Quasi-static analysis of strike fault growth in layered media

Nobuki Kame, Shuji Saito, Kenji Oguni

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We study the effects of structural inhomogeneity on the quasi-static growth of strike-slip faults. A layered medium is considered, made up of an upper layer bounded by a free surface and welded to a lower half-space with different elastic property. Mode III crack is employed as a mathematical model of strike-slip fault, which is nucleated in the lower half-space and then propagates towards the interface. We adopt FEM-β, newly proposed analysis method for failure, to simulate the quasi-statistic crack growth governed by the stress distribution in layered media. Our results show that along planar traces across interfaces a compliant upper layer has significant effects on promoting/ suppressing crack growth before/after its extension into the layer and vice versa for a rigid one. This proposes a possibility that surface breaks due to strike-slip faulting could be arrested by deposit layers at the topmost part of the Earth's crust.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalGeophysical Journal International
Volume173
Issue number1
DOIs
Publication statusPublished - 2008 Apr

Keywords

  • Dynamics and mechanics of faulting
  • Earthquake dynamics
  • Fracture and faults
  • Mechanics, theory and modelling
  • Numerical solutions

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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