geographical Sciences, The Univ of Western Australia, 35 Stirling Highway, Crawley, 6009, Australia, mbarley@segs.uwa.edu.au, BEKKER, Andrey, Geophysical Lab, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, DC 20015, and KRAPEZ, Bryan, School of Earth and Geographical Sciences, The Univ of Western Austrtalia, 35 Striling Highway, Crawley, 6009
11-611:20 AM CONSTRAINTS ON ARCHEAN OXYGEN FROM MANTLE ISOTOPE SYSTEMATICS: ANBAR, Ariel1, TACKLEY, Paul2, and WASYLENKI, Laura1, (1) Department of Geological Sciences, Arizona State Univ, Tempe, AZ 85287, anbar@asu.edu, (2) Department of Earth and Space Sciences, Univ. California Los Angeles, Los Angeles, CA 90095
11-711:40 AM A PALEOPROTEROZOIC ORIGIN OF OXYGENIC PHOTOSYNTHESIS AS A TRIGGER FOR THE MAKGANYENE SNOWBALL EARTH EVENT: KIRSCHVINK, Joseph L. and KOPP, Robert E., Division of Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Blvd, MC 170-25, Pasadena, CA 91125, rkopp@caltech.edu

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