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

Session No. 173
Tuesday, 9 November 2004: 1:30 PM-5:30 PM

T80. Pre-EarthScope Synthesis of the Rocky Mountains V: New Insights in Basement Tectonics, Deep Crustal Structure and Precambrian Tectonic Evolution

GSA Structural Geology and Tectonics Division; GSA Geophysics Division; Rocky Mountain Association of Geologists; Colorado Scientific Society; EarthScope

 

Michael Williams and Karl E. Karlstrom, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1
1:35 PM
BASEMENT ACCRETIONARY PROCESSES - PRECURSOR TO THE TECTONIC REACTIVATION HISTORY OF THE ROCKIES AND ADJOINING REGIONS
CARLSON, Marvin P., Nebraska Geological Survey, Univ of Nebraska-Lincoln, 102 NH, Lincoln, NE 68588-0517, mcarlson1@unl.edu, mcarlson1@unl.edu
2
1:50 PM
TECTONIC HEREDITY IN THE GRAND CANYON AND IMPLICATIONS FOR TIBETAN-SCALE MESOPROTEROZOIC INTRA-CONTINENTAL DEFORMATION IN THE SOUTHWESTERN UNITED STATES
DUMOND, Gregory, Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-9297, WILLIAMS, Michael, Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003, MAHAN, Kevin, Department of Geosciences, Univ of Massachusetts, Amherst, MA 01003-9297, KARLSTROM, Karl E., Dept. of Earth & Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131 and HEIZLER, Matthew T., New Mexico Bureau of Mines and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, gdumond@geo.umass.edu, gdumond@geo.umass.edu
3
2:05 PM
METAMORPHIC HISTORY OF THE UPPER GRANITE GORGE, GRAND CANYON, ARIZONA, AND IMPLICATIONS FOR THE SIGNIFICANCE OF DOMAIN BOUNDARIES IN THE YAVAPAI/MAZATZAL OROGEN
MAHAN, Kevin H.1, DUMOND, Gregory1, WILLIAMS, Michael1, JERCINOVIC, Michael1 and KARLSTROM, Karl E.2, (1)Geosciences, Univ of Massachusetts, 611 N. Pleasant St, Amherst, MA 01003, (2)Dept. of Earth & Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, kmahan@geo.umass.edu, kmahan@geo.umass.edu
4
2:20 PM
ADDING “TIME” TO THE EARTHSCOPE IMAGE: PETROLOGIC ANALYSIS, STRUCTURAL ANALYSIS, AND MONAZITE GEOCHRONOLOGY OF THE PROTEROZOIC CRUST
WILLIAMS, Michael L., Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-5820, JERCINOVIC, Michael J., Department of Geosciences, Univ of Massachusetts, Morrill Science Center, 611 North Pleasant Street, Amherst, MA 01003-5820, KARLSTROM, Karl E., Dept. of Earth & Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, MAHAN, Kevin, Department of Geosciences, Univ of Massachusetts, Amherst, MA 01003-9297 and DUMOND, Gregory, Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-9297, mlw@geo.umass.edu, mlw@geo.umass.edu
5
2:35 PM
PROGRESSIVE PROTEROZOIC GROWTH OF SOUTHERN LAURENTIA BY MAGMATIC STABILIZATION OF LITHOSPHERE
WHITMEYER, Steven J., Earth and Planetary Sciences, Univ of New Mexico, Northrup Hall, Room 141, MSC 03 2040, Albuquerque, NM 87131-0001 and KARLSTROM, Karl, Earth and Planetary Sciences, Univ of New Mexico, 200 Yale Blvd NE, Northrop Hall, Albuquerque, NM 87131, stevenw@unm.edu, stevenw@unm.edu
6
2:50 PM
NEW INSIGHTS INTO THE PROTEROZOIC EVOLUTION OF THE WESTERN MARGIN OF LAURENTIA AND THEIR TECTONIC IMPLICATIONS
MUELLER, Paul, Department of Geology, Univ of Florida, Gainesville, FL 32611, FOSTER, David, Department of Geology, University of Florida, Gainesville, FL 32611, MOGK, David, Earth Sciences, Montana State Univ, Bozeman, MT 59717 and WOODEN, Joseph, USGS-SUMAC, Stanford Univ, Stanford, CA 94305-2220, mueller@geology.ufl.edu, mueller@geology.ufl.edu
7
3:05 PM
NEW U-PB DATES OF SYN-DEFORMATIONAL MINERALS THAT DIRECTLY DATE MULTIPLE TECTONIC EVENTS AT 1.75 AND 1.62 GA ALONG THE CHEYENNE BELT SUTURE ZONE, SOUTHEASTERN WYOMING
STRICKLAND, Diana, Geology and Geophysics, Univ of Wyoming, PO box 3006, Laramie, WY 82071-3006, CHAMBERLAIN, Kevin, Geology & Geophysics Department, Univ of Wyoming, Laramie, WY 82071-3006 and DUEBENDORFER, Ernest, Department of Geology, Northern Arizona Univ, Flagstaff, AZ 86011, stricklanddiana@msn.com, stricklanddiana@msn.com
8
3:20 PM
STRUCTURAL AND THERMOCHRONOLOGIC EVIDENCE FOR A CA. 1.6 GA CONTRACTIONAL EVENT IN SOUTHERN WYOMING
DUEBENDORFER, Ernest, Department of Geology, Northern Arizona Univ, Flagstaff, AZ 86011, CHAMBERLAIN, Kevin, Geology & Geophysics Department, Univ of Wyoming, Laramie, WY 82071-3006, HEIZLER, Matthew T., New Mexico Bureau of Geology & Mineral Resources, New Mexico Institute of Mining & Technology, Socorro, NM 87801 and HARPER, Kathleen, Department of Geology and Geophysics, Univ of Wyoming, P.O. Box 3006, Laramie, WY 82701, Ernie.D@nau.edu, Ernie.D@nau.edu
 
3:35 PM
Break
9
3:50 PM
BRITTLE AND PLASTIC DEFORMATION IN THE HOMESTAKE SHEAR ZONE, COLORADO: IMPLICATIONS FOR DEFORMATION PROCESSES IN THE MIDDLE CRUST AND THE EVOLUTION OF THE COLORADO MINERAL BELT
SHAW, Colin A., Geology, Univ of Wisconsin, Eau Claire, 105 Garfield Ave, Eau Claire, WI 54702-4004 and ALLEN, Joseph L., Division of Natural Sciences, Concord College, Campus Box 19, Concord College, Athens, WV 24712, shawca@uwec.edu, shawca@uwec.edu
10
4:05 PM
CIRCA 1.4 GA PENETRATIVE DEFORMATION IN THE SOUTHERN WET MOUNTAINS, COLORADO: IMPLICATIONS FOR MESOPROTEROZOIC INTRACONTINENTAL TECTONISM ACROSS THE SOUTHERN ROCKY MOUNTAINS
JONES III, James V.1, SIDDOWAY, Christine S.2, CONNELLY, James N.1, PERKINS, George2 and CALLAHAN, Owen3, (1)Department of Geological Sciences, Univ of Texas at Austin, Austin, TX 78712, (2)Geology Department, Colorado College, Colorado Springs, CO 80903, (3)School of Natural Science, Hampshire College, Amherst, MA 01002, jvjones@mail.utexas.edu, jvjones@mail.utexas.edu
11
4:20 PM
AUREOLE STRUCTURE OF 1.4 GA PLUTONS AND THEIR TECTONIC SIGNIFICANCE
DEAN, Robert, Montgomery College, 51 Mannakee Street, Rockville, MD 20850 and ANDRONICOS, Christopher L., Department of Geological Sciences, Univ of Texas at El Paso, 500 W University Ave, El Paso, TX 79968, rdean@utep.edu, rdean@utep.edu
12
4:35 PM
THE EVOLUTION OF LAURENTIA AS DOCUMENTED BY 40AR/39AR THERMOCHRONOLOGY STUDIES
HEIZLER, Matthew T.1, KARLSTROM, Karl E.2, SHAW, Colin A.3, TIMMONS, J. Michael1 and SANDERS, Robert E.4, (1)New Mexico Bureau of Geology, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, (2)Dept. Earth and Planetary Sciences, Univ of New Mexico, Albuquerque, NM 87131, (3)Department of Geology, Univ. Wisconsin, Eau Claire, 105 Garfield Ave, Eau Claire, WI 54702, (4)Dept. of Earth and Environmental Sci, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, kek1@unm.edu, kek1@unm.edu
13
4:50 PM
PROVENANCE AND GEOCHRONOLOGY OF MESOPROTEROZOIC SEDIMENTARY ROCKS FROM ACROSS THE SOUTHWEST UNITED STATES REVEALED BY 40AR/39AR DATING OF DETRITAL MUSCOVITES
FLETCHER, K.E.1, HEIZLER, M.T.2, KARLSTROM, Karl E.3, TIMMONS, J.M.2, CROSSEY, L.J.3 and BLOCH, J.D.3, (1)Earth and Environmental Sciences, New Mexico Institute of Mining and Technology, Socorro, NM 87801, (2)NM Bureau of Mines, Socorro, NM 87801, (3)Department of Earth and Planetary Science, Univ of New Mexico, Northrup Hall, Albuquerque, NM 87131, kathrynf@nmt.edu, kathrynf@nmt.edu
14
5:05 PM
BASEMENT EXHUMATION, FAULT REACTIVATION, AND K-METASOMATISM IN THE SOUTHERN SANGRE DE CRISTO RANGE, NEW MEXICO: 40AR/39AR INSIGHTS INTO NEOPROTEROZOIC TECTONISM AND CRUSTAL FLUID FLOW
SANDERS, Robert E.1, MELIS, Erwin A.1, HEIZLER, Matthew T.1, GOODWIN, Laurel B.1 and CHAMBERLAIN, Kevin R.2, (1)Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801, (2)Department of Geology and Geophysics, Univ of Wyoming, Dept 3006, 1000 University Ave, Laramie, WY 82071, sanders@nmt.edu, sanders@nmt.edu
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