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GSA Annual Meeting in Denver, Colorado, USA - 2016

Session No. 164
Monday, 26 September 2016: 9:00 AM-6:30 PM
Exhibit Hall E/F (Colorado Convention Center)

T154. Recent Advances in Understanding Magmatism along and within the Northern North American Cordillera (Posters)

GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; Geochemical Society; GSA Structural Geology and Tectonics Division
Authors will be present from 4:30 to 6:30 PM.
164-1
318
INCEPTION OF THE WRANGELL ARC: GEOCHEMISTRY AND PETROGRAPHY OF THE OLIGO-MIOCENE SONYA CREEK VOLCANIC FIELD, SOUTH-CENTRAL ALASKA
BERKELHAMMER, Samuel E.1, BRUESEKE, Matthew E.1, TROP, Jeffrey M.2, BENOWITZ, Jeff3, DAVIS, Kailyn3 and LAYER, Paul W.3, (1)Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, (2)Department of Geology and Environmental Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (3)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, samwise930@ksu.edu
164-2
319
VOLCANIC STRATIGRAPHY OF THE ~2.4 MA EUCHER MOUNTAIN VOLCANO, WRANGELL ARC, ALASKA (U.S.A.)
KEAST, Ryan T.1, BRUESEKE, Matthew E.1, TROP, Jeffrey M.2, BERKELHAMMER, Samuel E.1 and BENOWITZ, Jeff3, (1)Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, (2)Department of Geology and Environmental Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (3)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, keast43@ksu.edu
164-3
320
STUCK IN THE MIDDLE: STRATIGRAPHY AND GEOCHEMISTRY OF VOLCANIC ROCKS FROM THE GREEN HILLS IN THE CENTRAL WRANGELL ARC, ALASKA
FITZGERALD, Victoria T.1, BRUESEKE, Matthew E.1, BERKELHAMMER, Samuel E.1, TROP, Jeffrey M.2, BENOWITZ, Jeff3, LAYER, Paul W.3 and DAVIS, Kailyn3, (1)Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, (2)Department of Geology and Environmental Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (3)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, vtf@ksu.edu
164-4
321
LINKING GEOCHEMISTRY OF CENOZOIC VOLCANIC CLASTS FROM THE WRANGELL ARC, ALASKA, TO UPPER PLATE AND SUBDUCTING SLAB TECTONIC PROCESSES
MORTER, Bethany K.1, BRUESEKE, Matthew E.1, BENOWITZ, Jeff2, TROP, Jeffrey M.3, DAVIS, Kailyn2 and LAYER, Paul W.2, (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 Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, bmorter@ksu.edu
164-5
322
U-PB AND 40AR/39AR DETRITAL GEOCHRONOLOGY OF MODERN RIVER SEDIMENTS IN THE WRANGELL MOUNTAINS, ALASKA: IMPROVED CONSTRAINTS ON THE AGE AND TECTONIC EVOLUTION OF JURASSIC-QUATERNARY MAGMATISM
TROP, Jeffrey M.1, BENOWITZ, Jeff2, DAVIS, Kailyn N.2, LAYER, Paul W.2 and BRUESEKE, Matthew E.3, (1)Department of Geology and Environmental Geosciences, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, (2)Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, (3)Department of Geology, Kansas State University, Manhattan, KS 66506, jtrop@bucknell.edu
164-6
323
ZIRCON U-PB AND AR-AR GEOCHRONOLOGY, HF ISOTOPE, AND TRACE ELEMENT CONSTRAINTS ON TEMPORAL TRENDS IN MAGMA COMPOSITION: ALASKA PENINSULA
TAKACH, Marie K.1, COLE, Ron B.1, YANG, Jin-Hui2, TODD, Erin3 and JICHA, Brian R.4, (1)Department of Geology, Allegheny College, 520 N Main St, Meadville, PA 16335, (2)Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing, 100029, China, (3)U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK 99508, (4)Department of Geoscience, University of Wisconsin, 1215 W. Dayton St., Madison, WI 53706, marie.takach@gmail.com
164-7
324
A ZIRCON-BASED INVESTIGATION INTO TEPHRAS OF UNCERTAIN ORIGINS: A CASE STUDY WITH THE OLD CROW TEPHRA IN CENTRAL ALASKA
SOSA, Emma S.1, CARLEY, Tamara L.1, JENSEN, Britta J.L.2 and COBLE, Matthew A.3, (1)Department of Geology and Environmental Geosciences, Lafayette College, Easton, PA 18042, (2)Royal Alberta Museum, Edmonton, AB T5N 0M6, Canada, (3)Department of Geological Sciences, Stanford University, Bldg 320, 450 Serra Mall, Stanford, CA 94305-2115, sosae@lafayette.edu
164-8
325
A SYNTHESIS OF NORTHERN CIRCUM-PACIFIC MAGMATISM AND TECTONISM ASSOCIATED WITH CIRCUM-ARCTIC LITHOSPHERE EVOLUTION (CALE) TRANSECT C
MILLER, Elizabeth L.1, MEISLING, Kristian E.1, AKININ, Vyacheslav V.2, BRUMLEY, Kelley3, COAKLEY, Bernard4, GOTTLIEB, Eric S.1, HOILAND, Carl W.1, O'BRIEN, Tim M.1 and TORO, Jaime5, (1)Department of Geological Sciences, Stanford University, Stanford, CA 94305, (2)Russian Academy of Sciences, NEISRI, Portovaya 16, Magadan, 685000, Russia, (3)Fugro Marine GeoServices, Houston, TX 77081, (4)Dept. of Geology and Geophysics, University of Alaska, Fairbanks, 900 Yukon Dr, Fairbanks, AK 99775, (5)Geology and Geography, West Virginia University, 98 Beechurst Ave, 330 Brooks Hall, Morgantown, WV 26506, elmiller@stanford.edu
164-9
326
GEOLOGICAL EVIDENCE FROM THE DOONERAK FENSTER AND THE ENDICOTT MOUNTAINS ALLOCHTHON OF THE CENTRAL BROOKS RANGE, ALASKA: INSIGHTS INTO THE ASSEMBLY OF THE ARCTIC ALASKA TERRANE
FRIER, William P.1, JOHNSON, Benjamin1, TORO, Jaime1, HAMMOND, Greg1 and STRAUSS, Justin V.2, (1)Department of Geology & Geography, West Virginia University, Morgantown, WV 26506, (2)Department of Earth Sciences, Dartmouth College, HB6105 Fairchild Hall, Hanover, NH 03755, wpfrier@mix.wvu.edu
164-10
327
U-PB GEOCHRONOLOGY AND LU-HF ISOTOPIC DATA OF MAGMATIC AND METAMORPHIC ZIRCONS FROM THE SAWTOOTH METAMORPHIC COMPLEX: IMPLICATIONS FOR CRUSTAL THICKENING IN THE CENTRAL IDAHO HINTERLAND OF THE U.S. CORDILLERA
MA, Chong1, FOSTER, David A.2, MUELLER, Paul A.2 and DUTROW, Barbara L.3, (1)Department of Geosciences, Auburn University, 210 Petrie Hall, Auburn, AL 36849, (2)Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32611, (3)Department of Geology & Geophysics, Louisiana State University, Baton Rouge, LA 70803, chongma@auburn.edu
164-11
328
PETROLOGICAL AND GEOCHEMICAL ANALYSIS OF THE CHALLIS FORMATION VOLCANIC SUITE (IDAHO)
BORDIERI, Nicholas R., Geosciences, University of South Florida, 4202 E Fowler Ave, Tampa, FL 33620, GERMA, Aurélie, Department of Geology, University of South Florida, 4202 East Fowler Avenue, SCA 528, Tampa, FL 33620 and CONNOR, Charles, School of Geosciences, University of South Florida, 4202 East Fowler Ave., Tampa, FL 33620, nbordieri@mail.usf.edu
164-12
329
STATISTICS AND SEGMENTATION: A ROBUST AND UNBIASED ANALYSIS OF CASCADE ARC VARIABILITY
PITCHER, Bradley W., CEOAS, Oregon State University, 101 SW 26th St, Corvallis, OR 97333 and KENT, Adam J.R., College of Earth, Ocean & Atmospheric Sciences, Oregon State University, 104 Ocean Admin, Corvallis, OR 97331, pitcherb@oregonstate.edu
164-13
330
40AR/39AR AND PALEOMAGNETIC CONSTRAINTS ON THE AGE AND AREAL EXTENT OF THE PICABO VOLCANIC FIELD: IMPLICATIONS FOR THE YELLOWSTONE HOTSPOT
ANDERS, Mark H.1, DIVENERE, Victor J.2, GOMBINER, Joel H.3 and HEMMING, Sidney R.3, (1)Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA 22030, (2)Earth and Environmental Science, Long Island University, Brookville, NY 11548, (3)Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, manders@ldeo.columbia.edu
164-14
331
PEACH SPRING TUFF (AZ, USA): IMPLICATIONS OF ZONATION FOR THE SUPERERUPTION AND RECONSTRUCTION OF CHAMBER STRATIGRAPHY
FOLEY, Michelle L.1, MILLER, Calvin F.1, FERGUSON, Charles A.2 and BARRY, Erin E.3, (1)Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (2)Arizona Geological Survey, 1955 E. 6th Street, Tucson, AZ 85721, (3)Geology Department, Pomona College, 185 E. 6th St, Claremont, CA 91711, michelle.l.foley.1@vanderbilt.edu
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