Tidally driven strike slip displacement on Europa: Viscoelastic modeling

Details Tidally driven strike slip displacement on Europa: Viscoelastic modeling Tidally driven strike slip displacement on Europa: Viscoelastic modeling

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007p%26ss...55.1225p&link_type=abstract

Planetary and Space Science, Volume 55, Issue 10, p. 1225-1245.

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Scientific paper

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.

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