European Geosciences Union (EGU) General Assembly

Start Date: 
Sunday, April 12, 2015
End Date: 
Friday, April 17, 2015

Location: Vienna, Austria


Includes the following sessions:

GMPV3.1 Magmas from the mantle

Convenor: Sally Gibson (

This session focuses on the physio-chemical controls involved in generation of melt from the mantle, including mid-ocean ridges, intraplate and subduction settings. Questions to be discussed include: whether primary melts form in the convecting and/or lithospheric mantle; the temperature and composition of melt source regions; volatile contents; the role of upwelling mantle plumes and/or lithospheric mantle and the overlying crust as a source or control on the nature of surface magmatism. Contributions from the fields of geochemistry, petrology, volcanology, geophysics and geodynamics will be welcome.

GMPV5.5/TS2.9 Volcanic Plumbing Systems: Dynamics of magma transport and emplacement in the Earth’s crust

Convenor: Olivier Galland (

Volcanic plumbing systems evolve through the interaction of numerous processes governing the ascent, emplacement and eruption of magma. These highly-dynamic processes operate and interlink on scales of millimetres to kilometres, from the Mantle to the Earth’s surface, and involve complex physics at the interface between fluid and solid mechanics that are challenging to tackle. Understanding the physics of volcanic plumbing systems is nonetheless crucial for forecasting the location, style and violence of volcanic eruptions, and for providing accurate hazard and risk assessments.

This session aims to bring together those who address the physical and temporal development of volcanic plumbing systems by using field or geophysical observations, theoretical or analytical models, and experimental or numerical models. This session includes, but is not restricted to, the following topics:

- Physics of melt segregation in magmatic sources;
- Fluid mechanics of crystal-bearing melts;
- Fracture mechanics related to dyke, sill and cone sheet emplacement;
- Mechanics of magma and host rock deformation related to pluton and laccolith emplacement;
- Comparative dynamics of igneous and sedimentary intrusions;
- Magma-host rock dynamics during formation of volcanic vents, diatremes and pipes;
- Prediction of volcanic vent location and distribution.

This session is process-oriented, and it aims to trigger cross-disciplinary interactions. We therefore strongly encourage comparisons and validation of modelling results with field and/or geophysical observations, as this is a crucial step toward fully unravelling the complex processes beneath, within and upon volcanoes.

SSP1.4/GMPV6.6 Mass Extinctions,Volcanism, Impacts, and Catastrophic Environmental Changes : where do we stand ?

Convenor: Thierry Adatte (

Over the last 30 years considerable research efforts have been directed toward understanding the context and nature of environmental changes that occurred immediately prior to, at, and after the five major Phanerozoic mass extinctions. Actually, earth volcanic activity linked to LIPS is one of the two leading scenarios proposed to explain the pattern of mass extinctions in the Phanerozoic, the other involving asteroid impacts However, the actual mechanisms by which either impacts or LIP eruptions can induce mass extinction remain controversial. This session will provide a platform to evaluate the current records of volcanism and impacts and associated environmental changes across Earth’s major mass extinction events.

PS9.1/GM10.2/GMPV7.11/TS9.6 Volcanism, tectonics, impacts and other geological processes across the Solar System

Convenor: Stephanie Werner (

Geological processes such as volcanism, tectonics, and impacts are fundamental to the formation and evolution of the planets, moons, asteroids and comets of our Solar System.

This session invites contributions to all facets of geological processes observed in our Solar System. Comparative studies on Earth and other planetary bodies using multi-instrumental, remotely sensed, experimental, computational, or field data are particularly welcome.

Vienna, Austria