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J. H. Stewart, 1978 .

J. H. Stewart, 1978. Boillot 1985. Manatschal & Bernoulli 1999. Fault Modeling Challenges. Rheology and the link to fault geometry 2D 3D Models of fault patterns. Biggest Problem For Extensional Models: 95% of models are amagmatic 95% of plate separation is by dikes

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J. H. Stewart, 1978 .

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  1. J. H. Stewart, 1978.

  2. Boillot 1985 Manatschal & Bernoulli 1999

  3. Fault Modeling Challenges Rheology and the link to fault geometry 2D 3D Models of fault patterns

  4. Biggest Problem For Extensional Models: • 95% of models are amagmatic • 95% of plate separation is by dikes - both for ridges and rifts

  5. Coupled modeling of faulting and magmatic processes (an alternative)

  6. System response to a single dyke event Maximum shear stress (Deviatoric stress) Changes due to a dyke event Opening of the axis Surface Deformation Uplift Horizontal extension

  7. System response to a single dyke event Downward penetration of dyke Dyke thickness

  8. Big Challenge for Extensional Modeling • 3D Dike and fault propagation • Distance of dike propagation • Effect of dike stress changes on fault patterns • Thermal effect of diking

  9. Coupled modeling of faulting and magmatic processes A dyke breaks out Magmatic accretion Dyke is modeled by Boundary Element Program TWODD. Deformation and stress change are feed back to FLAC Tectonic Stretching Normal faults form, modeled by Finite Difference Program FLAC. Strain rate imposed on meshes (denser meshes at the axis)

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