The effect of inplane force variations on a faulted elastic thin-plate, implications for rifted sedimentary basins

Details The effect of inplane force variations on a faulted elastic thin-plate, implications for rifted sedimentary basins The effect of inplane force variations on a faulted elastic thin-plate, implications for rifted sedimentary basins

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3903v&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 20, p. 3903-3906

Physics

5

Structural Geology: Fractures And Faults, Tectonophysics: Continental Margins And Sedimentary Basins

Scientific paper

Studies of flexural motions of lithosphere commonly apply a differential equation based on the thin-plate approach. In this approximation, the flexural response to a changing horizontal inplane force depends only on the curvature of the midplane of the thin-plate representing the mechanical behavior of the lithosphere. However, in cases where an abrupt change of the geometry of the lithosphere occurs the midplane of the thin-plate is offset. We demonstrate that the combination of the offset with an inplane horizontal force produces an additional, rheology independent moment at the position of the geometry change. This effect has been overlooked by previous studies of lithosphere deflections, and thin-plate problems in general. In the presented analysis, the thin-plate with an abrupt change in plate geometry represents lithosphere with a mechanically healed, inactive fault. However, the derived analytical solutions are general and can be used to study problems with similar abrupt geometry changes.

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