Three-dimensional displacement-length scaling and maximum dimension of normal faults in layered rocks

Details Three-dimensional displacement-length scaling and maximum dimension of normal faults in layered rocks Three-dimensional displacement-length scaling and maximum dimension of normal faults in layered rocks

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3216302s&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 16, CiteID L16302

Physics

5

Structural Geology: Fractures And Faults, Structural Geology: Mechanics, Theory, And Modeling, Structural Geology: Dynamics And Mechanics Of Faulting (8118), Tectonophysics: Continental Tectonics: Extensional (0905)

Scientific paper

We analyze the magnitudes and distributions of displacements on normal faults that are contained within a five layer marly-limestone/silty-clay sedimentary sequence. Observations of bedding plane exposures of the well-exposed mechanically isolated faults reveal a systematic strong decrease in the displacement gradient related to the horizontal lengthening of faults growing at constant height. Because mechanically heterogeneous sequences produce populations of vertically restricted faults having a large range of aspect ratios (length/downdip height), much of the scatter on a displacement-length diagram can be attributed to nonlinear growth paths. Our results demonstrate the significant influence of layering on fault scaling relations, growth, and maximum dimensions.

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