Session: T5. Processes, Comparisons and Other Cordilleran Issues I: Seismicity, General Tectonic Processes, and Specific Examples (Backbone of the Americas

Paper #

Booth #

1

87

FORE-ARC DEFORMATION IN RESPONSE TO SLAB-PULL AND UPPER PLATE CONVERGENCE: NUMERICAL MODELS

GERBAULT Sr, Muriel, Geology, I.R.D, University of Chile, Plaza Ercilla #803, Santiago, 13518, Chile, gerbault@lmtg.obs-mip.fr, gerbault@lmtg.obs-mip.fr

2

88

IS MUCH OF WHERE GIANT TRENCH EARTHQUAKES OCCUR SIMPLY A SAMPLING BIAS?

SWAFFORD, Laura¹, STEIN, Seth¹ and OKAL, Emile A.², (1)Department of Geological Science, Northwestern University, 1850 Campus Drive, Evanston, IL 60208-2150, (2)Geology, Northwestern Univ, Evanston, IL 60202, swafford@earth.northwestern.edu, swafford@earth.northwestern.edu

3

89

A COMPOSITE VIEW OF MAGMA ORGANIZATION AND EMPLACEMENT MECHANISMS FROM THE UPPER CRUST OF ARGENTINA AND THE MIDDLE CRUST OF NORWAY

ANDERSON, Heather S.¹, YOSHINOBU, Aaron S.² and MARKO, Wayne T.², (1)Geosciences, Texas Tech University, Dept. of Geosciences, Texas Tech University, Lubbock, TX 79409, (2)Dept. of Geosciences, Texas Tech Univ, Lubbock, TX 79409-1053, hs.anderson@ttu.edu, hs.anderson@ttu.edu

4

90

DO STRATIGRAPHIC SEQUENCES IN FORELAND BASIN DEPOSITS IMPLY MOUNTAIN BUILDING EPISODES?

RAYNOLDS, Robert G.¹, DECHESNE, Marieke¹ and KILLEEN, Timothy J.², (1)Denver Museum of Nature & Science, 2001 Colorado Boulevard, Denver, CO 80205-5798, (2)Museo Noel Kempff Mercado, Santa Cruz, Bolivia, denverbasin@dmns.org, denverbasin@dmns.org

5

91

CONTINENTAL BASIN DEVELOPMENT IN A SUBDUCTION SETTING, NE SOUTH ISLAND, NEW ZEALAND

SEN, Pragnyadipta¹, HUBBARD, Mary¹, PETTINGA, Jarg² and OVIATT, Jack¹, (1)Geology, Kansas State University, 108 Thompson Hall, Department of Geology, Kansas State University, Manhattan, KS 66506, (2)Department of Geological Sciences, Univ of Canterbury, Private Bag 4800, Christchurch, New Zealand, psen@ksu.edu, psen@ksu.edu

6

92

SPATIAL VARIATION OF SEISMIC B-VALUES BENEATH MAKUSHIN VOLCANO, UNALASKA ISLAND, ALASKA

BRIDGES, David L. and GAO, Stephen S., Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, dbridges@ksu.edu, dbridges@ksu.edu

7

93

THE 2002 DENALI EARTHQUAKE: INSIGHT INTO SLIP-PARTITIONING AND GROWTH OF THE ALASKA RANGE

TAYLOR, Michael¹, LEPRINCE, Sebastien² and AVOUAC, Jean-Philippe², (1)Department of Geology, University of Kansas, 1475 Jayhawk Blvd, Lawrence, KS 66045, (2)Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125, mht@ku.edu, mht@ku.edu

8

94

NEW CONTRAINTS ON THE TECTONICS OF THE OCEAN BASIN INBOARD OF THE WRANGELLIA COMPOSITE TERRANE, SOUTH-CENTRAL ALASKA

BIER, Sara¹, GILMAN, Tony² and FISHER, Donald², (1)Geology Department, Washington and Lee University, Science Addition, Lexington, VA 24450, (2)Department of Geosciences, The Pennsylvania State University, Deike Building, University Park, PA 16802, biers@wlu.edu, biers@wlu.edu

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95

STRUCTURAL VARIATIONS IN CORDILLERAN LITHOSPHERE FROM DEEP SEISMIC REFLECTION PROFILING

BROWN, Larry D., INSTOC, Cornell Univ, Department of Earth and Atmospheric Sciences, Snee Hall, Cornell University, Ithaca, NY 14853, brown@geology.cornell.edu, brown@geology.cornell.edu

10

96

MAGMATIC INCLUSIONS IN THE MT. HELEN DOME, LASSEN VOLCANIC CENTER, SOUTHERNMOST CASCADES: CONSTRAINTS ON UPPER-CRUSTAL MAGMATIC AND ERUPTIVE PROCESSES

WILSON, Luke F., FEELEY, Todd C. and UNDERWOOD, Sandra, Department of Earth Sciences, Montana State University, Bozeman, MT 59717, wluke21@yahoo.com, wluke21@yahoo.com

11

97

THE TRUNCATION OF WESTERN NORTH AMERICA AND ITS CORRELATION TO ACTIVE, LARGE-SCALE, STRIKE-SLIP FAULTS: NEW OBSERVATIONS FROM THE KENNEDY MEADOWS PENDANT, KERN COUNTY, CALIFORNIA

BENNETT, Scott EK., Department of Geological Sciences, California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330-8266, earthman3@gmail.com, earthman3@gmail.com

12

98

RECEIVER FUNCTION INVESTIGATION OF THE UPPER MANTLE TRANSITION ZONE BENEATH NORTHERN CALIFORNIA

BROWN, Shanna M., Geosciences, Texas Tech University, Box 41053, Dept Geoscience, Texas Tech, Lubbock, TX 79409 and GURROLA, Harold, Geosciences, Texas Tech, Lubbock, TX 79409, shanna.m.brown@ttu.edu, shanna.m.brown@ttu.edu

13

99

100TH ANNIVERSARY OF THE 1906 SAN FRANCISCO EARTHQUAKE AS A FORUM FOR EDUCATING THE PUBLIC

IVERSEN, Eve Helene, 1953 22nd St, San Pablo, CA 94806, eveiversen@yahoo.com, eveiversen@yahoo.com

14

100

FUTURE EARTHQUAKE PROBABILITY, HAZARD EXTENT, AND RISK ASSESMENT OF THE SAN FRANCISCO BAY REGION OF CALIFORNIA

EDELEN, Jeffrey Charles, Geological Sciences, University of Idaho, 1600 Harris Ct, Helena, MT 59601, jcedelen@gmail.com, jcedelen@gmail.com

15

101

TECTONIC EVOLUTION OF THE PACIFIC MARGIN AND THEIR INFLUENCE IN THE STRATIGRAPHY AND PALEOGEOGRAPHY OF EARLY MESOZOIC UNITS IN CENTRAL TO NORTHEASTERN MEXICO

BARBOZA GUDINO Sr, Jose Rafael¹, BARAJAS NIGOCHE, Luis Daniel², ZAVALA MONSIVAIS, Aurora² and VENEGAS RODRIGUEZ, Gastón³, (1)Instituto de Geologia, Universidad Autonoma de San Luis Potosi, Manuel Nava No. 5, San Luis Potosi, 78240, Mexico, (2)Posgrado en geología aplicada, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78240, Mexico, (3)Posgrado en geología aplicada, Fac. Ingeniería / I. de Geología, UASLP, Manuel Nava 5, Zona Universitaria, San Luis Potosí, San Luis Potosí, 78240, rbarboza@uaslp.mx, rbarboza@uaslp.mx

16

102

EVIDENCE OF CO-MAGMATIC DEFORMATION IN THE CRETACEOUS ARC-RELATED SUCCESSIONS OF THE ZIHUATANEJO TERRANE, WESTERN PORTION OF THE GUERRERO COMPOSITE TERRANE, MEXICO: PRELIMINARY RESULTS

HERNÁNDEZ ORDÓÑEZ, Rodrigo¹, CENTENO GARCÍA, Elena¹, BUSBY, Cathy² and BUSBY, Michael³, (1)Instituto de Geología, Universidad Nacional Autónoma de México, Avenida Universidad # 3000, Ciudad Universitaria, México, 04510, Mexico, (2)Department of Geological Sciences, University of California, Santa Barbara, CA 93106-9630, Santa Barbara, CA 93106, (3)Santa Barbara Institute for Crustal Studies, University of California, 1140 Civvetz Hall Santa Barbara, CA, Santa Barbara, CA 93106, roheor13@servidor.unam.mx, roheor13@servidor.unam.mx

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103

LATE CRETACEOUS NON-MARINE SEDIMENTATION IN THE CUTZAMALA BASIN, CENTRAL GUERRERO COMPOSITE TERRANE OF WESTERN MEXICO: TECTONIC IMPLICATIONS

CALLEJAS, Judith¹, ALTAMIRA, Armando², CENTENO, Elena³, HERNÁNDEZ, Enrique¹ and TALAVERA, Oscar⁴, (1)Instituto de Geología, Universidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad Universitaria, México, 04510, Mexico, (2)Department of Geosciences, University of Houston, Houston-SR1, 4800 Calhoun Road, Houston, TX 77204-5503, (3)Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Del. Coyoacán, México, 04510, Mexico, (4)Escuela Regional de Ciencias de la Tierra, Universidad Autónoma de Guerrero, Taxco el Viejo Guerrero, Taxco, Mexico, judith_cm@yahoo.com, judith_cm@yahoo.com

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104

GEOCHEMICAL CHARACTERISATION OF CHICXULUB-IMPACTEJECTA - NEW CONSTRAINS FROM THE GULF OF MEXICO AND THE CARIBBEAN

HARTING, Markus, Faculty of Geosciences, Department of Earthsciences, Budapestlaan, P.O. Box 80021, Utrecht, 3508 TA, Netherlands, m.harting@geo.uu.nl, m.harting@geo.uu.nl

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105

GEOCHEMICAL HISTORY AND MAGMATIC PROCESSES OF THE TELICA VOLCANIC COMPLEX, NICARAGUAN VOLCANIC FRONT

OLNEY, Jessica L.¹, WALKER, James A.¹, PATINO, Lina C.² and CARR, Michael J.³, (1)Geology and Environmental Geosciences, Northern Illinois University, 312 Davis Hall, DeKalb, IL 60115, (2)Earth Sciences Research, National Science Foundation, 4201 Wilson Blvd, Room 785S, Arlington, VA 22230, (3)Geological Sciences, Rutgers University, Piscataway, NJ 08854, yesik30@yahoo.com, yesik30@yahoo.com

20

106

LINKING AMERICAS BACKBONE: GEOLOGICAL DEVELOPMENT AND BASEMENT ROCKS OF CENTRAL PANAMA

WÖRNER, Gerhard, Geochemie, Goettingen University, Goldschmidtstr. 1, Goettingen, 37077, HARMON, Russel S., Army Research Office, PO Box 12211, Research Triangle Park, Research Triangle Park, NC 27709, WEGNER, Wencke, Abt. Geochemie, GZG Universität Göttingen, Goldschmidtstr. 1, Göttingen, 37077, Germany and SINGER, Bradley, Geology and Geophysics, U. of Wisconsin - Madison, 1215 W. Dayton St, Madison, WI 53706-1692, gwoerner@gwdg.de, gwoerner@gwdg.de

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107

BOLIVAR & GEODINOS: INVESTIGATING ISLAND ARC ACCRETION ALONG THE SOUTHEASTERN CARIBBEAN PLATE BOUNDARY

LEVANDER, Alan, Department of Earth Science, Rice University, 6100 Main St, MS 126, Houston, TX 77005, SCHMITZ, Michael, FUNVISIS, Final Calle Mara, Urb. El Llanito, Caracas 1070, 76880, Venezuela and BOLIVAR & GEODINOS WORKING GROUPS, US and Venezuela, Houston and Caracas, 00000, alan@rice.edu, alan@rice.edu

22

108

CRUSTAL STRUCTURE ACROSS THE CARIBBEAN SOUTH AMERICA PLATE BOUNDARY AT 70°W: RESULTS OF THE BOLIVAR PROJECT

GUEDEZ, Maria C., ZELT, Colin A., MAGNANI, M. Beatrice and LEVANDER, Alan, Department of Earth Science, Rice University, 6100 Main St, MS 126, Houston, TX 77005, mcguedez@rice.edu, mcguedez@rice.edu

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109

SEISMIC STRUCTURE OF THE LEEWARD ANTILLES ARC AND GROWTH OF THE SOUTH AMERICAN CONTINENT

AROGUNMATI, Adeyemi¹, LEVANDER, Alan² and ZELT, Colin A.¹, (1)Earth Science Department, Rice University, 6100 Main Street, MS 126, Houston, TX 77005, (2)Department of Earth Science, Rice Univ, 6100 Main Street, MS 126, Houston, TX 77005, aadeyemi@rice.edu, aadeyemi@rice.edu

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110

SPREADING-SUBSIDENCE AND OCEANIC PLATEAU ACCRETION DURING THE CRETACEOUS EVOLUTION OF WESTERN COLOMBIA

NIVIA Sr, Álvaro, Geological Survey, Colombian Institute of Geology and Mining - INGEOMINAS, Carrera 98 No. 16 - 00, Cali, Colombia, anivia@ingeominas.gov.co, anivia@ingeominas.gov.co

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111

THE ROMERAL FAULTS, COLOMBIA: ANATOMY AND KINEMATICS OF A LATE MESOZOIC SUTURE

KAMMER, Andreas, Geocienicas, Universidad Nacional de Colombia, Cra 30 #45-02, Ed. Manuel Ancizar, Bogotá and VARGAS, Carlos Alberto, Geociencias, Universidad Nacional de Colombia, Cra 30 #45-02, Ed. Manuel Ancizar, Bogotá, Colombia, akammer@unal.edu.co, akammer@unal.edu.co

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112

GEOCHEMISTRY OF JURASSIC VOLCANIC ROCKS OF THE NORTHERN ANDES: INSIGHTS FOR THE MESOZOIC EVOLUTION OF THE NORTHWESTERN CORNER OF THE SOUTH AMERICAN PLATE

VÁSQUEZ, Mónica, Institut für Geowissenschaften, Universität Potsdam, Postfach 601553, Potsdam, D-14415, Germany, BAYONA, Germán, Corporación Geológica ARES, Calle 44A N. 53-96, Bogotá, Colombia, Colombia and ROMER, Rolf L., GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany, monica@geo.uni-potsdam.de, monica@geo.uni-potsdam.de

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113

MAGMA SOURCE DETERMINATION ON COLOMBIAN IGNEOUS ROCKS

VÁSQUEZ, Mónica¹, WILKE, Max¹, ALTENBERGER, Uwe¹, RICKERS, Karen² and FALKENBERG, Gerald², (1)Institut für Geowissenschaften, Universität Potsdam, Postfach 601553, Potsdam, D-14415, Germany, (2)HASYLAB/DESY, Notkestrasse 85, Hamburg, D-22607, monica@geo.uni-potsdam.de, monica@geo.uni-potsdam.de

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114

THE MIOCENE COLLISION OF THE PANAMA ARC WITH NORTHWESTERN SOUTH AMERICA: STRATIGRAPHIC EVIDENCE FROM THE BORBON BASIN, NORTHERN ECUADOR

DI CELMA, Claudio¹, CANTALAMESSA, Gino¹, RAGAINI, Luca², VALLERI, Gigliola³ and LANDINI, Walter², (1)Dipartimento di Scienze della Terra, Università di Camerino, Via Gentile III da Varano, Camerino, 62032, Italy, (2)Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria, Pisa, 56126, Italy, (3)Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, Firenze, 5512, Italy, claudio.dicelma@unicam.it, claudio.dicelma@unicam.it

29

115

MODE AND TIMING OF TERRANE ACCRETION IN THE FOREARC OF ECUADOR

VALLEJO, Cristian¹, LUZIEUX, Leonard¹, SPIKINGS, Richard², WINKLER, Wilfried¹ and HELLER, Friedrich³, (1)Geological Institute, ETH, Sonneggstrasse 5, Zürich, CH-8092, Switzerland, (2)Department of Mineralogy, Geneva University, Rue des Maraichers 13, Geneva, CH-1205, Switzerland, (3)ETH-Honggerberg, Inst Geophysik, Zurich, CH-8093, Switzerland, cristian.vallejo@erdw.ethz.ch, cristian.vallejo@erdw.ethz.ch

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116

QUATERNARY TECTONIC HISTORY OF THE GULF OF GUAYAQUIL-TUMBES BASIN AS THE SIGNATURE OF THE NORTH ANDEAN BLOCK TECTONIC ESCAPE

WITT, Cesar, UPMC-IRD-CNRS-UNSA- UMR 6526, Géosciences Azur and Escuela Politecnica Nacional, Departamento de Geologia, (Ecuador), B.P. 48 - Port de la Darse, Villefranche sur Mer, 06235, Ecuador, BOURGOIS, Jacques, Geosciences Azur, Institut pour la Recherche et le Développement, Escuela Politecnica Nacional, Quito, 17-01-2759, Ecuador and MICHAUD, François, UPMC-IRD-CNRS-UNSA- UMR 6526, Géosciences Azur and Escuela Politecnica Nacional, Departamento de Geologia, (Ecuador), B.P. 48 - Port de la Darse, Villefranche sur Mer, 06235, France, witt@geoazur.obs-vlfr.fr, witt@geoazur.obs-vlfr.fr

31

117

ASSESSMENT OF GEODYNAMIC CONTROLS ON CENOZOIC MINERALIZATIONS OF THE ANDEAN CORDILLERA BETWEEN 0°-40°S USING BRGMS GIS ANDES©

VAN DONGEN, Michiel, School of Geosciences, Monash University, Wellington Road, Clayton, VIC, 3800, Australia, michiel.vandongen@sci.monash.edu.au, michiel.vandongen@sci.monash.edu.au

32

118

THE NEOGENE STRATIGRAPHIC AND PALEOGEOGRAPHIC EVOLUTION OF THE MEJILLONES PENINSULA (NORTHERN CHILE) AND ITS RELATIONSHIP WITH LONG-TERM, SUBDUCTION-RELATED EXTENSIONAL TECTONICS

CANTALAMESSA, Gino¹, DI CELMA, Claudio¹, RAGAINI, Luca², VALLERI, Gigliola³ and LANDINI, Walter², (1)Dipartimento di Scienze della Terra, Università di Camerino, Via Gentile III da Varano, Camerino, 62032, Italy, (2)Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria, Pisa, 56126, Italy, (3)Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, Firenze, 5512, Italy, claudio.dicelma@unicam.it, claudio.dicelma@unicam.it

33

119

TIME CONSTRAINTS FOR MAGMATIC AND METAMORPHIC /HYDROTHERMAL PROCESSES DURING THE JURASSIC AND EARLY-CRETACEOUS IN THE COASTAL CODILLERA, NORTHERN CHILE

OLIVEROS, Verónica¹, FÉRAUD, Gilbert², AGUIRRE, Luis¹ and FORNARI, Michel², (1)Departamento de Geología, Universidad de Chile, Plaza Ercilla 803, Santiago, 8370450, Chile, (2)Géosciences Azur, Université de Nice, Parc Valrose, Nice, 06108, France, volivero@ing.uchile.cl, volivero@ing.uchile.cl

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120

EL ESPINO IRON-OXIDE COPPER GOLD DEPOSIT, COASTAL CORDILLERA OF NORTHERN CHILE

LOPEZ-ORREGO, Gloria, HITZMAN, Murray and NELSON, Eric, Colorado School of Mines, 1516 Illinois Street, Golden, CO 80401, gplopezo@mines.edu, gplopezo@mines.edu

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121

EVIDENCE OF MIDDLE TO LATE CRETACEOUS COMPRESSIVE DEFORMATION IN THE HIGH ANDES OF MENDOZA, ARGENTINA

ORTS, Sergio, Río Tinto Mining, Rivadavia 902, Godoy Cruz, Mendoza, 5501, Argentina and RAMOS, Victor A., Laboratorio de Tectónica Andina, FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, 1428, Argentina, Sergio.Orts@riotinto.com, Sergio.Orts@riotinto.com

36

122

KINEMATIC MODEL FOR BASEMENT-INVOLVED BACKTHRUSTING: EXAMPLES OF THE MALARGÜE FOLD AND THRUST BELT, CORDILLERA PRINCIPAL, MENDOZA, ARGENTINA

TURIENZO, Martín Miguel and DIMIERI, Luis V., Departamento de Geología, Universidad Nacional del Sur, San Juan 670, Bahía Blanca, 8000, Argentina, turienzo@uns.edu.ar, turienzo@uns.edu.ar

37

123

GEOLOGY OF THE BORBOLLÓN RIVER AREA IN THE NORTHERN MALARGÜE FOLD AND THRUST BELT, MAIN CORDILLERA, MENDOZA PROVINCE, ARGENTINA

MESCUA, José F., Laboratorio de Tectónica Andina, Departamento de Ciencias Geológicas, Universidad de Buenos Aires, Intendente Güiraldes 2160, Capital Federal, C1428EGA, Argentina, jfmescua@yahoo.com.ar, jfmescua@yahoo.com.ar

38

124

PLIO-PLEISTOCENE UPLIFT OF WESTERN CORDILLERA PRINCIPAL FROM SPATIAL AND TEMPORAL DISTRIBUTION OF LARGE ROCKSLIDES, SOUTHERN CENTRAL ANDES OF CHILE

ANTINAO, José Luis, Earth Sciences, Dalhousie University, 3006 LSC, Halifax, NS B3H4J1, Canada, jantinao@dal.ca, jantinao@dal.ca

39

125

COSMOGENIC EXPOSURE AGES OF LAVA FLOWS THAT TEMPORARILY DAMMED THE RIO GRANDE AND RIO SALADO, MENDOZA PROVINCE, ARGENTINA

MARCHETTI, David W., Department of Geology and Geophysics, University of Utah, 135 S 1460 E Room 719, Salt Lake City, UT 84112, CERLING, Thure E., Geology & Geophysics, University of Utah, 135 S. 1460 East Room 719, Salt Lake City, UT 84112, EVENSON, Edward B., Department of Earth and Environmental Sciences, Lehigh Univ, Bethlehem, PA 18015, GOSSE, John C., Department of Earth Sciences, Dalhousie University, Halifax, NS B3H 4R2, Canada and MARTINEZ, Oscar, Geology, Universidad Nacional de la Patagonia, Esquel, Argentina, dwmarche@mines.utah.edu, dwmarche@mines.utah.edu

40

126

GEOLOGIC MAPPING, SEDIMENTOLOGY, STRUCTURE, AND ⁴⁰AR/³⁹AR GEOCHRONOLOGY OF THE SOUTHEAST LAGUNA DEL LAJA AREA, CENTRAL ANDES, CHILE (37º30'S 71º15'W)

HERRIOTT, Trystan M.¹, CHARRIER, Reynaldo², CROFT, Darin A.³, FLYNN, John J.⁴, GANS, Phillip B.¹, WERTHEIM, Jill A.¹ and WYSS, André R.¹, (1)Earth Science, University of California, Santa Barbara, CA 93106-9630, (2)Geología, Universidad de Chile, Casilla 13518, Santiago, 21, Chile, (3)Anatomy, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-4930, (4)Paleontology, American Museum of Natural History, New York, NY 10024, trystan@umail.ucsb.edu, trystan@umail.ucsb.edu

41

127

BOREHOLE BREAKOUT AND HORIZONTAL STRESS FIELD ANALYSIS IN THE NEUQUEN AND MENDOZA RETROARC

GUZMÁN, Cecilia G.¹, CRISTALLINI, Ernesto O.¹ and BOTTESI, Germán L.², (1)Laboratorio de Modelado Geológico, Dpto. de Ciencias Geológicas, FCEyN, UBA, Pabellón II, Ciudad Universitaria, Cap. Fed., Bs. As, C1428EHA, Argentina, (2)REPSOL-YPF, Dirección de Exploración y Desarrollo de Negocio ABB, Esmeralda 255, Piso 10°, Oficina 1001E, Cap. Fed., Bs. As, C1035ABE, Argentina, ceciliagguzman@hotmail.com, ceciliagguzman@hotmail.com

42

128

DEEP SEISMIC DISCONTINUITY STRUCTURE BENEATH CENTRAL NEUQUEN BASIN, ARGENTINA

COMÍNGUEZ, Alberto, Departamento de Geofísica Aplicada, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, La Plata, 1900, Argentina and FRANZESE, Juan, Centro de Investigaciones Geologicas, Universidad Nacional de La Plata - CONICET, Calle 1 Nro. 644, La Plata, 1900, Argentina, ahcominguez@yahoo.com, ahcominguez@yahoo.com

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129

TERTIARY EVOLUTION OF THE ÑIRIHUAU BASIN, NORTHERN PATAGONIAN ANDES, ARGENTINA

ASENSIO, Marcos¹, BECHIS, Florencia², ZAVALA, Carlos¹ and CRISTALLINI, Ernesto O.³, (1)Instituto Argentino de Oceanografía (IADO), CONICET, Camino de La Carrindanga km 7.5, Bahía Blanca, 8000, Argentina, (2)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), CRICYT, CONICET, CC 330, Mendoza, 5500, Argentina, (3)Laboratorio de Modelado Geológico, FCEN, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, Buenos Aires, 1428, Argentina, masensio@uns.edu.ar, masensio@uns.edu.ar

44

130

RETROARC EXTENSION ASSOCIATED WITH REACTIVATION OF BASEMENT STRUCTURES AND RETROARC VOLCANISM (38º30S - 71ºW)

TUNSTALL Sr, Cynthia¹, FOLGUERA, Andrés¹ and RAMOS, Victor A.², (1)Laboratorio de Tectónica Andina, Universidad de Buenos Aires, Cuidad universitaria, Buenos Aires, 1428, Argentina, (2)Laboratorio de Tectónica Andina, Universidad de Buenos Aires, Ciudad universitaria, Buenos Aires, 1428, Argentina, andes@gl.fcen.uba.ar, andes@gl.fcen.uba.ar

45

131

OLIVINE HOSTED MELT INCLUSIONS FROM MAFIC SMALL ERUPTIVE CENTERS, CENTRAL SOUTHERN VOLCANIC ZONE, CHILE

WACASTER, SG., Earth Sciences, Florida International University, Department of Earth Sciences, PC 344, University Park, 11200 SW 8th Street, Miami, FL 33199 and HICKEY-VARGAS, R., Department of Earth Sciences, Florida International University, Department of Earth Sciences, PC 344, University Park, 11200 SW 8th Street, Miami, FL 33199, susan.wacaster@fiu.edu, susan.wacaster@fiu.edu

46

132

CONTINENTAL BACKARC VOLCANISM OF NORTHERN PATAGONIA: A COMPARATIVE ANALYSIS

VAN WAGONER, Nancy A.¹, HALLER, Miguel J.², MASSAFERRO, Gabriela I.² and DOSTAL, Jarda³, (1)Geology, Acadia Univ, Wolfville, NS B4P 2R6, Canada, (2)Universidad Nacional de la Patagonia San Juan Bosco - CONICET, Bvard. Brown 3500, Puerto Madryn, 9120, Argentina, (3)Earth Sciences, St. Mary's Univ, Halifax, NS B3H 3C3, Canada, nancy.vanwagoner@acadiau.ca, nancy.vanwagoner@acadiau.ca

47

133

TERTIARY STRUCTURAL EVOLUTION OF THE EASTERN BORDER OF THE NORTHERN PATAGONIAN ANDES FROM 41º TO 41º30′ S, ARGENTINA

BECHIS, Florencia, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), CRICYT, CONICET, CC 330, Mendoza, 5500, Argentina and CRISTALLINI, Ernesto O., Laboratorio de Modelado Geológico, FCEN, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, Buenos Aires, 1428, Argentina, fbechis@lab.cricyt.edu.ar, fbechis@lab.cricyt.edu.ar

48

134

EMPLACEMENT OF THRUST-SHEETS RECORDED IN UPPER CRETACEOUS BASIN FILL, MAGALLANES (AUSTRAL) BASIN, SOUTHERN CHILE

ROMANS, Brian W.¹, FILDANI, Andrea², HUBBARD, Stephen M.¹, CRANE, William H.² and GRAHAM, Stephan A.¹, (1)Department of Geological & Environmental Sciences, Stanford University, 450 Serra Mall, Bldg 320, Stanford, CA 94305, (2)ChevronTexaco ETC, San Ramon, CA 94583, bromans@pangea.stanford.edu, bromans@pangea.stanford.edu

49

135

MAGMATIC AND STRUCTURAL EVOLUTION OF THE TORTUGA OPHIOLITE, SOUTHERN CHILE

YOSHINOBU, Aaron S., Dept. of Geosciences, Texas Tech Univ, Lubbock, TX 79409-1053, aaron.yoshinobu@ttu.edu, aaron.yoshinobu@ttu.edu

50

136

ND-ISOTOPIC COMPOSITION OF JURASSIC BIMODAL METAIGNEOUS SUITES AT THE NORTHERNMOST SEAFLOOR REMNANT OF THE ROCAS VERDES BASIN (PATAGONIAN ANDES)

CALDERÓN, Mauricio, Departamento de GeologíaU, Universidad de Chile, Casilla 13518, Correo 21, Santiago, NA, Chile, HERVE, Francisco and CORDANI, Umberto, caldera@esfera.cl, caldera@esfera.cl

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MODELING GEOPHYSICAL DATA IN THE USHUAIA REGION, TIERRA DEL FUEGO, ARGENTINA: RELATIONSHIP BETWEEN INTRUSIVE BODIES AND TECTONICS

PERONI, Javier¹, TASSONE, Alejandro¹, LIPPAI, Horacio¹, LODOLO, Emanuele², MENICHETTI, Marco³ and VILAS, Juan Francisco¹, (1)Dpto. Ciencias Geológicas Instituto de Geofisica “Daniel A. Valencio”, Universidad de Buenos Aires-CONICET, FCEN Pabellón 2, entrepiso. (1428) Ciudad autónoma de Buenos Aires, Argentina, Capital, 1428, Argentina, (2)2 Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), P.O. Box 2011, 34016 Trieste, Trieste, 34016, Italy, (3)Istituto di Geodinamica e Sedimentologia, Universite di Urbino, Campus universitario, Urbino, 61029, Italy, peroni@gl.fcen.uba.ar, peroni@gl.fcen.uba.ar

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STRUCTURE AND EVOLUTION OF THE FORELAND THRUST-FOLD BELT OF THE FUEGIAN ANDES, TIERRA DEL FUEGO, ARGENTINA

TORRES CARBONELL, Pablo J., Laboratorio de Geología Andina, Centro Austral de Investigaciones Científicas (CADIC-CONICET), Houssay 200, Ushuaia, (9410), Argentina, OLIVERO, Eduardo B., Laboratorio de Geología Andina, Centro Austral de Investigaciones Cientificas (CADIC-CONICET), Houssay 200, Ushuaia, (9410), Argentina and DIMIERI, Luis V., Cátedra de Geología Estructural, Universidad Nacional del Sur, San Juan 670, Bahía Blanca, (8000), Argentina, polmacleod@hotmail.com, polmacleod@hotmail.com

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WORLD COAL QUALITY INVENTORY--ARGENTINA

BROOKS, William E., U.S. Geological Survey, 956 National Center, Reston, VA 20191, WILLETT, Jason C., U.S. Geol Survey, 956 National Center, Reston, VA 20191 and FINKELMAN, Robert B., U.S. Geological Survey, MS 956 National Center, Reston, VA 20192, wbrooks@usgs.gov, wbrooks@usgs.gov

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ORGANIC GEOCHEMISTRY AND PETROGRAPHY OF ORGANIC-RICH SEDIMENTS OF SHEMSHAK FORMATION IN EASTERN ALBORZ, NORTH IRAN

SHEKARIFARD, Ali, Mining Engineering, Tehran University, P.O. Box 11365-4563, Tehran, Iran, Tehran, Iran and SEYED-EMAMI, Kazem, Mining Engineering, Tehran University, shekarifard@gmail.com, shekarifard@gmail.com

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DON'T FORGET THE TEACHERS! (NO SE OLVIDE A LOS MAESTROS!)

PINILLA, Theresa, Stockbridge Middle School, 1126 Evergreen Way, Stockbridge, GA 30281, tpinilla@gmail.com, tpinilla@gmail.com

Backbone of the Americas—Patagonia to Alaska, (3–7 April 2006)

T5. Processes, Comparisons and Other Cordilleran Issues I: Seismicity, General Tectonic Processes, and Specific Examples