GD4.1 | Initiation and evolution of subduction: dynamics, volatiles and melts from the surface to the deep mantle
EDI
Initiation and evolution of subduction: dynamics, volatiles and melts from the surface to the deep mantle
Co-organized by GMPV4/SM4/TS2
Convener: Ágnes KirályECSECS | Co-conveners: Jeroen van Hunen, César R. Ranero, Oğuz H Göğüş, Taras Gerya
Orals
| Fri, 19 Apr, 10:45–12:30 (CEST), 14:00–15:45 (CEST), 16:15–18:00 (CEST)
 
Room D1
Posters on site
| Attendance Thu, 18 Apr, 16:15–18:00 (CEST) | Display Thu, 18 Apr, 14:00–18:00
 
Hall X2
Posters virtual
| Attendance Thu, 18 Apr, 14:00–15:45 (CEST) | Display Thu, 18 Apr, 08:30–18:00
 
vHall X2
Orals |
Fri, 10:45
Posters on site |
Thu, 16:15
Posters virtual
Thu, 14:00
Subduction drives plate tectonics, generating the major proportion of subaerial volcanism, releasing >90% seismic moment magnitude, forming continents, and recycling lithosphere. 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.

Orals: Fri, 19 Apr | Room D1

Chairpersons: César R. Ranero, Taras Gerya, Ágnes Király
10:45–10:46
Introduction
EGU24-10345
|
ECS
|
On-site presentation
Subduction initiation, propagation and progression recorded along the Sulu and Celebes seas (SE Asia)
Patricia Cadenas Martínez and César R. Ranero
EGU24-339
|
ECS
|
On-site presentation
Genesis and Tectonic Setting of Yanshanian Magmatic Rocks in the Northern Margin of South China Sea
fanrong lu and junfeng zhao
EGU24-21046
|
ECS
|
On-site presentation
On the iron isotope systematics of subducted oceanic gabbros
Alex Churchus et al.
EGU24-8760
|
ECS
|
On-site presentation
Mantle Oxidation Driven by the Redox Dynamics of the Mariana-Type Subduction
Wenyong Duan et al.
12:26–12:30
Discussion
Lunch break
Chairpersons: Jeroen van Hunen, Ágnes Király, Taras Gerya
EGU24-1044
|
ECS
|
On-site presentation
The role of hydration-induced processes in the deformation of the North China craton
Açelya Ballı Çetiner et al.
EGU24-16410
|
ECS
|
Highlight
|
On-site presentation
H2 formation in subduction zone
Alexis Gauthier et al.
EGU24-8282
|
ECS
|
Highlight
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On-site presentation
A twisted ribbon of subducted lithosphere beneath southeast Anatolia and its seismotectonic implications
Sonia Yeung et al.
EGU24-10304
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On-site presentation
Dynamics of subducting slabs and origin of deep-focus earthquakes
Hana Čížková et al.
EGU24-10800
|
ECS
|
On-site presentation
Gravimetric signature of subducted slabs’ deep thermal structures.
Xavier Vergeron et al.
15:30–15:45
Discussion
Coffee break
Chairpersons: Ágnes Király, Oğuz H Göğüş, Jeroen van Hunen
EGU24-14820
|
On-site presentation
Subduction dynamics and overriding plate deformation
Wouter P. Schellart
EGU24-5274
|
ECS
|
On-site presentation
Investigating the plate motion of the Adriatic microplate by 3D thermomechanical modelling
Christian Schuler et al.
EGU24-6689
|
On-site presentation
Hoop Stresses in Free Subduction on a Sphere
Neil Ribe et al.
17:45–18:00
Discussion

Posters on site: Thu, 18 Apr, 16:15–18:00 | Hall X2

Display time: Thu, 18 Apr 14:00–Thu, 18 Apr 18:00
Chairpersons: Ágnes Király, César R. Ranero, Jeroen van Hunen
EGU24-8783
|
OSPP
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On-site presentation
Unveiling parental compositions in Andean-type intrusions through magma mingling zones
Daniel Gómez Frutos and Antonio Castro
EGU24-568
|
ECS
|
OSPP
|
On-site presentation
Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?
Nikola Stanković et al.
EGU24-14498
|
ECS
|
On-site presentation
Numerical modelling of dynamic fluid-rock reactions in subduction settings
Kevin Wong et al.
EGU24-6602
|
On-site presentation
Is mantle transition zone a water reservoir? Yes, but only transient
Taras Gerya
EGU24-3010
|
ECS
|
On-site presentation
Thermo-mechanical models on the missing forearc basement in Taiwan
Chih-Hsin Chen et al.
EGU24-15924
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On-site presentation
The Mussau Ridge and Trench – news from an infant subduction zone
Philipp Brandl et al.
EGU24-8053
|
Highlight
|
On-site presentation
Gibraltar subduction zone is invading the Atlantic
Joao C. Duarte et al.
EGU24-20684
|
ECS
|
On-site presentation
Subduction polarity reversal facilitated by plate coupling during arc-continent collision
Zaili Tao and Jiyuan Yin
EGU24-1065
|
ECS
|
OSPP
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On-site presentation
Unravelling Inter-slab Interactions in Double Subduction Systems: Insights from Dynamic Models
Gouri Sankar Mukherjee et al.
EGU24-12008
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ECS
|
On-site presentation
On The Timing of Collision Induced Slab Break-Off and Polarity Reversal
Erkan Gün et al.
EGU24-19667
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ECS
|
OSPP
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On-site presentation
Dynamical evolution of forearc subsidence controlled by slab geometry
Francisco Bolrão and Wouter Schellart
EGU24-18579
|
ECS
|
OSPP
|
On-site presentation
Complex subduction and mantle dynamics induced by along-strike variations in overriding plate structure
Pedro José Gea Jódar et al.
EGU24-19465
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On-site presentation
Parametric study for self-sustained Andean-type subduction speed
Jamison Assunção et al.

Posters virtual: Thu, 18 Apr, 14:00–15:45 | vHall X2

Display time: Thu, 18 Apr 08:30–Thu, 18 Apr 18:00
Chairpersons: Oğuz H Göğüş, Taras Gerya