[Geodynamics] EGU 2019 session highlights in plate tectonics, plate-mantle interaction and the evolution of rifts, margins and sedimentary basins

[Dietmar Muller]

Dear Colleagues,

I would like to alert you to the following EGU 2019 session highlights in plate tectonics, plate-mantle interaction and the evolution of rifts, margins and sedimentary basins

GD3.2/GMPV2.9/NP9.11/SM4.17/SSP2.22/TS9.7 The drivers and consequences of plate-mantle system dynamics and evolution
https://protect-au.mimecast.com/s/U0ZMCmOxDQtMVKnqTG4L4p?domain=meetingorganizer.copernicus.org
Conveners: Dietmar Müller, Suzanne Atkins, Tiffany Barry, Alan Collins , Andrew Merdith
Plate tectonics and mantle dynamics are the key processes controlling the exchange of fluids and volatiles between Earth's deep interior and its surface, with most exchanges occurring at plate boundaries. This session if focussed on unravelling the role that these fundamental geodynamical processes play in modulating Earth's geochemical cycles, atmospheric and ocean chemistry and climate. Questions that might be addressed include: What causes major perturbations in the equilibrium between tectonic plate motion and the ductile deep interior of the planet? How is the periodic amalgamation of continental lithosphere to form supercontinents related to mantle convection patterns? Is there a “supercontinent cycle” or is there merely a continuum of progressive processes involving many successive collisions and breakup events, without all continental lithosphere ever being assembled into one continent? How can we assimilate clues from the basin sedimentary record, from rift, subduction, and intraplate volcanism into plate-mantle models? How is the punctuated evolution of the plate-mantle system related to geochemical cycles and to surface environmental crises? For this session we welcome abstracts on any aspect of the nature and evolution of tectonic plates and the plate-mantle system, as well as their connection to the evolution of the Earth’s crust and its surface. We also invite contributions on using geophysical and geological observations to constrain plate-mantle interaction through time, including intraplate volcanism.

GD2.2/GM4.8/TS9.10 Move-On: “Models and Observations of Vertical Material Flow influencing the asthenosphere and lithosphere”
https://protect-au.mimecast.com/s/-xpDCnxyErCW4qoVTJFZqs?domain=meetingorganizer.copernicus.org
Conveners: Ulrich Anton Glasmacher, Hans-Peter Bunge, Anke Friedrich, Barbara Romanowicz
Since the 1960´s, one commonly accepts plate tectonics as an expression of the earth's convecting mantle, yet numerous geological features in continental interiors and at some plate margins remained unexplained. The plume-driven vertical material flow in the non-lithospheric mantle serves as a physical model to explain such features (uplifting domes, flood basalts, dike swarms, narrow grabens, broad rifting, etc.) independently of, but in addition to the plate-mode. The general aim of the session is to present and discuss the state-of-the art of the plume mode of mantle convection, its influence on the dynamics of the asthenosphere and the lithosphere, as well as its expression at the earth’s surface. For this interdisciplinary session, we seek contributions from natural case studies (tectonic evolution-sedimentology-thermochronology-geophysics-seismology-palaeoclimate) and from geo-dynamic or geomaterials-oriented (analog and numerical) modeling, which address the interplay of deep mantle – asthenosphere – lithosphere – basin – surface processes in all plate environments. We will greatly appreciate all geoscientific studies that contribute to the feedback processes causing the evolution of dynamic topography.

TS6.4/GD5.7/GMPV7.26/SM1.25/SSP3.30 Breaking and moving plates apart: linking plate kinematics to lithospheric processes and paleogeography
https://protect-au.mimecast.com/s/2pXACoVzGQiwALzmsVbxXG?domain=meetingorganizer.copernicus.org
Conveners: Gianluca Frasca, Christopher Jackson , Marta Pérez-Gussinyé , Joanne Whittaker, Simon Williams
What controls lithosphere evolution during extension? Is lithosphere extension linked to palaeo-oceanography and biogeochemical cycles? The aim of this session is to investigate diverging systems over a wide range of spatial and temporal scales, and at all stages in the life cycle of divergent plate boundaries including continental rifting, mantle exhumation and seafloor spreading.
A special emphasis will be given to (1) studies that couple lithospheric deformation models to plate kinematics, and that integrate possibly the role of serpentinisation and/or magmatism in the models. (2) paleogeographic reconstructions revealing the influence of sedimentation and lithosphere structure evolution on biogeochemical cycles and oceanographic circulation at regional and global scales. (3) contributions that elucidate extensional modes through the interplay between tectonic structures, magmatism and the stratigraphic record using field, petrological and seismic data and that aim at a better understanding of distinctive plate kinematic settings.

TS6.5/GD5.8/GMPV7.9 Volcanic versus non-volcanic rifts and passive margins, from rift to ridge
https://protect-au.mimecast.com/s/KBbfCp8AJQtwgN8ZsGajQV?domain=meetingorganizer.copernicus.org
Convener: Ritske S. Huismans, Romain Beucher , Sara Moron-Pollanco , Delphine Rouby , Magdalena Scheck-Wenderoth
New observations and modeling allow us to investigate the underlying processes responsible for volcanic and non-volcanic rift and passive margin formation. Key questions to be resolved include 1) what controls the amount and distribution of magmatism during volcanic to non-volcanic rift and passive margin formation. 2) How does magmatism impact the tectonic evolution of these systems and what are the structural and rheological controls of magmatism and feedbacks on tectonic deformation. 3) How are structural style of passive margin formation and magmatism linked? 4) What are the consequences of magmatic versus a-magmatic systems for the associated sedimentary basins? 5) What is the depositional environment for formation of seaward dipping reflector sequences and which processes control anomalous vertical motions during basin evolution? We encourage abstracts that offer new insights into processes underlying volcanic and non volcanic rift-passive margin formation from rift to ridge, using constraints from observations and modeling.

TS6.1/GD5.6/GMPV2.12/SM1.24 Continental Rift Evolution: Tectonics, Topography, Transients
https://protect-au.mimecast.com/s/n3PICq7BKYt2gP5viNfdye?domain=meetingorganizer.copernicus.org
Conveners: Sascha Brune, Carmen Gaina, Corti Giacomo, Nick Kusznir
Continental rifting is a multi-facetted process spanning from the inception of extension to continental rupture or the formation of a failed rift. This session aims at combining new data sets, concepts and techniques elucidating the structure and dynamics of rifts and rifted margins. We invite submissions highlighting the time-dependent evolution of processes such as initiation of faults and ductile shear zones, tectono-magmatic and sedimentary history, lithospheric necking and rift strength loss, influence of the pre-rift lithospheric structure, mantle dynamics and associated effects on rifting processes, as well as continental break-up and the transition to sea-floor spreading. We encourage contributions using multi-disciplinary and innovative methods from field geology, geochronology, seismology, geodesy, marine geophysics, plate reconstruction, or modeling. Focus regions may include but are not limited to the Atlantic, Indian Ocean, Mediterranean and South China Sea (e.g. IODP 367/368 area) rifted margins, or the East African, Eger, Baikal and Gulf of California rift systems. Special emphasis will be given to presentations that provide an integrated picture by combining results from active rifts, passive margins, failed rift arms or by bridging the temporal and spatial scales associated with rifting.

SSP3.4 Understanding Source-to-Sink Systems from a Process-Based Perspective
https://protect-au.mimecast.com/s/KfdjCr8DLRtmy0vOsNBY3p?domain=meetingorganizer.copernicus.org
Conveners: Sara Morón, Mike Blum, William Helland-Hansen, Björn Nyberg, Tor Sømme
This session seeks to explore current research into sediment dispersal systems from a process-based and quantitative source-to-sink perspective. The study of source-to-sink systems relates long-term variations in sediment flux from source terrains to the morphological and stratigraphic evolution of depositional systems. These variations can reflect allogenic controls and/or autogenic self-organization over a wide range of time scales. Earth’s modern source-to-sink systems are becoming increasingly well characterized due to the proliferation and analysis of big data by academic researchers and industry scientists. Moreover, much progress has also been made transforming these insights into the potential for quantitative and predictive insights into the ancient stratigraphic record, but this remains a major challenge that requires integration of field data, numerical models, and experimental results. We invite contributions based on observation of field and remotely-sensed data as well as analogue and numerical modelling. We aim to cover a large range of autogenic and allogenic forcing mechanisms that operate on multiple time scales from the significance of individual transport events to the large-scale filling of sedimentary basins.

And For Deep Carbon Observatory fans:
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TS9.1/GD5.14/GMPV2.11 Plate tectonics as a driver of geochemical fluxes
https://protect-au.mimecast.com/s/NrppCvl0PoClJj6ZSykemf?domain=meetingorganizer.copernicus.org
Conveners: Dietmar Müller, Marie Edmonds, Tobias Keller, Marie-Laure Pons
Over geological time spans, plate tectonics is the key process controlling the exchanges of fluids and volatiles between Earth's deep and shallow reservoirs, and these exchanges mostly occur along plate boundaries. Understanding these processes is the key to unravelling the role plate tectonics plays in modulating Earth's geochemical cycles, atmospheric and ocean chemistry and climate. For this session we invite abstracts on any topic from monitoring and analysing tectonic, volcanic and metamorphic processes along plate boundaries, to topics focussed on modelling elemental fluxes along mid-ocean ridges and subduction zones through geological time. In addition, we invite contributions on the role of intraplate volcanism in this context. We also welcome abstracts on modelling regional or global geochemical cycles, particularly the deep carbon cycle, with a focus on connections with plate tectonics and geodynamics.

The abstract deadline is 10 Jan 2019, 1300 CET, with abstract submission information available here: https://protect-au.mimecast.com/s/oMWbCwVLQmiN5z1nfQM6-7?domain=egu2019.eu<https://protect-au.mimecast.com/s/oMWbCwVLQmiN5z1nfQM6-7?domain=egu2019.eu>

Looking forward to seeing you in Vienna next year!

Best,
Dietmar


DIETMAR MÜLLER
Professor of Geophysics
Director, ARC Basin Genesis Hub<https://protect-au.mimecast.com/s/F0xcCxnMRvtXp4AjhAZsvt?domain=earthbyte.org>
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