Session: Driving Mechanisms and Structural Styles of Synconvergent Extension (Cordilleran Section (104th Annual) and Rocky Mountain Section (60th Annual) Joint Meeting (19

Paper #

Start Time

1:30 PM

Introductory Remarks

1

1:35 PM

SYNCONVERGENT EXTENSION IS DRIVEN BY SUBDUCTION

HAMILTON, Warren B., Department of Geophysics, Colorado School of Mines, Golden, CO 80401, whamilto@mines.edu, whamilto@mines.edu

2

1:55 PM

Withdrawn

3

2:15 PM

PROTRACTED BROADLY OROGEN-PARALLEL STRETCHING IN AN ARC DURING SUBDUCTION, NORTH CASCADES, WASHINGTON

MILLER, Robert B.¹, PATERSON, Scott R.², GORDON, Stacia³, MICHELS, Z.D.⁴, SHEA, E.K.⁵ and WINTZER, Niki E.¹, (1)Dept Geology, San Jose State University, 1 Washington Sq, San Jose, CA 95192-0102, (2)Department of Earth Sciences, 3651 Trousdale Parkway, Los Angeles, CA 90089, (3)Department of Geology & Geophysics, Univ of Minnesota, Minneapolis, MN 55455, (4)Geology, University of Wisconsin - Madison, 1215 W. Dayton St, Madison, WI 53706, (5)Geology, San Jose State University, One Washington Square, San Jose, CA 95192-0102, rmiller@geosun.sjsu.edu, rmiller@geosun.sjsu.edu

4

2:35 PM

OROGEN-PARALLEL FLOW IN THE SOUTHERN SKAGIT GNEISS COMPLEX, NORTH CASCADES, WASHINGTON

SHEA, E.K. and MILLER, R.B., Department of Geology, San Jose State University, One Washington Square, San Jose, CA 95192-0102, ekshea@alum.mit.edu, ekshea@alum.mit.edu

5

2:55 PM

SYNCONVERGENT EXTENSION IN THE PERUVIAN ANDES ABOVE A MODERN-DAY FLAT SLAB

MCNULTY, Brendan, Earth Science Dept, California State University Dominguez Hills, 1000 E. Victoria Street, Carson, CA 90747, FARBER, Daniel, Earth and Planetary Sciences, University of California, Santa Cruz, 1156 High St, Santa Cruz, CA 95062, HORTON, Brian K., Department of Geological Sciences and Institute for Geophysics, University of Texas at Austin, Austin, TX 78712, GROVE, Marty, Department of Earth and Space Sciences, University of California-Los Angeles, Los Angeles, CA 90095-1567 and GIOVANNI, Melissa K., Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada, bmcnulty@csudh.edu, bmcnulty@csudh.edu

6

3:15 PM

TECTONIC AND THERMAL EVOLUTION OF THE CORDILLERA BLANCA DETACHMENT SYSTEM, PERUVIAN ANDES: IMPLICATIONS FOR NORMAL FAULTING IN A CONTRACTIONAL OROGEN

GIOVANNI, Melissa K., Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada, HORTON, Brian K., Department of Geological Sciences, University of Texas at Austin, 1 University Station C1100, Austin, TX 78712, GROVE, Marty, Department of Earth and Space Sciences, University of California-Los Angeles, Los Angeles, CA 90095-1567 and MCNULTY, Brendan, Earth Science Dept, California State University Dominguez Hills, 1000 E. Victoria Street, Carson, CA 90747, mkgiovan@ucalgary.ca, mkgiovan@ucalgary.ca

3:35 PM

Break

7

3:55 PM

EXTENSION DURING ACTIVE COLLISION IN THIN-SKINNED WEDGES: INSIGHTS FROM LABORATORY EXPERIMENTS

HAQ, Saad S.B., Department of Earth and Atmospheric Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47906 and DAVIS, Dan M., Dept. of Geosciences, Stony Brook Univ, Stony Brook, NY 11794-2100, shaq@purdue.edu, shaq@purdue.edu

8

4:15 PM

INFLUENCE OF THE MARIA FOLD AND THRUST BELT ON STYLES OF OLIGO-MIOCENE EXTENSION IN WESTERN ARIZONA: APPLICATION OF CRITICAL-TAPER THEORY

SPENCER, Jon E., Arizona Geological Survey, 416 W. Congress St., #100, Tucson, AZ 85704 and RICHARD, Stephen M., Arizona Geological Survey, 416 W. Congress, #100, Tucson, AZ 85701-1381, jon.spencer@azgs.az.gov, jon.spencer@azgs.az.gov

9

4:35 PM

MULTIPLE TRIGGERS FOR MULTIPLE EPISODES OF SYNCONVERGENT EXTENSION IN THE SEVIER HINTERLAND

WELLS, Michael L., Dept. of Geoscience, Univ of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154-4010 and HOISCH, Thomas D., Geology, Northern Arizona Univ, Box 4099, Flagstaff, AZ 86011, michael.wells@unlv.edu, michael.wells@unlv.edu

10

4:55 PM

TEXTURAL EVIDENCE FROM GARNET SCHIST FOR A MAJOR SYNCONVERGENT EXHUMATION EVENT IN THE HINTERLAND OF THE SEVIER OROGENIC BELT

HOISCH, Thomas D., Department of Geology, Northern Arizona University, Box 4099, Flagstaff, AZ 86011 and WELLS, Michael L., Dept. of Geoscience, Univ of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154-4010, thomas.hoisch@nau.edu, thomas.hoisch@nau.edu

11

5:15 PM

THERMOBAROMETRIC CONSTRAINTS ON THE TECTONIC EVOLUTION OF THE NORTHERN SNAKE RANGE METAMORPHIC CORE COMPLEX, EASTERN NEVADA

COOPER, Frances J. and PLATT, John P., Department of Earth Sciences, University of Southern California, Zumberge Hall of Science, 3651 Trousdale Parkway, Los Angeles, CA 90089-0740, fcooper@usc.edu, fcooper@usc.edu

12

5:35 PM

THE ESPIRITU CANYON SHEAR ZONE IN THE FOOTWALL OF THE SAN PEDRO – CATALINA DETACHMENT FAULT EAST OF TUCSON, ARIZONA: AN EXHUMED, DEEP-SEATED SEGMENT OF THE SAN XAVIER DETACHMENT FAULT?

RICHARD, Stephen M., Arizona Geological Survey, 416 W. Congress, #100, Tucson, AZ 85701-1381, SPENCER, Jon E., Arizona Geological Survey, 416 W. Congress St., #100, Tucson, AZ 85704 and BYKERK-KAUFFMAN, Ann, Geological and Environmental Sciences, California State Univ, Chico, 400 W. 1st St, Chico, CA 95929-0205, steve.richard@azgs.az.gov, steve.richard@azgs.az.gov

5:55 PM

Concluding Remarks

Cordilleran Section (104th Annual) and Rocky Mountain Section (60th Annual) Joint Meeting (19–21 March 2008)

T1. Driving Mechanisms and Structural Styles of Synconvergent Extension