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Numerical modeling and GPS bring unexpected extension to light in the NW Iran

Numerical modeling and GPS bring unexpected extension to light in the NW Iran. Philippe Vernant. GPS velocity field in Iran with respect to Eurasia. IIEES. NCC. Ph. Vernant - GSI – June 2007. GPS velocity field in Iran with respect to the Central Iranian Block. IIEES. NCC.

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Numerical modeling and GPS bring unexpected extension to light in the NW Iran

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  1. Numerical modeling and GPS bring unexpected extension to light in the NW Iran Philippe Vernant

  2. GPS velocity field in Iran with respect to Eurasia IIEES NCC Ph. Vernant - GSI – June 2007

  3. GPS velocity field in Iran with respect to the Central Iranian Block IIEES NCC Ph. Vernant - GSI – June 2007

  4. GPS velocity field in Iran with respect to Eurasia IIEES NCC

  5. Linear increase of the velocities from the Black Sea to the Caspian Sea WNW ESE IIEES NCC

  6. GPS, seismic cycle and fault slip rate Interseismic Coseismic Geologic + =

  7. Interseismic modeling vl vl = (Vp /π) arctan (x/P) Savage and Burford, 1973 x

  8. Block modeling of the NW Iranian deformation Ph. Vernant - GSI – June 2007

  9. Block modeling of the NW Iranian deformation Ph. Vernant - GSI – June 2007

  10. Ph. Vernant - GSI – June 2007

  11. Equilibrium equations Boundary conditions Constitutive laws Initial conditions Numerical modeling of the earth dynamic

  12. GPS velocity field with respect to Arabia McClusky et al. (2000; 2003), Vernant et al. (2004)

  13. The Arabian plate motion seems constant since at least 10 Ma

  14. 3D numerical modeling

  15. Ph. Vernant - GSI – June 2007 Strain rate and velocity field Instrumental seismicity (Engdahl et al. 1998)

  16. Two end member models Ph. Vernant - GSI – June 2007 Ph. Vernant - GSI – June 2007

  17. What can we learn from geodynamic reconstructions

  18. Slab pull effects could explain the GPS and geological observations, but more work is needed … Ph. Vernant - GSI – June 2007 Ph. Vernant - GSI – June 2007

  19. Thank you Ph. Vernant - GSI – June 2007

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