The depth of seismic faulting and the upper transition from stable to unstable slip regimes

Chris J. Marone, C. H. Scholz

Research output: Contribution to journalArticle

252 Citations (Scopus)

Abstract

A number of observations indicate that an upper stability transition occurs along well‐developed faults, such as the San Andreas, as a result of unconsolidated gouge within shallow regions of these faults. These observations include the depth distribution of seismicity along faults with and without well‐developed gouge zones, correlations between seismicity and shallow crustal structure, and modeling of coseismic and post‐seismic slip. In addition, recent experimental friction studies indicate that thick layers of simulated gouge exhibit a positive slip‐rate dependence of frictional resistance (velocity strengthening) and thus inherently stable slip, whereas bare rock surfaces and thin gouge layers exhibit potentially unstable velocity weakening behavior. Subduction zones with large accretionary wedges also exhibit an upper stability transition in that slip is aseismic within the accretionary wedge. A stability transition due to the presence of unconsolidated material can also be invoked in this case.

Original languageEnglish (US)
Pages (from-to)621-624
Number of pages4
JournalGeophysical Research Letters
Volume15
Issue number6
DOIs
StatePublished - Jan 1 1988

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faulting
slip
accretionary prism
wedges
seismicity
crustal structure
subduction zone
vertical distribution
friction
rocks
rock
modeling
material

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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abstract = "A number of observations indicate that an upper stability transition occurs along well‐developed faults, such as the San Andreas, as a result of unconsolidated gouge within shallow regions of these faults. These observations include the depth distribution of seismicity along faults with and without well‐developed gouge zones, correlations between seismicity and shallow crustal structure, and modeling of coseismic and post‐seismic slip. In addition, recent experimental friction studies indicate that thick layers of simulated gouge exhibit a positive slip‐rate dependence of frictional resistance (velocity strengthening) and thus inherently stable slip, whereas bare rock surfaces and thin gouge layers exhibit potentially unstable velocity weakening behavior. Subduction zones with large accretionary wedges also exhibit an upper stability transition in that slip is aseismic within the accretionary wedge. A stability transition due to the presence of unconsolidated material can also be invoked in this case.",
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The depth of seismic faulting and the upper transition from stable to unstable slip regimes. / Marone, Chris J.; Scholz, C. H.

In: Geophysical Research Letters, Vol. 15, No. 6, 01.01.1988, p. 621-624.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The depth of seismic faulting and the upper transition from stable to unstable slip regimes

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AB - A number of observations indicate that an upper stability transition occurs along well‐developed faults, such as the San Andreas, as a result of unconsolidated gouge within shallow regions of these faults. These observations include the depth distribution of seismicity along faults with and without well‐developed gouge zones, correlations between seismicity and shallow crustal structure, and modeling of coseismic and post‐seismic slip. In addition, recent experimental friction studies indicate that thick layers of simulated gouge exhibit a positive slip‐rate dependence of frictional resistance (velocity strengthening) and thus inherently stable slip, whereas bare rock surfaces and thin gouge layers exhibit potentially unstable velocity weakening behavior. Subduction zones with large accretionary wedges also exhibit an upper stability transition in that slip is aseismic within the accretionary wedge. A stability transition due to the presence of unconsolidated material can also be invoked in this case.

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