Morphologic dating of fault scarps using airborne laser swath mapping (ALSM) data

G. E. Hilley, S. Delong, C. Prentice, K. Blisniuk, Ramon Arrowsmith

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Models of fault scarp morphology have been previously used to infer the relative age of different fault scarps in a fault zone using labor-intensive ground surveying. We present a method for automatically extracting scarp morphologic ages within high-resolution digital topography. Scarp degradation is modeled as a diffusive mass transport process in the across-scarp direction. The second derivative of the modeled degraded fault scarp was normalized to yield the best-fitting (in a least-squared sense) scarp height at each point, and the signal-to-noise ratio identified those areas containing scarp-like topography. We applied this method to three areas along the San Andreas Fault and found correspondence between the mapped geometry of the fault and that extracted by our analysis. This suggests that the spatial distribution of scarp ages may be revealed by such an analysis, allowing the recent temporal development of a fault zone to be imaged along its length.

Original languageEnglish (US)
Article numberL04301
JournalGeophysical Research Letters
Volume37
Issue number4
DOIs
StatePublished - Feb 2010

Fingerprint

airborne lasers
escarpments
dating
fault scarp
topography
laser
San Andreas Fault
labor
fault zone
spatial distribution
signal to noise ratios
degradation
mass transport
transport process
signal-to-noise ratio
surveying
high resolution
geometry
method
analysis

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Morphologic dating of fault scarps using airborne laser swath mapping (ALSM) data. / Hilley, G. E.; Delong, S.; Prentice, C.; Blisniuk, K.; Arrowsmith, Ramon.

In: Geophysical Research Letters, Vol. 37, No. 4, L04301, 02.2010.

Research output: Contribution to journalArticle

Hilley, G. E. ; Delong, S. ; Prentice, C. ; Blisniuk, K. ; Arrowsmith, Ramon. / Morphologic dating of fault scarps using airborne laser swath mapping (ALSM) data. In: Geophysical Research Letters. 2010 ; Vol. 37, No. 4.
@article{99b428fa2f0d40cf8bbd0aa9e27ef78d,
title = "Morphologic dating of fault scarps using airborne laser swath mapping (ALSM) data",
abstract = "Models of fault scarp morphology have been previously used to infer the relative age of different fault scarps in a fault zone using labor-intensive ground surveying. We present a method for automatically extracting scarp morphologic ages within high-resolution digital topography. Scarp degradation is modeled as a diffusive mass transport process in the across-scarp direction. The second derivative of the modeled degraded fault scarp was normalized to yield the best-fitting (in a least-squared sense) scarp height at each point, and the signal-to-noise ratio identified those areas containing scarp-like topography. We applied this method to three areas along the San Andreas Fault and found correspondence between the mapped geometry of the fault and that extracted by our analysis. This suggests that the spatial distribution of scarp ages may be revealed by such an analysis, allowing the recent temporal development of a fault zone to be imaged along its length.",
author = "Hilley, {G. E.} and S. Delong and C. Prentice and K. Blisniuk and Ramon Arrowsmith",
year = "2010",
month = "2",
doi = "10.1029/2009GL042044",
language = "English (US)",
volume = "37",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "4",

}

TY - JOUR

T1 - Morphologic dating of fault scarps using airborne laser swath mapping (ALSM) data

AU - Hilley, G. E.

AU - Delong, S.

AU - Prentice, C.

AU - Blisniuk, K.

AU - Arrowsmith, Ramon

PY - 2010/2

Y1 - 2010/2

N2 - Models of fault scarp morphology have been previously used to infer the relative age of different fault scarps in a fault zone using labor-intensive ground surveying. We present a method for automatically extracting scarp morphologic ages within high-resolution digital topography. Scarp degradation is modeled as a diffusive mass transport process in the across-scarp direction. The second derivative of the modeled degraded fault scarp was normalized to yield the best-fitting (in a least-squared sense) scarp height at each point, and the signal-to-noise ratio identified those areas containing scarp-like topography. We applied this method to three areas along the San Andreas Fault and found correspondence between the mapped geometry of the fault and that extracted by our analysis. This suggests that the spatial distribution of scarp ages may be revealed by such an analysis, allowing the recent temporal development of a fault zone to be imaged along its length.

AB - Models of fault scarp morphology have been previously used to infer the relative age of different fault scarps in a fault zone using labor-intensive ground surveying. We present a method for automatically extracting scarp morphologic ages within high-resolution digital topography. Scarp degradation is modeled as a diffusive mass transport process in the across-scarp direction. The second derivative of the modeled degraded fault scarp was normalized to yield the best-fitting (in a least-squared sense) scarp height at each point, and the signal-to-noise ratio identified those areas containing scarp-like topography. We applied this method to three areas along the San Andreas Fault and found correspondence between the mapped geometry of the fault and that extracted by our analysis. This suggests that the spatial distribution of scarp ages may be revealed by such an analysis, allowing the recent temporal development of a fault zone to be imaged along its length.

UR - http://www.scopus.com/inward/record.url?scp=77649098119&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77649098119&partnerID=8YFLogxK

U2 - 10.1029/2009GL042044

DO - 10.1029/2009GL042044

M3 - Article

AN - SCOPUS:77649098119

VL - 37

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 4

M1 - L04301

ER -