Session No. 269
Tuesday, 29 October 2013: 1:00 PM-5:00 PM
Mile High Ballroom 4EF (Colorado Convention Center)

Precambrian Geology

 

Geoffrey J. Gilleaudeau and Ashley R. Manning-Berg, Chairs
Paper #
Start Time
1
1:00 PM
PRECAMBRIAN GREENSTONE SEQUENCES REPRESENT DIFFERENT OPHIOLITE TYPES
FURNES, Harald, Department of Earth Science, Univ of Bergen, Allegt. 41, Bergen, 5007, Norway, DILEK, Yildirim, Department of Geology & Environmental Earth Science, Miami University, Culler Hall, Spring Street, Oxford, Ohio, OH 45056 and DEWIT, Maarten, AEON, Earth Stewardship Science, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa, 6031, harald.furnes@geol.uib.no
2
1:15 PM
3.5 BILLION YEARS OF RESHAPING, DEPLETING AND RESTOCKING KAAPVAAL CRATON CRUST
DE WIT, Maarten J., Aeon, Nelson Mandela Metropolitan University, Port Elizabeth, 6031, South Africa, maarten.dewit@nmmu.ac.za
3
1:30 PM
3.5 GA DEEP-WATER FOSSIL HYDROTHERMAL FIELD AND SUBAERIAL DIAMICTITE ─ HOT ARCHEAN CRUST IN DEEP COOL OCEANS
DE WIT, Maarten J., Aeon, Nelson Mandela Metropolitan University, Port Elizabeth, 6031, South Africa and FURNES, Harald, Department of Earth Science & Centre for Geobiology, University of Bergen, Allegaten 41, Bergen, 5007, Norway, maarten.dewit@nmmu.ac.za
4
1:45 PM
SILICON ISOTOPE COMPOSITION OF ARCHEAN CHERTS FROM >3.7 GA TO 2.7 GA DETERMINED BY SECONDARY ION MASS SPECTROMETRY (SIMS)
BRENGMAN, Latisha Ashley, Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37922, FEDO, Christopher M., Department of Earth & Planetary Sciences, University of Tennessee, 1412 Circle Drive, Knoxville, TN 37996 and WHITEHOUSE, Martin J., Department of Geosciences, Swedish Museum of Natural History, Stockholm, SE-104 05, Sweden, lbrengma@utk.edu
5
2:00 PM
LOOKING FOR THE EARLY ARCHEAN ROCKS IN SOUTH AMERICA: U-PB DATING AND HF ISOTOPES IN ZIRCONS FROM THE NORTH SAO FRANCISCO CRATON, BRAZIL
DANTAS, Elton Luiz1, BRITO NEVES, Benjamim Bley2 and FUCK, Reinhardt1, (1)Instituto de Geociencias, Universidade de Brasilia, Brasilia, 70910900, Brazil, (2)USP, Universidade de São Paulo, São Paulo, 05508080, Brazil, elton@unb.br
6
2:15 PM
NEW DETRITAL ZIRCON AGE CONSTRAINTS ON THE PALEOPROTEROZOIC WOLHAARKOP-DRAKENSTEIN LATERITIC PALEOSOL, GAMAGARA KARST LATERITES AND THE LUCKNOW HEAVY CARBONATE CARBON ISOTOPE EXCURSION, GRIQUALAND WEST, SOUTH AFRICA
BEUKES, Nicolas J.1, DA SILVA, Richard2, DREYER, Daphne2, VAN NIEKERK, Herman2, VORSTER, Clarisa2 and FREI, Dirk3, (1)Department of Geology, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg, 2006, South Africa, (2)Department of Geology, University of Johannesburg, Auckland Park, 2006, South Africa, (3)Central Analytical Facility, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa, nbeukes@uj.ac.za
 
2:30 PM
Break
7
2:45 PM
OXYATMOVERSION AT MILLENIAL RESOLUTION ACCOMPANIES YOUNGEST SIDERIAN SNOWBALL EARTH DEGLACIATION
RAUB, Timothy D. and TANG, Terry Y.S., Department of Earth and Environmental Sciences, University of St. Andrews, Irvine Building, North Street, St. Andrews, KY16 9AL, United Kingdom, timraub@st-andrews.ac.uk
8
3:00 PM
FLUVIAL IRON FORMATION: A NEW PRECAMBRIAN BIOGEOCHEMICAL SEDIMENTARY SYSTEM, EARAHEEDY BASIN, WESTERN AUSTRALIA
PUFAHL, Peir K., Department of Earth and Environmental Science, Acadia University, 12 University Ave, Wolfville, NS B4P 2R6, Canada, HIATT, Eric E., Geology Department, Univ of Wisconsin-Oshkosh, 800 Algoma Blvd, Oshkosh, WI 54901 and PIRAJNO, Franco, Geological Survey of Western Australia, 100 Plain Street, East Perth, 6004, Australia, peir.pufahl@acadiau.ca
9
3:15 PM
HG CONCENTRATIONS AND MASS INDEPENDENT FRACTIONATION IN MID-PROTEROZOIC MARINE SHALES
THIBODEAU, Alyson M.1, BERGQUIST, Bridget A.2, KAH, Linda C.3, HAZEN, Robert M.4, ONO, Shuhei5 and GHOSH, Sanghamitra2, (1)Department of Earth Sciences, Dickinson College, Carlisle, PA 17013, (2)Department of Earth Sciences, University of Toronto, Toronto, ON M5S 3B1, Canada, (3)Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, (4)Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington DC, 20015, (5)Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, alyson.thibodeau@gmail.com
10
3:30 PM
TRACKING THE CHEMOCLINE IN ANCIENT OCEANS: AN EXAMPLE FROM THE MESOPROTEROZOIC OF MAURITANIA
GILLEAUDEAU, Geoffrey J., Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, Copenhagen, 1350, Denmark and KAH, Linda C., Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, ggillea1@gmail.com
11
3:45 PM
CALCITIZED EVAPORITES AND THE EVOLUTION OF EARTH’S EARLY BIOSPHERE
MANNING-BERG, Ashley R. and KAH, Linda C., Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, aberg@utk.edu
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