Session No. 165 Thursday, November 8, 2001

8:00 AM-12:00 PM, Hynes Convention Center: 112
T6. Evolution of the Precambrian Earth
Walter D. Mooney, Herwart Helmstaedt, Desmond E. Moser and Irina Artemieva, Presiding
 Paper #Start Time
165-08:00 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, irichard@mail.smu.edu, (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
165-08:15 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, becker@jkbecker.de, (2) Ontario Geological Survey, Ministry of Northern Development and Mines, 933 Ramsay Lake Rd, Sudbury, ON P3E6B5, Canada
165-08:30 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, dholm@kent.edu, (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
165-08:45 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, abekker@vt.edu, 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
165-09:00 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.
165-09:15 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
165-09:30 AM TECTONIC JUXTAPOSITION OF CONTINENTAL AND OCEANIC SEDIMENTARY BASINS IN LATE ARCHEAN TIME, RATTLESNAKE HILLS, CENTRAL WYOMING: FRUCHEY, Benjamin L., FROST, Carol D., and CHAMBERLAIN, Kevin R., Department of Geology and Geophysics, Univ of Wyoming, Laramie, WY 82071-3006, Benjamin_Fruchey@hotmail.com
165-09:45 AM AN EXAMPLE OF PRECAMBRIAN CRUSTAL GROWTH BY LATERAL ACCRETION: THE SOUTH PASS SUPRACRUSTAL BELT, WYOMING: FROST, Carol D., CHAMBERLAIN, Kevin R., and FROST, B. Ronald, Department of Geology and Geophysics, Univ of Wyoming, Laramie, WY 82071-3006, frost@uwyo.edu
165-010:00 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, pehrsson@nrcan.gc.ca and HELMSTAEDT, Herwart, Queen's Univ, Dept Geological Sciences, Kingston, ON K7L 3N6, Canada
165-010:15 AM ON THE RELATIONS BETWEEN CRATONIC LITHOSPHERE THICKNESS, PLATE MOTIONS, AND BASAL DRAG: ARTEMIEVA, Irina, Dept of Geophysics, Univ of Uppsala, Uppsala, Sweden, iartem@geofys.uu.se and MOONEY, Walter D., U.S. Geol Survey, 345 Middlefield Rd. MS 977, Menlo Park, CA 94025
165-010:30 AM THE INTENSITY, OCCURRENCE, AND DURATION OF SUPERPLUME EVENTS: ABBOTT, Dallas H., Lamont-Doherty Earth Observatory, PO Box 1000, Palisades, NY 10964-8000, dallas@ldeo.columbia.edu and ISLEY, Ann, Geology Department, State Univ of New York at Oswego, Oswego, NY 13126
165-010:45 AM VERTICAL CRUSTAL TECTONICS IN THE ARCHEAN? ANALOG MODELING: PESCHLER, Anne Patricia1, BENN, Keith1, and ROEST, Walter2, (1) EArth sciences, Univ of ottawa, 140 Louis Pasteur street, ottawa, ON K1N 6N5, Canada, apeschle@science.uottawa.ca, (2) Continental geoscience division, Geol survey of Canada, 615 Booth Street, Ottawa, K1A 0E8, Canada
165-011:00 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, mooney@usgs.gov, KABAN, Mikhail K., GeoForschungsZentrum, Potsdam, Germany, and ARTEMIEVA, Irina, Dept of Geophysics, Univ of Uppsala, Uppsala, Sweden
165-011:15 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, jbedard@rncan.gc.ca, (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
165-011:30 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
165-011:45 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, helmstaedt@geol.queensu.ca, (2) Geological Survey of Canada, Ottawa, ON K1A 0E8, Canada

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