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

Session No. 237
Wednesday, 10 November 2004: 1:30 PM-5:30 PM

T90. Low-angle Normal Faults and Faulting: Field Studies, Fault Rocks, Mechanics, and Weakening Mechanisms

GSA Structural Geology and Tectonics Division; GSA Geophysics Division

 

Robert E. Holdsworth, Darrel S. Cowan and Cristiano Collettini, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1
1:40 PM
THE NATURE AND ORIGIN OF DETACHMENT FAULTS
LISTER, Gordon, Research School of Earth Sciences, The Australian National Univ, Canberra, 0200, Australia and FORSTER, M.A., Research School of Earth Sciences, The Australian National Univ, Canberra, 0200, gordon@virtualexplorer.com.au, gordon@virtualexplorer.com.au
2
1:55 PM
MICROSEISMICITY ALONG LOW-ANGLE NORMAL FAULTS TRIGGERED BY FLUID OVERPRESSURE: AN EXAMPLE FROM THE ALTOTIBERINA FAULT (CENTRAL ITALY)
COLLETTINI, Cristiano1, BARCHI, Massimiliano R.2, CARDELLINI, Carlo1, CHIODINI, Giovanni3, FRONDINI, Francesco1 and GIORGIO, Minelli1, (1)Dipartimento di Scienze della Terra, Università degli Studi di Perugia, Piazza dell'Università 1, Perugia, 06100, Italy, (2)Dipartimento di Scienze della Terra, Università degli Studi di Perugia, Piazza dell'Università 1, Perugia, 06100, (3)Osservatorio Vesuviano, Istituto Nazionale di Geofisica e Vulcanologia, Via Diocleziano 328, Napoli, 80124, Italy, colle@unipg.it, colle@unipg.it
3
2:10 PM
LATE QUATERNARY – RECENT SLIP ON A LOW-ANGLE NORMAL FAULT: INFERENCES FROM ALLUVIAL DEPOSITS ALONG THE PANAMINT VALLEY FAULT SYSTEM
KIRBY, Eric, Department of Geosciences, Pennsylvania State Univ, 218 Deike Building, University Park, PA 16802, WALKER, J. Douglas, Department of Geology, Univ of Kansas, Lawrence, KS 66045, GOSSE, John, Earth Sciences, Dalhousie University, Halifax, NS B3J 3J5, Canada and MCDONALD, Eric, Earth and Ecosystem Sciences, Desert Rsch Institute, 2215 Raggio Parkway, Reno, NV 89512, ekirby@geosc.psu.edu, ekirby@geosc.psu.edu
4
2:25 PM
ROLE OF LATE QUATERNARY DETACHMENT FAULTING IN THE NORTHERN GULF EXTENSIONAL PROVINCE, SIERRAS EL MAYOR AND CUCAPA, BAJA CALIFORNIA, MEXICO
SPELZ MADERO, Ronald and FLETCHER, John M., Departamento de Geología, CICESE, Ensenada, 22860, Mexico, rspelz@cicese.mx, rspelz@cicese.mx
5
2:40 PM
LOW-ANGLE NORMAL FAULT (LANF) MECHANICS: PRESENTLY INADEQUATE, VERY IMPORTANT, AND POISED FOR A MAJOR BREAKTHROUGH
AXEN, Gary, Earth and Space Sciences, Univ of California Los Angeles, 594 Charles E Young Drive East, Los Angeles, CA 90095, gaxen@ess.ucla.edu, gaxen@ess.ucla.edu
6
3:00 PM
FAULT GOUGE MINERALOGY AS A DRIVER FOR VARIABLE FRICTIONAL RESPONSE IN A LOW-ANGLE NORMAL FAULT SETTING
NUMELIN, T., MARONE, C. and KIRBY, E., Department of Geoscience, Penn State Univ, University Park, PA 16802, tnumelin@geosc.psu.edu, tnumelin@geosc.psu.edu
7
3:15 PM
WEAKENING MECHANISMS ALONG LOW-ANGLE NORMAL FAULTS
HOLDSWORTH, Robert E., Dept of Earth Sciences, Durham University, South Road, Durham, DH1 3LE, United Kingdom and COLLETTINI, Cristiano, Dip. Scienze della Terra, Universita' di Perugia, Piazza dell'Universita' 1, Perugia, 06100, R.E.Holdsworth@durham.ac.uk, R.E.Holdsworth@durham.ac.uk
8
3:30 PM
FAULT ZONE DEFORMATION: THE KEY TO WHAT IS A ROOTED DETACHMENT AND WHAT IS NOT
ANDERS, Mark H., WALKER, Christopher D. and CHRISTIE-BLICK, Nicholas, Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10968, manders@ldeo.columbia.edu, manders@ldeo.columbia.edu
9
3:50 PM
USING FIELD EVIDENCE TO DISTINGUISH BETWEEN ROOTED AND ROOTLESS DETACHMENT FAULTS IN THE MORMON MOUNTAINS, SOUTHEASTERN NEVADA
WALKER, Christopher D., Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory of Columbia University, 61, Route 9W, Palisades, NY 10964, ANDERS, Mark H., Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, NAGEL, Thorsten, Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory of Columbia Univ, 61, Route 9W, Palisades, NY 10964 and CHRISTIE-BLICK, Nicholas, Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10968, chrisw@ldeo.columbia.edu, chrisw@ldeo.columbia.edu
10
4:05 PM
"FOLDED DETACHMENTS AND CONSTRICTIONAL FABRICS IN TRANSTENSION; SPOOF OROGENIES"
DEWEY, John F., Geology, UC Davis, One Shields Avenue, Davis, CA 95616, dewey@geology.ucdavis.edu, dewey@geology.ucdavis.edu
11
4:25 PM
STRUCTURAL EXPRESSION OF LOW-ANGLE NORMAL FAULTS DEVELOPED IN WRENCH SETTINGS: AN EXAMPLE FROM THE WEST SALTON DETACHMENT SYSTEM
AXEN, Gary1, KAIROUZ, Mary1, STEELY, Alexander N.2, JANECKE, Susanne U.3 and DORSEY, Rebecca J.4, (1)Earth and Space Sciences, Univ of California Los Angeles, 594 Charles E Young Drive East, Los Angeles, CA 90095, (2)Geology, Utah State Univ, 4505 Old Main Hill, Logan, UT 84321, (3)Geology Department, Utah State Univ, Logan, UT 84322, (4)Geological Sciences, Univ of Oregon, Eugene, OR 97403-1272, maryliz216@aol.com, maryliz216@aol.com
12
4:40 PM
EXHUMATION BY LOW-ANGLE NORMAL FAULTING: EXAMPLES FROM THE AEGEAN SEA, GREECE
RING, Uwe, Institut fuer Geowissenschaften, Johannes Gutenberg-Universität, Mainz, 55099, GESSNER, Klaus, Computational Geoscience Group, CSIRO Exploration and Mining, PO Box 1130, Bentley, 6102, Australia, BRICHAU, Stephanie, Insitut fuer Geowissenschaften, Universitaet Mainz, Mainz, 55099, Germany, GLODNY, Johannes, GeoForschungsZentrum, Potsdam, 14473 and WILL, Thomas, Institut fuer Mineralogie, Universitaet Wuerzburg, Wuerzburg, 97074, ring@uni-mainz.de, ring@uni-mainz.de
13
5:00 PM
FLUID FLOW AND HEAT TRANSFER DURING EXHUMATION OF METAMORPHIC CORE COMPLEXES
FAYON, Annia1, MULCH, Andreas1, TEYSSIER, Christian1, PERSON, Mark2 and VANDERHAEGHE, Olivier3, (1)Geology & Geophysics, Univ of Minnesota, Minneapolis, MN 55455, (2)Department of Geological Sciences, Indiana Univ, (3)UMR 7566 G2R, Université Henri Poincaré Nancy 1, BP 239, Vandoeuvre-lès-Nancy Cedex, 54506, France, fayon001@tc.umn.edu, fayon001@tc.umn.edu
14
5:15 PM
TIME SCALES OF FLUID FLOW AND THERMAL RELAXATION DURING HIGH-STRESS DEFORMATION IN EXTENSIONAL DETACHMENT MYLONITE
COSCA, Mike, Institute of Mineralogy and Geochemistry, Univ of Lausanne, BFSH-2, Lausanne, 1015, MULCH, Andreas, Geology and Geophysics, Univ of Minnesota, Minneapolis, MN 55455 and TEYSSIER, Christian, Geology & Geophysics, Univ of Minnesota, Minneapolis, MN 55455, michael.cosca@img.unil.ch, michael.cosca@img.unil.ch
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