Tidally driven strike-slip displacement on Europa

Viscoelastic modeling

Brandon Preblich, Richard J. Greenberg, Jeannie Riley, David O'Brien

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The process of tide-driven walking, proposed as a major mechanism for strike-slip displacement on Europa, is modeled using a finite-element numerical simulation of the behavior of viscoelastic material. For material parameters that are plausible for the water ice composing Europa's crust, the simulation confirms earlier analytic results for strike-slip displacement along a crack that penetrates down to the liquid water substrate. The finite element code permits testing other cases as well. Of considerable interest is whether tidal walking can operate if a crack penetrates not to liquid but only as far as warm, relatively viscous ice. In such a case, significant displacement can be driven, but only if the threshold value of the compressive force needed to lock the fault is near the value of the overburden stress at the bottom of the crack. Such special conditions are not needed for displacement if the crack penetrates to the underlying ocean.

Original languageEnglish (US)
Pages (from-to)1225-1245
Number of pages21
JournalPlanetary and Space Science
Volume55
Issue number10
DOIs
StatePublished - Jul 2007

Fingerprint

Europa
crack
slip
cracks
walking
modeling
ice
liquid
tides
liquids
overburden
water
simulation
crusts
oceans
tide
crust
substrate
thresholds
ocean

Keywords

  • Europa
  • Geological processes
  • Ice mechanics
  • Tectonics
  • Tides

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Tidally driven strike-slip displacement on Europa : Viscoelastic modeling. / Preblich, Brandon; Greenberg, Richard J.; Riley, Jeannie; O'Brien, David.

In: Planetary and Space Science, Vol. 55, No. 10, 07.2007, p. 1225-1245.

Research output: Contribution to journalArticle

Preblich, Brandon ; Greenberg, Richard J. ; Riley, Jeannie ; O'Brien, David. / Tidally driven strike-slip displacement on Europa : Viscoelastic modeling. In: Planetary and Space Science. 2007 ; Vol. 55, No. 10. pp. 1225-1245.
@article{e37b9ee0895542b0a1dea56e89173a00,
title = "Tidally driven strike-slip displacement on Europa: Viscoelastic modeling",
abstract = "The process of tide-driven walking, proposed as a major mechanism for strike-slip displacement on Europa, is modeled using a finite-element numerical simulation of the behavior of viscoelastic material. For material parameters that are plausible for the water ice composing Europa's crust, the simulation confirms earlier analytic results for strike-slip displacement along a crack that penetrates down to the liquid water substrate. The finite element code permits testing other cases as well. Of considerable interest is whether tidal walking can operate if a crack penetrates not to liquid but only as far as warm, relatively viscous ice. In such a case, significant displacement can be driven, but only if the threshold value of the compressive force needed to lock the fault is near the value of the overburden stress at the bottom of the crack. Such special conditions are not needed for displacement if the crack penetrates to the underlying ocean.",
keywords = "Europa, Geological processes, Ice mechanics, Tectonics, Tides",
author = "Brandon Preblich and Greenberg, {Richard J.} and Jeannie Riley and David O'Brien",
year = "2007",
month = "7",
doi = "10.1016/j.pss.2007.01.018",
language = "English (US)",
volume = "55",
pages = "1225--1245",
journal = "Planetary and Space Science",
issn = "0032-0633",
publisher = "Elsevier Limited",
number = "10",

}

TY - JOUR

T1 - Tidally driven strike-slip displacement on Europa

T2 - Viscoelastic modeling

AU - Preblich, Brandon

AU - Greenberg, Richard J.

AU - Riley, Jeannie

AU - O'Brien, David

PY - 2007/7

Y1 - 2007/7

N2 - The process of tide-driven walking, proposed as a major mechanism for strike-slip displacement on Europa, is modeled using a finite-element numerical simulation of the behavior of viscoelastic material. For material parameters that are plausible for the water ice composing Europa's crust, the simulation confirms earlier analytic results for strike-slip displacement along a crack that penetrates down to the liquid water substrate. The finite element code permits testing other cases as well. Of considerable interest is whether tidal walking can operate if a crack penetrates not to liquid but only as far as warm, relatively viscous ice. In such a case, significant displacement can be driven, but only if the threshold value of the compressive force needed to lock the fault is near the value of the overburden stress at the bottom of the crack. Such special conditions are not needed for displacement if the crack penetrates to the underlying ocean.

AB - The process of tide-driven walking, proposed as a major mechanism for strike-slip displacement on Europa, is modeled using a finite-element numerical simulation of the behavior of viscoelastic material. For material parameters that are plausible for the water ice composing Europa's crust, the simulation confirms earlier analytic results for strike-slip displacement along a crack that penetrates down to the liquid water substrate. The finite element code permits testing other cases as well. Of considerable interest is whether tidal walking can operate if a crack penetrates not to liquid but only as far as warm, relatively viscous ice. In such a case, significant displacement can be driven, but only if the threshold value of the compressive force needed to lock the fault is near the value of the overburden stress at the bottom of the crack. Such special conditions are not needed for displacement if the crack penetrates to the underlying ocean.

KW - Europa

KW - Geological processes

KW - Ice mechanics

KW - Tectonics

KW - Tides

UR - http://www.scopus.com/inward/record.url?scp=34447130886&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447130886&partnerID=8YFLogxK

U2 - 10.1016/j.pss.2007.01.018

DO - 10.1016/j.pss.2007.01.018

M3 - Article

VL - 55

SP - 1225

EP - 1245

JO - Planetary and Space Science

JF - Planetary and Space Science

SN - 0032-0633

IS - 10

ER -