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.

Besides the main talks schedule proposed below, space and time will be made for posters display in the room.

! PLEASE REGISTER, so we can calibrate invoices.. and Montempo hotel prefers early booking... Thanks !

Abstracts can be updated any time,  Comments introducing ones areas of interest are welcome for people to get to know each other. Thanks!

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

             09:00 - Welcome and coffee

     09:30 - Faults volcanoes and geothermal areas, a multiple scales problem, which modeling tools ?
               (Muriel Gerbault)

     10:00 - Volcano-tectonic interactions in the Taupo Volcanic zone
               (Pilar Villamor, GNS)

     10:30 - Geothermal view point, fractures and where to drill next
               (Cécile Massiot, GNS)

             11:00 - Break 15 mns

     11:15 - Large-scale interactions between magma, tectonics and fluids in the Taupo Volcanic Zone
               (Susan Ellis, Ellis Geodynamics)

     11:45 - Short talks on volcanism and seismology throughout New Zealand
               (Javi Ruz-Ginouves, U. Otago, Gerd Sielfeld,U. Auckland )

     12:15 - First series of questions / discussions

16 july - Afternoon: Zoom on the Chilean arc context + experimental studies

     13:30 - The Chilean structural setting: field observations and the key of faults intersections
               (José Cembrano, PUC)

     14:00 - Seismology models and data, subduction plane and crustal seismicity
               (Jorge Crempien, PUC)

     14:30 - Cracks, fluids and tectonics 
               (David Healy, Leeds)

             15:00 - Break 20 mns

     15:20 - Rheologies at the Brittle-Ductile transition from lab experiments
                (Laurent Arbaret, ISTO)

     15:50 - The anisotropy of permeability under true triaxial stress states
                (Ashley Stanton-Younge, UK, Karin Hofer ?, Lausanne)

     16:20 - Modeling complex rheology at different time-space scales
                (Evangelos Moulas, U. Mainz)

     16:50 - A space-time method for fluid flow and mass transport with discontinuous porosity distribution
                (Simon Boisserée, U. Aachen)

     17:15 - Discussions on Rheology issues in these 2 topics (seismo-volcanics & Geothermals)

17 july - Morning: Zoom on European hot areas (Geothermals) and various modeling approaches

            09:00 : Welcome and coffee

     09:30 - Geothermal and geophysical studies in Peru and Pyrenees
                (Audrey Taillefer, GET)

     10:00 - Massif Central and french projects on deep geothermals
                (Olivier Vanderhaeghe, GET, Mathieu Bellanger, TLS Geothermics)

     10:30 - Insights from Magnetotellurics applied thoughrout various sites in Europe & elsewhere
                (Svetlana Byrdina, ISTerre)

            11:00 - Break 15 mns

      11:20 - Damage, rock weakening: from volcanism to induced seismicity
                (Jean-Luc Got, U.Savoie Mt Blanc)

      11:40 - Resolving traction changes on fractures in a 3D heterogeneous crust using fictitious domains
                (Valerie Cayol, LMV Clermont)

      11:45 - Two phase flow modeling in fuid reservoir contexts
                (Daniel Kiss, IFE)

     12:15 - Modeling questions and answers from geophysics: 1; geodetics, 2: seismo-volcanic risks

17 july - Afternoon: Numerical methods + seismo-volcanics

    13:30 - Two phase flow modeling with a poro-elasto-plastic approach
                (Felipe Saez, U. Montpellier)

    13:50 - Volcano seismology and machine learning methods 
                (Ada Abboud, GET)

    14:10 - Heat production in geodynamic modeling 
                (Steve Tait, GET)

    14:30 - InsaR& GNSS data and modeling volcano-tectonics in Norhern Chile & New Zealand
                (Marta Béjar, IGME, Madrid)

             15:00 - Break 20 mns

    15:20 - Hydrothermal fluid circulations and active faults in El Salvador
                (Carolina Canora, U.Madrid)

    15:40 - talks to be refined (Oleg Melnik,U.Oxford, Simon Schörn, U.Mainz, J. Browning ?, UK)
             

    16:30 - Posters session
             

    17:15 - 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.