Session: Crustal Cross Sections from the Western North America Cordillera and Elsewhere—Implications for Tectonic and Petrologic Processes (Cordilleran Section - 101st Annual Meeting (April 29

Paper #

Start Time

1:10 PM

Introductory Remarks

1

1:20 PM

CRUSTAL EVOLUTION DURING THE LAST 105 MILLION YEARS, CENTRAL COAST OROGEN, BC AND SOUTHEASTERN ALASKA

CRAWFORD, Maria Luisa, Bryn Mawr College, 101 N Merion Ave, Bryn Mawr, PA 19010-2899, mcrawfor@brynmawr.edu, mcrawfor@brynmawr.edu

2

1:40 PM

IMPLICATIONS FOR TECTONIC AND MAGMATIC PROCESSES FROM THE ~5 TO 40 KM NORTH CASCADES CRUSTAL SECTION, WASHINGTON

MATZEL, Jennifer, Berkeley Geochronology Ctr, 2455 Ridge Road, Berkeley, CA 94709, MILLER, Robert, Department of Geology, San Jose State Univ, San Jose, CA 95192-0102, PATERSON, Scott, Dept. of Earth Sciences, Univ of Southern California, 3651 Trousdale Ave, Los Angeles, CA 90089-0740 and BOWRING, Samuel A., Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, jmatzel@bgc.org, jmatzel@bgc.org

3

2:00 PM

SALINIA: A CRUSTAL CROSS SECTION THROUGH A SHALLOW SUBDUCTION ZONE EXPOSING THE SUBDUCTION MEGATHRUST

DUCEA, Mihai N., Geosciences, Univ of Arizona, Tucson, AZ 85721, KIDDER, Steven, Department of Geological Sciences, Univ of Arizona, Tucson, AZ 85721 and CHESLEY, John, Department of Geosciences, Univ of Arizona, Tucson, AZ 85721, ducea@geo.arizona.edu, ducea@geo.arizona.edu

4

2:20 PM

USING ⁴⁰AR/³⁹AR THERMOCHRONOLOGY TO ASSESS THE TILTING AND EXHUMATION OF CONTINENTAL CRUSTAL SECTIONS: AN EXAMPLE FROM THE SIERRA MAZATAN CORE COMPLEX, SONORA, MEXICO

WONG, Martin, Geological Sciences, UC Santa Barbara, Santa Barbara, CA 93106 and GANS, Phillip, Geological Sciences, Univ of California, Santa Barbara, Department of Geological Sciences, University of California, Santa Barbara, CA 93106, mwong@umail.ucsb.edu, mwong@umail.ucsb.edu

5

2:40 PM

LINKING DEEP AND SHALLOW CRUSTAL PROCESSES IN EXTENDING CONTINENTAL CRUST: EXAMPLES FROM THE CENOZOIC BASIN AND RANGE AND THE CRETACEOUS OF THE BERING STRAIT

MILLER, Elizabeth, Geological and Environmental Sciences, Stanford Univ, Stanford, CA 94305-2115 and AKININ, Vyacheslav V., Russian Academy of Sciences, NEISRI, Portovaya 16, Magadan, 685000, Russia, miller@pangea.stanford.edu, miller@pangea.stanford.edu

3:00 PM

Break

6

3:20 PM

INVESTIGATING DEEP AND MIDDLE CRUSTAL PROCESSES IN ISOBARICALLY COOLED TERRANES: THE EAST ATHABASCA AREA OF CANADA AND THE PROTEROZOIC TERRANE OF SW-USA

WILLIAMS, Michael L., Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-5820, MAHAN, Kevin, Department of Geosciences, Univ of Massachusetts, Amherst, MA 01003-9297, DUMOND, Greg, Dept. of Geosciences, UMASS, Amherst, MA 01003, JERCINOVIC, Michael, Geosciences, Univ of Massachusetts, 611 N. Pleasant St, Amherst, MA 01003, KARLSTROM, Karl, Earth and Planetary Sciences, Univ of New Mexico, 200 Yale Blvd NE, Northrop Hall, Albuquerque, NM 87131 and BOWRING, S.A., Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, mlw@geo.umass.edu, mlw@geo.umass.edu

7

3:40 PM

A P-T-TIME-DEFORMATION PATH FOR EXPOSED DEEP CONTINENTAL CRUST IN THE SNOWBIRD TECTONIC ZONE, WESTERN CANADIAN SHIELD

MAHAN, Kevin H., Geosciences, Univ of Massachusetts, 611 N. Pleasant St, Amherst, MA 01003, FLOWERS, Rebecca M., Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Bldg. 54-1114, Cambridge, MA 02139, WILLIAMS, Michael L., Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-5820, GONCALVES, Philippe, Département des Géosciences, Université de Franche-Comté, 16 route de Gray, Besançon, 25030, France, BOWRING, Samuel A., Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307 and JERCINOVIC, Michael J., Department of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-9297, kmahan@geo.umass.edu, kmahan@geo.umass.edu

8

4:00 PM

DUCTILE FLOW IN A THERMALLY-EVOLVING LOWER CRUST AND ITS RELATIONSHIP TO DEFORMATION IN THE MIDDLE AND UPPER CRUST OF A CORDILLERAN-STYLE MAGMATIC ARC IN WESTERN NEW ZEALAND

KLEPEIS, Keith A.¹, KING, Daniel¹, GEHRELS, George², GOLDSTEIN, Arthur³ and CLARKE, Geoff⁴, (1)Department of Geology, Univ of Vermont, Burlington, VT 05405, (2)Geosciences, Univ of Arizona, Tucson, AZ 85721, (3)Dept. of Geology, Colgate Univ, Hamilton, NY 13346-1398, (4)School of Geosciences, Univ of Sydney, Sydney, 2006, Australia, kklepeis@ZOO.UVM.EDU, kklepeis@ZOO.UVM.EDU

9

4:20 PM

A STRUCTURAL TRANSECT ACROSS THE IVREA-VERBANO ZONE NEAR VARALLO SESIA, NORTHERN ITALY

SNOKE, Arthur W., Geology and Geophysics, Univ of Wyoming, 1000 E. University Avenue, Laramie, WY 82071 and KALAKAY, Thomas J., Earth and Environmental Sciences, Rocky Mountain College, 1511 Poly Drive, Billings, MT 59102, snoke@uwyo.edu, snoke@uwyo.edu

10

4:40 PM

THE ROLE OF PRE-EXISTING ANISOTROPIES AND PARTIAL MELT IN CONTROLLING STRAIN LOCALIZATION IN A PALEOZOIC LOWER CRUSTAL SUTURE ZONE, SIERRAS PAMPEANAS, WEST-CENTRAL ARGENTINA

MULCAHY, Sean R.¹, ROESKE, Sarah M.¹, MCCLELLAND, William C.², ELLIS, Joshua R.², NOMADE, Sebastien³ and VUJOVICH, Graciela I.⁴, (1)Geology Department, Univ of California, Davis, One Shields Avenue, Davis, CA 95616, (2)Geological Sciences, Univ of Idaho, Moscow, ID 83844, (3)Berkeley Geochronology Ctr, 2455 Ridge Road, Berkeley, CA 94709, (4)Department of Geology, Univ of Buenos Aires-CONICET, Ciudad Universitaria 1428, Buenos Aires, Argentina, mulcahy@geology.ucdavis.edu, mulcahy@geology.ucdavis.edu

Cordilleran Section - 101st Annual Meeting (April 29–May 1, 2005)

T5. Crustal Cross Sections from the Western North America Cordillera and Elsewhere—Implications for Tectonic and Petrologic Processes