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GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 107
Monday, 23 October 2017: 8:00 AM-12:00 PM
Skagit 4 (The Conference Center)

T162. The Dance of Arcs: Causes of Arc Migrations, Flare-Ups, and Magmatic Focusing I

GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; GSA Structural Geology and Tectonics Division
Scott R. Paterson, Vali Memeti, Joshua Schwartz, Katie E. Ardill and Anita Grunder, Advocates
 
8:00 AM
Introductory Remarks
107-1
8:05 AM
MAGMATIC FLARE-UPS IN A NEOPROTEROZOIC OCEANIC ARC SYSTEM (ANTI-ATLAS, MOROCCO)
TRIANTAFYLLOU, Antoine, Laboratoire de Planetologie & Geodynamique, University of Nantes, 2, rue de la Houssiniere, Nantes, 44300, France and BERGER, Julien, Laboratoire Geoscience Environnement Toulouse, Universite Paul Sabatier Toulouse, 14, Avenue Edouard Belin, Toulouse, 31400, France, antoine.triantafyllou@univ-nantes.fr
107-2
8:20 AM
ROSS OROGENY MAGMATISM IN NORTHERN VICTORIA LAND, ANTARCTICA: INSIGHT INTO ALONG-STRIKE ARC VARIATION AND COMPARISON TO THE DETRITAL ZIRCON RECORD
ERICKSON, Elizabeth A., Dept of Earth Science, University of California, Santa Barbara, CA 93106-9630 and COTTLE, John M., Dept of Earth Science, University of California, Santa Barbara, Santa Barbara, CA 93106-9630, eaerickson@umail.ucsb.edu
107-3
8:35 AM
A TECTONIC CONTROL ON THE TIMING, CHEMISTRY AND SCALE OF VOLUMINOUS PULSED INTRUSIVE MAGMATISM: EVIDENCE FROM THE LASSITER COAST INTRUSIVE SUITE, ANTARCTICA
BURTON-JOHNSON, Alex1, RILEY, Teal1, HARRISON, Richard J.2 and MAC NIOCAILL, Conall3, (1)Geology & Geophysics, The British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom, (2)Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom, (3)Department of Earth Sciences, Oxford University, South Parks Road, Oxford, OX1 3AN, United Kingdom, alerto@bas.ac.uk
107-4
8:50 AM
TECTONIC FORCING OF MAGMATIC PROCESSES IN PANAMA: COLLISION, INTRA-ARC EXTENSION AND SLAB-DETACHMENT
FARRIS, David W., Geology, Washington and Lee University, 204 West Washington Street, Lexington, VA 24450, FOWLER III, Gary D., Earth, Ocean and Atmospheric Sciences, Florida State University, 909 Antarctic Way, Carraway Building, Tallahassee, FL 32306 and MUNSEY, Keith R., Earth, Ocean and Atmospheric Science, Florida State University, 909 Antarctic Way, Tallahassee, FL 32306, farrisd@wlu.edu
107-5
9:05 AM
THE DYNAMICS OF SYNCHRONOUS FLARE-UPS, MIGRATION, AND FOCUSING IN THE MESOZOIC SIERRA NEVADA ARC
ARDILL, Katie E.1, PATERSON, Scott R.1 and MEMETI, Vali2, (1)Department of Earth Sciences, University of Southern California, 3651 Trousdale Pkwy, Los Angeles, CA 90089, (2)Department of Geological Sciences, California State University Fullerton, 800 N State College Blvd, Fullerton, CA 92831, kardill@usc.edu
107-6
9:20 AM
EIGHT MILLION YEARS OF FOCUSED MAGMATISM: THE STRUCTURAL SETTING AND INTRUSIVE HISTORY OF THE MOUNT WHITNEY INTRUSIVE SUITE, SIERRA NEVADA, CALIFORNIA
HIRT, William H.1, POLON, Casey K.2, PLUHAR, Chris J.2 and GLEDHILL, Trevor A.2, (1)Biological and Physical Sciences, College of the Siskiyous, 800 College Avenue, Weed, CA 96094, (2)Earth and Environmental Sciences, Fresno State University, 2576 East San Ramon Ave, M/S ST24, Fresno, CA 93740, hirt@siskiyous.edu
107-7
9:35 AM
EPISODIC SIERRAN ARC MAGMATISM EXPRESSED IN VOLCANIC STRATA OF THE MOUNT MORRISON PENDANT, EAST-CENTRAL SIERRA NEVADA, CALIFORNIA
FIELD, Derek, School of Earth Sciences and Sustainability, Northern Arizona University, PO Box 4099, Flagstaff, AZ 86001-4099, RIGGS, Nancy, School of Earth Sciences and Environmental Sustainability, Northern Arizona University, PO Box 4099, Flagstaff, AZ 86011-4099 and BARTH, Andrew, Earth Sciences, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, dmf259@nau.edu
 
9:50 AM
Discussion
107-8
10:05 AM
EPISODICITY AND THE DANCE OF MAGMATISM AND DEFORMATION ALONG THE NORTHERN CIRCUM-PACIFIC MARGIN: NE RUSSIA TO THE CORDILLERA (Invited Presentation)
MILLER, Elizabeth L., Department of Geological Sciences, Stanford University, Stanford, CA 94305 and AKININ, Vyacheslav V., Russian Academy of Sciences, NEISRI, Portovaya 16, Magadan, 685000, Russia, elmiller@stanford.edu
107-9
10:20 AM
DISTINCT MAGMATIC STAGES ASSOCIATED WITH CRETACEOUS THROUGH PALEOGENE CRUSTAL FORMATION AND EVOLUTION OF THE SOUTHERN ALASKA MARGIN
TODD, Erin, U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK 99508 and JONES III, James V., U.S. Geological Survey, Box 25046, DFC, MS 980, Denver, CO 80225, etodd@usgs.gov
107-10
10:35 AM
DATING THE LOST ARC OF ALASKA: CONSTRAINING THE TIMING OF INITIATION OF THE WRANGELL ARC WITH A NEW 40AR/39AR DETRITAL GEOCHRONOLOGY APPROACH ON MODERN RIVER LITHIC GRAINS
DAVIS, Kailyn N.1, BENOWITZ, Jeff2, LAYER, Paul W.2, TROP, Jeffrey M.3 and BRUESEKE, Matthew E.4, (1)Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775, (2)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, (3)Department of Geology and Environmental Sciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (4)Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, kndavis@alaska.edu
107-11
10:50 AM
INITIATION OF THE WRANGELL ARC: A RECORD OF TECTONIC CHANGES IN AN ARC-TRANSFORM JUNCTION REVEALED BY NEW GEOCHEMISTRY AND GEOCHRONOLOGY OF THE ~29–18 MA SONYA CREEK VOLCANIC FIELD, ALASKA
BERKELHAMMER, Samuel E.1, BRUESEKE, Matthew E.1, BENOWITZ, Jeff A.2, TROP, Jeffrey M.3, DAVIS, Kailyn N.2, LAYER, Paul W.2 and MERTZMAN, Stanley A.4, (1)Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, (2)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, (3)Department of Geology and Environmental Sciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (4)Earth and Environment, Franklin and Marshall College, P.O. Box 3003, Lancaster, PA 17604-3003, samwise930@ksu.edu
107-12
11:05 AM
INVESTIGATING THE LOST ARC: GEOLOGIC CONSTRAINTS ON ~29 MILLION YEARS OF CONTINUOUS MAGMATISM ALONG AN ARC-TRANSFORM JUNCTION, WRANGELL ARC, ALASKA
BENOWITZ, Jeff A.1, TROP, Jeffrey M.2, BRUESEKE, Matthew E.3, DAVIS, Kailyn N.4, LAYER, Paul4, BERKELHAMMER, Samuel E.3, BLISS, Ben2 and MORTER, Bethany K.3, (1)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, (2)Department of Geology and Environmental Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (3)Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, (4)Geophysical Institute, University of Alaska Fairbanks, P.O. Box 755780, Fairbanks, AK 99775, jbenowitz@alaska.edu
107-13
11:20 AM
GEOCHEMICAL VARIABILITY AND U-PB DATING OF COEVAL PLUTONIC AND VOLCANIC ROCKS FROM UNALASKA ISLAND, ALASKA
TRIM, Charelle S., PERFIT, Michael and MUELLER, Paul A., Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32611, charellestrim@ufl.edu
 
11:35 AM
Discussion
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