Working Group 1

​Working Group Leaders:

• Dr. Pierre Henry

• Dr. Luis Matias

 

Seismicity and fluid at TTPBs: field data and modeling

​Central Themes and Questions:

• How does the geodynamic context determine the initiation and evolution of TTPBs?
• How are chemical, thermal and mechanical heterogeneities created in the lithosphere, and how do they influence the distribution of deformation and seismicity?
• What are the interactions between magmatism and faulting at TTPBs?
• How is seismicity distributed along TTPBs, and how do characteristics of seismicity (e.g. magnitude, focal mechanisms, foreshock activity) vary with age and slip rate?
• What are the characteristics (alteration, porosity and permeability) of old undeformed oceanic lithosphere?
• How does oceanic material (e.g. ophiolitic sutures) affect mechanical properties, seismicity and creep?
• What is the origin of fluids, and to what extent does depth of penetration, mixing and chemical composition vary along TTPBs?
• How does hydrothermal fluid flow interact with fault structure and seismicity?