Krustenverformung durch schräge Subduktion: Eine Fallstudie in Nicaragua
Final Report Abstract
The project was devoted to the processes related to oblique subduction in Nicaragua and was realised at two institutes: one year at the Geodesy Laboratory at Miami University and one year at the department of geodynamics at GFZ Potsdam. Following the reviewers' recommendations, the strategy of the Nicaragua proposal which was initially very broad was reconsidered depending on two main aspects: 1) the future plans and 2) the progressive development of numerical modelling techniques. In other words, the project was part of a long-term plan toward the understanding of the forearc and arc permanent deformation and the relationship to the temporary, elastic deformation and subduction earthquakes. Secondly, for a deep understanding of the processes and parameters in play, the working method was to start from simple models to complex ones. Accordingly, this works focused first on the reactivation of the structures in the Nicaragua volcanic arc based on seismic and geological data and Coulomb stress calculations. The main question treated was: what is the relationship of the fault activity in the arc a) to the subduction earthquakes and b) to the long-term shear deformation as evidenced by the GPS data? The second studied aspect was the formation of upper plate structures in relationship to the coupling at the subduction interface. Elastoplastic models of the Nicaragua forearc deformation was developed and constrained by various geophysical and geological data.
Publications
- Deformation of the volcanic arc in Nicaragua: Finite Element modeling of an oblique convergence zone. EGU April 2004
Cailleau B., La Femina P.C. and Dixon T.H.
- The formation of bookshelf faults: A case study from the volcanic arc of an oblique convergent margin, Nicaragua. EGU April 2005
Cailleau B., La Femina P.C. and Dixon T.H.
- Combining short and long-term deformations in the Central Andes using Finite Element modeling. DGG March 2006
Cailleau B., N. Kukowksi, J. Klotz and S. Wdowinski
- Short and long-term stress transfer from the subduction interface to the Central Andes. EGU April 2006
Cailleau B. and N. Kukowski
- (2007). Formation of the double rift system in the Thaumasia Highlands, Mars. J. Geophys. Res., 112, E06006
Grott M., Kronberg P., Hauber E. and Cailleau B.
(See online at https://doi.org/10.1029/2006JE002800) - Stress accumulation between volcanoes: An explanation for intra-arc earthquakes in Nicaragua?. Geophysical Journal International, 169(3), 1132-1138, 2007
Cailleau B., La Femina P.C. and Dixon T.H.
