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GSA Annual Meeting, November 5-8, 2001

Session No. 165
Thursday, 8 November 2001: 8:00 AM-12:00 PM

T6. Evolution of the Precambrian Earth

GSA Geophysics Division; GSA Structural Geology and Tectonics Division; GSA International Division

 

Walter D. Mooney, Herwart Helmstaedt, Desmond E. Moser and Irina Artemieva, Advocates
Paper #
Start Time
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8:00 AM
ARCHEAN HYDROTHERMAL ALTERATION AND METAMORPHISM OF THE PILBARA BLOCK, WESTERN AUSTRALIA
RICHARDS, I. J.1, GREGORY, R. T.2, FERGUSON, K. M.1 and DOUTHITT, C. B.3, (1)Geological Sciences, Southern Methodist Univ, Stable Isotope Laboratory, PO Box 750395, Dallas, TX 75275, (2)Department of Geological Sciences, Southern Methodist Univ, Stable Isotope Laboratory, PO Box 750395, Dallas, TX 75275, (3)Thermo-Finnigan, 9412 Rocky Branch Dr, Dallas, TX 75243, irichard@mail.smu.edu, irichard@mail.smu.edu
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8:15 AM
DEFORMATION HISTORY OF THE KENOGAMISSI BATHOLITH AND THE EASTERN SWAYZE GREENSTONE BELT
BECKER, J. K.1, BENN, K.1 and AYER, J.2, (1)Dep. of Earth Sciences, Univ of Ottawa, 140 Pasteur St, Ottawa, ON K1N 6N5, Canada, (2)Ontario Geological Survey, Ministry of Northern Development and Mines, 933 Ramsay Lake Rd, Sudbury, ON P3E6B5, Canada, becker@jkbecker.de, becker@jkbecker.de
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8:30 AM
DIRECT TIMING CONSTRAINTS ON PALEOPROTEROZOIC METAMORPHISM, SOUTHERN LAKE SUPERIOR REGION: RESULTS FROM SHRIMP AND EMP U-PB DATING OF METAMORPHIC MONAZITES
HOLM, D. K.1, SCHNEIDER, D. A.2, O'BOYLE, C.1, HAMILTON, M. A.3, JERCINOVIC, M. J.4 and WILLIAMS, M. L.5, (1)Department of Geology, Kent State Univ, Kent, OH 44242, (2)Department of Geological Sciences, Ohio Univ, Athens, OH 45701, (3)Continental Geoscience Division, Geol Survey of Canada, Ottawa, ON K1A 0E8, Canada, (4)Dept. of Geosciences, Univ. of Massachusetts, Amhurst, MA 01003, (5)Department of Geosciences, Univ of Massachusetts, Amherst, MA 01003, dholm@kent.edu, dholm@kent.edu
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8:45 AM
EARLY PALEOPROTEROZOIC (2.5–2.0 GA) GIANT SEDIMENT-HOSTED MINERAL DEPOSITS: A RESPONSE TO ENVIRONMENTAL CHANGES
BEKKER, Andrey, Department of Geological Sciences, VPI & SU, Blacksburg, VA 24061, ERIKSSON, Kenneth A., Dept. of Geological Sciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, KAUFMAN, Alan Jay, Department of Geology, Univ of Maryland, College Park, College Park, MD 20742 and KARHU, Juha A., Department of Geology, Univ of Helsinki, P.O. BOX 96, Helsinki, FIN-00014, Finland, abekker@vt.edu, abekker@vt.edu
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9:00 AM
A POSSIBLE ARCHEAN CLIMATE FEEDBACK MECHANISM
RYE, Rob, Division of Geological and Planetary Sciences, California Institute of Techology, MC 170-25, 1200 E California Blvd, Pasadena, CA 91125, rye@gps.caltech.edu, rye@gps.caltech.edu
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9:15 AM
ONE BILLION YEARS OF ARCHEAN CRUSTAL EVOLUTION: BLACK ROCK MOUNTAIN, NORTHEASTERN GRANITE MOUNTAINS, WYOMING
KRUCKENBERG, S. C., CHAMBERLAIN, K. R., FROST, C. D. and FROST, B. R., Department of Geology and Geophysics, Univ of Wyoming, Laramie, WY 82071-3006, scaley187@yahoo.com, scaley187@yahoo.com
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9:30 AM
TECTONIC JUXTAPOSITION OF CONTINENTAL AND OCEANIC SEDIMENTARY BASINS IN LATE ARCHEAN TIME, RATTLESNAKE HILLS, CENTRAL WYOMING
FRUCHEY, Benjamin L.1, FROST, Carol D.2 and CHAMBERLAIN, Kevin R.1, (1)Department of Geology and Geophysics, Univ of Wyoming, Laramie, WY 82071-3006, (2)Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071-3006, Benjamin_Fruchey@hotmail.com, Benjamin_Fruchey@hotmail.com
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9:45 AM
AN EXAMPLE OF PRECAMBRIAN CRUSTAL GROWTH BY LATERAL ACCRETION: THE SOUTH PASS SUPRACRUSTAL BELT, WYOMING
FROST, Carol D.1, CHAMBERLAIN, Kevin R.2 and FROST, B. Ronald2, (1)Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071-3006, (2)Department of Geology and Geophysics, Univ of Wyoming, Laramie, WY 82071-3006, frost@uwyo.edu, frost@uwyo.edu
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10:00 AM
AS ABOVE, SO BELOW: THE COMPLEMENTARY RECORD OF ARCHEAN LATE TECTONIC SEDIMENTATION, IMBRICATION AND EXTENSIONAL COLLAPSE IN JUXTAPOSED MID- AND UPPER-CRUST OF THE WESTERN SLAVE PROVINCE, CANADA
PEHRSSON, Sally J., Continental Geoscience Division, Geol Survey of Canada, 601 Booth St, Ottawa, ON K1A 0E8, Canada and HELMSTAEDT, Herwart, Queen's Univ, Dept Geological Sciences, Kingston, ON K7L 3N6, Canada, pehrsson@nrcan.gc.ca, pehrsson@nrcan.gc.ca
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10:15 AM
ON THE RELATIONS BETWEEN CRATONIC LITHOSPHERE THICKNESS, PLATE MOTIONS, AND BASAL DRAG
ARTEMIEVA, Irina, Dept of Geophysics, Univ of Uppsala, Uppsala, Sweden and MOONEY, Walter D., U.S. Geol Survey, 345 Middlefield Rd. MS 977, Menlo Park, CA 94025, iartem@geofys.uu.se, iartem@geofys.uu.se
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10:30 AM
THE INTENSITY, OCCURRENCE, AND DURATION OF SUPERPLUME EVENTS
ABBOTT, Dallas H., Lamont-Doherty Earth Observatory, PO Box 1000, Palisades, NY 10964-8000 and ISLEY, Ann, Geology Department, State Univ of New York at Oswego, Oswego, NY 13126, dallas@ldeo.columbia.edu, dallas@ldeo.columbia.edu
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10:45 AM
VERTICAL CRUSTAL TECTONICS IN THE ARCHEAN? ANALOG MODELING
PESCHLER, Anne Patricia, EArth sciences, Univ of ottawa, 140 Louis Pasteur street, ottawa, ON K1N 6N5, Canada, BENN, Keith, Earth sciences, Univ of ottawa, 140 Louis Pasteur street, ottawa, ON K1N 6N5, Canada and ROEST, Walter, Continental geoscience division, Geol survey of Canada, 615 Booth Street, Ottawa, K1A 0E8, Canada, apeschle@science.uottawa.ca, apeschle@science.uottawa.ca
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11:00 AM
GLOBAL VARIATIONS IN DENSITY, COMPOSITION, AND THERMAL REGIME OF CONTINENTAL ROOTS
MOONEY, Walter D., U.S. Geol Survey, 345 Middlefield Rd. MS 977, Menlo Park, CA 94025, KABAN, Mikhail K., GeoForschungsZentrum, Potsdam, Germany and ARTEMIEVA, Irina, Dept of Geophysics, Univ of Uppsala, Uppsala, Sweden, mooney@usgs.gov, mooney@usgs.gov
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11:15 AM
IS CRATONIZATION THE RESULT OF HORIZONTAL TERRANE ACCRETION OR PARTIAL CONVECTIVE OVERTURN? EVIDENCE FROM TONALITE AND TRONDHJEMITE PLUTONS IN THE NORTHERN SUPERIOR PROVINCE
BÉDARD, Jean H.1, MADORE, Louis2, BROUILLETTE, Pierre1 and BERCLAZ, Alain3, (1)Centre Geoscientifique de Quebec, Geol Survey of Canada, CGQ, CP7500, 880 Ste-Foy, Ste-Foy, QC G1V 4C7, Canada, (2)Géologie Québec, Ministère des Ressources naturelles du Québec, 400 boulevard Lamaque, Val d'Or, QC J9P 3L4, Canada, (3)Géologie Québec, Ministère des Ressources naturelles du Québec, 545 Crémazie Est, Montréal, QC H2M 2V1, Canada, jbedard@rncan.gc.ca, jbedard@rncan.gc.ca
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11:30 AM
MAJOR CRUSTAL GROWTH EPISODES: MANTLE PLUMES OR CONCENTRATION OF TERRANES BY PLATE TECTONICS?
PATCHETT, P. Jonathan and CHASE, Clement G., Department of Geosciences, Univ of Arizona, Tucson, AZ 85721, patchett@geo.arizona.edu, patchett@geo.arizona.edu
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11:45 AM
SEISMIC IMAGING OF A LOWER-CRUSTAL OCEANIC SLAB: EVIDENCE FOR NEOARCHEAN TECTONIC ACCRETION IN THE WESTERN SUPERIOR PROVINCE, CANADA
HELMSTAEDT, Herwart1, HARRAP, Robin M.1 and WHITE, Don2, (1)Geological Sciences & Geological Engineering, Queen's Univ, Kingston, ON K7L 3N6, Canada, (2)Geological Survey of Canada, Ottawa, ON K1A 0E8, Canada, helmstaedt@geol.queensu.ca, helmstaedt@geol.queensu.ca
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