Mobilization of cryogenic ice in outer solar system satellites

Details Mobilization of cryogenic ice in outer solar system satellites Mobilization of cryogenic ice in outer solar system satellites

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.323...46s&link_type=abstract

Nature (ISSN 0028-0836), vol. 323, Sept. 4, 1986, p. 46-48.

Mathematics

Logic

22

Cryogenic Temperature, Ice, Uranus Satellites, Ariel, Cryogenic Fluids, Miranda, Viscosity, Water

Scientific paper

Voyager images of the uranian satellites show a diversity of geological features, including clear evidence for the 'softening' and mobilization of ice on Miranda and Ariel. The authors consider flow mechanisms that operate at very low temperature (T ≤ 100K). They propose here a form of pressure-solution creep, in which very fine-grained water ice or clathrate hydrate is mobilized by a small amount of intergranular cryogenic fluid (CH4, CO or N2). Viscosities as low as 1012P are possible for a limited time, sufficient to allow flooding of rift valleys and perhaps even substantial lateral flows.

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