Cordilleran Section - 108th Annual Meeting (29–31 March 2012)
Session No. 35 Saturday, 31 March 2012
08:30-12:50, Hotel Misión Juriquilla: Juarez 3

T5. Mechanisms of Arc Magma Generation along the Cordillera

Laura Mori, Peter Schaaf and Arturo Gómez-Tuena, Presiding
 Paper #Start Time
35-108:30 NI-CO SYSTEMATICS OF HIGH-NI OLIVINES IN THE CENTRAL MEXICAN VOLCANIC BELT: CONSTRAINTS FOR PYROXENITE FORMATION IN THE MANTLE WEDGE: STRAUB, Susanne M., Geochemistry Division, Lamont Doherty Earth Observatory, 61 Route 9W, Palisades, NY 10964, smstraub@ldeo.columbia.edu, GÓMEZ-TUENA, Arturo, Centro de Geociencias, Universidad Nacional Autónoma de México, Blvd Juriquilla 3001, Juriquilla, Querétaro, 76230, Mexico, and ZELLMER, Georg F., Institute for Earth Sciences, Academia Sinica, 128 Academia Road, Sec. 2, Nankang, Taipei, 11529, Taiwan
35-208:50 MAGMATIC EVOLUTION IN THE APAN-TLÁLOC REGION, EASTERN SECTOR OF THE TRANS-MEXICAN VOLCANIC BELT: SR, ND AND PB ISOTOPIC AND GEOCHEMICAL EVIDENCES: MARTÍNEZ-SERRANO, Raymundo G.1, GARCÍA-TOVAR, Gloria P.2, NÚÑEZ-CASTILLO, Elizabeth Y.1, CORREA-TELLO, Juan Carlos3, and SOLÍS-PICHARDO, Gabriela4, (1) Instituto de Geofisica, Universidad Nacional Autónoma de México, Circuito Institutos s/n, Ciudad Universitaria, México D.F, 04510, Mexico, rms@geofisica.unam.mx, (2) Ciencias de la Tierra, Universidad Nacional Autónoma de México, Circuito Institutos s/n, Ciudad Universitaria, México D.F, 04510, Mexico, (3) Posgrado en Ciencias de la Tierra, Universidad Nacional Autónoma de México, Circuito Institutos s/n, Ciudad Universitaria, México D.F, 04510, (4) Instituto de Geología, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico
35-309:10 ANDESITIC VOLCANISM IN WESTERN MEXICO BY MELTING OF AMPHIBOLITIC MANTLE WEDGE PLUMES: GÓMEZ-TUENA, Arturo1, VÁZQUEZ-DUARTE, Alma1, DÍAZ-BRAVO, Beatriz1, PÉREZ-ARVIZU, Ofelia1, and MORI, Laura2, (1) Centro de Geociencias, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Juriquilla, 76230, Mexico, tuena@geociencias.unam.mx, (2) Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
35-409:30 IDENTIFYING SUBDUCTION COMPONENTS IN THE TRANS MEXICAN VOLCANIC BELT: A COMPLEX MAGMATIC ARC IN A COMPLEX SUBDUCTION ZONE REGIME: SCHAAF, Peter, Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F 04510 Mexico, pschaaf@geofisica.unam.mx
35-509:50 GEOCHEMICAL RECYCLING AND MAGMA GENERATION IN THE EASTERN TRANS-MEXICAN VOLCANIC BELT: THE CASE STUDY OF THE SERDÁN-ORIENTAL BASIN: MORI, Laura, Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico, lmori@geologia.unam.mx, AGOSTINI, Samuele, Institute of Geosciences and Earth Resources, CNR - Italian National Research Council, Via G. Moruzzi, 1, Pisa, 56124, Italy, RAMOS-ARIAS, Mario, Geología Regional, Instituto de Geología, UNAM, Ciudad Universitaria, Coyoacan, México D.F, Mexico, 04510, and GÓMEZ-TUENA, Arturo, Centro de Geociencias, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Juriquilla, 76230, Mexico
35-610:10 PETROLOGIC FEATURES AND TECTONIC CONTEXT OF DISCRETE PLUTONS IN THE SOUTHWESTERN MARGIN OF THE PENINSULAR RANGES BATHOLITH, MEXICO: DELGADO-ARGOTE, Luis Alberto1, AVILEZ-SERRANO, Porfirio2, TORRES-CARRILLO, Xochitl G.3, PEÑA-ALONSO, Tomás3, and WEBER, Bodo4, (1) Departmento de Geología, CICESE, km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California, 22860, Mexico, ldelgado@cicese.mx, (2) Geologia, CICESE, Km 107 Carr. Tijuana-Ensenada 3918, Ensenada, B.C, 22860, Mexico, (3) Departmento de Geología, CICESE, km 107 Carretera Tijuana-Ensenada, Ensenada, B.C, 22860, Mexico, (4) Departamento de Geología, CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Palyitas, Ensenada, B.C, 22860, Mexico
 10:30 Break
35-710:50 KEYNOTE: THE ROLE OF SUBDUCTION EROSION IN PRODUCING TEMPORAL AND SPATIAL VARIATIONS IN ANDEAN MAGMA CHEMISTRY: STERN, Charles R., Department of Geological Sciences, University of Colorado, UCB 399, Boulder, CO 80309-0399, Charles.Stern@Colorado.EDU
35-811:20 LITHOSPHERIC RAINDROPS BENEATH THE PERUVIAN ALTIPLANO: EVIDENCE FROM BACK ARC POTASSIC MAFIC VOLCANIC ROCKS: CHAPMAN, Alan D. and DUCEA, Mihai N., Department of Geosciences, University of Arizona, 1040 E 4th St, Tucson, AZ 85721, adchapman@email.arizona.edu
35-911:40 MANTLE LITHOSPHERE AS SINK AND SOURCE OF CONTINENTAL ARC AND POST-ARC MAGMATISM: FARMER, G. Lang1, GLAZNER, Allen F.2, KORTEMEIER, Winifred T.3, SCHWEICKERT, Richard A.4, and MOORE, Jessica2, (1) Dept. of Geological Sciences and CIRES, Univ. of Colorado, Campus Box 399, Boulder, CO 80309-0399, farmer@colorado.edu, (2) Geological Sciences, University of North Carolina, Chapel Hill, NC 27599-3315, (3) Department of Geological Sciences, University of Nevada, Reno, Reno, NV 89557, (4) Geological Sciences, University of Nevada, Reno, Reno, NV 89557
35-1012:00 UNDERSTANDING THE MOUNT ST. HELENS MAGMATIC SYSTEM USING ZIRCON SURFACE GEOCHRONOLOGY AND GEOCHEMISTRY, 3D X-RAY TOMOGRAPHY, AND GLASS COMPOSITIONS: CLAIBORNE, Lily L.1, WOODEN, Joseph L.2, MILLER, Calvin F.1, GUALDA, Guilherme A.R.1, CLYNNE, Michael A.3, and FLANAGAN, Daniel M.1, (1) Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, lily.e.lowery@vanderbilt.edu, (2) Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, (3) Volcano Science Team, USGS, Menlo Park, CA 94025
35-1112:20 MAGMA MIXING AND GARNET FORMATION IN THE MIDDLE CRUST AS AN ANALOG FOR DEEP-CRUSTAL MAGMA MIXING IN CONTINENTAL ARCS: BARNES, Calvin G., Department of Geosciences, Texas Tech University, Box 41053, Lubbock, TX 79409-1053, Cal.Barnes@ttu.edu, FROST, Carol D., Department of Geology and Geophysics, University of Wyoming, Dept. 3006, 1000 University Avenue, Laramie, WY 82071, NORDGULEN, Oystein, Norwegian Geol Survey, Trondheim, N-7491, Norway, and PRESTVIK, Tore, University of Trondheim, Dept. of Geology and Mineral Resources Engineering, Trondheim, NO-7491, Norway
 12:40 10 minutes discussion at the end of the second block of oral talks

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