GD5.1 Media

Subduction drives plate tectonics, generates the major proportion of subaerial volcanism, forms continents, and entrains surface material back to the deep Earth. Therefore, it is arguably the most important geodynamical phenomenon on Earth and the major driver of global geochemical cycles. Seismological data show a fascinating range in shapes of subducting slabs. Arc volcanism illustrates the complexity of geochemical and petrological phenomena associated with subduction. Surface topography provides insight in the orogenic processes related to subduction and continental collision.

Numerical and laboratory modelling studies have successfully built our understanding of many aspects of the geodynamics of subduction zones. Detailed geochemical studies, investigating compositional variation within and between volcanic arcs, provide further insights into systematic chemical processes at the slab surface and within the mantle wedge, providing constraints on thermal structures and material transport within subduction zones. However, with different technical and methodological approaches, model set-ups, inputs and material properties, and in some cases conflicting conclusions between chemical and physical models, a consistent picture of the controlling parameters of subduction-zone processes has so far not emerged.

This session aims to follow subducting lithosphere on its journey from the surface down into the Earth's mantle, and to understand the driving processes for deformation and magmatism in the over-riding plate. We aim to address topics such as: subduction initiation and dynamics; changes in mineral breakdown processes at the slab surface; the formation and migration of fluids and melts at the slab surface; primary melt generation in the wedge; subduction-related magmatism; controls on the position and width of the volcanic arc; subduction-induced seismicity; mantle wedge processes; the fate of subducted crust, sediments and volatiles; the importance of subducting seamounts, LIPs, and ridges; links between near-surface processes and slab dynamics and with regional tectonic evolution; slab delamination and break-off; the effect of subduction on mantle flow; and imaging subduction zone processes.

With this session, we aim to form an integrated picture of the subduction process, and invite contributions from a wide range of disciplines, such as geodynamics, modelling, geochemistry, petrology, volcanology and seismology, to discuss subduction zone dynamics at all scales from the surface to the lower mantle, or in applications to natural laboratories.

Co-organized as GMPV2.5/SM4.14/TS9.15
Convener: Valentina Magni | Co-conveners: Taras Gerya, Oğuz H Göğüş, Wim Spakman
| Mon, 08 Apr, 10:45–12:30, 14:00–18:00
Room D1
| Attendance Mon, 08 Apr, 08:30–10:15
Hall X2

Monday, 8 April 2019 | Room D1

Chairperson: Valentina Magni, Wim Spakman
10:45–11:00 |
Joao Duarte, Nicolas Riel, Chiara Civiero, Filipe Rosas, Wouter Schellart, Jaime Almeida, Sonia Silva, and Pedro Terrinha
11:00–11:15 |
Jessica Munch, Taras Gerya, and Kosuke Ueda
11:15–11:30 |
Jaime Almeida, Nicolas Riel, Filipe Rosas, and João Duarte
11:30–11:45 |
Kiran Chotalia, George Cooper, Fabio Crameri, Mathew Domeier, Caroline Eakin, Antoniette Greta Grima, Derya Gürer, Ágnés Király, Valentina Magni, Elvira Mulyukova, Kalijn Peters, Boris Robert, Grace Shephard, and Marcel Thielmann
12:00–12:15 |
Carolyn Tewksbury-Christle, Whitney Behr, and Mark Helper
12:15–12:30 |
Martina Casalini, Riccardo Avanzinelli, Simone Tommasini, Tim Elliott, and Sandro Conticelli
Lunch break
Chairperson: Oğuz Göğüş, Taras Gerya
14:30–14:45 |
Sascha Zertani, Timm John, Johannes C. Vrijmoed, Frederik Tilmann, Loic Labrousse, and Torgeir B. Andersen
14:45–15:00 |
William Barnhart, Katherine Peterson, and Shaoyang Li
15:00–15:15 |
Wouter P. Schellart, Zhihao Chen, Vincent Strak, João Duarte, and Filipe Rosas
15:15–15:30 |
Malwina San-José, Jeremy Caves Rugenstein, Giuditta Fellin, Domenico Cosentino, Massimiliano Ghinassi, Ivan Martini, and Claudio Faccenna
15:30–15:45 |
Omer Bodur, Oğuz Hakan Göğüş, Sascha Brune, Hasan Sözbilir, Anne Glerum, and Deniz Ural
Coffee break
Chairperson: Taras Gerya, Valentina Magni
16:15–16:30 |
Taco Broerse, Ernst Willingshofer, Dimitrios Sokoutis, and Rob Govers
16:30–16:45 |
Zoltán Erdős, Ritske S. Huismans, and Claudio Faccenna
16:45–17:00 |
Joost van den Broek, Valentina Magni, Carmen Gaina, and Susanne Buiter
17:00–17:15 |
Alexander Koptev, Anouk Beniest, Taras Gerya, Todd Ehlers, Laurent Jolivet, and Sylvie Leroy
17:15–17:30 |
| solicited
Saskia Goes, Roberto Agrusta, Jeroen van Hunen, and Fanny Garel
17:30–17:45 |
Antoniette Greta Grima, Carolina Lithgow-Bertelloni, and Fabio Crameri
17:45–18:00 |
Fangqin Chen, Wim Spakman, and Gordon Lister