T12A:
Crustal Evolution in Large Hot Orogens From Pre-collisional Continental Margin Through the Collision and Collapse Stages: Evidence From Field, Analytical, and Numerical Studies II
Submit an Abstract to this Session
Session ID#: 6036
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: Fried Schwerdtner, University of Toronto, Earth Sciences, Toronto, ON, Canada and Aphrodite Daphnee Indares, Memorial University of Newfoundland, Earth Sciences, St John's, NL, 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:
Orogenic wedge or channel flow for the tectonic evolution of Parautochthonous Belt? New evidence from the Central Grenville Province (34953)
Sophie Jannin1, Felix Gervais1, Abdelali Moukhsil2, James L Crowley3 and Lars Eivind Augland4, (1)Polytechnique Montreal, Département des Génies civil, géologique et des mines (CGM), Montreal, QC, Canada, (2)Ministère de l'Énergie et des Ressources naturelles du Québec, Val D'Or, QC, Canada, (3)Boise State University, Boise, ID, United States, (4)Université du Québec à Montréal, centre GEOTOP-Département des sciences de la Terre et de l'Atmosphère, Montréal, QC, Canada
Syn-orogenic High Fe-Ti Tholeiitic Magmatism in the Hinterland of Central Grenville Province: Implications for the Evolution of Large Hot Long Duration Orogens. (35180)
Barun Maity, Memorial University of Newfoundland, Earth Sciences, St. John's, NF, Canada, Aphrodite Daphnee Indares, Memorial University of Newfoundland, Earth Sciences, St John's, NL, Canada and Greg Dunning, Memorial University of Newfoundland, Earth Sciences, St John's, NF, Canada
Metamorphic Patterns of Aluminous Rocks from High and Mid-pressure Crustal Segments of the Central Grenville Province- a Review (35426)
Aphrodite Daphnee Indares, Memorial University of Newfoundland, Earth Sciences, St John's, NL, Canada and Greg Dunning, Memorial University of Newfoundland, Earth Sciences, St John's, NF, Canada
The Supracrustal Rocks of the Escoumins Area: a Well-Preserved Pinwarian Arc-Backarc Sequence in the Central Grenville, Quebec. (34471)
Pierre-Arthur Groulier1, Aphrodite Daphnee Indares2, Abdelali Moukhsil3, Greg Dunning1 and Stephen J Piercey1, (1)Memorial University of Newfoundland, Earth Sciences, St John's, NF, Canada, (2)Memorial University of Newfoundland, Earth Sciences, St John's, NL, Canada, (3)Ministère de l'Énergie et des Ressources naturelles du Québec, Val D'Or, QC, Canada
