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Outline

Outline. Normal Fault Systems and Kinematics. Planar Faults and Block Rotation Detachment Faulting Fault Linkage Kinematics of Normal Faulting. Development of Continental Rift into Ocean Basin. East African Rift Segmentation. Basin and Range Normal Fault Blocks.

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Outline

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  1. Outline Normal Fault Systems and Kinematics • Planar Faults and Block Rotation • Detachment Faulting • Fault Linkage • Kinematics of Normal Faulting

  2. Development of Continental Rift into Ocean Basin

  3. East African Rift Segmentation

  4. Basin and Range Normal Fault Blocks

  5. Rio Grande Rift Segmentation

  6. Death ValleyFault Zone and Stepover

  7. Closeup of Stepover

  8. Planar Normal Faults and Block Rotation

  9. Planar Normal Faults and Block Rotation

  10. Domino Block Example

  11. Domino Block Example

  12. Detachment Fault

  13. Detachment Fault

  14. Detachment Fault

  15. Soft-Linked Systems

  16. Kinematics of Normal Faulting • Domino, Bookshelf-Style Normal Faulting • Listric Normal Faulting with Reverse Drag • Imbricate Listric Normal Faulting • Inversion

  17. Domino-Style Normal Faulting

  18. Domino-Style Normal Faulting (bookshelf faulting) Occurs above Detachments

  19. Listric-Planar Normal Fault System ???

  20. Listric-Planar Normal Fault System L

  21. Listric Normal Faulting with Reverse Drag

  22. Listric Normal Faulting with Rollover Occurs due to space problem with curved detachment

  23. Imbricate Listric Normal Faulting Synthetic faults also accommodate collapse of HW block

  24. Imbricate Listric Normal Faulting “Meatslices common in large displacement systems

  25. Inversion • Normal faulting • Syn-tectonic deposition of B • Post-tectonic deposition of C

  26. Inversion • Normal faulting • Syn-tectonic deposition of B • Post-tectonic deposition of C • Thrust faulting • Deformation of B and folding of C

  27. References Slides 1, 20, 21 Twiss, R. J. and E. M. Moores, Structural Geology, W. H. Freeman & Co., New York, 532 p., 1992. Slides 3-6 http://earth.leeds.ac.uk/faults/normal/domino.htm Slides 7-9 http://earth.leeds.ac.uk/faults/normal/detachment1.htm Slide 10 http://earth.leeds.ac.uk/faults/soft/softnormal.htm Slides 12-19 Davis. G. H. and S. J. Reynolds, Structural Geology of Rocks and Regions, 2nd ed., John Wiley & Sons, New York, 776 p., 1996.

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