Nucleation and growth of dip-slip faults in a stable craton

M. H. Wallace, John M Kemeny

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Analyzes the conditions for nucleation of a dip-slip fault in intact crust and its subsequent growth using linear elastic fracture mechanics and the finite element method. It is assumed that a fault can be modeled as a mode II shear crack in a layered elastic crust, and fault behaviour under conditions of a variable dip and shear fracture energy are investigated. It is suggested that fault nucleation and growth are a stable process which would preferentially occur by rupturing downward under stable conditions. Rerupturing of an established fault may initiate at depth or the surface depending on the degree of healing between rupture events and the tectonic stress available. A vast majority of shallow crustal earthquakes nucleate at the base of the seismogenic zone and rupture upwards. This suggests that most events are a reactivation of an old established fault and not growth of a new or developing fault. -from Authors

Original languageEnglish (US)
Pages (from-to)7145-7157
Number of pages13
JournalJournal of Geophysical Research: Space Physics
Volume97
Issue numberB5
StatePublished - 1992
Externally publishedYes

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Fault slips
dip-slip fault
cratons
nucleation
craton
slip
Nucleation
crusts
shear
rupturing
Fracture energy
fracture mechanics
healing
Tectonics
Fracture mechanics
rupture
tectonics
Earthquakes
finite element method
earthquakes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Nucleation and growth of dip-slip faults in a stable craton. / Wallace, M. H.; Kemeny, John M.

In: Journal of Geophysical Research: Space Physics, Vol. 97, No. B5, 1992, p. 7145-7157.

Research output: Contribution to journalArticle

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