2004 Denver Annual Meeting (November 7–10, 2004)

Session No. 82
Monday, 8 November 2004: 8:00 AM-12:00 PM

T74. 1500 to 2500 Ma: A Period of Changing Mantle Regimes in Earth History?

Precambrian [At Large]; GSA Geophysics Division

 

Kent C. Condie, Dallas Abbott and Alex Pavlov, Advocates
Paper #
Start Time
1
8:00 AM
GROWTH OF CONTINENTAL CRUST BETWEEN 2.5 AND 1.2 GA AS CONSTRAINED BY ND AND HF ISOTOPES
CONDIE, Kent C., Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM 87801, kcondie@nmt.edu, kcondie@nmt.edu
2
8:15 AM
EVOLUTION OF TORQUE IN THE EARTH-MOON SYSTEM AS INDICATED BY INVERTEBRATE GROWTH BANDS
OLIVER, Douglas H., Department of Geology, Univ of Texas at Arlington, Arlington, TX 76019 and RONALD, Schailey, Tarrant County College, Arlington, TX 76018, doliver@uta.edu, doliver@uta.edu
3
8:30 AM
RECYCLING OF CONTINENTAL CRUST AT MODERN SUBDUCTION ZONES, IMPLICATIONS FOR PRECAMBRIAN CRUSTAL GROWTH, SUPERCONTINENT CONSTRUCTIONS, AND LITTERING THE MANTLE WITH CONTINENTAL DEBRIS
SCHOLL, David William, Geophysics, Stanford, Stanford, CA 94305 and VON HUEME, Roland, Geology, Univ of California Davis, Davis, CA 95616, dscholl@pangea.stanford.edu, dscholl@pangea.stanford.edu
4
8:45 AM
THE MID-PROTEROZOIC RAPAKIVI GRANITES WITHIN THE CONTEXT OF THE COLUMBIA SUPERCONTINENT
VIGNERESSE, Jean Louis, CREGU, UMR CNRS 7566 G2R, BP 23, Vandoeuvre-Nancy, F-54501, France, jean-louis.vigneresse@g2r.uhp-nancy.fr, jean-louis.vigneresse@g2r.uhp-nancy.fr
5
9:00 AM
SUPERCONTINENTS DURING THE PROTEROZOIC - A PALEOMAGNETIC SURVEY
PESONEN, Lauri J., Division of Geophysics, Univ of Helsinki, PO Box 64, Helsinki, 00014 and ELBRA, Tiiu, Division of Geophysics, Univ of Helsinki, PO Box 64, Helsinki, 00014, Finland, lauri.pesonen@helsinki.fi, lauri.pesonen@helsinki.fi
6
9:20 AM
POST-BUSHVELD PALEOPROTEROZOIC INTRAPLATE MAGMATISM IN SOUTHERN AFRICA
HANSON, Richard E.1, GOSE, Wulf A.2, CROWLEY, James L.3, RAMEZANI, Jahandar3, BOWRING, Samuel A.4, PANCAKE, James A.5 and MUKWAKWAMI, Joshua6, (1)Geology, Texas Christian Univ, TCU Box 298830, Fort Worth, TX 76129, (2)Department of Geosciences, Univ of Texas, Austin, Austin, TX 78712, (3)Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, (4)Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, (5)EG&G Technical Svcs, Inc, Morgantown, WV 26505, (6)Department of Geology, Univ of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe, r.hanson@tcu.edu, r.hanson@tcu.edu
7
9:35 AM
SURFACE OXIDATION STATES AND THE ARCHEAN/PROTEROZOIC TRANSITION
MOJZSIS, Stephen J. and PAPINEAU, Dominic, Department of Geological Sciences, Univ of Colorado, UCB 399, 2200 Colorado Avenue, Boulder, CO 80309-0399, mojzsis@colorado.edu, mojzsis@colorado.edu
8
9:55 AM
UPPER MANTLE OXIDATION AS A MECHANISM FOR INITIATING COUPLING BETWEEN BIOSPHERIC OXYGEN AND CARBON RESERVOIRS
BARTLEY, Julie K., Geosciences, State Univ of West Georgia, Carrollton, GA 30118 and KAH, Linda C., Department of Earth and Planetary Sciences, Univ of Tennessee, Knoxville, TN 37996, jbartley@westga.edu, jbartley@westga.edu
9
10:15 AM
LINKS BETWEEN THE EVOLUTION OF EARTH AND ITS BIOSPHERE, EVIDENCE FROM WESTERN AUSTRALIA
LINDSAY, John F., Lunar and Planetary Institute, Ctr for Advanced Space Studies, 3600 Bay Area Boulevard, Houston, TX 77598, BRASIER, Martin D., Earth Sciences Department, Oxford Univ, Parks Road, Oxford, OX1 3PR, United Kingdom and GREEN, Owen R., Earth Sciences, Oxford Univ, Parks Road, Oxford, OX1 3PR, lindsay@lpi.usra.edu, lindsay@lpi.usra.edu
10
10:30 AM
HOW WELL DO SULFUR ISOTOPES CONSTRAIN OXYGEN ABUNDANCE IN THE ANCIENT ATMOSPHERES?
PAVLOV, Alexander A., MILLS, Michael J. and TOON, Owen B., Laboratory for Atmospheric and Space Physics, Univ of Colorado at Boulder, Duane Physics Building, 392 UCB, Boulder, CO 80302, pavlov@lasp.colorado.edu, pavlov@lasp.colorado.edu
11
10:45 AM
STRUCTURAL AND TECTONIC FRAMEWORK OF >4.0 GA DETRITAL ZIRCONS FROM THE JACK HILLS BELT, NARRYER TERRANE, WESTERN AUSTRALIA
SPAGGIARI, Catherine V.1, PIDGEON, Robert T.2 and WILDE, Simon A.2, (1)Tectonics Special Research Centre, Department of Applied Geology, Curtin Univ of Technology, GPO Box U1987, Western Australia, Perth, 6845, (2)Department of Applied Geology, Curtin Univ of Technology, GPO Box U1987, Western Australia, Perth, 6845, C.Spaggiari@curtin.edu.au, C.Spaggiari@curtin.edu.au
12
11:00 AM
LATE PALEOPROTEROZOIC METEORITE IMPACT? INSIGHTS FROM THE CHAIBASA SHALE, EASTERN INDIA
MAZUMDER, Rajat, Department of Geology, Asutosh College, Kolkata, 700 026, India and ABBOTT, Dallas H., Lamont Doherty Earth Observatory of Columbia Univ, Oceanography Building, Rm 103A, 1000 Route 9W, Palisades, NY 10964, rajatmazumder2001@yahoo.com, rajatmazumder2001@yahoo.com
13
11:15 AM
CONTINTAL VS OCEANIC ASTEROID IMPACTS
DE CARLI, Paul S.1, JONES, Adrian P.2 and PRICE, G. David2, (1)Poulter Laboratory, SRI Int'l, 333 Ravenswood Ave, Menlo Park, CA 94025, (2)Geological Sciences, Univ College London, Gower Street, London, WC1E 6BT, United Kingdom, paul.decarli@sri.com, paul.decarli@sri.com
14
11:35 AM
ANTIPODAL HOTSPOTS, LARGE IGNEOUS PROVINCES, AND SEA-LEVEL CHANGES: VESTIGES OF OCEANIC LARGE-BODY IMPACTS?
HAGSTRUM, Jonathan T., U.S. Geol Survey, 345 Middlefield Rd, MS 937, Menlo Park, CA 94025, jhag@usgs.gov, jhag@usgs.gov
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