T169 Evolution of the Early Atmosphere, Hydrosphere, and Biosphere I: Constraints from Ore Deposits

Tuesday, 29 October 2002
1:30 PM - 5:30 PM

Presentations

• 1:30 PM
  NATURAL NUCLEAR FISSION REACTORS: TIME CONSTRAINTS FOR OCCURRENCE, AND THEIR RELATION TO URANIUM AND MANGANESE DEPOSITS AND TO THE EVOLUTION OF THE ATMOSPHERE
  F. Gauthier-Lafaye, Centre de Géochimie de la Surface - CNRS. EOST-ULP, Strasbourg, N/A
  38943 (Technical Sessions)
• 1:50 PM
  THE REDOX-SENSITIVE TRACE ELEMENTS, MO, U AND RE IN PRECAMBRIAN CARBONACEOUS SHALES: INDICATORS OF THE GREAT OXIDATION EVENT
  Wenbo Yang, Harvard Univ, Cambridge, MA and Heinrich D. Holland, Harvard Univ, Cambridge, MA
  41033 (Technical Sessions)
• 2:05 PM
  MOLYBDENUM GEOCHEMICAL CYCLE IN THE ARCHEAN
  Kosei E. Yamaguchi, and Institute for Frontier Research on Earth Evolution, Yokosuka, N/A and Hiroshi Ohmoto, Penn State Univ, University Park, PA
  44043 (Technical Sessions)
• 2:20 PM
  IRON FORMATIONS: WHY THE MYSTERY PERSISTS
  Michael M. Kimberley, NC State Univ, Raleigh, NC
  41070 (Technical Sessions)
• 2:35 PM
  ORDOVICIAN AND EARLY MISSISSIPPIAN IRON FORMATIONS ASSOCIATED WITH VOLCANIC-HOSTED MASSIVE SULFIDE DEPOSITS, BATHURST, NEW BRUNSWICK AND FINLAYSON LAKE AREA, YUKON: CONSTRAINTS ON DEPOSITIONAL SETTING AND MINERALIZING CONDITIONS
  Jan M. Peter, Geol Survey of Canada, Ottawa, ON
  45161 (Technical Sessions)
• 2:50 PM
  INFLUENCE OF THE MICROBIAL IRON CYCLE ON BIF DEPOSITION
  D. Ann Brown, A & A Research, Heathfield, N/A
  39327 (Technical Sessions)
• 3:05 PM
  COULD BACTERIA FORM PRECAMBRIAN BANDED IRON FORMATIONS?
  Kurt O. Konhauser, Univ of Alberta, Edmonton, AB
  43056 (Technical Sessions)
• 3:20 PM
  COULD CYANOBACTERIA HAVE PROVIDED THE SOURCE OF OXIDANTS FOR BANDED IRON FORMATION?
  Carrine Blank, Washington Univ, St. Louis, MO
  46069 (Technical Sessions)
• 3:35 PM
  IRON ISOTOPE FRACTIONATION IN THE SYSTEM FE(III)-FE(II)-HEMATITE-MAGNETITE-FE CARBONATE, AND IMPLICATIONS FOR THE ORIGIN OF BANDED IRON FORMATIONS
  Clark Johnson, Univ of Wisconsin, Madison, WI and Brian Beard, Univ of Wisconsin, Madison, WI and Sue Welch, Univ of Wisconsin, Madison, WI and Eric Roden, Univ of Alabama, Tuscaloosa, AL
  44349 (Technical Sessions)
• 3:50 PM
  THE ECOSYSTEMS IN SUBMARINE HYDROTHERMAL ENVIRONMENTS OF THE CANADIAN SHIELD 2.7 BILLION YEARS AGO
  Yumiko Watanabe, The Pennsylvania State Univ, University Park, PA and Hiroshi Ohmoto, The Pennsylvania State Univ, University Park, PA
  44167 (Technical Sessions)
• 4:05 PM
  SUPERGENE AND HYPOGENE HEMATITIZATION EVENTS ASSOCIATED WITH PALEOPROTEROZOIC IRON AND MANGANESE ORES, SOUTH AFRICA
  David A.D. Evans, Yale Univ, New Haven, CT and Nicolas J. Beukes, Rand Afrikaans Univ, Auckland Park, N/A and Jens Gutzmer, Rand Afrikaans Univ, Auckland Park, N/A and Joseph L. Kirschvink, Caltech, Pasadena, CA
  46549 (Technical Sessions)
• 4:20 PM
  OXYGEN ISOTOPE GEOCHEMISTRY OF HEMATITE IN BIF-HOSTED HIGH-GRADE IRON ORES: IMPLICATIONS FOR THE COMPOSITION OF PALEOPROTEROZOIC METEORIC WATER
  Jens Gutzmer, Rand Afrikaans Univ, Auckland Park, N/A and Nicolas J. Beukes, Rand Afrikaans Univ, Auckland Park, N/A and Joydip Mukhopadhyay, Rand Afrikaans Univ, Auckland Park, N/A and Andreas Pack, Universitaet zu Koeln, Cologne, N/A and Ken-ichiro Hayashi, Tohoku Univ, Sendai, N/A and Zachary Sharp, Univ of New Mexico, Albuquerque, NM
  40033 (Technical Sessions)
• 4:35 PM
  GIANT BANDED IRON FORMATION-HOSTED PALEOPROTEROZOIC HEMATITE DEPOSITS FROM AUSTRALIA, SOUTH AFRICA AND BRAZIL: TOWARDS A UNIFIED MODEL
  Mark E. Barley, The Univ of Western Australia, Western Australia, N/A
  42390 (Technical Sessions)