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

Session No. 14

Thursday, 29 March 2012: 14:30-16:30

Juarez 3 (Hotel Misión Juriquilla)

S1. Amalgamation and Breakup of Pangea in the Americas II

IGCP 597 (Origin and Evolution of Pangea) and IGCP 574 (Bending and Bent Orogens, Continental Ribbons)

J. Brendan Murphy, Jarda Dostal and R. Damian Nance, Conveners

Paper #

Start Time

1

14:30

PROVENANCE AND EVOLUTION OF LOWER PALEOZOIC ROCKS FROM YUCATAN: NEW ISOTOPIC (HF, ND) AND AGE EVIDENCE

WEBER, Bodo, Departamento de Geología, CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Palyitas, Ensenada, B.C, 22860, Mexico, SCHERER, Erik E., Institut für Mineralogie, Universität Münster, Corrensstrasse 24, D-48149, Münster, Germany, MARTENS, Uwe K., Tectonic Analysis Ltd, 1315 Alma Ave, Ste 134, Walnut Creek, CA 94596 and MEZGER, Klaus, Institut für Geologie, Universität Bern, Baltzerstrasse 1-3, Bern, 3012, Switzerland, bweber@cicese.mx, bweber@cicese.mx

2

14:50

THE TRIASSIC–JURASSIC AYÚ COMPLEX, SOUTHERN MEXICO: DERIVATION FROM THE WESTERN MARGIN OF PANGEA-A

HELBIG, Maria, Centro de Geociencias, UNAM, Campus Juriquilla, Blvd Juriquilla 3001, Juriquilla, Querétaro, 76230, Mexico, KEPPIE, J. Duncan, Departamento de Geología Regional, Instituto de Geología, Universidad Nacional Autónoma de México, México, DF 04510, Mexico, MURPHY, J. Brendan, Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada and SOLARI, Luigi, Universidad Nacional Autónoma de México, Centro de Geociencias, Campus Juriquilla, Santiago de Querétaro, 76001, Mexico, mhelbig@geociencias.unam.mx, mhelbig@geociencias.unam.mx

3

15:10

ARC-RELATED INTRUSIONS IN THE OAXACAN COMPLEX: EVIDENCE FOR EARLY TO LATE PERMIAN PACIFIC PLATE SUBDUCTION BENEATH THE WEST CENTRAL MARGIN OF GONDWANA

ORTEGA-OBREGÓN, Carlos¹, SOLARI, Luigi¹, ORTEGA-GUTIÉRREZ, Fernando² and ELIAS-HERRERA, Mariano², (1)Universidad Nacional Autónoma de México, Centro de Geociencias, Campus Juriquilla, Santiago de Querétaro, 76001, Mexico, (2)Geología Regional, Instituto de Geología, UNAM, Ciudad Universitaria, Coyoacan, Mexico DF, 04510, Mexico, cortega@geociencias.unam.mx, cortega@geociencias.unam.mx

4

15:30

MEXICAN MARGIN OF PANGÆA: LATE PALEOZOIC TECTONIC SWITCHING FOLLOWED BY EARLY MESOZOIC SHIFT FROM ISLAND TO CONTINENTAL ARC DURING PANGÆA BREAKUP

KEPPIE, John Duncan, Depto. De Geologia Regional, Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico City, 14510, Mexico, GALAZ-ESCANILLA, Gonzalo, Depto. De Geologia Regional, Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico City, 04510, Mexico, HELBIG, Maria, Centro de Geociencias, UNAM, Campus Juriquilla, Blvd Juriquilla 3001, Juriquilla, Querétaro, 76230, Mexico, KIRSCH, Moritz, Universidad Nacional Autónoma de México, Centro de Geociencias, Campus Juriquilla, Santiago de Querétaro, 76001, Mexico, DOSTAL, Jaroslav, Geology, Saint Mary's University, 923 Robie St, Halifax, NS B3H 3C3, Canada, MURPHY, J. Brendan, Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS B2G 2W5, Canada and NANCE, R. Damian, Department of Geological Sciences, Ohio University, Athens, OH 45701, duncan@unam.mx, duncan@unam.mx

5

15:50

AN ALTERNATIVE RECONSTRUCTION OF PANGEA A FOR MIDDLE AMERICA WITH BOTH THE CHORTIS AND YUCATAN BLOCKS IN THE GULF OF MEXICO

KEPPIE, D. Fraser, Nova Scotia Department of Natural Resources, 1701 Hollis St., PO Box 698, Halifax, NS B3J2T9, Canada and KEPPIE, J. Duncan, Departamento de Geología Regional, Instituto de Geología, Universidad Nacional Autónoma de México, México, DF 04510, Mexico, keppiedf@gov.ns.ca, keppiedf@gov.ns.ca

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