Fault tectonics and deformation: a method of quantification using field data

Details Fault tectonics and deformation: a method of quantification using field data Fault tectonics and deformation: a method of quantification using field data

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..74..137g&link_type=abstract

Earth and Planetary Science Letters, Volume 74, Issue 1, p. 137-148.

Computer Science

4

Scientific paper

A new method for analysing fault populations in terms of infinitesimal strain is discussed. A fractured rock volume taken as a whole can be considered to be affected by continuous deformation provided fault offsets are small compared to its size. Each fault then acts as a penetrative simple shear, we combine N simple shears to define an average deformation ellipsoid for the given faulted volume. The method has been tested using accurate fault slip data collected in two superposed levels of coal mines of the Lorraine Basin. The studied rock volume has been affected by extensional phenomena during Permo-Triassic. Results show that within a major tilted block, the average deformation corresponds to E-W extension with a total factor of extension of 1.03. This result is in good agreement with independent estimates.

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