2009 Portland GSA Annual Meeting (18-21 October 2009)
Session No. 63 Sunday, 18 October 2009
1:30 PM-5:30 PM, Oregon Convention Center: A105

T73. Melt Microstructures: Evidence for the Presence of Melt and Consequences for Deforming Continental Crust (GSA Structural Geology and Tectonics Division)

Jamie Levine and Christine S. Siddoway, Presiding
 Paper #Start Time
 1:30 PM Introductory Remarks
63-11:35 PM PORE SIZE AS A DETERMINANT FOR SOLIDIFICATION MICROSTRUCTURES: HOLNESS, Marian B., Dept. Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ United Kingdom, marian@esc.cam.ac.uk
63-21:55 PM EVOLUTION OF MICROSTRUCTURE AND MELT TOPOLOGY IN PARTIALLY MOLTEN GRANITIC MYLONITE: IMPLICATION ON THE RHEOLOGY OF PARTIALLY MOLTEN LOWER CRUST: SCHULMANN, Karel, EOST, Université de Strasbourg, 1 rue Blessig, Strasbourg 67000, Schulman@illite.u-strasbg.fr
63-32:15 PM THERMAL FEEDBACKS BETWEEN STRAIN HEATING AND MELT PRODUCTION IN OROGENIC BELTS: WHITTINGTON, Alan, Department of Geological Sciences, University of Missouri, Columbia, MO 65211, whittingtona@missouri.edu, HOFMEISTER, Anne, Department of Earth and Planetary Sciences, Washington University, Campus Box 1169, St. Louis, MO 63130, and NABELEK, Peter, Geological Sciences, Univ of Missouri-Columbia, 101 Geological Sciences Bldg, Columbia, MO 65211
 2:30 PM Discussion
63-42:45 PM PARTIAL MELTING DURING MID- TO LOWER-CRUSTAL DEFORMATION: “IN SITU” MELTS, MELT CHANNEL-WAYS, AND TEMPORAL EVOLUTION OF MELT CHEMISTRY: BARQUERO-MOLINA, Miriam, Department of Geological Sciences, University of Missouri, 101 Geological Sciences Building, Columbia, MO 65203, barqueromolinam@missouri.edu, LEVINE, Jamie, Dept Geological Sciences, The Univ of Texas at Austin, Austin, TX 78712, and MOSHER, Sharon, Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, 1 University Station C1100, Austin, TX 78712-0254
63-53:00 PM “NANOGRANITE” INCLUSIONS IN PERITECTIC MINERALS: FINDING THE ANATECTIC MELT IN MIGMATITES AND GRANULITES: CESARE, Bernardo1, FERRERO, Silvio1, BARTOLI, Omar2, BRAGA, Roberto3, SALVIOLI-MARIANI, Emma2, ACOSTA-VIGIL, Antonio4, and MELI, Sandro2, (1) Department of Geosciences, University of Padua, via Giotto 1, Padova, 35137, Italy, bernardo.cesare@unipd.it, (2) Earth Sciences Department, University of Parma, Parma, 43100, Italy, (3) Dipartimento di Scienze della Terra e Geologico-Ambientali, University of Bologna, Bologna, 401126, Italy, (4) Instituto Andaluz de Ciencias de la Tierra, CSIC, Granada, 18002, Spain
63-63:20 PM GENERATION AND CONTAMINATION OF GRANITIC MAGMA IN THE DEEP CRUST, ATHABASCA GRANULITE TERRANE, SASKATCHEWAN: KOTEAS, G. Christopher, WILLIAMS, Michael L., and SEAMAN, Sheila J., Department of Geosciences, University of Massachusetts, 611 North Pleasant Street, 233 Morrill Science Center, Amherst, MA 01003, ckoteas@geo.umass.edu
 3:35 PM Break
 3:50 PM Panel Discussion
63-74:10 PM MELT MICROSTRUCTURES PROVIDE EVIDENCE FOR PERVASIVE PARTIAL MELTING WITHIN SHEAR ZONES AND SURROUNDING COUNTRY ROCK: LEVINE, Jamie, Dept Geological Sciences, The Univ of Texas at Austin, Austin, TX 78712, levinejs@mail.utexas.edu and MOSHER, Sharon, Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, 1 University Station C1100, Austin, TX 78712-0254
63-84:25 PM RHEOLOGICAL TRANSITION DURING SYN-TECTONIC PARTIAL MELTING AND CRYSTALLIZATION OF METAPELITES: AN EXPERIMENTAL STUDY: MISRA, Santanu, BURLINI, Luigi, and BURG, Jean-Pierre, Geological Institute, ETH Zurich, NO E, Sonneggstrasse 5, Zurich, CH-8092, Switzerland, santanu.misra@erdw.ethz.ch
63-94:40 PM WIDESPREAD OCCURRENCES OF HöGBOMITE (2N2S) IN UHT METAPELITES FROM THE BETROKA BELT, SOUTHERN MADAGASCAR: IMPLICATIONS ON MELT/FLUID ACTIVITY DURING REGIONAL METAMORPHISM: RAKOTONANDRASANA, Nirihaja Othon Thierry1, ARIMA, Makoto1, MIYAWAKI, Ritsuro2, and RAMBELOSON, Roger Andriamampianina3, (1) Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan, rakoto_thierry@yahoo.fr, (2) Department of Geology, National Science Museum, 3-23-1, Hyakunin-cho, Shinjuku, Tokyo, 169-0073, Japan, (3) Département des Sciences de la Terre, Faculté des Sciences, Université d'Antananarivo, PB 906, Antananarivo, 101, Madagascar

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