Dear all,

We cordially invite you to contribute to our session GMPV2.2 Plutonic to volcanic records of deep magmatic processes: integrated studies of magma differentiation at the crustal-mantle boundary level

https://meetingorganizer.copernicus.org/EGU23/session/45170

 ABSTRACTS SUBMISSION DEADLINE: 10th January 2023

 Chemical differentiation of mantle-derived magmas involves a spectrum of processes (e.g., fractional crystallization, magma mixing and mingling, rock assimilation, melt-rock and melt-crystal mush reactions) that regulate composition, volatile content, physical-chemical properties and mobility of melt. However, understanding the effectiveness of these processes at depths of upper mantle - lower continental crust as well as quantifying their influence during the differentiation, is still a major challenge. Magma transport through upper mantle and lower crust leads to the interaction between magma and wall-rocks, including phenomena such as mantle metasomatism, mineral-melt reaction, mineral dissolution in magma, crustal wall-rock partial melting. Different factors (e.g., pressure, fO2, magma and wall-rock compositions, volatile content in melt) provide a fundamental control on the effects of magma-rock interaction. Moreover, the final rock composition is also influenced by the degree of equilibrium reached between magma and rock-forming minerals, that preserve evidence of equilibrium/disequilibrium in their textures and compositions.

Theoretical, numerical, and laboratory experimental approaches based on natural samples are combined to shed light on this research topic, defining kinetic, thermodynamic and compositional effects of magma-rock interaction at deep levels within the Earth’s crust. This session invites contributions regarding exchange/assimilation reactions between magma and deep crustal rocks, nucleation/growth and reabsorption of crystals, effects of crystallization kinetics on mineral chemistry as well as partitioning of trace elements between crystals and melts during high-pressure interaction processes. We particularly encourage submissions on experimental petrology, thermodynamic and geochemical modelling, as well as on field studies.

The EGU General Assembly 2023 (23-28 April) is announced as a hybrid event, we look forward to your contributions and hope to see you in Vienna or online.

Best regards,
Barbara Bonechi on behalf of all conveners

Conveners:

Flavia Palummo (Sapienza University of Rome)                                                                                        Barbara Bonechi (The University of Manchester)
Cristina Perinelli (Sapienza University of Rome)
Alessandro Fabbrizio (Charles University of Prague)

Dear colleagues,

We cordially invite you to contribute to our three-sessions day on radioactive waste disposal at the upcoming EGU 2023 in Vienna.

Nowadays, there is international consensus that the disposal of high-level radioactive waste in deep geologic formations is the appropriate management solution for such materials as well as for other, particularly for long-lived, radioactive waste. Geologic, or “deep”, disposal of radioactive waste is a challenge particularly, but not only, for geoscientists. Geoscience has to be connected with engineering, and disposal projects have to be implemented in a sometimes challenging societal environment. Disposal sites have to be selected and characterised based on sound geologic expertise and in a way allowing for appropriate (geo-)technical concepts to be implemented and accounting for the relevant political, legal and other societal conditions. Safety has to be demonstrated by means of assessments utilizing geoscientific and technical information and data. In other words, both excellent geoscience and a well-founded interdisciplinary perspective are needed.
In order to provide a platform for scientific exchange on the different aspects of this issue, a series of three sessions at the 2023 General Assembly of the European Geosciences Union (Vienna, Austria & Online, 23–28 April 2023, https://www.egu23.eu/), has been developed by three interdisciplinary and international teams:

•      “Deep Geological Disposal – Geosciences behind regulatory, technical and social challenges: best practices and lessons learned” (https://meetingorganizer.copernicus.org/EGU23/session/46433)
  

•      “Deep Geological Repositories – characterization of barrier materials and assessment of barrier integrity” (https://meetingorganizer.copernicus.org/EGU23/session/46428)
  

•      “Geological Repositories – Geosciences in the assessment of radionuclide migration and long-term evolution of the geosphere” (https://meetingorganizer.copernicus.org/EGU23/session/46432)
  

The sessions will be held in connection and build upon each other. We – the conveners and co-conveners – strongly encourage geo- and other scientists working on disposal or related issues to submit abstracts for these sessions. Please note that abstract submission deadline is January 10!
We are looking forward to meeting you in Vienna and having fruitful exchanges on a challenging but highly interesting topic.

On behalf of the conveners

Axel Liebscher