The Variscan orogeny shaped the basement of a large part of the European continent during the assembly of Gondwana, Laurussia and Armorica from Silurian to Permian. Present-day outcrops of Variscan lower-middle-upper crust provide insight into the fundamentals of a wealth of magmatic and metamorphic processes that allow to reconstruct the conditions during the formation of the Variscan crust, as well as the mechanisms and timescales of the orogenic and post-orogenic dynamics (plutonism, volcanism, metamorphism and exhumation). We invite contributions covering all aspects of these complex geological processes.
Keynote: Stanislaw Mazur, Polish Academy of Sciences, Warsaw, "The shape of the Variscan Belt in Central Europe: Strike-slip tectonics versus oroclinal bending"

Public information:
Dear colleague participants to session GMPV11.1,

You can find the list of displays of our session at this link:
https://meetingorganizer.copernicus.org/EGU2020/displays/35182

Please note that the session formate is a live, text-based chat. It starts on Monday 04.05.2020; 14:00 - 15:45.

Some EGU blogs you may find useful while preparing your presentation materials and participation in the chat:
https://blogs.egu.eu/geolog/2020/04/08/shareegu20-uploading-your-materials-a-webinar-and-walkthrough/
https://blogs.egu.eu/geolog/2020/04/10/shareegu20-presentation-material-format-and-copyright-questions/
https://blogs.egu.eu/geolog/2020/04/01/shareegu20-planning-your-week-of-digital-interaction/

We are looking forward to the online discussions!

With best regards,
Urs Schaltegger (Urs. Schaltegger@unige.ch)
Marion Tichomirowa (tichomir@mineral.tu-freiberg.de)
Jana Kotkova (jana.kotkova@geology.cz)

The Alpine-Himalayan orogenic belt is one of the largest and most prominent suture zones on Earth. The belt ranges from the Mediterranean in the west to Indonesia in the east. It results from the subduction and closing of different branches of the Tethyan Oceanic Realm and the subsequent collision of the African, Arabian and Indian continental plates with Eurasia. Its long-lasting geological record of complex interactions among major and smaller plates, featuring the presence of subduction zones at different evolutionary stages, has progressively grown as a comprehensive test site to investigate fundamental plate tectonics and geodynamic processes with multi-disciplinary studies. Advances in a variety of geophysical and geological fields provide a rich and growing set of constraints on the crust-lithosphere and mantle structure, as well as tectonics and geodynamic evolution of the entire mountain belt

We welcome contributions presenting new insights and observations derived from different perspectives like geology (stratigraphy, petrology, geochronology, geochemistry, tectonics and geomorphology), geophysics (seismicity, seismic imaging, seismic anisotropy, gravity), geodesy (GPS, InSAR), modelling (numerical and analogue), risk assessment (earthquake, volcanism), as well as from multi-disciplinary studies.

Keynote presentation by Boris Kaus (University of Mainz)

Public information:
The discussion during the chat sessions will follow an order based on location (from East to West), and divide the abstracts such that in the first block we will go from the Himalaya region to Turkey-Anatolia-Cyprus and the East Mediterranean Basin, and in the second block, we will cover the Mediterranean from the Western side of the Black Sea (i.e. Bulgaria) to the Westernmost Mediterranean. The preliminary order (hoping that authors upload their display) is:
14:00-15:45
1· Jatupohnkhongchai et al.
2· Bai et al.
3· Chen et al.

4· Knight et al.
5· Stoner et al.
6· Wei Li et al.

7· Barbero et al.
8 Lom et al.
9· Simmonds et al.
10· Mahleqa Rezaei et al.

11· Sağlam et al.
12· Mueller et al.
13· Gürer et al.
14· Nirrengarten et al.

BREAK (30 minutes)

16:15-18:00
1· de Leeuw et al.
2· Balkanska and Georgiev (?)

3· Faucher et al.
4· Molnár et al.
5· Stanković et al.

6· Schneider and Balen
7· Chang et al.
8· Kaus et al.
9· El-Sharkawy et al.
10· Agostini et al.

11· Gimeno et al.
12· de la Peña et al.
13· Negredo et al.
14· Jiménez-Munt et al.
15· Kumar et al.

The Arctic realm hosts vast extended continental shelves bordering old land masses, one of the largest submarine Large Igneous Provinces (LIPs) -the Alpha-Mendeleev Ridge - of Mesozoic age, and the slowest mid-ocean spreading ridge (the Gakkel Ridge) on the globe. Extreme variations in the evolution of landscapes and geology reflect the tug-of-war between the formation of new oceans, like the North Atlantic, and the destruction of older oceans: the South Anyui, Angayucham and North Pacific, which were accompanied by rifting, collision, uplift and subsidence. The causal relationships between the deep-mantle and surface processes in the Circum-Arcic region remain unclear. Geoscientific information on the relationship between the onshore geology and offshore ridges and basins in combination with variations in the mantle is the key for any deeper understanding of the entire Arctic Ocean.
This session provides a forum for discussions of a variety of problems linked to the Circum-Arctic geodynamics and aims to bring together a diversity of sub-disciplines including plate tectonics, mantle tomography, seismology, geodynamic modelling, igneous and structural geology, geophysical imaging, sedimentology, and geochemistry. Particularly encouraged are papers that address lithospheric-mantle interactions in the North Atlantic, the Arctic and North Pacific regions, mantle dynamics and vertical and horizontal motion of crustal blocks and consequences for paleogeography. As geologic and tectonic models are inherently tied with changes in the oceanographic and climatic development of the Arctic, we also invite studies that focus on the interplay between these processes and across timescales. Lastly, we would like to invite contributions from studies concerning the implications of how the Arctic’s geography and geology are portrayed by modern data and issues related to jurisdiction and sovereign rights with particular focus on the UN Convention on the Law of the Sea.

The separation of the African and Arabian plates is responsible for the opening of the Red Sea and Gulf of Aden that meet the East African Rift at the Afar triple junction. Moreover, the strike-slip movement between the African and the Arabian plates is accommodated in the northernmost part of the rift system by the Dead Sea fault and its marine extension in the Gulf of Aqaba. High volcanic and seismic activity in and around the three arms of the divergence highlights some of the key aspects of this opening system.

This complex geodynamic system is currently investigated by multiple geoscientific approaches including e.g., tectonics, volcanology, stratigraphy, geodynamics, geodesy as well as active and passive geophysical methods.

In this session, we welcome contributions that are based on (but not limited to) such methods and investigate the basins of the Gulf of Suez, Gulf of Aqaba, Red Sea, Gulf of Aden, Afar depression and their surrounding regions, from the mantle to the crust.