Session: Tectonic Controls on Volcanism: Geologic Perspectives (Posters) (2010 GSA Denver Annual Meeting (31 October

T61. Tectonic Controls on Volcanism: Geologic Perspectives (Posters)

GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; GSA Structural Geology and Tectonics Division; GSA Geophysics Division; Mineralogical Society of America

Authors will be present from 9 to 11 AM, and 4:30 to 5:30 PM.

Paper #

Booth #

328

STRUCTURAL CONTROL OF VOLCANIC ACTIVITY IN THE NORTHEAST AREA OF THE NEVADO DEL RUIZ VOLCANO, COLOMBIA

MEJIA, Eliana L., Geological Sciences, Universidad Nacional de Colombia, Bogotá, Colombia and ZULUAGA, Carlos A., Geosciences, Universidad Nacional de Colombia, Edif manuel Ancizar, ofic. 301, Ciudad Universitaria, Bogotá, Colombia, elmejiat@unal.edu.co, elmejiat@unal.edu.co

329

EVALUATING UNROOFING AND LINKS WITH VOLCANISM IN AN ELEVATED AND ERODED ARC, CORDILLERA DE TALAMANCA, COSTA RICA: CONSTRAINTS FROM PRELIMINARY (U-TH)/HE THERMOCHRONOMETRY

NELL, Ryan M.¹, METCALF, James R.², GAZEL, Esteban³, CARR, Michael⁴, RUIZ, Pablo⁵, ULLOA, Andrés⁶ and DELGADO, Christian⁶, (1)Department of Geological Sciences, University of Colorado at Boulder, 2200 Colorado Ave, Boulder, CO 80309, (2)Department of Geological Sciences, University of Colorado Boulder, Boulder, CO 80309, (3)Lamont-Doherty Earth Observatory, Columbia University, 61 Rt. 9W, Palisades, NY 10964, (4)Department of Earth & Planetary Sciences, Rutgers University, 610 Taylor Rd, Piscataway, NJ 08854, (5)Department of Earth & Planetary Sciences, Rutgers University, 610 Taylor Rd, Piscataway, NJ 08854-066, (6)Escuela Centroamericana de Geología, Universidad de Costa Rica, Apdo, UCR San José, 214-2060, Costa Rica, Ryan.Nell@Colorado.EDU, Ryan.Nell@Colorado.EDU

330

TEARING APART OF AN EARLY MIOCENE SILICIC IGNEOUS PROVINCE IN THE SOUTHERN GULF OF CALIFORNIA

OROZCO-ESQUIVEL, Teresa¹, LÓPEZ-MARTÍNEZ, Margarita², LONSDALE, Peter³, FERRARI, Luca¹, CORNEJO-JIMENEZ, Candy¹, PINERO-LAJAS, Doris⁴ and DUQUE-TRUJILLO, Jose F.¹, (1)Centro de Geociencias, Universidad Nacional Autonoma de Mexico, Blvd Juriquilla 3001, Juriquilla, Queretaro, 76230, Mexico, (2)Geology Department, Earth Sciences Division, CICESE, Km. 107 carr. Tijuana-Ensenada, Ensenada, B.C, 22860, Mexico, (3)Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA 92093, (4)Geology Department, Earth Sciences Division, CICESE, Km. 107 carr. Tijuana-Ensenada, Juriquilla, Ensenada, B.C, 22860, Mexico, torozco@geociencias.unam.mx, torozco@geociencias.unam.mx

331

KINEMATIC ANALYSIS OF LATE PLEISTOCENE FAULTING IN THE BIMODAL BLACKFOOT LAVA FIELD, IDAHO, USA: EVIDENCE OF DIKE-INDUCED FAULTING?

POLUN, Sean G.¹, RODGERS, David W.¹ and MCCURRY, Michael², (1)Department of Geosciences, Idaho State University, 921 South 8th Ave., Box 8072, Pocatello, ID 83209, (2)Department of Geosciences, Idaho State University, Pocatello, ID 83209, polusean@isu.edu, polusean@isu.edu

332

THE BRECCIA OF FROG LAKES: RECONSTRUCTING TRIASSIC VOLCANISM IN THE EAST-CENTRAL SIERRA NEVADA, CALIFORNIA

DOUGLAS, Sarah R., Earth Sciences, Indiana University-Purdue University Indianapolis, 723 West Michigan Street, Indianapolis, IN 46202, RIGGS, N.R., School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011-4099, BARTH, Andrew P., Earth Sciences, Indiana University-Purdue University, 723 West Michigan Street, Indianapolis, IN 46202 and WALKER, J. Douglas, Geology, University of Kansas, 1475 Jayhawk Blvd, 120 Lindley Hall, Lawrence, KS 66045, srdougla@umail.iu.edu, srdougla@umail.iu.edu

333

PROVENANCE INTERPRETATIONS COMBINING PETROGRAPHY AND ZIRCON U-PB AGES OF SANDSTONES IN CONTINENTAL RED BEDS AT VALLE DE HUIZACHAL, TAMAULIPAS, NE MEXICO: RECORD OF EARLY-MIDDLE JURASSIC ARC VOLCANISM AND TRANSITION TO CRUSTAL EXTENSION

RUBIO-CISNEROS, Igor Ishi, Facultad de Ciencias de la Tierra, Universidad Autónoma de Nuevo León, México, Hacienda de Guadalupe, Carretera a Cerro Prieto Km.8, Linares, 64700, Mexico and LAWTON, Timothy F., Department of Geological Sciences/MSC 3AB, New Mexico State University, P.O. Box 30001, Las Cruces, NM 88003, igor_rubio@yahoo.com, igor_rubio@yahoo.com

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