2014 GSA Annual Meeting in Vancouver, British Columbia (19–22 October 2014)

Session No. 207
Tuesday, 21 October 2014: 9:00 AM-6:30 PM
Exhibition Hall C (Vancouver Convention Centre-West)

T122. Magmatism and Geodynamics within the Cascadia Subduction Zone (Posters)

Cordilleran Section of the Geological Association of Canada; GSA Geophysics Division; Geochemical Society; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; GSA Structural Geology and Tectonics Division
Authors will be present from 2:00 to 4:00 PM, and 5:00 to 6:30 PM.
Paper #
Booth #
37
THE MOUNT AIX CALDERA:  LITHOLOGIC AND CHEMICAL CHARACTERISTICS OF THE BUMPING RIVER TUFF
PATRIDGE, Karyn A., 3025 NE 8th Ave, Portland, OR 97212 and HAMMOND, Paul E., 1305 SW Upland Dr, Portland, OR 97221, karynpatridge@gmail.com
38
HIGH-MG ANDESITES FROM THE NORTHERN CASCADE ARC: USING MINERAL CHEMISTRY TO DISTINGUISH BETWEEN HYPOTHESES FOR PETROGENESIS
SAS, May, Geology, Western Washington University, 516 High Street, Bellingham, WA 98225, DEBARI, Susan M., Geology, Western Washington University, M.S. 9080, Bellingham, WA 98225, CLYNNE, Michael A., Volcano Hazards Team, USGS, Menlo Park, CA 94025 and RUSK, Brian G., Dept. of Geology, Western Washington University, 516 High St, Bellingham, WA 98225, msas.geo@gmail.com
39
BIMODAL VOLCANISM IN UPPER OLIGOCENE-LOWER MIOCENE ROCKS OF SOUTHWEST OREGON
D'ALLURA, Jad Alan, Chemistry, Physics, Materials, and Engineering Department, Southern Oregon University, 1250 Siskiyou Blvd, Ashland, OR 97520, rockit526@gmail.com
40
EXTREME 231PA-ENRICHMENT IN YOUNG CASCADE ARC LAVAS
MITCHELL, Euan C.1, ASMEROM, Yemane2 and POLYAK, Victor J.2, (1)Department of Geology, Washington and Lee University, 204 W Washington St, Lexington, VA 24450, (2)Earth and Planetary Sciences, University of New Mexico, 221 Yale Blvd, Northrop Hall, Albuquerque, NM 87131, mitchelle@wlu.edu
41
PB AND HF ISOTOPE DATA FOR MAFIC LAVAS FROM THE THREE SISTERS AND NEWBERRY VOLCANO REGIONS OF THE CENTRAL OREGON CASCADES
KYEONG PIL, Kong1, MITCHELL, Euan C.1, ASMEROM, Yemane2 and POLYAK, Victor J.2, (1)Geology, Washington and Lee University, Lexington, VA 24450, (2)Earth and Planetary Sciences, University of New Mexico, 221 Yale Blvd, Northrop Hall, Albuquerque, NM 87131, kongk15@mail.wlu.edu
42
FELSIC MAGMAS FROM MT. BAKER IN THE NORTHERN CASCADE ARC: ORIGIN AND ROLE IN ANDESITE PRODUCTION
FILER, Julie, Geology Department, Western Washington University, 516 High St, Bellingham, WA 98225-9080, DEBARI, S.M., Geology, Western Washington University, M.S. 9080, Bellingham, WA 98225 and CLYNNE, Michael A., Volcano Hazards Team, USGS, Menlo Park, CA 94025, julie.gross@wwu.edu
43
TIMESCALES OF OPEN-SYSTEM MAGMATIC PROCESSES: INSIGHTS FROM TEXTURAL STUDIES AND DIFFUSION MODELING IN PLAGIOCLASE FROM MOUNT JEFFERSON, OREGON
DIGIULIO, Jennifer P., College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 Wilkinson Hall, Corvallis, OR 97331, NIELSEN, Roger, Department of Geosciences, Oregon State University, 104 Wilkinson Hall, Oregon State University, Corvallis, OR 97331 and TEPLEY, Frank, Marine Geology & Geophysics, Oregon State University, Corvallis, OR 97331-5503, digiulij@onid.orst.edu
44
PETROGENESIS OF INTERMEDIATE MAGMAS AT MOUNT BAKER VOLCANIC FIELD, NORTHERN CASCADE ARC
ESCOBAR, Ricardo Daniel, Geology, Western Washington University, 516 High St, Bellingham, WA 98225 and DEBARI, S.M., Geology, Western Washington University, M.S. 9080, Bellingham, WA 98225, escobar@students.wwu.edu
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