Outline n Normal Fault Systems and Kinematics Planar

Outline n. 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

Rio Grande Rift Segmentation

Death Valley Fault Zone and Stepover

Closeup of Stepover

Planar Normal Faults and Block Rotation

Planar Normal Faults and Block Rotation

Domino Block Example

Domino Block Example

Detachment Fault

Detachment Fault

Detachment Fault

Soft-Linked Systems

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

Domino-Style Normal Faulting

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

Listric-Planar Normal Fault System ? ? ?

Listric-Planar Normal Fault System L

Listric Normal Faulting with Reverse Drag

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

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

Imbricate Listric Normal Faulting “Meatslices common in large displacement systems

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

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

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/detachment 1. htm Slide 10 http: //earth. leeds. ac. uk/faults/softnormal. htm Slides 12 -19 Davis. G. H. and S. J. Reynolds, Structural Geology of Rocks and Regions, 2 nd ed. , John Wiley & Sons, New York, 776 p. , 1996.