Session: Mechanisms of Arc Magma Generation along the Cordillera (Cordilleran Section

Paper #

Start Time

1

08:30

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, 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, smstraub@ldeo.columbia.edu, smstraub@ldeo.columbia.edu

2

08:50

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, (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, rms@geofisica.unam.mx, rms@geofisica.unam.mx

3

09:10

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, (2)Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico, tuena@geociencias.unam.mx, tuena@geociencias.unam.mx

4

09:30

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, pschaaf@geofisica.unam.mx

5

09:50

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, AGOSTINI, Samuele, Institute of Geosciences and Earth Resources, Consiglio Nazionale delle Ricerche (CNR), 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, lmori@geologia.unam.mx, lmori@geologia.unam.mx

6

10:10

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, (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, ldelgado@cicese.mx, ldelgado@cicese.mx

10:30

Break

7

10:50

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 Boulder, 2200 Colorado Avenue, UCB 399, Boulder, CO 80309-0399, Charles.Stern@Colorado.EDU, Charles.Stern@Colorado.EDU

8

11:20

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, adchapman@email.arizona.edu

9

11:40

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, (2)Geological Sciences, University of North Carolina, Chapel Hill, NC 27599-3315, (3)Geoscience, Western Nevada College, Carson City, NV 89703, (4)Geological Sciences, University of Nevada, Reno, Reno, NV 89557, farmer@colorado.edu, farmer@colorado.edu

10

12:00

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.³, GUALDA, Guilherme A.R.³, CLYNNE, Michael A.⁴ and FLANAGAN, Daniel M.³, (1)Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (2)Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, (3)Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, (4)Volcano Science Team, USGS, Menlo Park, CA 94025, lily.claiborne@vanderbilt.edu, lily.claiborne@vanderbilt.edu

11

12:20

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, 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, cal.barnes@ttu.edu, cal.barnes@ttu.edu

12:40

10 minutes discussion at the end of the second block of oral talks

Cordilleran Section - 108th Annual Meeting (29–31 March 2012)

T5. Mechanisms of Arc Magma Generation along the Cordillera