2009 Portland GSA Annual Meeting (18-21 October 2009)
Session No. 12 Sunday, 18 October 2009
8:00 AM-12:00 PM, Oregon Convention Center: A107/108/109

T43. Detachment Dynamics: Heat, Deformation, and Fluids in Extensional Systems (GSA Structural Geology and Tectonics Division)

Christian Teyssier and Donna L. Whitney, Presiding
 Paper #Start Time
12-18:00 AM THROUGH A GLASS, DARKLY: SYMMETRY AND ASYMMETRY IN THE MAGMA POOR RIFTED MARGINS OF SOUTHERN AUSTRALIA AND EAST ANTARCTICA: DIREEN, Nicholas G.1, STAGG, Howard M.J.2, SYMONDS, Philip A.2, and COLWELL, James B.2, (1) School of Earth Sciences, University of Tasmania, Private Bag 79, Hobart, TAS 7001, Australia, ndireen@frogtech.com.au, (2) Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia
12-28:20 AM HOT AND COLD DETACHMENT ZONES: LINKING LISTRIC NORMAL FAULTING IN THE SOUTHERN CANADIAN ROCKIES FORELAND THRUST-FOLD BELT TO BACK-ARC DEXTRAL TRANSTENSION AND DUCTILE CRUSTAL BOUDINAGE: PRICE, Raymond A., Dept. of Geological Sciences and Geological Engineering, Queen's Univ, Kingston, ON K7L 3N6, price@geol.queensu.ca
12-38:35 AM CORDILLERAN DETACHMENTS AS DYNAMIC INTERFACES BETWEEN METEORIC AND DEEP FLUID SYSTEMS: TEYSSIER, Christian1, WHITNEY, Donna L.1, and MULCH, Andreas2, (1) Geology & Geophysics, University of Minnesota, Minneapolis, MN 55455, teyssier@umn.edu, (2) Institute of Geology, Universität Hannover, Callinstr. 30, Hannover, 30167, Germany
12-48:50 AM CONTRASTING MIDDLE AND UPPER CRUSTAL DETACHMENT FAULT HYDROTHERMAL SYSTEMS: VALHALLA COMPLEX, BRITISH COLUMBIA AND THE SOUTHERN WHITE PINE RANGE, NEVADA: HOLK, Gregory J.1, TAYLOR, Hugh P. Jr2, TONEVA, Denitsa1, and FRANCIS, Robert D.1, (1) Department of Geological Sciences, California State Univ Long Beach, 1250 Bellflower Blvd, Long Beach, CA 90840, gholk@csulb.edu, (2) Division of Geological and Planetary Sciences, California Institute of Technology, 1250 California Blvd, Pasadena, CA 91125
12-59:05 AM STUDY OF A FOSSIL HYDROTHERMAL SYSTEM IN THE NORTHERN SNAKE RANGE USING STABLE ISOTOPE, MICROSTRUCTURAL AND 40Ar/39Ar DATA AND ITS USE AS A PALEOALTIMETER: GEBELIN, Aude, Institut für Geologie, Leibniz Universität Hannover, Callinstr. 30, Hannover, 30167, Germany, gebelin@geowi.uni-hannover.de, MULCH, Andreas, Institute of Geology, Universität Hannover, Callinstr. 30, Hannover, 30167, Germany, TEYSSIER, Christian, Geology and Geophysics, Univ of Minnesota, Minneapolis, MN 55455, and HEIZLER, Matt, New Mexico Bureau of Geology & Mineral Resources, New Mexico Institute of Mining & Technology, Socorro, NM 87801
12-69:25 AM UNUSUAL ‘GRADED' FAULT ROCKS FROM THE SNAKE RANGE DETACHMENT, NV – IMPLICATIONS FOR FLUID INVOLVEMENT IN LOW-ANGLE NORMAL FAULT PROCESSES AND THE ANGLE OF SLIP OF CORE COMPLEX DETACHMENTS: HAINES, Samuel H., Geosciences, Pennsylvania State University, 510 Deike Building, University Park, PA 16802, shh13@psu.edu and VAN DER PLUIJM, Ben, Geological Sciences, University of Michigan, 2534 C. C. Little Building, 1100 North University Ave, Ann Arbor, MI 48109
12-79:40 AM PERVASIVE MID-CRUSTAL EXTENSIONAL STRAIN FOLLOWED BY RAPID LOCALIZATION: AN EXAMPLE FROM THE PIONEER CORE COMPLEX, IDAHO: VOGL, James J.1, RODGERS, David W.2, and KENT, Allen1, (1) Department of Geological Sciences, University of Florida, Gainesville, FL 32611, jvogl@geology.ufl.edu, (2) Department of Geosciences, Idaho State University, 921 South 8th Ave., Box 8072, Pocatello, ID 83209
12-89:55 AM ‘MINIDETACHMENT' LOCALIZATION CONTROLLED BY FLUID INFILTRATION IN THE FOOTWALL OF THE WHIPPLE MOUNTAINS CORE COMPLEX: WEAK MATERIALS OR HIGH PORE PRESSURE?: SELVERSTONE, Jane1, WOODRUFF, William H.1, and AXEN, Gary2, (1) Earth & Planetary Sciences, University of New Mexico, MSC03 2040, Albuquerque, NM 87131, selver@unm.edu, (2) Department of Earth & Environmental Science, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801
 10:10 AM Break
12-910:25 AM EVIDENCE FOR STRESS ROTATION NEAR THE WEST SALTON DETACHMENT FAULT (WSDF), SALTON TROUGH, CALIFORNIA: AXEN, Gary1, LUTHER, Amy2, SELVERSTONE, Jane3, and KHALSA, Niranjan1, (1) Department of Earth & Environmental Science, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, gaxen@ees.nmt.edu, (2) Department of Earth & Environmental Science, New Mexico Tech, 801 Leroy Pl, Socorro, NM 87801, (3) Earth & Planetary Sciences, University of New Mexico, MSC03-2040, Albuquerque, NM 87131-0001
12-1010:45 AM SYSTEMATICALLY FRACTURED CLASTS IN THE TITUS CANYON FORMATION: EVIDENCE FOR LATE-STAGE BRITTLE DEFORMATION IN THE BOUNDARY CANYON DETACHMENT SYSTEM: LINDEMANN, Christie D. and RIGGS, Eric M., Dept. of Earth and Atmospheric Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907-2051, emriggs@purdue.edu
12-1111:00 AM A COUPLED HYDROGEOLOGIC DISSOLUTION AND REPRECIPITATION MODEL OF CARBONATE ROCKS ABOVE THE BUCKSKIN/RAWHIDE DETACHMENT FAULT, SWANSEA AREA, ARIZONA: ANDERSON, R. Ernest, U.S. Geological Survey, Kernville, CA 93238, anderson_ernie@yahoo.com
12-1211:15 AM STRAIN PARTITIONING IN SYNTHETIC ACCOMMODATION ZONES AND SELECTED GEOTHERMAL SYSTEMS IN COLORADO: MORGAN, Paul and SARES, Matthew, Colorado Geological Survey, 1313 Sherman Street, Room 715, Denver, CO 80203, Paul.Morgan@nau.edu
12-1311:30 AM U-PB & O-ISOTOPE INVESTIGATION OF AN EOCENE MYLONITIC ORTHOGNEISS ON SERIFOS: A RECORD OF MELTING OR HP METAMORPHISM IN THE WESTERN CYCLADES?: SENKOWSKI, C.A.1, SCHNEIDER, D.A.1, IGLSEDER, C.2, GRASEMANN, B.2, and SCHMITT, A.3, (1) Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada, csenk027@uottawa.ca, (2) Department of Geodynamics & Sedimentology, University of Vienna, Vienna, 1090, Austria, (3) Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095-1567
12-1411:45 AM THE AMA DRIME DETACHMENT, TIBET-NEPAL: INSIGHTS INTO OROGEN-PARALLEL EXTENSION AND EXHUMATION OF THE AMA DRIME MASSIF: LANGILLE, Jackie1, JESSUP, Micah1, COTTLE, John2, and NEWELL, Dennis3, (1) Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, jlangill@utk.edu, (2) Earth Sciences, University of California, Santa Barbara, CA 93106, (3) Earth and Environmental Science Division, Los Alamos National Laboratory, Los Alamos, NM 87545

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