The tectonic and volcanic history of Dione

Details The tectonic and volcanic history of Dione The tectonic and volcanic history of Dione

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...59..205m&link_type=abstract

(Natural Satellites Conference, Ithaca, NY, July 5-9, 1983) Icarus (ISSN 0019-1035), vol. 59, Aug. 1984, p. 205-220. Research su

Computer Science

26

Dione, Planetary Evolution, Satellite Surfaces, Tectonics, Volcanology, Chronology, Imagery, Landforms, Maps, Structural Properties (Geology), Terrain Analysis, Saturn, Satellites, Dione, Tectonism, Volcanism, History, Analysis, Observations, Formation, Crust, Bombardment, Impacts, Heating, Scarps, Radionuclides, Lineaments, Ammonia, Water, Melts, Cooling, Interior, Surface, Compression, Deposits, Plains, Thickness, Ridges, Faults, Features, Cratering, Terrain, Topography, Maps, Diagrams, Photographs

Scientific paper

The tectonic and volcanic modifications of Dione are described and interpreted. It is proposed that after the formation of a brittle outer shell, but before the end of heavy meteoritic bombardment, global expansion due to radionuclide heating (and perhaps a loss of oblateness due to tidal despinning and orbital recession) produced a global system of lineaments. An NH3 (H2O) melt was produced and 'erupted' on the surface to form plains units. Cooling of the interior (or a phase change) led to horizontal compression in the surface. Compression of a thick deposit of plains material, possibly overlying a decollement surface, is proposed to explain cratered-plains ridges developed as thrust or high-angle reverse faults. Following formation of ridges and smooth plains, the surface experienced light cratering.

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