2015 GSA Annual Meeting in Baltimore, Maryland, USA (1-4 November 2015)

Session No. 195
Tuesday, 3 November 2015: 8:00 AM-12:00 PM
Room 331/332 (Baltimore Convention Center)

T162. A Lower Crustal Perspective on Magmatic Arc Processes

GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division
Harold H. Stowell, Keith Klepeis and Joshua J. Schwartz, Session Chairs
Paper #
Start Time
 
8:00 AM
Introductory Remarks
8:05 AM
STRUCTURAL AND PETROLOGIC IMPLICATIONS OF MAGMATIC UNDERPLATING IN A CONTINENTAL ARC: OBSERVATIONS FROM THE ATHABASCA GRANULITE TERRANE
WILLIAMS, Michael L.1, SEAMAN, Sheila J.2, MAHAN, Kevin H.3, DUMOND, Gregory4, KOTEAS, G. Christopher5 and REGAN, Sean P.1, (1)Department of Geosciences, University of Massachusetts, Amherst, 611 North Pleasant Street, Amherst, MA 01003, (2)Department of Geosciences, University of Massachusetts Amherst, 611 North Pleasant Street, 233 Morrill Science Center, Amherst, MA 01003, (3)Department of Geological Sciences, University of Colorado at Boulder, 2200 Colorado Ave, Boulder, CO 80309-0399, (4)Geosciences, University of Arkansas, Fayetteville, AR 72701, (5)Earth and Environmental Sciences, Norwich University, 158 Harmon Drive, Northfield, VT 05663, mlw@geo.umass.edu
8:25 AM
USING PSEUDOSECTIONS TO EVALUATE CHANGING EFFECTIVE BULK COMPOSITION DURING GARNET GROWTH AND PARTIAL MELTING, EXAMPLES FROM FIORDLAND, NZ
NORTON, Rebecca A.1, STOWELL, Harold H.1 and SCHWARTZ, Joshua J.2, (1)Geological Sciences, University of Alabama, Tuscaloosa, AL 35487, (2)Department of Geological Sciences, California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330, ranorton@crimson.ua.edu
8:40 AM
PLATINUM GROUP ELEMENT CONCENTRATIONS OF CHILAS COMPLEX GABBROS, KOHISTAN ARC LOWER CRUST, PAKISTAN
AHMAD, Ijaz1, RICHARDS, Jeremy P.1, SHAH, Mohammad Tahir2, PEARSON, D. Graham1, DUFRANE, S. Andrew1, LIU, Jingao1 and JAGOUTZ, Oliver3, (1)Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Science Building, Edmonton, AB T6G 2E3, Canada, (2)National Centre of Excellence in Geology, University of Peshawar, Peshawar, 25120, Pakistan, (3)Earth, Atmospheric and Planetary Sciences Department, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, ijaz1@ualberta.ca
8:55 AM
SPATIAL AND TEMPORAL PATTERNS OF MELT MIGRATION AND STRAIN LOCALIZATION IN THE TWIN SISTERS ULTRAMAFIC MASSIF, WASHINGTON STATE
KRUCKENBERG, Seth C., Earth and Environmental Sciences, Boston College, Chestnut Hill, MA 02467 and TIKOFF, Basil, Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton St, Madison, WI 53706, seth.kruckenberg@bc.edu
9:10 AM
U-PB GEOCHRONOLOGY AND HF ISOTOPE GEOCHEMISTRY OF THE SOUTHERN COAST MOUNTAINS BATHOLITH, BRITISH COLUMBIA
YOKELSON, Intan N., Department of Geosciences, University of Arizona, 1040 E 4th Street, Tucson, AZ 85721, GEHRELS, George, Dept. of Geosciences, University of Arizona, Tucson, AZ 85721, CECIL, M. Robinson, Department of Geological Sciences, California State University Northridge, 18111 Nordhoff St, Northridge, CA 91130-8266 and RUSMORE, Margaret E., Geology, Occidental College, Los Angeles, CA 90041, iny@email.arizona.edu
9:25 AM
PORTRAIT OF A PLUTON: AN INTEGRATED OBSERVATIONAL, ANALYTICAL AND MODELING STUDY OF THE MID-CRUSTAL BERGELL INTRUSION, CENTRAL ALPS
SAMPERTON, Kyle M.1, SCHOENE, Blair1 and ANNEN, Catherine2, (1)Department of Geosciences, Princeton University, Guyot Hall, Princeton, NJ 08544, (2)School of Earth Sciences, Univeristy of Bristol, Office G37, Wills Memorial Building, Queen's Road, Clifton, Bristol, BS8 1RJ, United Kingdom, ksampert@princeton.edu
9:40 AM
SPATIO-TEMPORAL PATTERNS OF LOWER ARC COOLING AND METAMORPHISM, NORTHERN FIORDLAND, NEW ZEALAND
GEBAUER, Samantha K., Geological Sciences, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA 91330, SCHWARTZ, Joshua J., Department of Geological Sciences, California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330, KLEPEIS, Keith A., Geology, University of Vermont, Trinity Campus, Burlington, VT 05405, STOWELL, Harold H., Department of Geological Sciences, University of Alabama, BOX 870338, Tuscaloosa, AL 35487, COBLE, Matthew A., Department of Geological Sciences, Stanford University, Stanford, CA 94305, KYLANDER-CLARK, Andrew, Department of Earth Science, University of California, Santa Barbara, CA 93106 and HACKER, Bradley R., Department of Earth Science, University of California, Santa Barbara, Santa Barbara, CA 93106, samantha.gebauer.513@my.csun.edu
9:55 AM
TRIGGERING MECHANISMS FOR A MAGMATIC FLARE-UP IN THE LOWER CRUST OF A CONTINENTAL ARC, FIORDLAND, NEW ZEALAND
DECKER, Meghann F.I.1, SCHWARTZ, Joshua J.1, STOWELL, Harold H.2, KLEPEIS, Keith3, KITAJIMA, Kouki4, VALLEY, John5, KYLANDER-CLARK, Andrew6, TULLOCH, Andrew7 and KIMBROUGH, David L.8, (1)Department of Geological Sciences, California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330, (2)Geological Sciences, University of Alabama, Tuscaloosa, AL 35487, (3)Department of Geology, University of Vermont, Trinity Campus, 180 Colchester Ave, Burlington, VT 05405, (4)Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton St, Madison, WI 53706, (5)Department of Geoscience, University of Wisconsin, Madison, WI 53706, (6)Geological Sciences, UC, Santa Barbara, Department of Geological Sciences, UC Santa Barbara—Building 526, Santa Barbara, CA 93106-9630, (7)Institute of Geol & Nuclear Sciences, 764 Cumberland St, Dunedin, New Zealand, (8)Department of Geological Sciences, San Diego State University, San Diego, CA 92182, meghanndecker@gmail.com
10:10 AM
FLOW AND DEFORMATION IN DEEP-ARC CRUST
MILLER, Robert B., Department of Geology, San José State University, One Washington Square, San Jose, CA 95192, GORDON, Stacia M., Department of Geological Sciences, University of Nevada, Reno, 1664 N. Virginia Street, Reno, NV 89557 and SAUER, Kirsten, Department of Geological Sciences and Engineering, University of Nevada, Reno, 1664 N. Virginia Street, Reno, NV 89557, robert.b.miller@sjsu.edu
 
10:30 AM
Break
10:45 AM
PUNCTUATED MELT-ENHANCED DEFORMATION AND TECTONIC REACTIVATION ABOVE A LONG-LIVED SUBDUCTION ZONE, COASTAL ANDES, CENTRAL CHILE
WEBB, Laura E., Department of Geology, University of Vermont, 180 Colchester Ave., Burlington, VT 05405 and KLEPEIS, Keith, Department of Geology, University of Vermont, Trinity Campus, 180 Colchester Ave, Burlington, VT 05405, lewebb@uvm.edu
11:00 AM
PRESERVING VARYING DEFORMATION HISTORIES IN ACTIVE ARCS: A CASE STUDY OF THE SIERRA NEVADA BATHOLITH, CALIFORNIA
NADIN, Elisabeth S., Department of Geology and Geophysics, University of Alaska Fairbanks, Fairbanks, AK 99775 and SALEEBY, Jason B., Division of Geological and Planetary Sciences, California Institute Technology, Pasadena, CA 91125-0001, enadin@alaska.edu
11:15 AM
OLIVINE-RICH TROCTOLITES: GEOCHEMICAL AND MICROSTRUCTURAL EVIDENCE OF THEIR MANTLE ORIGIN
GARAPIC, Gordana1, FAUL, Ulrich2, KRUCKENBERG, Seth C.3, WIEJACZKA, Joshua4 and NEWTON, John4, (1)Geology Department, SUNY New Paltz, 1 Hawk Dr, New Paltz, NY 12561, (2)Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, (3)Earth and Environmental Sciences, Boston College, Chestnut Hill, MA 02467, (4)Geology, SUNY New Paltz, 1 Hawk Dr, New Paltz, NY 12561, garapicg@newpaltz.edu
11:30 AM
MELT-ROCK INTERACTIONS: INFINITE SOURCE OF NEW MANTLE LITHOLOGIES
LAMBART, Sarah, Earth and Planetary Sciences, University of California Davis, One Shields Ave, Davis, CA 95616, slambart@ucdavis.edu
 
11:45 AM
Discussion
See more of: Technical Sessions