Stress estimations from fault geometries applied to sand-box accretionary wedges

Details Stress estimations from fault geometries applied to sand-box accretionary wedges Stress estimations from fault geometries applied to sand-box accretionary wedges

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1087k&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 6, p. 1087-1090

Physics

3

Structural Geology: Fractures And Faults, Structural Geology: Mechanics, Tectonophysics: Continental Contractional Orogenic Belts, Tectonophysics: Stresses-General

Scientific paper

Analysis of stress distribution along imbricate surfaces within a sand-box model of an accretionary wedge is used to calculate the condition for slip along an active frontal fault and the basal dećollement. The same theory is applied for finding the stress limit that allows formation of a new fault in front of the sand wedge. When this stress limit is reached, the sole thrust propagates rapidly forward along the basal dećollement and a new fault is created. Comparison between theory and experiment shows that stresses would be underestimated, if compaction of the shortened layer is not accounted for in the calculations.

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