V24B:
Partial Melting During High-Grade Metamorphism: Implications for Orogenic Systems I

Submit an Abstract to this Session



Session ID#: 35672

Session Description:
During orogenesis, deep crustal rocks commonly reach pressure–temperature conditions sufficient for partial melting to occur, either during burial or exhumation. The presence of melt has major rheologic implications for mountain building, as it changes the viscosity, density, and how strain is partitioned during orogenesis. In addition, melt extraction and magma emplacement contribute to crustal differentiation and stabilization over geologic time. These combined processes may also drive the collapse and exhumation of orogenic belts, and aid in exhuming (ultra)high-pressure terranes. This session seeks contributions that investigate the quantity, timing, and/or conditions at which partial melting occurs in different geodynamic environments, and the implications that anatexis has on the evolution of orogenic belts and subducted crustal material. We encourage abstracts that use a variety of techniques, such as field mapping, phase equilibria modeling, petrochronology, geochemistry, and geodynamic and/or geophysical modeling.
Primary Convener:  Stacia M Gordon, University of Nevada, Reno, Department of Geological Sciences and Engineering, Reno, United States
Conveners:  Chris Yakymchuk, University of Waterloo, Earth and Environmental Sciences, Waterloo, ON, Canada and Richard Mark Palin, Colorado School of Mines, Department of Geology and Geological Engineering, Golden, CO, United States
Chairs:  Chris Yakymchuk, University of Waterloo, Earth and Environmental Sciences, Waterloo, ON, Canada, Richard Mark Palin, Colorado School of Mines, Department of Geology and Geological Engineering, Golden, CO, United States and Stacia M Gordon, University of Nevada, Reno, Department of Geological Sciences and Engineering, Reno, United States
OSPA Liaison:  Richard Mark Palin, Colorado School of Mines, Department of Geology and Geological Engineering, Golden, CO, United States

Cross-Listed:
  • T - Tectonophysics
Index Terms:

3660 Metamorphic petrology [MINERALOGY AND PETROLOGY]
8160 Rheology: general [TECTONOPHYSICS]
8178 Tectonics and magmatism [TECTONOPHYSICS]
8412 Reactions and phase equilibria [VOLCANOLOGY]

Abstracts Submitted to this Session:

Phase Equilibria Modelling of Residual Migmatites and Granulites: an Evaluation of the Melt-Reintegration Approach (208784)
Omar Bartoli, University of Padova, Geoscience Department, Padova, Italy
Diapir versus along-channel ascent of crustal material during plate convergence: constrained by the thermal structure of subduction zones (210666)
Mingqi Liu1,2 and Zhong-Hai Li1, (1)University of Chinese Academy of Sciences, Key Laboratory of Computational Geodynamics, College of Earth Sciences, Beijing, China, (2)Chinese Academy of Geological Sciences, Key Laboratory of Continental Tectonics and Dynamics, Institute of Geology, Beijing, China
Modelling crustal differentiation: A thermodynamic approach (Invited) (226738)
Gautier Nicoli, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Marcos Garcia-Arias, Universidad de Los Andes, Geosciences, Bogotá, Colombia and Brendan Joel Dyck, University of Cambridge, Cambridge, United Kingdom
Generating Melt During Exhumation of Continental Crust from Ultrahigh Pressure (UHP) Conditions (254264)
Michael Brown, University of Maryland, Laboratory for Crustal Petrology, Department of Geology, College Park, MD, United States, Songjie Wang, China University of Geosciences Wuhan, State Key Laboratory of Geological Processes and Mineral Resources, and Center for Global Tectonics, School of Earth Sciences, Wuhan, China; Shandong University of Science and Technology, College of Earth Science and Engineering, Qingdao 266510, China, Lu Wang, China University of Geosciences, Wuhan, State Key Laboratory of Geological Processes and Mineral Resources, and Center for Global Tectonics, School of Earth Sciences, Wuhan, China, Philip M Piccoli, University of Maryland, Laboratory for Crustal Petrology, Department of Geology, College Park, United States and Tim E Johnson, Curtin University, School of Earth and Planetary Sciences, The Institute for Geoscience Research (TIGeR), Perth, Australia
Remelting of nanogranitoids in UHP felsic granulites from Erzgebirge (Bohemian Massif, Germany) (265601)
Antonio Acosta-vigil, Università di Padova, Geoscienze, Padova, Italy; Organization Not Listed, Washington, DC, United States, Bernhard Stöckhert, Ruhr University Bochum, Institute für Geologie, Mineralogie und Geophysik, Bochum, Germany, Jörg Hermann, University of Bern, Institute of Geological Sciences, Bern, Switzerland, Greg Yaxley, Australian National University, Research School of Earth Sciences, Canberra, Australia, Bernardo Cesare, University of Padova, Geoscience Department, Padova, Italy and Omar Bartoli, Università degli Studi di Padova, Dipartimento di Geoscienze, Padova, Italy
Partial melting of amphibolites in the Eastern Segment of the Sveconorwegian orogen, southern Sweden. (258293)
Edward Conrad Hansen1, Erin Brophy1, Max Everett Huffman2 and Charlotte Möller3, (1)Hope College, Geological and Environmental Sciences, Holland, MI, United States, (2)Hope College, Geological and Environmental Science, Holland, United States, (3)Lund University, Department of Geology, Lund, Sweden
Synchronous partial melting, deformation, and magmatism: evidence from in an exhumed Proterozoic orogen (Invited) (265311)
Jamie S. F. Levine, Appalachian State University, Department of Geological and Environmental Sciences, Boone, NC, United States and Sharon Mosher, Univ Texas, Austin, TX, United States

See more of: Volcanology, Geochemistry and Petrology