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2009 Portland GSA Annual Meeting (18-21 October 2009)

Session No. 18
Sunday, 18 October 2009: 8:00 AM-12:00 PM
E143/144 (Oregon Convention Center)

T81. Multidisciplinary Studies of Cascade Volcanism and its Tectonic Setting I

Mineralogical Society of America; GSA Structural Geology and Tectonics Division; GSA Geophysics Division

 

Mariek Schmidt, Michael Rowe, Brian Jicha, Martin Streck, Roger Nielsen and Thomas W. Sisson, Advocates
Paper #
Start Time
1
8:00 AM
PRELIMINARY VOLUME ESTIMATES OF PRIMARY HOLOCENE RHYOLITIC TEPHRAS AT MEDICINE LAKE VOLCANO, NORTHERN CALIFORNIA
RAMSEY, David W.1, MILLER, C. Dan1 and EWERT, John W.2, (1)U.S. Geological Survey, Cascades Volcano Observatory, 1300 SE Cardinal Ct, Bldg 10, Ste 100, Vancouver, WA 98683, (2)Cascades Volcano Observatory, U.S. Geological Survey, 1300 SE Cardinal Court, Vancouver, WA 98683, dramsey@usgs.gov, dramsey@usgs.gov
2
8:15 AM
GEOCHEMICAL CONSTRAINTS ON THE EVOLUTION OF A SUBDUCTION-RELATED, REAR-ARC CONTINENTAL MAGMA SYSTEM: NEWBERRY VOLCANO, CENTRAL OREGON
TEMPLETON, Jeffrey H., Dept. of Earth and Physical Science, Western Oregon University, 345 N. Monmouth Ave, Monmouth, OR 97361, templej@wou.edu, templej@wou.edu
3
8:30 AM
WHAT IS NEWBERRY VOLCANO?
DONNELLY-NOLAN, Julie M., U.S. Geological Survey, 345 Middlefield Road, MS 910, Menlo Park, CA 94025, GROVE, Timothy, Earth, Atmospheric, and Planetary Sciences, MIT, Cambridge, MA 02139 and CARLSON, Richard, Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, jdnolan@usgs.gov, jdnolan@usgs.gov
4
8:45 AM
PETROLOGIC AND TECTONIC CONNECTIONS IN THE CASCADE ARC: WHAT WE KNOW AND WHAT WE'D LIKE TO KNOW
CONREY, Richard M., GeoAnalytical Lab, SEES, Washington State University, Pullman, WA 99164, conrey@mail.wsu.edu, conrey@mail.wsu.edu
5
9:05 AM
CASCADIA MAGMATISM PROVIDES UNIQUE INSIGHTS INTO SUBDUCTION ZONE (SZ) PROCESSES
LEEMAN, William P., Earth Science Division, National Science Foundation, 4201 Wilson Blvd, Arlington, VA 22230 and TONARINI, Sonia, Istituto di Geoscienze e Georisorse, C.N.R, Via Moruzzi, 1, Pisa, 56124, Italy, wleeman@nsf.gov, wleeman@nsf.gov
6
9:20 AM
VARIATIONS IN 187OS/188OS AMONG DIVERSE MAGMAS INDICATE ASSIMILATION OF YOUNG AND ANCIENT CRUST ALONG THE CASCADE ARC
SCHMIDT, Mariek, Department of Earth Sciences, Brock University, 500 Glenridge Avenue, St. Catharines, ON L2S 3A1, Canada, GRUNDER, Anita L., Geosciences, Oregon State University, 104 Wilkinson Hall, Corvallis, OR 97331 and CHESLEY, John T., Department of Geosciences, University of Arizona, Gould-Simpson Building #77, 1040 E. 4th St, Tucson, AZ 85721, mschmidt2@brocku.ca, mschmidt2@brocku.ca
7
9:35 AM
STRUCTURE AND SEISMICITY ALONG CASCADIA
ALLEN, Richard1, BOYARKO, Devin2, BRUDZINSKI, Michael2, EAKIN, Caroline1, OBREBSKI, Mathias and PORRITT, Robert1, (1)University of California, Berkeley, Berkeley, CA 94720, (2)Geology Department, Miami University, 114 Shideler Hall, Oxford, OH 45056, rallen@berkeley.edu, rallen@berkeley.edu
 
9:55 AM
Break
8
10:10 AM
CASCADE ARC AND WALKER LANE INTERACTION IN THE LASSEN VOLCANIC REGION, CALIFORNIA
MUFFLER, L.J. Patrick1, BLAKELY, Richard J.2 and CLYNNE, Michael A.1, (1)US Geological Survey, 345 Middlefield Rd, MS 910, Menlo Park, CA 94025, (2)US Geological Survey, 345 Middlefield Rd, MS 989, Menlo Park, CA 94025, pmuffler@usgs.gov, pmuffler@usgs.gov
9
10:25 AM
ERUPTIVE HISTORY OF SOUTH SISTER, OREGON CASCADES
FIERSTEIN, Judy1, HILDRETH, Wes1 and CALVERT, Andrew T.2, (1)U. S. Geological Survey, 345 Middlefield Road, MS-910, Menlo Park, CA 94025, (2)US Geological Survey, 345 Middlefield Rd, MS-937, Menlo Park, CA 94025, jfierstn@usgs.gov, jfierstn@usgs.gov
10
10:45 AM
CONSTRAINING VOLCANIC INFLATION AT THREE SISTERS VOLCANIC FIELD THROUGH MICROGRAVITY AND DEFORMATION MODELING
ZUREK, Jeffrey Mark, Earth sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada, WILLIAMS-JONES, Glyn, Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A1S6, Canada, DZURISIN, Daniel, U.S. Geological Survey David. A. Johnston Cascades Volcano Observatory, David. A. Johnston Cascades Volcano Observatory 1300 S.E. Cardinal Court, Building 10, Suite 100, Vancouver, WA 98683-9589, JOHNSON, Dan, Geology, University of Puget Sound, Tacoma, WA and EGGERS, Albert, Geology, University of Puget Sound, Tacoma, WA 98416-1048, jmz3@sfu.ca, jmz3@sfu.ca
11
11:00 AM
U-SERIES CRYSTAL AGES FROM THE ROCK MESA ERUPTION AT SOUTH SISTER VOLCANO, OREGON SUGGEST COMPLEX ORIGIN FOR RHYOLITE
STELTEN, Mark, Department of Geological Sciences, University of California - Davis, One Shields Avenue, Davis, CA 95616, COOPER, Kari M., Geology, UC Davis, 1 Shields Ave, Davis, CA 95616 and KLEMETTI, Erik W., Geosciences, Denison University, 100 W. College St, Granville, OH 43023, mestelten@ucdavis.edu, mestelten@ucdavis.edu
12
11:15 AM
EVIDENCE FOR RECENT H2O-RICH VIOLENT STROMBOLIAN ERUPTIONS IN THE CENTRAL OREGON HIGH CASCADES AT COLLIER, FOUR-IN-ONE, AND YAPOAH CONES
RUSCITTO, Daniel1, MCKAY, Daniele1, WALLACE, Paul1, DEARDORFF, Nick2 and CASHMAN, Katharine2, (1)Department of Geological Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403, (2)Department of Geological Sciences, University of Oregon, Eugene, OR 97403, druscitt@uoregon.edu, druscitt@uoregon.edu
13
11:30 AM
VOLATILE (H2O, CO2, S, CL) CONCENTRATIONS AND THE LOW EXPLOSIVITY OF CALC-ALKALINE ANDESITES FROM MOUNT HOOD VOLCANO, OREGON
KOLESZAR, Alison M., Dept of Geosciences, Oregon State University, 104 Wilkinson Hall, Corvallis, OR 97331, KENT, Adam J.R., College of Earth, Ocean & Atmospheric Sciences, Oregon State University, 104 Ocean Admin, Corvallis, OR 97331, SCOTT, William E., U.S. Geological Survey, 1300 SE Cardinal Court, Vancouver, WA 98683, WALLACE, Paul, Department of Geological Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403, COOPER, Kari M., Geology, UC Davis, 1 Shields Ave, Davis, CA 95616 and EPPICH, Gary R., Department of Geology, University of California - Davis, 1 Shields Ave, Davis, CA 95616, alison.koleszar@geo.oregonstate.edu, alison.koleszar@geo.oregonstate.edu
14
11:45 AM
MAGMA STORAGE TIMESCALES OF RECENTLY-ERUPTED MAGMAS AT MT HOOD VOLCANO, OREGON
EPPICH, Gary R., Department of Geology, University of California-Davis, 1 Shields Ave, Davis, CA 95616, COOPER, Kari M., Geology, UC Davis, 1 Shields Ave, Davis, CA 95616, KENT, Adam J.R., College of Earth, Ocean & Atmospheric Sciences, Oregon State University, 104 Ocean Admin, Corvallis, OR 97331 and KOLESZAR, Alison M., Dept of Geosciences, Oregon State University, 104 Wilkinson Hall, Corvallis, OR 97331, greppich@ucdavis.edu, greppich@ucdavis.edu
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