T11A:
Crustal Evolution in Large Hot Orogens From Pre-collisional Continental Margin Through the Collision and Collapse Stages: Evidence From Field, Analytical, and Numerical Studies I
Submit an Abstract to this Session
Session ID#: 6840
Session Description:
Large hot orogens (LHOs) are major sites of heat loss and recycling of continental crust. The tectonic evolution of LHOs has traditionally been considered in terms of processes during the formation of double thickness crust under an orogenic plateau, but recent work suggests it is also influenced by the pre-collisional history of the margins. In addition, gravitationally driven collapse and associated magmatism and fluid influx may exert important controls on the final crustal architecture. With respect to thermal structure, the origin and duration of the peak granulite-facies temperatures in the middle and lower crust of LHOs and their link to syn-orogenic magmatism remain incompletely understood.
This special session will feature contributions on recent modelling and field-based studies of the Grenville Province, an example of the exhumed roots of an LHO, but contributions from other LHOs such as the Variscan Belt and the Himalaya-Tibet Orogen are strongly encouraged.
Session Description - en français: Large hot orogens (LHOs) are major sites of heat loss and recycling of continental crust. The tectonic evolution of LHOs has traditionally been considered in terms of processes during the formation of double thickness crust under an orogenic plateau, but recent work suggests it is also influenced by the pre-collisional history of the margins. In addition, gravitationally driven collapse and associated magmatism and fluid influx may exert important controls on the final crustal architecture. With respect to thermal structure, the origin and duration of the peak granulite-facies temperatures in the middle and lower crust of LHOs and their link to syn-orogenic magmatism remain incompletely understood.
This special session will feature contributions on recent modelling and field-based studies of the Grenville Province, an example of the exhumed roots of an LHO, but contributions from other LHOs such as the Variscan Belt and the Himalaya-Tibet Orogen are strongly encouraged.
OSPA Liaison: Toby Rivers, Memorial University of Newfoundland, Earth Sciences, St John's, NF, Canada
Chairs: Aphrodite Daphnee Indares, Memorial University of Newfoundland, Earth Sciences, St John's, NL, Canada and Toby Rivers, Memorial University of Newfoundland, Earth Sciences, St John's, NF, Canada
Primary Convener: Aphrodite Daphnee Indares, Memorial University of Newfoundland, Earth Sciences, St John's, NL, Canada
Conveners: Toby Rivers, Memorial University of Newfoundland, Earth Sciences, St John's, NF, Canada and Fried Schwerdtner, University of Toronto, Earth Sciences, Toronto, ON, Canada
Co-Sponsor(s):
Abstracts Submitted to this Session:
What controls the geometry of large collisional orogens: insights from numerical modelling (36531)
Katharina Vogt1, Liviu-Ciprian Matenco2, Taras Gerya3 and Sierd Cloetingh1, (1)Utrecht University, Utrecht, Netherlands, (2)Utrecht University, Utrecht, 3584, Netherlands, (3)ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland
Thermal Evolution of the Pamir Deep Crust Constrained using Lu-Hf and U-Pb Geochronology, and Garnet Thermometry (33393)
Matthijs A Smit, University of British Columbia, Department of Earth, Ocean, and Atmospheric Sciences, Vancouver, BC, Canada, Lothar Ratschbacher, TU Bergakademie Freiberg, Geologie, Freiberg, Germany, Ellen Kooijman, Swedish Museum of Natural History, Stockholm, Sweden and Michael A Stearns, University of California Santa Barbara, Santa Barbara, CA, United States
Crustal Structure Variation Across the Western Himalayas and Tibet (35784)
Amy Gilligan1,2, Keith F Priestley1, Steven W Roecker3, Vadim L Levin4 and Shyam Sundar Rai5, (1)University of Cambridge, Cambridge, United Kingdom, (2)Imperial College London, London, United Kingdom, (3)Rensselaer Polytechnic Inst, Earth & Environmental Sciences, Troy, United States, (4)Rutgers University, Earth and Planetary Sciences, Piscataway, United States, (5)National Geophys Res Instt, Hyderabad, India
Syn-Compression Normal-Sense Low-Angle Detachment in the Himalayan Foreland, Western Nepal: Implications for Orogenic Models (33713)
Renaud Soucy La Roche1, Laurent Godin1 and John M Cottle2, (1)Queen's University, Geological Sciences & Geological Engineering, Kingston, ON, Canada, (2)University of California Santa Barbara, Santa Barbara, United States
Crustal evolution of ca. 1.9-1.85 Ga collisional orogen associated with the massif-type anorthosite in the Yeongnam Massif, Korea (36410)
Moonsup Cho1, Yuyoung Lee1, Wonseok Cheong1 and Keewook Yi2, (1)Seoul National University, Seoul, Korea, Republic of (South), (2)Korea Basic Science Institute, Division of Earth and Environmental Sciences, Ochang, Chungbuk, Korea, Republic of (South)
