A note on pore fluid pressure ratios in the Coulomb wedge theory

Details A note on pore fluid pressure ratios in the Coulomb wedge theory A note on pore fluid pressure ratios in the Coulomb wedge theory

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3319310w&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 19, CiteID L19310

Physics

2

Structural Geology: Dynamics And Mechanics Of Faulting (8118), Structural Geology: Mechanics, Theory, And Modeling, Structural Geology: Role Of Fluids, Structural Geology: Rheology And Friction Of Fault Zones (8163), Tectonophysics: Stresses: Crust And Lithosphere

Scientific paper

The widely used exact Coulomb-wedge stress solution presented by F. A. Dahlen contains an approximation in dealing with pore fluid pressure ratios within the wedge and in the basal fault. We discuss the theoretical and practical ramifications of the approximation and propose simple modifications to make the solution exact. We illustrate that errors caused by the approximation are negligible for taper angles less than about 10° but become significant for larger tapers.

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