Public information:
Public information:
The GMPV division business meeting is THE place for the GMPV community to discuss matters related to EGU's Division of Geochemistry, Mineralogy, Petrology and Volcanology. During the meeting we will present and discuss:

- The development of Sharing Geosciences Online, with up-to-date statistics
– Congratulations for the 2020 medallists and the 2019 OSPP awardees
- Introducing our Science Officers
- Early Career Scientists & Outreach
- Bunsen Medal committee
– mentoring ECS members
- Publication: Solid Earth
- Governance review
- General discussion and feedback

Please send further suggestions to gmpv@egu.eu

Triple oxygen isotope measurements (16O/17O/18O) in O-bearing compounds have become an important part of the geochemical toolkit over the past two decades, influencing various fields such as atmospheric chemistry, meteorites and planetary science, hydrology, paleoclimatology, atmospheric evolution and forensic studies, among other promising applications. This session invites contributions using the 16O/17O/18O isotope system to study modern- and paleo- O-bearing materials, including (but not limited to) waters, ice, sulphates, nitrates, perchlorates, carbonates and silicates. Contributions are welcomed that address analytical methods, theoretical predictions (models), and empirical observations of 16O/17O/18O in water (ice, liquid, vapour) and minerals, with special focus on applications. Presentations discussing technical limitations, analytical improvements, standardization and calibrations to understand kinetic and equilibrium fractionation of 16O/17O/18O are also encouraged. An important goal is to bring together researchers engaged in this field to discuss analytical error, reference materials, reporting of triple oxygen isotope measurements and emerging applications.

The second half of twentieth century has seen some of the most important developments in chemical analysis in geology and geochemistry. Based on the well-known physical rules that drive the behavior of particles and rays, recent technological advances have created opportunities for new developments based on microbeams : Electrons, ions, protons, neutrons, X-rays, IR to UV lights including laser. This session invites contributions describing and applying the latest developments in Electron Probe Micro Analyzer (EPMA), Scanning Electron Microscopy (SEM), Secondary Ion Mass Spectrometry (SIMS), Proton-Induced X-ray Emission (PIXE), Laser Ablation – Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS), Raman and Infrared spectrometry, synchrotron based technics and others, in the contest of geological materials.

We encourage contributions that highlight new protocols and technical improvements, as well as original works based on the combination of different techniques.

One of the major challenges in the study of geological processes occurring in the Earth’s crust and mantle derives from the impossibility of direct access to these portions. However, recent methodological and technological advances have improved our capability to observe and quantify the fingerprints of geological processes at much finer spatial and temporal resolutions. Microstructures within igneous, metamorphic, and deformed rocks are archives preserving abundant information about processes occurring throughout the crust and the mantle, such as mantle melting and metasomatism, heating and cooling events, fluid mobility, the timing and location of nucleation and crystal growth, mechanisms and timing of deformation, fluid dynamical behaviour during magma crystallization.

The study of microstructure provides direct information on the history and timescales of geological processes, allowing the development of chemically- and physically-based models of deep and surface processes acting under equilibrium and disequilibrium conditions. They provide fundamental piece of information for short- and long-term eruption forecasting, planetary evolution, crustal differentiation, deformation, and exhumation, and global volatile cycling.

The Big Fat Session of the Year focuses on the study of microstructures sensu lato covering the entire range of igneous and metamorphic petrology in various tectonic settings. Contributions in this session will include new applications of well-established techniques, showcase development of new microstructural and analytical techniques, careful sample characterization from micro- to macroscopic scale prior to textural, chemical and isotopic analyses. We present multidisciplinary studies focused on linking quantitative datasets to field and geophysical observations challenging the difficulties related to processes marked by strong disequilibrium.

Public information:
17 scientists declared that they will participate in the GMPV1.4 chat planned on Friday, 8 May, from 14.00 to 15.45. We plan that after short introduction from the convener each of the listed authors will type short introduction highlighting the most important results of her/his study, and there will be short time (6-8 minutes) for questions and comments from chat participants. The displays should be presented in the following sequence:

Introduction from the Conveners
Penny Wieser
Lütfiye Akin
Sofia Vorobey
Andres Libardo Sandoval-Velasquez
Hugo van Schrojenstein Lantman
Francesca Piccoli
Bernardo Cesare
Marnie Forster
Emmanuelle Ricchi
Evgeny Limanov
Igor Villa
Silvio Ferrero
Kira Musiyachenko
Benoit Dubacq
José Alberto Padrón-Navarta
Anna Redina
Filippo Carboni
Andrea Luca Rizzo
Sarah Lang
Georg Löwe

At the end, we will use spare time for questions that attendees had no time to ask in the thread.

This session concerns about the interrelation between microstructures and geologic processes. One the one hand, microstructures (fabrics, textures, grain sizes, shapes, etc) can be used to identify or quantify, e.g., deformation, metamorphic, magmatic or diagenetic phenomena (to name a few). On the other hand, physical properties of geo-materials are governed by their microstructure, hence predicting a materials property is greatly enhanced by understanding of how certain processes result in a specific microstructure.

All these mechanisms are likely to cause modification on the rheological, elastic, and thermal properties of these rocks, providing key information on the evolution of the lithosphere.
In this session, we invite contributions from field observations, laboratory experiments, and numerical modelling that relate microstructures to rheology, strain localization or mineral reactions, that use microstructures to tackle general problems in structural, metamorphic, magmatic or economic geology as well as studies quantifying physical and mechanical properties of rocks based on their microstructural and textural properties using well established or novel methods.

Natural fluids mainly escape from the Earth interior in volcanoes and active seismic regions. New attention is recently posed to the quiescent volcanoes since multidisciplinary investigations showed that magma accumulations at depth coupled to high degassing of volatiles still occurs after long time from the last activity highlighting a risk of reactivation after long phases of inactivity. Furthermore, magma accumulations in regions far from volcanism have an active role in seismicity, in fact magma and its volatiles can lubricate faults and generate overpressure in crustal layers.
Fluids have a key role in processes that generate volcanic activity and earthquakes; they transfer messages to the surface about how the natural systems work. The geochemical monitoring allows recognizing these natural processes and their evolution over time. Recently geochemical observations are supported by the advances of technology that also permit to measure at high frequency geochemical parameters in site. Furthermore new experimental works are producing constrains about the origin and migration of fluids and their behavior during rock deformation.
We are approaching an interesting phase where the geochemistry can actively interact in a multidisciplinary context for investigating natural processes. Great interest is towards the use of the new technologies and methods to solve for complex analytical challenges in geochemical investigations and monitoring of volcanoes and seismic regions. Their use coupled to the basic models of rock-fluids interactions and experiments of fluids generation/migration is contributing to improve the understanding of these natural processes, providing fundamental constrains for monitoring.
We welcome abstracts from various backgrounds, including researchers using traditional and non-traditional geochemical tracers, noble gases, stable isotopes and water chemistry. We wish that this session will be of broad interest to researchers studying hydro-geochemistry, isotope geochemistry, volcanic degassing etc. This will lead to a session that reflects a cross-section of researchers who apply these tracers to the monitoring of volcanoes and seismic activity. We hope in this way to highlight the potential scientific advances available through the combination of these complementary areas of study and specific techniques, and to encourage future collaborative efforts to resolve the many outstanding questions in volcanic and seismically active systems.

The powerful combination of high-resolution geochronological data, innovative isotopic geochemistry and petro-structural analysis is continuously progressing our understanding of geological processes within the Earth's dynamic lithosphere. Moreover, the development of new techniques and improvement of analytical equipment inspire future progress and development.
This session aims to highlight multiscale and multi-disciplinary approaches to the use of radiogenic isotopes in unravelling duration and mechanisms of geological processes in different environments. Particularly we welcome contributions in which geochronology is coupled with petrology, major, trace elements and isotope geochemistry, phase equilibrium modelling, and structural geology.

The Earth’s interior is a hidden and significant water reservoir on a par with the hydrosphere. The properties and processes of the crust and the mantle are strongly modulated by the storage and transport of water. Despite significant progress made in the research of deep water cycle over the past three decades, important scientific challenges still remain. How much water is down there? How heterogeneously is water distributed on different spatial scales? Where did water originate? How has water been exchanged between external and internal reservoirs of the Earth through geological time? How significant, quantitatively, is the role of water in facilitating mantle convection and melting? What is the function of water in ore formation, deep earthquakes, and volcanic eruptions? We invite contributions from experimental, computational, analytical, petrological-geochemical and geophysical studies that progress on all aspects of water as a vital element of global geodynamics.

Geophysical data demonstrate elevated seismic activity in subduction zones. Here dehydration and fluid pressure cycling as a function of increasing compaction and metamorphic grade are closely linked to deformation over a multitude of spatial and time scales. The highly anisotropic and initially fluid saturated marine sediments and altered oceanic crust dehydrate, while being incorporated into the accretionary wedge and subducted under the upper plate. Under high tectonic stresses, fluid overpressure eventually results in mechanical instabilities, promoting either hydrofracturing or ductile failure giving way for fluids to circulate. Collection of these fluids at the micron-scale and propagation along pathways up to the deca-kilometre scale are probably in charge for phenomena such as episodic tremor and slow slip. Increasing evidence from geophysical and seismic studies suggest that accumulation of slow slip events and fluids may even trigger devastating high-energy megathrust earthquakes. Quantitative understanding about (i) the release of fluids from their host rocks, (ii) the effect of localisation of both fluid flow and deformation and (iii) their effect on seismic activity are therefore crucial to understand the complex feedback processes. This system can only be fully understood by a close collaboration between experts from structural geology, metamorphic petrology and geophysics. In this interdisciplinary session, we therefore invite contributions from natural, experimental- and numerical modelling-based studies focussing on both exhumed (paleo) and active subduction zones.

Subduction zones are arguably the most important geological features of our planet, where plates plunge into the deep, metamorphic reactions take place, large earthquakes happen and melting induces volcanism and creation of continental crust. None of these processes would be possible without the cycling of volatiles, and this session aims to explore their role in convergent margins. Questions to address include the following. Do Atlantic and Pacific subduction zones cycle volatiles in different ways? What dynamic or chemical roles are played by subducted fracture zones and plate bending faults? How do fluids and melts interact with the mantle wedge and overlying lithosphere? Why do some of the Earth’s largest mineral resources form in subduction settings? We aim to bring together geodynamicists, geochemists, petrologists, seismologists, mineral and rock physicists, and structural geologists to understand how plate hydration/slab dynamics/dehydration, and subsequent mantle wedge melting/fluid percolation, and ultimately melt segregation/accumulation lead to the diverse range of phenomena observed at convergence zones around the globe.

Includes Augustus Love Medal by Harro Schmeling
Invited Speaker: Nestor Cerpa (University of Montpellier, France)

Subduction drives plate tectonics, generating the major proportion of subaerial volcanism, releasing >90% seismic moment magnitude, forming continents, and recycling lithosphere. Therefore, it is 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.

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.

Continental rifting is a complex process spanning from the inception of extension to continental rupture or the formation of a failed rift. This session aims at combining new data, 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 and growth of faults and ductile shear zones, tectonic and sedimentary history, magma migration, storage and volcanism, lithospheric necking and rift strength loss, influence of the pre-rift lithospheric structure, rift kinematics and plate motion, mantle flow and dynamic topography, as well as break-up and the transition to sea-floor spreading. We encourage contributions using multi-disciplinary and innovative methods from field geology, geochronology, geochemistry, petrology, seismology, geodesy, marine geophysics, plate reconstruction, or numerical or analogue modelling. 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.

Public information:
Dear participants of EGU session GD6.3 on rifting

We will start the discussion at 10:45 CET on Friday 8 May, and it will last until 12:30 CET, although the chat will remain active for 30 min more.

This is how we plan to carry on the session:

· Every contribution will get about 5 minutes of discussion
· The conveners will introduce the contribution (title, authors,..)
· The presenting authors will give a short summary/introduction (2-3 sentences) of their work and contact details for potential further discussion (@ authors, please prepare these in advance to ensure a smooth transition).
· Discussion with participants

If time permits, we will have a more general discussion after all contributions have been presented.

Here’s the order of the presentations:

· Tortelli et al.
· Welford & Geng
· Phillips & McCaffrey
· Pan et al.
· Glerum & Brune
· Braschi et al.
· Bauer et al.
· Pagli et al.
· La Rosa et al.
· Keir et al.
· King et al.
· Lymer et al.
· Yang & Welford
· Chenin et al.
· Forzese et al.
· Frasca et al.

Processes responsible for formation and development of the early Earth (> 2500Ma) are not
well understood and strongly debated, reflecting in part the poorly preserved, altered, and
incomplete nature of the geological record from this time.
In this session we encourage the presentation of new approaches and models for the development of Earth's early crust and mantle and their methods of interaction. We encourage contributions from the study of the preserved rock archive as well as geodynamic models of crustal and mantle dynamics so as to better understand the genesis and evolution of continental crust and the stabilization of cratons.
We invite abstracts from a large range of disciplines including geodynamics, geology, geochemistry, and petrology but also studies of early atmosphere, biosphere and early life relevant to this period of Earth history.

Dynamic processes shape the Earth and other planets throughout their history. Geochemical observations place major constraints on dynamical processes that operated throughout Earth’s history while seismic imaging gives a snapshot of today’s mantle. Knowledge of physical properties and rheology from mineral physics is key to quantify processes in the mantle, and is undergoing constant advances (e.g. related to the iron spin transition or the thermal conductivity of the core). Magma ocean crystallisation established the initial conditions for subsequent long-term Earth evolution but is not well understood and typically not considered in models of long-term evolution. Modern-day plate tectonics may not have operated in the past; there is active debate about what tectonic mode(s) may have preceded it and their geological and geochemical signatures.

This session aims to provide a multidisciplinary view of the dynamics and evolution of the Earth, including its mantle, lithosphere, core and atmosphere. We welcome contributions that address aspects of this problem including geochemical observations and their interpretation, new mineral physics findings, geodynamical modelling, and seismological observations, on temporal scales ranging from the present day to billions of years, and on spatial scales ranging from microscopic mineralogical samples to global models. Contributions that take a multidisciplinary approach are particularly welcome.

Invited speaker: Matthew Jackson, Saskia Goes, Lorenzo Colli, Paula Koelemeijer

Earth’s continental crust is a unique phenomenon among the known solar objects and its formation is fundamentally entwined with the evolution of our planet. The withdrawal of large volumes of granitic magma from the deep continental crust and its emplacement at higher structural levels has enriched the upper crust in incompatible and heat-producing elements, leaving the lower crust relatively mafic and refractory.
However, the mechanisms of how continental crust is formed and recycled and how these processes changed over Earth history remain highly debated.
What has been the rate of generation and growth of the continental crust through time? What has been the contribution to crustal growth from continental flood basalt provinces? What caused the diversification of granitoid rocks in the late Archean? What is the role of fractional crystallization in making intermediated to felsic rocks and the continental crust?
We invite abstracts that use geochemical methods to discuss questions related to the formation and evolution of the continental crust in the modern and in the past. Preference will be given to studies that address these topics by applying novel isotope systematics, a petrochronological approach and innovative techniques.

Solicited speaker: Oliver Jagoutz, MIT

The nature of Earth’s lithospheric mantle is largely constrained from the petrological and geochemical studies of xenoliths. They are complemented by studies of orogenic peridotites and ophiolites, which show the space relationships among various mantle rock kinds, missing in xenoliths. Mantle xenoliths from cratonic regions are distinctly different from those occurring in younger non-cratonic areas. Percolation of melts and fluids through the lithospheric mantle significantly modifies its petrological and geochemical features, which is recorded in mantle xenoliths brought to the surface by oceanic and continental volcanism. Basalts and other mantle-derived magmas provide us another opportunity to study the chemical and physical properties the mantle. These various kinds of information, when assembled together and coupled with experiments and geophysical data, enable the understanding of upper mantle dynamics.
This session’s research focus lies on mineralogical, petrological and geochemical studies of mantle xenoliths, orogenic and ophiolitic peridotites and other mantle derived rocks. We strongly encourage the contributions on petrology and geochemistry of mantle xenoliths and other mantle rocks, experimental studies, the examples and models of mantle processes and its evolution in space and time.

Public information:
12 scientists declared that they will participate in the GMPV4.4 chat planned on Wednesday, 6 May, from 14.00 to 15.45. We plan that after short introduction from the convener each of the listed Authors will type short introduction highlighting the most important results of her/his study, and there will be short time (5-8 minutes) for questions and comments from chat participants. The displays will be presented in the following sequence:

Introduction from the Convener
1.Kazuhito Ozawa
2. Dirk Spengler
3. Federico Casetta
4. Petros Koutsovitis
5. Jakub Mikrut
6. Giulia Consuma
7. Hubert Mazurek
8. Magdalena Matusiak-Malek
9. Eszter Badenszki
10. Daniel Buczko
11. Malgorzata Ziobro
12. Taisia Alifirova

At the end, if we have time left, we can discuss one or two problems which are important for mantle researcher’s community.

The origin and evolution of the continental lithosphere is closely linked to changes in mantle dynamics through time, from its formation through melt depletion to multistage reworking and reorganisation related to interaction with melts formed both beneath and within it. Understanding this history is critical to constraining terrestrial dynamics, element cycles and metallogeny. We welcome contributions dealing with: (1) Reconstructions of the structure and composition of the lithospheric mantle, and the influence of plumes and subduction zones on root construction; (2) Interactions of plume- and subduction-derived melts and fluids with continental lithosphere, and the nature and development of metasomatic agents; (3) Source rocks, formation conditions (P-T-fO2) and evolution of mantle melts originating below or in the mantle lithosphere; (4) Deep source regions, melting processes and phase transformation in mantle plumes and their fluids; (5) Modes of melt migration and ascent, as constrained from numerical modelling and microstructures of natural mantle samples; (6) Role of mantle melts and fluids in the generation of hybrid and acid magmas.These topics can be illuminated using the geochemistry and fabric of mantle xenoliths and orogenic peridotites, mantle-derived melts and experimental simulations.

Mineralogy is the cornerstone of many disciplines and is used to solve a wide range of questions in geoscience. This broad session offers the opportunity to explore the diversity of methods and approaches used to study minerals and how minerals behave and evolve in their many contexts. We welcome contributions on all aspects of mineralogy, including environmental, soil science, metamorphic, plutonic, deep Earth, planetary, applied mineralogy, and so on. All approaches are welcome: analytical, experimental and theoretical.

Mineral deposits represent principal sources of metallic and non-metallic raw materials for our society. The implementation of new climate policies and the rise of green energy production and use will trigger an unprecedented demand increase for such resources. Formation of economic commodities requires component sequestration from source region, transport and focusing to structural or chemical barriers. These enrichment processes typically involve magmatic, hydrothermal, weathering or metamorphic events, which operate in diverse geodynamic settings and over various time scales. The scope of this session is to collect insights from diverse areas of mineral exploration, field, analytical or experimental studies of mineral deposits as well as resource characterization and extraction. We invite contributions from fields of economic geology, mineralogy and geochemistry in order to advance our understanding of ore-forming systems.

(Bio)minerals, in particular carbonates (but also others e.g. phosphates), play an essential role in shaping our understanding of the evolution of life and the Earth System, and constitute one of the most important archives of past climatic and environmental conditions. Geochemical, petrographic or crystallographic approaches have yielded new insights into the physico-chemical conditions governing their formation, including through biomineralisation pathways. These capture vital information about the environment and fluid chemistry during precipitation in the form of their specific elemental or isotopic signatures, mineralogies or micromorphologies. Over the past decades, a refined understanding of both biogenic as well as abiotic carbonates and other mineral archives, together with the development of new analytical methods and palaeo-proxies, has led to numerous breakthroughs in palaeoclimate research. However, the quality and reliability of the climatic and environmental information we extract from these records depends, critically, on careful proxy calibrations and the evaluation of secondary controls such as kinetic or vital effects and diagenetic influences. This session seeks contributions from sedimentology, geochemistry, (palaeo)biology, and mineralogy that utilise carbonate or other relevant (bio)minerals to improve our understanding of past environmental conditions over a broad range of timescales, including (but not limited to) microbialites, mollusc shells, coral skeletons or foraminifera. We welcome experimental or theoretical studies dealing with culturing of calcifying organisms, synthetic mineral precipitation, transformation or alteration processes, elemental partitioning or isotopic fractionation (to give but a few examples). The aim of this session is to synthesize recent progress on the investigation as well as application of these important archives, and to showcase methodological advances that will help us to build a more comprehensive understanding of past global changes.

Reactions between fluids and rocks have a fundamental impact on many of the natural and geo-engineering processes in crustal settings. Examples of such natural processes are localization of deformation, earthquake nucleation caused by high pressure fluid pulses, as well as metamorphic reactions and rheological weakening triggered by fluid flow, metasomatism and fluid-mediated mass transport. Moreover, the efficiency of many geo-engineering processes is partly dependent on fluid-rock interactions, such as hydraulic fracturing, geothermal energy recovery, CO2 storage and wastewater injection. All our observations in the rock record are the end-product of all metamorphic, metasomatic and deformation changes that occurred during the interaction with fluid. Therefore, to investigate and understand these complex and interconnected processes, it is required to merge knowledge and techniques deriving from several disciplines of the geosciences.
We invite multidisciplinary contributions that investigate fluid-rock interactions throughout the entire breadth of the topic, using fieldwork, microstructural and petrographic analyses, geochemistry, experimental rock mechanics, thermodynamic modeling and numerical modeling.

This session welcomes contributions from geophysical, geochemical, microbial, numerical, and laboratory studies to promote a better understanding of geological processes and Life in modern and fossil extreme environments, with a special emphasis on mud volcanoes and hydrothermal systems. We encourage multidisciplinary studies related to environments that promoted Life emergence on the Hadean Earth both in past and present extreme terrestrial environments including planetary analogues. We welcome discussion about new approaches to detect and characterise Life in such conditions ranging from biology to geophysics. This also includes geochemical, geological and multidisciplinary datasets investigating piercement structures and their geochemical reactions occurring at depth and at the surface as well as microbiological studies. The session will also discuss the effects of extreme environments on palaeo-climate and how external forcing may affect such systems.

Public information:
Dear Authors,

in order to facilitate the exchange of information during the chat session, we have divided the contributions by topics and accordingly we proposed an attendance time (see below). We wish you all a productive EGU conference.

BG5.3 convenors
--------------------------------------------------------------------------------------

----------------------------------------------------------------------
Attendance time: Tuesday, 05 May 08:30–10:15

D796 |
EGU2020-3344
| Highlight
The effects of climate change on the Atacama Desert as a pertinent Mars analog model
Armando Azua-Bustos and Alberto G. Fairén

D797 |
EGU2020-12720
A characterization of microbial diversity in the Winter Wonderland Ice Cave, Uinta Mountains, Utah, USA
Miranda Seixas, Erin Eggleston, Jeffrey Munroe, and David Herron

D798 |
EGU2020-12203
Linking decay of microbial mats and dolomite formation in the sabkhas of Qatar
Zach Diloreto, Maria Dittrich, Tomaso Bontognali, Hamad Al Saad Al Kuwari, and Judith A. McKenzie

D799 |
EGU2020-1581
The waterbodies of the Dallol volcano: A physico-chemical and geo-microbial survey
Hugo Moors, Miroslav Honty, Carla Smolders, Ann Provoost, Mieke De Craen, and Natalie Leys

D813 |
EGU2020-3003
Detecting microbial pigments from gypsum using Raman spectroscopy: from field prospection to laboratory studies
Jan Jehlicka, Kateřina Němečková, and Adam Culka

D814 |
EGU2020-12335
The characteristics of microbial communities along the littoral gradient of a proglacial lake in Qinghai-Tibet Plateau
Meiqing Lu, Xin Luo, Jiu Jimmy Jiao, Hailong li, Xingxing Kuang, Rong Mao, Xiaoyan Shi, and Yuqing Feng

D815 |
EGU2020-667
The ferruginous, sulfate-rich hypolimnion of a post-mining lake as an analogue to disentangle redox cycling in Paleoproterozoic coastal zones
Daniel Petráš, Christophe Thomazo, and Stefan Lalonde

D816 |
EGU2020-20279
Detection of sulphuric life in Mars analogue material using a miniature LIMS system
Andreas Riedo, Valentine Grimaudo, Joost W. Aerts, Alena Cedeño López, Marek Tulej, Pascale Ehrenfreund, and Peter Wurz


----------------------------------------------------
Attendance time: Tuesday, 05 May 10:45–12:30


D800 |
EGU2020-15205
New insights into the magmatic system southeast of El Hierro from high-resolution 2D seismic data
Kai-Frederik Lenz, Felix Gross, Andreas Klügel, Rachel Barrett, Philipp Held, Katja Lindhorst, Paul Wintersteller, and Sebastian Krastel

D801 |
EGU2020-3673
| Highlight
Earthquake triggering of mud volcanoes and fluid seepage systems in fold-and-thrust belts and subduction zones
Marco Bonini and Daniele Maestrelli

D802 |
EGU2020-1271
Peculiarities of mud volcanism in Lake Baikal
Grigorii Akhmanov, Adriano Mazzini, Oleg Khlystov, Alina Kudaeva, and Olesia Vidishcheva

D803 |
EGU2020-16565
Different pockmark systems and their potential importance for the hydrological and biogeochemical balance of a peri-alpine lake
Adeline N.Y. Cojean, Maciej Bartosiewicz, Jeremy Zimmermann, Moritz F. Lehmann, Katrina Kremer, and Stefanie B. Wirth

D804 |
EGU2020-4840
Internal Structure of Venere Mud Volcano in the Crotone Forearc Basin, Calabrian Arc, Italy, from Multibeam Bathymetry, Wide-Angle and Multichannel Seismic Data
Michael Riedel, Anne Krabbenhoeft, Cord Papenberg, Joerg Bialas, Gerhard Bohrmann, and Silvia Ceramicola

D805 |
EGU2020-3664
Tectonic structures vs genesis and activity of mud volcanoes: examples from Emilia and Marche (Northern Apennines, Italy)
Marco Bonini, Daniele Maestrelli, and Federico Sani

D806 |
EGU2020-1336
A shallow mud volcano in the sedimentary basin off the Island of Elba
Alessandra Sciarra, Anna Saroni, Fausto Grassa, Roberta Ivaldi, Maurizio Demarte, Christian Lott, Miriam Weber, Andi Eich, Ettore Cimenti, Francesco Mazzarini, and Massimo Coltorti

D807 |
EGU2020-1315
Explosive mud volcano eruptions and rafting of mud breccia blocks
Adriano Mazzini, Grigorii Akhmanov, Manga Michael, Alessandra Sciarra, Ayten Khasayeva, and Ibrahim Guliyev

D808 |
EGU2020-5213
Palynology of Holocene Lake Baikal sediments
Alienor Labes, Adriano Mazzini, Grigorii G. Akhmanov, and Wolfram M. Kürschner

D809 |
EGU2020-20934
Integrated analysis of geophysical and geochemical data from cold fluid seepage system along the Gydratny Fault (Lake Baikal)
Olesya Vidischeva, Marina Solovyeva, Evgeniya Egoshina, Yana Vasilevskaya, Elena Poludetkina, Grigorii Akhmanov, Oleg Khlystov, and Adriano Mazzini

D810 |
EGU2020-1741
Geochemistry of oil-and-gas seepage in Lake Baikal: towards understanding fluid migration system
Evgeniya Egoshina, Michail Delengov, Olesya Vidishcheva, Elena Bakay, Natalya Fadeeva, Grigorii Akhmanov, Adriano Mazzini, and Oleg Khlystov

D811 |
EGU2020-4413
Concentrations and behavior of rare earth elements in mud volcanic waters
Alexey Sobisevich, Valery Ershov, Evgeniy Elovskiy, Elnur Baloglanov, and Irina Puzich

D812 |
EGU2020-3307
Borate accumulations related to onshore mud volcanism: Case study from the Kerch Peninsula, the Caucasus collision zone
Ellina Sokol, Svetlana Kokh, Olga Kozmenko, and Vasili Lavrushin

Fractures and faults are common tectonic features within shallowly deformed rocks. Fracture networks play a fundamental role in fluid migration. Understanding the mechanical and chronological development of fracture networks is therefore key for tectonic studies as well as for resources exploration and waste repositories studies.
Fractures and faults are witnesses of the medium history, resulting from processes controlled by physical forces and/or chemical potential. A better understanding of the parameters that control fracture complexity in rocks will lead to new tools for reconstructing crustal-scale processes such as fluid flow and fluid-rock interactions, paleostress evolution and earthquake tectonics. However, the great challenge is the understanding of dynamic feedbacks between fluid flow, permeability rise/fall, chemical reactions and rock failure. Fluid sources, fluid flow and fluid-rock interactions vary spatially and temporally as a function of basin and reservoir structural evolution, altering the physical/mechanical properties of fractures and host rocks.
Fractures form at all stages of rock history, from early diagenesis/burial to major deformation events. Building realistic conceptual and predictive models of fracture types and occurrence therefore requires recognition of fractures formed prior to, and during deformation events. A blind spot in fracture analysis has been for long the lack of constraints on the absolute timing of brittle failure and structural diagenesis. Recent progress in absolute dating of calcite cements/coatings of veins/faults has proven the relevance of meso-structures to regional structural evolution, allowing for a refined tectonic history. New steps forward include a better appraisal of the rate of development and lifetime of individual fracture and fracture sets, and of the timing and rate of fluid flow in fractured rocks.
This session aims at bringing together scientists working in the field, in the lab, and on simulations to foster discussion towards improving our understanding of (1) the mechanics, occurrence, timing and stress history of fractures in upper crustal rocks, and (2) the role fracture networks play on subsurface fluid flow. We welcome contributions from all fields, including structural geology, mechanics, isotope geochemistry, and hydrogeology that aim at comprehending the development of fracture systems in time and space and their co-evolution with fluid flow in a variety of geological settings.

Dissolution, precipitation and chemical reactions between infiltrating fluid and rock matrix alter the composition and structure of the rock, either creating or destroying flow paths. Strong, nonlinear couplings between the chemical reactions at mineral surfaces and fluid motion in the pores often leads to the formation of intricate patterns: networks of caves and sinkholes in karst area, wormholes induced by the acidization of petroleum wells, porous channels created during the ascent of magma through peridotite rocks. Dissolution and precipitation processes are also relevant in many industrial applications: dissolution of carbonate rocks by CO2-saturated water can reduce the efficiency of CO2 sequestration, mineral scaling reduces the effectiveness of heat extraction from thermal reservoirs, acid rain degrades carbonate-stone monuments and building materials.

With the advent of modern experimental techniques, these processes can now be studied at the microscale, with a direct visualization of the evolving pore geometry. On the other hand, the increase of computational power and algorithmic improvements now make it possible to simulate laboratory-scale flows while still resolving the flow and transport processes at the pore-scale.

We invite contributions that seek a deeper understanding of reactive flow processes through interdisciplinary work combining experiments or field observations with theoretical or computational modeling. We seek submissions covering a wide range of spatial and temporal scales: from table-top experiments and pore-scale numerical models to the hydrological and geomorphological modelling at the field scale. We also invite contributions from related fields, including the processes involving coupling of the flow with phase transitions (evaporation, sublimation, melting and solidification).

Public information:
There will be a zoom session connected with the session on Tue, May 5th, at 18.00 CET

https://us04web.zoom.us/j/79628870111

From the Archean to the present, the dynamic evolution of the lithosphere is preserved in the metamorphic rock record. Each piece of evidence on mineral reactions, deformation and fluid-rock interaction helps to reconstruct the puzzle of lithospheric tectonics in all its complexity. Analytical and conceptual innovations in petrology, geochemistry, chronology, structural analysis and thermodynamic/thermomechanical modelling continue to improve our ability to read the metamorphic rock record and open new avenues for future development.

This session will highlight research in integrated metamorphic petrology and its application to solid earth behaviour in orogens, subduction zones and cratons throughout geological time. We welcome contributions across the breadth of this field—from petrology, (petro-)chronology, trace-element and isotope geochemistry to microstructures, modelling and geodynamics—with a focus on metamorphic and metasomatic processes that shape the lithosphere across a range of scales.

Invited speakers: Sarah Incel (University of Oslo), Richard Palin (University of Oxford) 

Public information:
We will have relatively few presentations in the 2nd slot, so we will transfer the last few of our 1st-slot presentations there (if authors are OK). This way we will have more time for further great discussions!

The goal of this session is to reconcile short-time/small-scale and long-time/large-scale observations, including geodynamic processes such as subduction, collision, rifting or mantle lithosphere interactions. Despite the remarkable advances in experimental rock mechanics, the implications of rock-mechanics data for large temporal and spatial scale tectonic processes are still not straightforward, since the latter are strongly controlled by local lithological stratification of the lithosphere, its thermal structure, fluid content, tectonic heritage, metamorphic reactions and deformation rates.

Mineral reactions have mechanical effects that may result in the development of pressure variations and thus are critical for interpreting microstructural and mineral composition observations. Such effects may fundamentally influence element transport properties and rheological behavior.
Here, we encourage presentations focused on the interplay between metamorphic processes and deformation on all scales, on the rheological behavior of crustal and mantle rocks and time scales of metamorphic reactions in order to discuss
(1) how and when up to GPa-level differential stress and pressure variations can be built and maintained at geological timescales and modelling of such systems,
(2) deviations from lithostatic pressure during metamorphism: fact or fiction?,
(3) the impact of deviations from lithostatic pressure on geodynamic reconstructions.
(4) the effect of porous fluid and partial melting on the long-term strength.
We therefore invite the researchers from different domains (rock mechanics, petrographic observations, geodynamic and thermo-mechanical modelling) to share their views on the way forward for improving our knowledge of the long-term rheology and chemo-thermo-mechanical behavior of the lithosphere and mantle.

Subduction zones are one of the key players in driving plate tectonics. They are also the locus of most mineral and rock transformations, mass/fluid transfer and seismicity. Understanding initiation, development and closure of subduction zones -including their evolution into collisional systems- is therefore a challenge facing Earth sciences. This session aims at covering the tectonic and metamorphic evolution from nascent to mature convergent systems in both space and time as well as studying the complex feedbacks of processes related to the thermo-mechanical history of subducted and exhumed rocks. This includes studies focusing on tectonic processes in oceanic and continental subduction setting over space and timescales (e.g. mechanical (de)coupling, rock accretion and exhumation...) in active and ancient convergent settings. We welcome contributions from a wide range of disciplines such as structural geology, tectonics, petrology, geophysics, experimental deformation and numerical modelling, with particular emphasis on the rock record.

Magmatic processes occurring at depth within volcanic plumbing systems are complex and play a fundamental role in controlling the tempo and style of volcanic activity. To unravel the structural complexity and temporal evolution of plumbing systems a multidisciplinary approach is necessary. This session aims to bring together scientists working on the understanding of the structural, chemical and temporal evolution of magmatic systems using, for example, fieldwork, petrology, geochemistry, geophysics, geodesy, experiments or numerical modelling to diffuse the boundaries between disciplines and lead to a comprehensive understanding of the inner workings of Volcanic and Igneous Plumbing Systems (VIPS).

This session is sponsored by the IAVCEI Commission on Volcanic and Igneous Plumbing Systems.

Snapshots of magma chemistry recorded in magmas and crystal cargoes reflect combinations of processes that operate in the magma source (e.g. metasomatism and tapping of various mantle components) and during differentiation in the crust (e.g. fractional crystallization, crustal assimilation, mixing/mingling, replenishment of magma reservoirs and chambers, and crustal melting). The fundamental questions addressed by this session concern the principal controls on primary, parental and derivative magma compositions as witnessed by the crystalline components of magmas, isotopic records, and experiments that replicate natural systems. We therefore welcome contributions focusing on the generation and differentiation of magmas in the mantle and crust with particular emphasis on crystal-scale studies, experimental petrology, thermodynamic and geochemical modelling, and layered intrusions.

The session deals with the documentation and modelling of the tectonic, deformation, and geodetic features of any type of volcanic area, on Earth and in the Solar System. The focus is on advancing our understanding on any type of deformation of active and non-active volcanoes, on the associated behaviours, and the implications for hazards. We welcome contributions based on results from fieldwork, remote-sensing studies, geodetic and geophysical measurements, analytical, analogue and numerical simulations, and laboratory studies of volcanic rocks. We also welcome multidisciplinary studies, especially those that integrate data collected at different scales (e.g. laboratory and field data).
Studies may be focused at the regional scale, investigating the tectonic setting responsible for and controlling volcanic activity, both along divergent and convergent plate boundaries, as well in intraplate settings. At a more local scale, all types of surface deformation in volcanic areas are of interest, such as elastic inflation and deflation, or anelastic processes, including caldera and flank collapses. Deeper, sub-volcanic deformation studies, concerning the emplacement of intrusions, as sills, dikes, and laccoliths, are most welcome.
We also particularly welcome geophysical data aimed at understanding magmatic processes during volcano unrest. These include geodetic studies obtained mainly through GPS and InSAR, as well as studies that model these data to image sources.


The session includes, but is not restricted to, the following topics:
• volcanism and regional tectonics;
• formation of magma chambers, laccoliths, and other intrusions;
• dyke and sill propagation, emplacement, and arrest;
• earthquakes and eruptions;
• caldera collapse, resurgence, and unrest;
• flank collapse;
• volcano deformation monitoring;
• volcano deformation and hazard mitigation;
• volcano unrest;
• mechanical properties of rocks in volcanic areas.

Interaction between the different phases (exsolved and dissolved volatiles, liquid melt, crystals, and pyroclasts) that separate during magma evolution, ascent and storage as a result of interlinked fluid, thermodynamic and chemical processes have a dramatic influence on eruption dynamics, resulting in a plethora of explosive eruptions types.
On one side, constraining volatile budget in magmas and quantifying degassing processes is a fundamental task to better understand the role of volatile elements on eruption dynamics. On the other side, the complex shallow plumbing system dynamics produces seismic and acoustic events, ground deformation and changes in the hydrothermal system often preceding or follow the explosive activity and direct field observations can constrain individual eruptive processes.
For this reason, the session aims at gathering field observation and experimental and modeling studies on eruptive processes to unlock the complex dynamics of volcanic activity. We hereby invite contributions focusing on (but not restricted to) volatiles in magmas, crystallization dynamics, effusive/explosive transition, rheology of gas-liquid-solid mixtures, fragmentation processes.
Further, we like to stimulate discussion on how multidisciplinary approaches can be used to advance the interpretation of geochemical and petrological observations on magmatic products and more specifically on the quantification of disequilibria processes during volcanic eruptions.

Over the past few years, major technological advances allowed to significantly increase both the spatial coverage and frequency bandwidth of multi-disciplinary observations at active volcanoes. Networks of instruments for the quantitative measurement of many parameters now permit an unprecedented, multi-parameter vision of the surface manifestations of mass transport beneath volcanoes. Furthermore, new models and processing techniques have led to innovative paradigms for inverting observational data to image the structures and interpret the dynamics of volcanoes. Within this context, this session aims at bringing together a multidisciplinary audience to discuss the most recent innovations in volcano imaging and monitoring, and to present observations, methods and models that increase our understanding of volcanic processes.
We welcome contributions (1) related to methodological and instrumental advances in geophysical, geological and geochemical imaging of volcanoes, and (2) to explore new knowledge provided by these studies on the internal structure and physical processes of volcanic systems.
We invite contributors from all geophysical, geological and geochemical disciplines such as seismology, electromagnetics, geoelectrics, gravimetry, magnetics, muon tomography, volatile measurements and analysis; from in-situ monitoring networks to high resolution remote sensing and innovative processing methods, applied to volcanic systems ranging from near-surface hydrothermal activity to magmatic processes at depth.

In response to a Horizon2020 call to Integrate and open European research infrastructures of starting communities a successful proposal from the European volcanological community, including key research infrastructures and stakeholders resulted in funding of the EUROVOLC project, the first integrating activity in volcanology. In addition to enabling open access for European researchers to key volcanological research infrastructures and data, as well as carrying out joint research activities to enhance the services offered by the infrastructures, the underlying aim of EUROVOLC is to overcome the fragmentation of the volcanological community and the widely distributed infrastructures by developing dynamic connections and collaborations within the community and between the community and its stakeholders. The EUROVOLC consortium includes all the main European volcano observatories and many of the strongest volcano research institutions, Civil Protection agencies, geothermal industry and IT companies. This ensemble has since early 2018 carried out a variety of Networking, Joint Research and Virtual Access activities. The group has also issued two open research calls offering Trans-national Access to the research infrastructures and successfully organized a summer school for young scientists. The session will highlight the networking, data, products, services, accesses and research achieved in EUROVOLCs many activities. The session also welcomes contributions from the research projects funded through EUROVOLCs Trans-national grants, to more fully demonstrate the research opportunities made available by EUROVOLC.

Active tectonics and volcano-tectonic processes are related to earthquakes, fracturing, fault motion (such as creeping), volcanic eruptions, caldera or flank collapse and magmatic intrusions, such as dyking. Satellite data using optical or thermal sensors provide first order information about faulting and volcanic activity, however, there is a resolution gap below the meter-scale, critical to detect and analyse small structures over broad areas and to better assess how faults, magma intrusions and collapses nucleate and evolve. During large deformations (earthquakes, dyke intrusions, collapses), the near-field area where satellite radar signal (InSAR) becomes incoherent remains poorly studied. In addition, classical field surveys and data collection are, very often, not feasible due to difficult logistic condition, hazardous accesses and/or inaccessible areas. Therefore, there is a need to collect higher resolution data to better understand faulting and volcanic processes at scales from cm to several meters, that complement classical field studies and satellite data. The scientific community has adopted modern direct and indirect methods to develop in the last decade, like the Structure from Motion (SfM) techniques.
SfM techniques have been applied using imagery acquired from field and aerial survey, using cameras and mobile phones, Unmanned Aerial Vehicles (UAVs, i.e. drones), balloons, airplanes and helicopters. This technique produces digital surface models (DSM), ortho-mosaic imagery, dense point clouds and 3D models, creating a high-resolution environment reconstruction for a single outcrop or a wide area. The session will focus on the application of the SfM techniques for research in the field of structural geology, with particular regard to active tectonics and volcano-tectonic processes. The session covers, without being limited to, the following topics: i) case studies where the SfM has been employed; ii) SfM methods, 3D reconstruction and successive analysis; iii) innovative application for SfM for survey, such as ground deformation analysis; iv) integration and comparison of SfM-derived, field and satellite data; v) new tools and methods for data analysis on SfM-derived models; and vi) future works and applications of SfM techniques.

Seismology is fundamental for monitoring and investigating volcanic systems.
Volcanoes are complex systems comprising both time-varying processes and structural heterogeneity. This combination of wide-ranging complex processes, extreme geomechanical heterogeneity, frequently rapid changes in time, leads to challenges in interpreting seismic observations in terms of physical processes at depth. In addition, the link between the variety of physical processes beneath volcanoes and their seismic response (or lack of) is often poorly understood, making it difficult to develop a detailed understanding of the physical processes at work in volcanic systems.
To address these challenges, this session aims to bring together seismologists, volcano and geothermal seismologists, and wave propagation and source modellers working on different aspects of volcano seismology including but not limited to: (i) seismicity catalogues (statistics & spatio-temporal evolution of seismicity), (ii) innovative methods for source locations (iii) source inversions (iv) seismic wave propagation & scattering, (v) small scale deformation studies, (vi) new developments in volcano imagery, (vii) time-lapse studies – including the use of noise, multiplets and high-rate GPS. Studies on geothermal systems in volcanic environments are also welcome.
By considering interrelationships between these complementary seismological areas, we aim to develop a coherent picture of the latest advances, successful applications and outstanding challenges in volcano seismology.

Public information:
SCHEDULE

16:15 Start of the session
Introduction

16:20 Guardo et al.: “Space-weighted seismic attenuation multi-frequency tomography at Deception Island volcano (Antartica)” (EGU2020-9986)

16:25 Eibl et al.: “Rotational sensor on a volcano: New insights from Etna, Italy” (EGU2020-18862)

16:30 Gabrielli et al.: “Geomorphological controls on seismic recordings in volcanic areas” (EGU2020-511)

16:35 Metaxian et al.: “Towards real-time monitoring with a seismic antenna at Merapi volcano” (EGU2020-19068)

16:40 Falcin et al.: “Automatic classification of seismo-volcanic signals at La Soufrière of Guadeloupe” (EGU2020-10234)

16:45 Lamb et al.: “Identifying icequakes at ice-covered volcanoes in Southern Chile” (EGU2020-851)

16:50 Battaglia et al.: “Discriminating icequakes from volcanic seismicity at Cotopaxi volcano (Ecuador) “ (EGU2020-11749)

16:55 Garza-Giron et al.: “Hidden earthquakes unveil the dynamic evolution of a large-scale explosive eruption “ (EGU2020-14124)

17:00 Shapiro et al.: "Degassing of volatile-reach basaltic magmas: source of deep long period volcanic earthquakes" (EGU2020-8251)

17:05 Cesca et al.: “The seismic sound of deep volcanic processes”, (EGU2020-6813)

17:10 Sadeghi and Suzuki: “The 11 November 2018 Mayotte event was observed at the Iranian Broadband seismic stations” (EGU2020-9767)

17:15 Ikegaya and Yamamoto: “Spatio-temporal characteristics and focal mechanisms of deep low-frequency earthquakes beneath Zao volcano, Japan”, (EGU2020-12533)

17:20 Möllhoff et al.: “Recent microseismicity observed at Hekla volcano and first velocity inversion results” (EGU2020-18954)

17:25 Bjarnasson et al. (presenting Revathy Parameswaran): “Interseismic stress field variations in Hjalli-Ölfus, SW Iceland” (EGU2020-8521)

17:30 Eibl et al.: “Seismic Eruption Catalog of Strokkur Geyser, Iceland“ (EGU2020-16535)

17:35 Thorbjarnardóttir et al.: “The Great Geysir and tectonic interactions in South Iceland”, (EGU2020-16388)

17:40 Nooshiri et al.: “Source mechanisms of seismic events during the 2018 eruption of Sierra Negra Volcano (Galapagos) determined by using polarization properties of complete (near-field and far-field) body waves”, (EGU2020-11297)

17:45 Longobardi,et al.: “Multiplet Based Time Lapse Velocity Changes Prior to the 2018 Eruption of Sierra Negra Volcano, Galapagos Island Observed with Coda Wave Interferometry” (EGU2020-18213)

17:50 Ka Lok Li et al.: “Different mechanisms of the pre- and co-eruptive tremor during the 2018 eruption at Sierra Negra volcano, Galapagos” (EGU2020-18975)

17:55 Dehghanniri and Jellinek: “An Experimental Study of Volcanic Tremor Driven by Magma Wagging” (EGU2020-11365)



FORMAT OF THE SESSION: Each author will present her/his work by highlighting the main points (ideally copy/paste). Please do it in a short summary. This will be followed by questions and discussion. The length of the individual slot (including questions) is 5 minutes.

In recent years, attention was paid to the detection and monitoring of volcanic ash clouds as their impact on the air traffic control system was unprecedented. Volcanic clouds are dangerous for the aviation as they can cause damage of the aircraft systems and engines not only close to active volcanoes but also at large distance from the eruption.
The intensity of the extreme convective events is supposed to increase worldwide due to the climate change and they can also cause large damages and affect air safety.

The recent Anak Krakatau, Raikoke and Ulawun eruptions highlighted the issue on different techniques to distinguish volcanic ash clouds from convective clouds, and the unsolved problem to understand if the cloud top is tropospheric or stratospheric.

The “extreme clouds” detection and estimation of their physical parameters is a highly multidisciplinary and challenging topic since the same techniques and instruments can be used for meteorology, volcanic monitoring, atmospheric physics and climate purposes. There is an urgent need to develop new techniques and instruments for monitoring, detecting and modeling “extreme clouds” to develop early warning systems and to support users, decision makers and policy makers.

This session solicits the latest studies from the spectrum of:
- Volcanic and Convective Clouds (CVC) remote sensing, detection, monitoring, modeling, forecasting and nowcasting
- understanding of CVC structure, including overshooting and ice clouds
- understanding the impact of CVC on climate changes and air safety
- proposal of new products or services focused on the end-users prospective (air traffic management and air safety)
- discussion on the recent Anak Krakatau, Raikoke and Ulawun eruptions

By considering studies over this range of topics we aim to identify new methods, detail current challenges, understand common techniques/methods and identify common discussions within the communities of atmospheric physicists, meteorologists, modelers, air traffic managers, pilots sensors engineers and engines manufacturers.

We particularly welcome and encourage contributions connecting different fields such as:
- forecasting tools to support air traffic management improving the limits of the present science and new products/tools providing better services to the end-users,
- extreme clouds remote sensing with novel techniques and new sensors,
- novel techniques to detect overshooting and their impact on climate.

Environmental systems often span spatial and temporal scales covering different orders of magnitude. The session is oriented in collecting studies relevant to understand multiscale aspects of these systems and in proposing adequate multi-platform and inter-disciplinary surveillance networks monitoring tools systems. It is especially aimed to emphasize the interaction between environmental processes occurring at different scales. In particular, a special attention is devoted to the studies focused on the development of new techniques and integrated instrumentation for multiscale monitoring high natural risk areas, such as: volcanic, seismic, energy exploitation, slope instability, floods, coastal instability, climate changes and other environmental context.
We expect contributions derived from several disciplines, such as applied geophysics, geology, seismology, geodesy, geochemistry, remote and proximal sensing, volcanology, geotechnical, soil science, marine geology, oceanography, climatology and meteorology. In this context, the contributions in analytical and numerical modeling of geological and environmental processes are also expected.
Finally, we stress that the inter-disciplinary studies that highlight the multiscale properties of natural processes analyzed and monitored by using several methodologies are welcome.

In tectonic and volcanic regions earthquake swarms and seismic sequences are frequently characterized by complex temporal evolution, and a delayed occurrence of the largest magnitude earthquakes. The complex evolution of such seismic sequences is generally considered to derive from transient forcing where fluids play a major role causing slow-slip and creeping events, and – at volcanoes – stresses due to magma migration (i.e. dike intrusion and pressurization of the magma plumbing system). Yet, the mechanisms of fluid-rock interaction, leading to changes of the rheological properties of faults, and of the fracture mechanics, are still far beyond a full understanding. Therefore, it is fundamental to develop and implement innovative methodologies and technologies or to apply multi-disciplinary approaches for a multi-parametric crustal imaging aimed at tracking fluid movements and/or pore fluid-pressure diffusion within the seismogenic crust, and to integrate the results with the analysis of spatio-temporal and size characteristics of earthquake occurrence. The two approaches complement each other improving, on one hand, our understanding of crustal properties and, on the other hand, help constraining the degree of involvement of fluids by the analysis of the earthquake statistics.
This session aims at putting together studies of swarms and complex seismic sequences modulated by aseismic transient forcing as well as field studies, numerical modeling, theoretical and experimental investigation on the detection and tracking of crustal fluids in tectonic, volcanic and industrial contexts. Contributions from multi-disciplinary studies of fluid geochemistry, surface ground deformation and space-time variations of electrical and seismic crustal properties are also welcome, as well as laboratory and numerical modeling simulating the mechanical condition yielding to fluid-driven swarm-like and complex seismic sequences.

Volcanic emission can have a strong impact on the Earth’s radiation budget and climate over a range of temporal and spatial scales, depending on the activity type (passive degassing and small magnitude to strong explosive eruptions).
It is now well known that strong explosive volcanic eruptions are a major natural driver of climate variability at interannual to multidecadal time scales. Assessment of volcanically-forced climate variability is complicated by many limiting factors, including the paucity of observed eruptions, uncertainties in volcanic forcing datasets for the current and pre-instrumental periods, limitations of proxy-based climate evidence, uncertainties of global aerosol model simulations and the apparent large inconsistencies in the responses to volcanic forcing simulated by current climate models. Quiescent passive degassing and smaller-magnitude eruptions on the other hand can impact on regional climate system. In addition, volcanic emissions may influence local-to-regional air quality, seriously affect the biosphere and environment, and the release of gas from soil may pose long-term health hazards. This session focuses on new results from integrative research on the climatic, environmental and societal impacts of the volcanic activity, including eruptions of Pinatubo-magnitude and larger, volcanic degassing and small eruptions.

We aim to highlight contributions conducted under the umbrella of the CMIP6 and in particular VolMIP activity that explore the responses of the coupled ocean-atmosphere system to volcanic forcing, from the characterization of the mechanism of volcanically-forced climate variability and on the potential role of volcanic eruptions on future climate variability and predictability by means of observations, climate reconstruction studies and modeling approaches. We also welcome contributions conducted under PAGES-VICS activities from research aimed at better understanding volcanic impacts on historical and modern societies. We also invite contribution to the current international SPARC-SSiRC program, observational and modelling studies of the 2019 Raikoke aerosol cloud and from recent field campaigns. We further invite new results from H2020 transnational accesses to volcanic platforms and cross-studies coupling volcanology/atmospheric/health hazards, aspects of volcanic plumes science, their observation, modelling and impacts.

We are presently facing the 6th mass extinction, what can be learnt from the past ?
The session will focus on the six major Phanerozoic mass extinctions including the Anthropocene one, but contributions from other environmental crises (e.g. OAEs, PETM) are also welcome.

Volcanic islands are built from the sea floor at depths ranging from shallow coastal zones to the deep ocean. They occur in island arc, hotspot and rift zone settings. Submarine volcanic activity with associated magma-water interaction commonly precedes island formation. Recent unrest at oceanic islands and submarine volcanoes exposes the need for further identifications of risk posed to local communities. Many parameters of submarine to emergent volcanic activity are under active investigation, including the relationship between water depth and explosive activity, magma properties and magma composition, and the evolving material properties of their pyroclastic deposits and their influences on fluid, heat and solute fluxes and the initiation and development of authigenic minerals and microbial life. The aim of this session is to bring together experts from diverse disciplines to explore eruption mechanisms, island structure, island stability, hazards posed to coastal communities by unrest and eruption and the long term chemical and physical influences of submarine to emergent volcanic islands on oceanic processes.

The session will include presentations that integrate innovative and emerging technologies to enable focused and multi-disciplinary studies of recent and ancient eruptions and their products, as well as breakthrough developments in understanding the impacts of disastrous submarine volcanic hazards on present and past societies.

We especially welcome abstracts in the following areas:
- Submarine volcanic hazards such as explosive eruptions, volcanic earthquakes, submarine landslides, hydrothermal emissions and volcanogenic tsunamis.
- Mechanics of submarine and emergent volcanic eruptions and formation of oceanic islands.
- Optimal monitoring technologies and state of the art methods that explore submarine to emergent volcanoes, which host hydrothermal systems, mineral deposits and biomediated processes.
- Recommendations for volcanic crisis management, public awareness and preparedness through improved understanding of the hazards and impacts of submarine to emergent volcanoes.

Human interaction with the environment has gone through several stages of evolution. Being a product of the natural evolution of living organisms in the biosphere, Homo sapiens as a species has evolved in the geochemical conditions of the virgin biosphere. The rapid development of intellectual abilities of this genus allowed, first, to survive in adverse environmental conditions around the whole world, then, to cultivate the land, transform the entire system of biocenoses, and now to create a new habitat for man exclusively. The result was a significant geochemical transformation of the virgin biosphere, but a kind of punishment for the achieved progress was the emergence of a number of endemic diseases of a geochemical nature. Nowadays a variety of anthropogenic sources of pollution and their location in various natural geochemical conditions require not only constant monitoring of the chemical state of soil, water, air and food products, but also the development of spatially differentiated approaches to assessing the risk of provoked diseases. To solve this problem it is necessary concertedly interpreting a geochemical and medical information in order to assess the risks to human health associated with modern natural and anthropogenic geochemical features in urban and rural habitats. During session we propose to discuss:
1) global trends of health transformation in new geochemical environment of modern noosphere;
2) criteria for determining pollution level depending on environmental and geochemical constrains;
3) new approaches to assess the risk of diseases of geochemical nature in different countries;
4) the problem of mapping the risk zones, related to negative medical effects due to deficiency or excess of certain chemical elements or compounds.
Session co-sponsored by the European Association of Geochemistry.

Public information:
Human interaction with the environment has gone through several stages of evolution. Man as a species first survived in adverse environmental conditions around the world, then he began to cultivate the land, exploit other species and develop industry, changing the structure and composition of natural ecosystems, and now creates a new habitat exclusively in accordance with his own requirements. This activity leads to significant chemical pollution of the environment at the local, and in some cases at the regional level, which leads to disruption of natural food chains. This process is followed by the negative biological reactions of living organisms, including the man himself. These reactions and, in particular, endemic diseases of a geochemical nature can be regarded as a kind of punishment for the progress made. Emerging environmental problems require not only constant monitoring of the chemical state of soil, water, air and food products and identification of anthropogenic induced negative reactions, but also the development of spatially differentiated approaches to assessing the risk of triggered negative reactions and diseases. During our session, we will discuss:
1) global trends in health status in the new geochemical environment of the modern noosphere (the anthropogenic stage of biosphere evolution);
2) methods and criteria for determining the level of environmental pollution by metals, pesticides, radionuclides and pharmaceutical substances;
3) new approaches to assessing the risk of pollution and diseases of a geochemical nature in different countries;
4) the problems of identifying and mapping risk zones.
We kindly invite all interested parties to our session.

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.