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

Session No. 104
Monday, 8 November 2004: 1:30 PM-5:30 PM

Structural Geology II: From Fractures to Shear Zones to Mantle Fabrics

 

Tim Wawrzyniec and Caroline E. Webber, Chairs
Paper #
Start Time
1
1:30 PM
THE CONSTANCY OF STRESS FIELDS DURING FRACTURING INDICATED BY JOINT SET NORMAL VECTOR DISTRIBUTIONS
WHITAKER, Amy E., Geosciences, The Pennsylvania State Univ, University Park, PA 16802 and ENGELDER, Terry, Department of Geosciences, Penn State University, 334 Deike Building, University Park, PA 16802, amy@geosc.psu.edu, amy@geosc.psu.edu
2
1:45 PM
THE ROLE OF RHEOLOGY IN THE EMPLACEMENT AND DEFORMATION OF SYNTECTONIC VEINS
CZECK, Dyanna M.1, DRUGUET, Elena2 and CARRERAS, Jordi2, (1)Geosciences, Univ of Wisconsin - Milwaukee, P.O. Box 413, Milwaukee, WI 53201, (2)Departament de Geologia, Universitat Autònoma de Barcelona, 08193, Bellaterra (Barcelona), Spain, dyanna@uwm.edu, dyanna@uwm.edu
3
2:00 PM
STRIKE-SLIP DUPLEXING AND ASSOCIATED FAULT “ROUGHENING”: AN EXAMPLE FROM THE AKSAI RESTRAINING STEPOVER ALONG THE ALTYN TAGH FAULT, NW CHINA
COWGILL, Eric1, GOLD, Ryan2, WANG, Xiao-feng3 and CHEN, Xuanhua3, (1)Department of Geology, University of California, One Shields Avenue, Davis, CA 95616, (2)Dept. of Geology, Univ of California Davis, One Shields Ave, Davis, CA 95616, (3)Institute of Geomechanics, Chinese Academy of Geol Sciences, Beijing, 10081, China, escowgill@ucdavis.edu, escowgill@ucdavis.edu
4
2:15 PM
USING A MATHEMATICAL MODEL TO HELP EXPLAIN OBSERVED STRAIN PATTERNS WITHIN THE MOINE THRUST ZONE, NW SCOTLAND
STRINE, Matthew, Earth and Environmental Science, Univ of Rochester, Hutchinson Hall/Dept EES/Rm 227, Rochester, NY 14627 and MITRA, Gautam, Department of Earth and Environmental Sciences, Univ of Rochester, Rochester, NY 14627, matty@earth.rochester.edu, matty@earth.rochester.edu
5
2:30 PM
OROCLINAL BENDING IN THE PENNSYLVANIA SALIENT: EVIDENCE FOR EARLY ROTATION FROM CALCITE TWINNING ANALYSIS
VAN DER PLUIJM, Ben A., Department of Geological Sciences, Univ of Michigan, 425 E University Ave, 2534 C.C. Little Building, Ann Arbor, MI 48109-1063 and ONG, Philip, Geological Sciences, Univ of Michigan, 2534 C.C. Little Building, Ann Arbor, MI 48109, vdpluijm@umich.edu, vdpluijm@umich.edu
6
2:45 PM
THREE-DIMENSIONAL MODELING OF THE DEEPWATER NIGER DELTA USING CRITICAL TAPER WEDGE MECHANICS
GUZOFSKI, Chris A.1, SHAW, John H.1 and BILOTTI, Frank2, (1)Dept. of Earth and Planetary Sciences, Harvard Univ, 20 Oxford St, Cambridge, MA 02138, (2)Unocal, 14141 SW Freeway, Sugar Land, TX 77478, guzofski@fas.harvard.edu, guzofski@fas.harvard.edu
7
3:00 PM
3D POST-ACCRETIONARY TECTONIC STRAIN IN THE ARABIAN-NUBIAN SHIELD: EXAMPLE FROM THE SUPERIMPOSITION OF THE OKO SHEAR ZONE ON THE NAKASIB SUTURE, RED SEA HILLS, SUDAN
MASON-BARTON, Katherine M., Department of Geosciences, The Univ of Texas at Dallas, 2601 N. Floyd Rd, P.O. Box 830688, Richardson, TX 75083-0688 and ABDELSALAM, Mohamed G., Geoscience, Univ of Texas at Dallas, 2601 North Floyd Rd, PO Box 830688, Richardson, TX 75083-0688, kmb026000@utdallas.edu, kmb026000@utdallas.edu
8
3:15 PM
4-DIMENSIONAL MODEL OF DIACHRONOUS CHEVRON FOLDING IN AN ACCRETIONARY PRISM SETTING
PINAN, Arancha, Department of Earth Sciences, Boston Univ, 685 Commonwealth Ave, Boston, MA 01125, DE PAOR, Declan, Department of Earth Sciences, Boston Univ, 685 Commonwealth Av, Boston, MA 02215 and SIMPSON, Carol, Department of Earth Sciences, Boston Univ, 685 Commonwealth Ave, Boston, MA 02215-1406, aranchap@bu.edu, aranchap@bu.edu
 
3:30 PM
Break
9
3:45 PM
ANALYSIS OF SHORTENING IN AN ACTIVE DETACHMENT FOLD, NANKAI TROUGH—AN INTRODUCTION TO "THICKNESS-RELIEF ANALYSIS"
GONZÁLEZ-MIERES, Ramón A., Department of Geosciences, Princeton Univ, Guyot Hall, Princeton, NJ 08544 and SUPPE, John, Department of Geosciences, Princeton Univ, Princeton, NJ 08544, ragonzal@princeton.edu, ragonzal@princeton.edu
10
4:00 PM
KINEMATIC VORTICITY ANALYSIS RECONSIDERED
BAILEY, Christopher M., FORTE, Adam M. and POLVI, Lina, Dept. of Geology, College of William & Mary, Williamsburg, VA 23187, cmbail@wm.edu, cmbail@wm.edu
11
4:15 PM
A DOWN-PLUNGE SECTION OF A PALEOGENE STRIKE-SLIP SHEAR ZONE FROM LOW-GRADE PHYLLITE TO HIGH-GRADE GNEISS IN THE CHUGACH METAMORPHIC COMPLEX, SOUTHERN ALASKA
DAY, Erik1, PAVLIS, Terry2 and O'DRISCOLL, Leland2, (1)Dept. Geology and Geophysics, Univ of New Orleans, New Orleans, LA 70148, (2)Dept. of Geology and Geophysics, Univ of New Orleans, New Orleans, LA 70148, erikday75@hotmail.com, erikday75@hotmail.com
12
4:30 PM
STRAIN IN MESO-SCALE DUCTILE SHEAR ZONES: EXAMPLES FROM THE NORTHWEST ADIRONDACKS, NEW YORK
BAIRD, Graham B., Department of Geology and Geophysics, Univ of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455, bair0042@umn.edu, bair0042@umn.edu
13
4:45 PM
POLYPHASE DEFORMATION AND SHEAR ZONE REACTIVATION, CURNAMONA PROVINCE, AUSTRALIA
NOBLE, Matthew P., BETTS, Peter G. and GANNE, Jerome, School of Geosciences, Australian Crustal Research Centre, Monash Univ, PO BOX 28E, Wellington Road, Clayton, 3800, mnoble@earth.monash.edu.au, mnoble@earth.monash.edu.au
14
5:00 PM
MULTIPLE GENERATIONS OF CROSS-CUTTING FABRICS IN NATURALLY-DEFORMED UPPER MANTLE ROCK, RED HILLS, NEW ZEALAND
WEBBER, Caroline E.1, TIKOFF, Basil1 and LITTLE, Timothy2, (1)Geology & Geophysics, Univ of Wisconsin-Madison, 1215 W. Dayton Street, Madison, WI 53706, (2)School of Earth Sciences, Victoria Univ, P.O. Box 600, Wellington, 6000, New Zealand, cwebber@geology.wisc.edu, cwebber@geology.wisc.edu
15
5:15 PM
MESOSCOPIC STRUCTURAL OBSERVATIONS OF LARGE SILL EMPLACEMENT MECHANISMS: THE FERRAR LARGE IGNEOUS PROVINCE, SOUTH VICTORIA LAND, ANTARCTICA
WHITTINGTON, Alan G., Geological Sciences, Univ of Missouri-Columbia, Columbia, MO 65211, MARSHAK, Stephen, Dept of Geology, Univ of Illinois, 1301 W Green St, Urbana, IL 61801 and FLEMING, Thomas H., Department of Earth Sciences, Southern Connecticut State University, New Haven, CT 06515, whittingtona@missouri.edu, whittingtona@missouri.edu