GEOthermals Faults volcanoes and Fluids modeling workshop in Toulouse

This workshop aims at gathering researchers interested in modeling approaches of interacting active faults, volcanoes and geothermal systems. The view point of thermo-mechanics on these interacting dynamic systems covers a range of scales spanning the seismic and volcanic cycles to the evolution of crustal magma reservoirs and the emplacement of geothermal sites. It is motivated by ongoing collaborations at GET promoting scientific exchanges with New Zealand  and Chile.

Amongst our targets, a better understanding of the conditions by which seismogenic faults can trigger a volcanic eruption or conversely how magmatic intrusions destabilize fault zones ; major risks for instance in Taupo, New Zealand or in Cordon Caulle, Central Chile, which both display high enthalpy geothermals. Tectonic constraints also partially explain the distribution of high permeability fluid-outflow along and around fault zones, as is observed also in areas such as the Pyrénées, hosting low enthalpy geothermal potential. Magmatic segregation and circulating hydrothermal fluids appear to interact at brittle-ductile depths in a critical manner as to alter hydro-mechanical rock properties.

During this workshop, we will share ideas on the best ways to numerically model these fluid-rock interactions with the methods available today, given progresses in geological and geophysical data processing, lab experiments and the speeding up of computational power. Which scales can we tackle with a maximum set of coupled equations describing poro-elasto-visco-plastic thermal and petrological processes ?! Which rheologies have to be considered a minima ?

By exposing different types of data available in key areas (New Zealand, Chile, Pyrénées or elsewhere), and state of the art developments in experimental and numerical modeling methods, the aim of this workshop is also to generate new intra-extra European collaborations leading to the submission of projects at international level.

 

! Please Verify below your time but also your timing (20 or 30 mns), minor adjustments now ! Thanks!

Besides the talks schedule, posters will be displayed in the room over the 2 first days.

16 july - Morning: Faults and volcanoes and geothermal areas,  introduction, and NZ TVZ context

             08:45 - Welcome and coffee

     09:10 - Faults volcanoes and geothermal areas, a multiple scales problem, which modeling tools ?
                (Muriel Gerbault)

     09:40 - Large-scale interactions between magma, tectonics and fluids in the Taupō Volcanic Zone
                (Susan Ellis et al., Ellis Geodynamics)

     10:10 - Geothermal energy: where to drill when there are fractures everywhere?
                (Cécile Massiot et al., GNS)

             10:40 - Break 20 mns

     11:00 - Volcano-tectonic interactions in the Taupo Volcanic zone
                (Pilar Villamor et al., GNS)

     11:30 - Modelling fault rupture triggered by volcanic eruptions at the Okataina Volcanic Centre, New Zealand
                (Marta Béjar et al., IGME, Madrid)

     11:50 - Sudden Stress Field Flips as Triggers of Hydrothermal Fluid Instability
                (Gerd Sielfeld et al.,U. Auckland)

     12:10 -Wrap up NZ first summary, questions and technical issues

            12:30 - Lunch

16 july - Afternoon: The Chilean arc context + experimental & numerical studies

     13:30 - Nature of the interaction between tectonics, volcanism, and geothermal fluid flow in the Southern Andes: a multidisciplinary effort
                (José Cembrano, PUC)

     14:00 - Solid-fluid interactions on Earth: from geothermal systems to mantle strain localization
                 (Felipe Saez, U. Montpellier)

     14:20 -Interactions between megathrust and adjacent fault networks
                (Jorge Crempien, PUC)

     14:50 - The anisotropy of permeability under true triaxial stress states
                (Ashley Stanton-Younge, UK)

             15:10 - Break 20 mns

     15:30 - Stress-driven melt and gas extraction in crystal-rich mushes interacting with shear zones: an experimental approach
                 (Laurent Arbaret, ISTO)

     16:00 - Numerical modelling of multiphase flow, heat transfer and reactions in magmatic and siliciclastic reservoirs
                 (Daniel Kiss et al., IFE)

     16:30 - Modeling complex rheology at different time-space scales
                 (Evangelos Moulas et al., U. Mainz)

     17:00 - Discussions on Modeling & Rheology issues in these 2 topics (seismo-volcanics & Geothermals)

17 july - Morning: European hot areas (Geothermals) and modeling approaches in Volcanology

            08:45 : Welcome and Coffee

     09:10 - The French Massif Central geothermal resources : past exploration and current status
                 (Mathieu Bellanger, TLS Geothermics)

     09:40 - Insights gained from both fields structures and large-scale geotherms for deep geothermals
                 (Olivier Vanderhaeghe, GET)

     10:10 - Geothermal systems in orogenic contexts : from the Eastern Pyrénées to South Peru
                 (Audrey Taillefer, GET)

            10:40 - Break 20 mns

      11:00 - Damage, rock weakening and fluid interactions: from volcanism to induced seismicity
                 (Jean-Luc Got, U.Savoie Mt Blanc)

      11:30 - Resolving traction changes on fractures in a 3D heterogeneous crust using fictitious domains
                 (Valerie Cayol et al., LMV Clermont)

      12:00 - A space-time method for fluid flow and mass transport with discontinuous porosity distribution
                 (Simon Boisserée et al., U. Aachen)

      12:20 -Short discussion before Lunch

17 july - Afternoon: Seismo-volcanics, applications and more modeling studies

       13:30 - Insights from Magnetotellurics applied to studies of magmatic systems in Southern Peru.
                 (Svetlana Byrdina et al., ISTerre)

      14:00 - Analysis of the 2014 Mt. Pelée seismic unrest using RapidAligner Seismic: a data mining approach
                 (Ada Abboud et al., GET)

      14:20 - Volcano-Tectonic Interactions in El Salvador, Central America
                 (Carolina Canora et al., U.A.Madrid) 

             14:40 - Break 20 mns

      15:00 - A quasi-2D model of dike propagation with non-equilibrium magma crystallization
                 (Oleg Melnik,U.Oxford)

      15:30 - Heat induced volumetric deformation in geodynamic modeling
                 (Steve Tait, GET)       

      15:50 - Others & Posters session (check "Abstracts") :
               a-  Assessing Seismic Hazard in the Southern Andes: Effects of Deformation Partitioning, Heat and Fluid Flow in the Crust, Iturrieta et al., GFZ

               b-  Is stress monitoring able to forecast intrusions and slip events at the Piton de la Fournaise volcano ?, Dumont et al., LMV

               c-  Lateral fluid migration in the mantle wedge of subduction zones: the role of compaction-driven flow, Cerpa et al., U.Montpellier

               d- Evaluating the role of the upper plate tectonics on the position of arc volcanism, Bonnamy et al., U. Montpellier

               e- Modeling Dike propagation and volcano-tectonics interactions from the field, Ruz-Ginouves et al., U. Otago

               f- Melting of Host Rocks by a Shallow Sill Intrusion, Gerbault, Melnik, Borisova, GET & Oxford

     17:00 - Discussions and motivations for future collaborations, preparation of round tables for the day after

18-july - Morning: At GET/OMPLab location ; round tables and plans

            09:00 - Welcome

     09:30 - Round tables and syntheses on plans and wishes (white book):
                 1- sismo-volcanic risks,
                 2 -geothermals oriented.

          Lunch at CNRS restaurant.

Muriel Gerbault, Olivier Vanderhaeghe, Audrey Taillefer, Stéphanie Duchêne, José Cembrano, Cécile Massiot, Valérie Cayol, Ada Abboud, AnneMarie Cousin.