2009 Portland GSA Annual Meeting (18-21 October 2009)

Session No. 79
Monday, 19 October 2009: 8:00 AM-12:00 PM
A107/108/109 (Oregon Convention Center)

T45. Growth and Stabilization of Continental Crust in Circum-Pacific Accretionary Orogens

GSA Structural Geology and Tectonics Division

 

Christine S. Siddoway and David Foster, Advocates
Paper #
Start Time
1
8:00 AM
DEMISE OF ARC MAGMATISM ALONG THE PANAMA CANAL
FARRIS, David W.1, CARDONA, Agustin2, MONTES, Camilo2 and JARAMILLO, Carlos2, (1)Earth, Ocean, and Atmospheric Science, Florida State University, 909 Antarctic Way, Rm 108 CAR, Tallahassee, FL 32306, (2)Smithsonian Tropical Research Institute, Unit 0948, APO AA 34002, Balboa, Ancon, Panama, 0843-03092, Panama, farris@gly.fsu.edu, farris@gly.fsu.edu
2
8:15 AM
STRUCTURAL TRANSECTS ACROSS THE ISTHMUS OF PANAMA: OROCLINE OR SUBDUCTION-RELATED GEOMETRY?
MONTES, Camilo1, CARDONA, Agustin1, BAYONA, Germán2, SILVA, Cesar3, FARRIS, David W.4, MORON, Sara1, WILSON, James5 and VALENCIA, Victor A.6, (1)Smithsonian Tropical Research Institute, Unit 0948, APO AA 34002, Balboa, Ancon, Panama, 0843-03092, Panama, (2)Corporación Geológica ARES, Calle 44A N. 53-96, Bogotá, Colombia, Colombia, (3)Corporación Geológica ARES, Bogota, Colombia, (4)Earth, Ocean, and Atmospheric Science, Florida State University, 909 Antarctic Way, Rm 108 CAR, Tallahassee, FL 32306, (5)Department of Geology, University of South Florida, 4202 E. Fowler Ave, SCA 528, Tampa, FL 33620, (6)Department of Geosciences, University of Arizona, Tucson, AZ 85721, montesc@si.edu, montesc@si.edu
3
8:30 AM
RYSTALLIZATION AGE and MAGMA SOURCES of the AntioqueÑo and OVEJAS BATHOLITHS, CENTRAL CORDILLERA, Colombia: EVIDENCE FROM COMBINED LA-ICP-MS U–PB DATING and HF-ISOTOPE ANALYSIS of ZIRCON GRAINS and WHOLE-ROCK GEOCHEMISTRY
RESTREPO-MORENO, Sergio Andres, Escuela de Ingeniería de Antioquia, Km 2 + 200 Vía Aeropuerto J.M. Córdova, Envigado, 00001, Colombia, FOSTER, David A., Department of Geological Sciences, University of Florida, PO Box 112120, Gainesville, FL 32611-2120 and KAMENOV, G.D., Department of Geological Sciences, University of Florida, Gainesville, FL 32611, sergiorm@ufl.edu, sergiorm@ufl.edu
4
8:45 AM
APPLICATION OF LU-HF GARNET DATING TO UNRAVEL THE RELATIONSHIPS BETWEEN DEFORMATION, METAMORPHISM AND PLUTONISM: AN EXAMPLE FROM THE PRINCE RUPERT AREA, BRITISH COLUMBIA
WOLF, David E., Earth and Atmospheric Sciences, Cornell University, 4154 Snee Hall, Ithaca, NY 14853-1504, ANDRONICOS, Christopher L., Earth and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907, VERVOORT, Jeffery D., School of the Environment, Washington State University, Pullman, WA 99164, MANSFIELD, Michael R., Department of Geological Sciences, University of Texas El Paso, 500 W University Ave, El Paso, TX 79968 and CHARDON, Dominique, Laboratoire des Mécanismes et Transferts en Géologie, Université de Toulouse, 14 avenue Edouard Belin, Toulouse, 31400, France, dew36@cornell.edu, dew36@cornell.edu
5
9:00 AM
TESTING HYPOTHESES ON THE ORIGIN OF THE SYRINGA EMBAYMENT IN THE SALMON RIVER SUTURE ZONE, WESTERN IDAHO, USA
SCHMIDT, Keegan L., Division of Natural Science, Lewis - Clark State College, Lewiston, ID 83501, LEWIS, Reed S., Idaho Geological Survey, University of Idaho, P.O. Box 443014, Moscow, ID 83844-3014, GASCHNIG, Richard M., School of Earth and Environmental Sciences, Washington State University, Webster Physical Science Building 1228, Pullman, WA 99164-2812 and VERVOORT, Jeffrey, School of Earth and Environmental Sciences, Washington State University, Webster Physical Science Building 1228, Pullman, WA 99164, klschmidt@lcsc.edu, klschmidt@lcsc.edu
6
9:15 AM
RIDGE SUBDUCTION AS A PROCESS FOR CONTINENTALIZATION OF AN ACCRETIONARY PRISM, CHUGACH METAMORPHIC COMPLEX, SOUTHERN ALASKA
SCHARMAN, Mitchell R., Department of Geological Sciences, University of Texas at El Paso, El Paso, TX 79968-0555 and PAVLIS, Terry, Geological Sciences, University of Texas at El Paso, 500 W. University Ave, El Paso, TX 79968, mrscharman@miners.utep.edu, mrscharman@miners.utep.edu
7
9:30 AM
CONTINENTAL DECRETION DURING TERRANE ACCRETION IN THE CANADIAN CORDILLERA
COOK, Frederick, Geoscience, University of Calgary, Calgary, AB T2N1N4, Canada, fcook@ucalgary.ca, fcook@ucalgary.ca
8
9:45 AM
THE TECTONIC SIGNIFICANCE OF MIXED I- AND S-TYPE MAGMATIC BELTS: LESSONS FROM THE CORDILLERAN OROGEN OF WESTERN NORTH AMERICA
JOHNSTON, Stephen T., School of Earth and Ocean Sciences, University of Victoria, Bob Wright Centre, PO Box 3065 STN CSC, Victoria, BC V8W 3V6, Canada, stj@uvic.ca, stj@uvic.ca
 
10:05 AM
Break
9
10:20 AM
EXOTIC TERRANES AND THE DYNAMICS OF ACCRETIONARY OROGENS
REY, Patrice F., Earthbyte Research Group, School of Geosciences, University of Sydney, Sydney, NSW2006, Australia, p.rey@usyd.edu.au, p.rey@usyd.edu.au
10
10:40 AM
ISOTOPIC PERSPECTIVES ON 150 MA OF SUBDUCTION-RELATED CRUSTAL GROWTH IN THE SOUTH PATAGONIAN BATHOLITH
FANNING, C. Mark1, HERVÉ, Francisco2, PANKHURST, Robert J.3, CALDERÓN, Mauricio N.4, YAXLEY, Greg M.5 and HOLDEN, Peter5, (1)Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia, (2)Departamento de Geología, Universidad de Chile, Casilla 13518, Correo 21, Plaza Ercilla 803, Santiago, Chile, (3)British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom, (4)Departamento de Geología, Universidad de Chile, Santiago, 13518, Chile, (5)Research School of Earth Sciences, Australian National University, Mills Road, Acton ACT, 0200, Australia, mark.fanning@anu.edu.au, mark.fanning@anu.edu.au
11
11:00 AM
GROWTH AND STABILIZATION OF CONTINENTAL CRUST BY BACKARC OPENING AND CLOSING IN THE PALEOZOIC TASMANIDES OF EASTERN AUSTRALIA
COLLINS, William J., Earth & Environmental Sciences, James Cook University, Douglas Campus, James Cook University, Townsville, 4811, Australia, bill.collins@jcu.edu.au, bill.collins@jcu.edu.au
12
11:15 AM
THE RECORD OF EAST GONDWANA MARGIN CYCLES IN WEST ANTARCTICA: EVIDENCE FROM MARIE BYRD LAND
SIDDOWAY, Christine S., Geology Department, Colorado College, 14 E. Cache La Poudre St, Colorado Springs, CO 80903, FANNING, C. Mark, Research School of Earth Sciences, Australian National Univ, Canberra, ACT, Australia and MCFADDEN, Rory, Geology & Geophysics, Univ of Minnesota, Minneapolis, MN 55455, csiddoway@coloradocollege.edu, csiddoway@coloradocollege.edu
13
11:30 AM
CRUSTAL FORMATION AND RECYCLING DURING SUPERCONTINENT CYCLES: EVIDENCE FROM DETRITAL ZIRCONS OF THE DAMARA OROGEN
NEWSTEAD, Brittany L., Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32611, FOSTER, David A., Department of Geological Sciences, University of Florida, PO Box 112120, Gainesville, FL 32611-2120, GOSCOMBE, Ben D., School of Earth and Environmental Sciences, University of Adelaide, Adelaide, 5005, Australia and MUELLER, Paul A., Department of Geological Sciences, University of Florida, Gainesville, FL 32611, bnews85@gmail.com, bnews85@gmail.com
14
11:45 AM
LEADING CONTINENTAL EDGES, ACCRETIONARY OROGENS AND RECONSTRUCTION OF ANCIENT SUPERCONTINENTS
MURPHY, J. Brendan, Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada, NANCE, R. Damian, Dept. of Geological Sciences, Ohio Univ, Athens, OH 45701, GUTIERREZ-ALONSO, Gabriel, Departamento de Geologia, Universidad de Salamanca, Salamanca, 37008, Spain and KEPPIE, J. Duncan, Departamento de Geología Regional, Instituto de Geología, Universidad Nacional Autonoma de México, Mexico, 04510, Mexico, bmurphy@stfx.ca, bmurphy@stfx.ca
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