GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 47
Sunday, 22 October 2017: 1:30 PM-5:30 PM
Skagit 2 (The Conference Center)

T153. Geochemical and Petrologic Forensics in the study of Earth’s Magmatism: A Tribute to the Distinguished Career of Jon Davidson (1959–2016)

GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division
Shanaka de Silva, James Beard, Marjorie Wilson, Valbone Memeti and John A. Wolff, Advocates
 
1:30 PM
Introductory Remarks
1:45 PM
GEOCHEMISTRY OF LAVAS FROM SUMACO VOLCANO; A STEP TOWARD RESOLVING THE SLAB-MELTING DEBATE IN ECUADOR (Invited Presentation)
GARRISON, Jennifer M.1, SIMS, Kenneth W.W.2, YOGODZINSKI, Gene3, HALL, Minard L.4, MOTHES, Patricia A.4 and SANDIFORD, Mike5, (1)Department of Geosciences and Environment, CSU Los Angeles, 5151 State University Dr, Los Angeles, CA 90032, (2)Geology and Geophysics, University of Wyoming, Laramie, WY 82071, (3)Department of Earth & Ocean Sciences, University of South Carolina, Columbia, SC 29208, (4)Instituto Geofísico, Escuela Politécnica Nacional, Quito, 1701-2759, Ecuador, (5)University of Melbourne, Melbourne, 3010, Australia, jgarris@calstatela.edu
2:05 PM
THE NEAR-UBIQUITY OF OPEN-SYSTEM MAGMATIC PROCESSES (Invited Presentation)
DUNGAN, Michael A., Department of Earth Sciences, University of Oregon, Cascade Hall, Eugene, OR 97402, dunganate@gmail.com
2:25 PM
THE DEVELOPMENT OF COMPONENTRY ISOTOPIC MICROSAMPLING: THE DAVIDSON YEARS (Invited Presentation)
TEPLEY III, Frank, College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, Corvallis, OR 97331-5503, ftepley@coas.oregonstate.edu
2:45 PM
A MODEL FOR THE HIGH-TEMPERATURE ORIGIN AND PARADOXICAL DISTRIBUTION OF PEGMATITES IN MAFIC PLUTONS, SMARTVILLE COMPLEX, CALIFORNIA
BEARD, James S., Virginia Museum of Natural History, Martinsville, VA and SCOTT, Sean Ross, Geology and Geophysics, University of Wyoming, 1000 E University Ave, Laramie, WY 82072, jim.beard@vmnh.virginia.gov
3:00 PM
TRACKING STAGES OF MAGMATIC EVOLUTION BY COMPARISON OF TRACE ELEMENTS AND ISOTOPES IN DIFFERENT MINERAL POPULATIONS IN THE TUOLUMNE INTRUSIVE COMPLEX
MEMETI, Vali1, OPPENHEIM, Louis1, WERTS, Kevin2, WILLIAMS, Dustin1, BARNES, Calvin G.2, PATERSON, Scott R.3 and BARNES, Melanie A.2, (1)Department of Geological Sciences, California State University Fullerton, 800 N State College Blvd, Fullerton, CA 92831, (2)Department of Geosciences, Texas Tech University, Lubbock, TX 79409-1053, (3)Department of Earth Sciences, University of Southern California, 3651 Trousdale Parkway, Los Angeles, CA 90089-0740, vmemeti@fullerton.edu
 
3:15 PM
Jon Davidson GSA citation
 
3:45 PM
Break
4:00 PM
URANIUM-SERIES DATING OF ZIRCONS FROM MULTIPLE ERUPTIONS OF THE CHANGBAI VOLCANO, CHINA/NORTH KOREA BORDER
ZOU, Haibo, Department of Geosciences, Auburn University, Auburn, AL 36849, FAN, Qi-Cheng, Institute of Geology, Chinese Earthquake Administration, Beijing, 100029, China, ZHANG, Hongfu, State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China and SCHMITT, Axel K., Earth and Space Sciences, University of California, Los Angeles, CA 90095, haibo.zou@auburn.edu
4:15 PM
EXCESS VOLATILES AT COPAHUE VOLCANO, ARGENTINA
VAREKAMP, Johan C. and CAMFIELD, Lauren M., Dept. of Earth & Environmental Sciences, Wesleyan University, 265 Church Street, Middletown, CT 06459, jvarekamp@wesleyan.edu
4:30 PM
COMPLEX MAGMA MIXING IN THE LOWER CRUST RECORDED BY MAJOR AND TRACE ELEMENT ZONING IN HIGH-PRESSURE AMPHIBOLE: KLAMATH MOUNTAIN PROVINCE, NORTHERN CALIFORNIA
BARNES, Calvin G., Dept. of Geosciences, Texas Tech University, Lubbock, TX 79409-1053, WERTS, Kevin, Department of Geosciences, Texas Tech University, Department of Geosciences, Texas Tech University, Lubbock, TX 79409 and BARNES, Melanie A., Department of Geosciences, Texas Tech University, Lubbock, TX 79409, cal.barnes@ttu.edu
 
4:45 PM
Tom Shea citation
4:55 PM
THE MEANING OF CHEMICAL ZONING IN OLIVINE: PERSPECTIVES FROM CRYSTALLIZATION EXPERIMENTS
SHEA, Thomas, Geology & Geophysics, University of Hawaii at Manoa, 1680 East-west rd. POST 614B, Honolulu, HI 96822, tshea@hawaii.edu
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