The origin of domes on Europa: The role of thermally induced compositional diapirism

Details The origin of domes on Europa: The role of thermally induced compositional diapirism The origin of domes on Europa: The role of thermally induced compositional diapirism

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3101701p&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 1, CiteID L01701

Physics

18

Planetary Sciences: Interiors (8147), Planetary Sciences: Origin And Evolution, Planetology: Solar System Objects: Jovian Satellites

Scientific paper

The surface of Jupiter's moon Europa is peppered by topographic domes, interpreted as sites of intrusion and extrusion. Diapirism is consistent with dome morphology, but thermal buoyancy alone cannot produce sufficient driving pressures to create the observed dome elevations. Instead, diapirs may initiate by thermal convection that induces compositional segregation. Exclusion of impurities from warm upwellings allows sufficient buoyancy for icy plumes to create the observed surface topography, provided the ice shell has a small effective elastic thickness (~0.2 to 0.5 km) and contains low-eutectic-point impurities at the few percent level. This model suggests that the ice shell may be depleted in impurities over time.

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