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2002 Denver Annual Meeting (October 27-30, 2002)

Session No. 169
Tuesday, 29 October 2002: 1:30 PM-5:30 PM

T8. Evolution of the Early Atmosphere, Hydrosphere, and Biosphere I: Constraints from Ore Deposits

Society of Economic Geologists; Geochemical Society, NASA Astrobiology Division, GSA Geobiology and Geomicrobiology Division

 

Hiroshi Ohmoto, Stephen Kesler and Michael M. Kimberley, Advocates
Paper #
Start Time
1
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
GAUTHIER-LAFAYE, F., Centre de Géochimie de la Surface - CNRS. EOST-ULP, 1, rue Blessig, Strasbourg, 67084, France, gauthier@illite.u-strasbg.fr, gauthier@illite.u-strasbg.fr
2
1:50 PM
THE REDOX-SENSITIVE TRACE ELEMENTS, MO, U AND RE IN PRECAMBRIAN CARBONACEOUS SHALES: INDICATORS OF THE GREAT OXIDATION EVENT
YANG, Wenbo and HOLLAND, Heinrich D., Earth and Planetary Sciences, Harvard Univ, 20 Oxford Street, Cambridge, MA 02138, yang@eps.harvard.edu, yang@eps.harvard.edu
3
2:05 PM
MOLYBDENUM GEOCHEMICAL CYCLE IN THE ARCHEAN
YAMAGUCHI, Kosei E., University of Wisconsin - Madison, 1215 W. Dayton St., Madison, WI 53706, and Institute for Frontier Research on Earth Evolution, 2-15 Natsushima, Yokosuka, 237-0061, Japan and OHMOTO, Hiroshi, Astrobiology Research Center, Penn State Univ, University Park, PA 16802, kosei@geology.wisc.edu, kosei@geology.wisc.edu
4
2:20 PM
IRON FORMATIONS: WHY THE MYSTERY PERSISTS
KIMBERLEY, Michael M., Marine, Earth, and Atmospheric Sciences, NC State Univ, Box 8208 NC State University, Raleigh, NC 27695-8208, kimberley@ncsu.edu, kimberley@ncsu.edu
5
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
PETER, Jan M., Mineral Resources Division, Geol Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada, jpeter@nrcan.gc.ca, jpeter@nrcan.gc.ca
6
2:50 PM
INFLUENCE OF THE MICROBIAL IRON CYCLE ON BIF DEPOSITION
BROWN, D. Ann, A & A Research, Old Moorcocks, Rushlake Green, Heathfield, TN21 9PP, United Kingdom, ann@a2-research.fsnet.co.uk, ann@a2-research.fsnet.co.uk
7
3:05 PM
COULD BACTERIA FORM PRECAMBRIAN BANDED IRON FORMATIONS?
KONHAUSER, Kurt O., Earth and Atmospheric Sciences, Univ of Alberta, Edmonton, AB T6G 2E3, Canada, kurtk@ualberta.ca, kurtk@ualberta.ca
8
3:20 PM
COULD CYANOBACTERIA HAVE PROVIDED THE SOURCE OF OXIDANTS FOR BANDED IRON FORMATION?
BLANK, Carrine, Earth and Planetary Sciences, Washington Univ, Campus Box 1169, One Brookings Drive, St. Louis, MO 63130-4899, blank@levee.wustl.edu, blank@levee.wustl.edu
9
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
JOHNSON, Clark1, BEARD, Brian1, WELCH, Sue1 and RODEN, Eric2, (1)Geology & Geophysics, Univ of Wisconsin, Madison, WI 53706, (2)Biological Sciences, Univ of Alabama, Tuscaloosa, AL 35487, clarkj@geology.wisc.edu, clarkj@geology.wisc.edu
10
3:50 PM
THE ECOSYSTEMS IN SUBMARINE HYDROTHERMAL ENVIRONMENTS OF THE CANADIAN SHIELD 2.7 BILLION YEARS AGO
WATANABE, Yumiko and OHMOTO, Hiroshi, Astrobiology Research Center & Dept. of Geosciences, The Pennsylvania State Univ, 435 Deike Bldg, University Park, PA 16802, yumiko@geosc.psu.edu, yumiko@geosc.psu.edu
11
4:05 PM
SUPERGENE AND HYPOGENE HEMATITIZATION EVENTS ASSOCIATED WITH PALEOPROTEROZOIC IRON AND MANGANESE ORES, SOUTH AFRICA
EVANS, David A.D.1, BEUKES, Nicolas J.2, GUTZMER, Jens2 and KIRSCHVINK, Joseph L.3, (1)Tectonics Special Research Centre, Dept of Geology and Geophysics, Yale Univ, P.O. Box 208109, New Haven, CT 06520-8109, (2)Department of Geology, Rand Afrikaans Univ, P.O. Box 524, Auckland Park, 2006, South Africa, (3)Geological and Planetary Sciences, Caltech, 170-25, Pasadena, CA 91125, dai.evans@yale.edu, dai.evans@yale.edu
12
4:20 PM
OXYGEN ISOTOPE GEOCHEMISTRY OF HEMATITE IN BIF-HOSTED HIGH-GRADE IRON ORES: IMPLICATIONS FOR THE COMPOSITION OF PALEOPROTEROZOIC METEORIC WATER
GUTZMER, Jens1, BEUKES, Nicolas J.1, MUKHOPADHYAY, Joydip1, PACK, Andreas2, HAYASHI, Ken-ichiro3 and SHARP, Zachary4, (1)Department of Geology, Rand Afrikaans Univ, P.O. Box 524, Auckland Park, 2006, South Africa, (2)Institut fuer Mineralogie und Geochemie, Universitaet zu Koeln, Zuelpicher Strasse 49b, Cologne, 50674, Germany, (3)Department of Mineralogy, Petrology, and Economic Geology, Tohoku Univ, Aoba-ku, Sendai, 980-8578, Japan, (4)Department of Earth and Planetary Sciences, Univ of New Mexico, Northrop Hall, 200 Yale Blvd. NE, Albuquerque, NM 87131, jg@na.rau.ac.za, jg@na.rau.ac.za
13
4:35 PM
GIANT BANDED IRON FORMATION-HOSTED PALEOPROTEROZOIC HEMATITE DEPOSITS FROM AUSTRALIA, SOUTH AFRICA AND BRAZIL: TOWARDS A UNIFIED MODEL
BARLEY, Mark E., School of Earth and Geographical Sciences, The Univ of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia, mbarley@geol.uwa.edu.au, mbarley@geol.uwa.edu.au
 
4:55 PM
Discussion
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