Session: Precambrian Geology (2002 Denver Annual Meeting (October 27-30, 2002))

Paper #

Start Time

1

1:30 PM

3.7 GA OVERGROWTHS ON A 4.33 GA ZIRCON FROM JACK HILLS: EVIDENCE OF EARLY CRUSTAL RECYCLING

CAVOSIE, Aaron J¹, VALLEY, John W.¹, DUNYI, Liu², WILDE, Simon A.³ and GRANT, Matthew³, (1)Geology and Geophysics, Univ of Wisconsin, Madison, 1215 W. Dayton, Madison, WI 53706, (2)Chinese Acad. Geol. Sci, Beijing, China, (3)Curtin Univ, Bentley, 6102, Australia, acavosie@geology.wisc.edu, acavosie@geology.wisc.edu

2

1:45 PM

A 3714 MA PLUTON INTRUDING THE ISUA GREENSTONE BELT, SOUTHWEST GREENLAND: THE WORLD'S OLDEST VOLCANO-SEDIMENTARY SECTION (OR, AT LEAST PART OF IT) GETS OLDER

GRIMES, Stephen W. and DUNNING, Greg R., Memorial Univ Newfoundland, Dept Earth Science, St Johns's, NF A1B 3X5, Canada, sgrimes@sparky2.esd.mun.ca, sgrimes@sparky2.esd.mun.ca

3

2:00 PM

SHRIMP II GEOCHRONOLOGY OF THE ADIRONDACK AMCG SUITE, I: EMPLACEMENT CHRONOLOGY OF ANORTHOSITES AND GABBROS

HAMILTON, Michael A.¹, MCLELLAND, James M.², BICKFORD, M.E.³, CLECHENKO, Cory C.⁴ and VALLEY, John W.⁴, (1)J.C. Roddick Ion Microprobe (SHRIMP II) Lab, Geological Survey of Canada, 601 Booth St, Ottawa, ON K1A 0E8, Canada, (2)Dept. Geology, Skidmore College, Saratoga Springs, NY 12032, (3)Dept. of Earth Sciences, Syracuse Univ, Syracuse, NY 13244, (4)Dept. of Geology and Geophysics, Univ of Wisconsin, Madison, WI 53706, hamilton@nrcan.gc.ca, hamilton@nrcan.gc.ca

4

2:15 PM

SHRIMP II GEOCHRONOLOGY OF THE ADIRONDACK AMCG SUITE, IV: TIMING AND DEPTH OF EMPLACEMENT OF ANORTHOSITE IN THE NORTHEASTERN ADIRONDACKS

CLECHENKO, Cory C.¹, VALLEY, John W.¹, HAMILTON, Michael A.², MCLELLAND, James M.³ and BICKFORD, M.E.⁴, (1)Dept. of Geology and Geophysics, Univ of Wisconsin-Madison, Madison, WI 53706, (2)J.C. Roddick Ion Microprobe (SHRIMP II) Lab, Geological Survey of Canada, 601 Booth St, Ottawa, ON K1A 0E8, Canada, (3)Dept. Geology, Skidmore College, Saratoga Springs, NY 12866, (4)Dept. of Earth Sciences, Syracuse Univ, Syracuse, NY 13244, coryc@geology.wisc.edu, coryc@geology.wisc.edu

5

2:30 PM

PRECAMBRIAN SUPERGENE ALTERATION OF NATIVE COPPER DEPOSITS IN THE KEWEENAW PENINSULA, MICHIGAN

BORNHORST, Theodore J., Geological and Mining Engineering and Sciences, Michigan Tech, Houghton, MI 49931-1295 and ROBINSON, George W., Seaman Mineral Museum, Michigan Tech, Houghton, MI 49931-1295, tjb@mtu.edu, tjb@mtu.edu

6

2:45 PM

GEOCHEMICAL AND PETROGRAPHICAL CHARACTERISTICS OF THE ARCHEAN DONGWANZI OPHIOLITE COMPLEX AND RELATED ROCKS

HUSON, R. and KUSKY, T., Department of Earth and Atmospheric Sciences, Saint Louis Univ, 329 Macelwane Hall, 3507 Laclede Ave, St. Louis, MO 63103, husonrl@eas.slu.edu, husonrl@eas.slu.edu

7

3:00 PM

MORPHOLOGY OF MOLAR-TOOTH STRUCTURE IN PRECAMBRIAN CARBONATES: PETROGRAPHIC TESTS OF A GAS EXPANSION GENESIS

POLLOCK, Mark D.¹, KAH, Linda C.¹ and BARTLEY, Julie K.², (1)Department of Geological Sciences, Univ of Tennessee, Knoxville, TN 37996, (2)Geosciences, State Univ of West Georgia, Carrollton, GA 30118, mpollock@utk.edu, mpollock@utk.edu

8

3:15 PM

A PRE-GLACIAL d¹³C ANOMALY IN SVALBARD: IMPLICATIONS FOR THE NUMBER, CAUSES AND CORRELATION OF NEOPROTEROZOIC GLACIATIONS

HALVERSON, Galen P., Dept. Earth and Planetary Sciences, Harvard Univ, 20 Oxford St, Cambridge, MA 02138-2902 and RICE, A. Hugh. N., Institute for Geology, Univ of Vienna, Geozentrum, Althanstrasse 14, Vianna, 1400, Austria, halvers@fas.harvard.edu, halvers@fas.harvard.edu

9

3:30 PM

WEATHERING, PROVENANCE, AND TECTONIC SETTING OF THE NEOPROTEROZOIC STIRLING QUARTZITE, DEATH VALLEY AREA, CALIFORNIA: A GEOCHEMICAL PERSPECTIVE

SCHOENBORN, William A. and FEDO, Christopher M., Earth & Environmental Sciences, The George Washington Univ, 2029 G St. NW, Washington, DC 20052, schoenborn.william@epa.gov, schoenborn.william@epa.gov