Tidal Walking on Europa's Strike-Slip Faults-Insight From Numerical Modeling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421095" target="_blank" >RIV/00216208:11320/20:10421095 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TRFpKaYYig" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TRFpKaYYig</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2019JE006327" target="_blank" >10.1029/2019JE006327</a>
Alternative languages
Result language
angličtina
Original language name
Tidal Walking on Europa's Strike-Slip Faults-Insight From Numerical Modeling
Original language description
Tidal walking has been proposed as a mechanism inducing lateral offset on preexisting strike-slip faults on Europa by tidal forcing. We test this hypothesis numerically by modeling a part of Europa's ice shell with an embedded strike-slip fault. Our model involves two coupled processes: (i) slip at the fault and deformation of the ice shell on the tidal timescale and (ii) thermal evolution of the ice shell on the timescale of tens of thousands of years. The fault is characterized by the Mohr-Coulomb criterion allowing to determine self-consistently the activation depth of the fault. On the tidal timescale, the ice shell is described by the Maxwell viscoelasticity; on the convection timescale, the ice is treated as a non-Newtonian viscous fluid. We show that tidal walking is capable of producing surface lateral offset of the order of kilometers over 100 thousand years provided that the active part of the fault penetrates the high-viscosity part of the shell. Such conditions are likely not met for the current amplitude of the tidal forcing and for the estimated ice shell thickness. We show that either larger forcing amplitude (e.g., due to higher eccentricity of the moon) or partial flooding of the fault zone by water from the ocean is required to produce the observed offset. We demonstrate that thermo-mechanical coupling can significantly enhance the efficiency of tidal walking and we investigate conditions for which the fault's activity can result in observable surface thermal signatures.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GA19-10809S" target="_blank" >GA19-10809S: Thermomechanical processes in icy moons - insight from numerical modeling</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research: Planets
ISSN
2169-9097
e-ISSN
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Volume of the periodical
125
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
24
Pages from-to
e2019JE006327
UT code for WoS article
000566216900029
EID of the result in the Scopus database
2-s2.0-85089833820