Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgre..11506004g&link_type=abstract
Journal of Geophysical Research, Volume 115, Issue E6, CiteID E06004
Physics
1
Planetary Sciences: Solar System Objects: Venus, Planetary Sciences: Solid Surface Planets: Volcanism (6063, 8148, 8450), Volcanology: Planetary Volcanism (5480, 6063, 8148), Volcanology: Eruption Mechanisms And Flow Emplacement, Volcanology: Remote Sensing Of Volcanoes
Scientific paper
The morphology and topography of 23 Venusian steep-sided domes are analyzed to examine possible emplacement mechanisms. Stereo radargrammetric techniques are used with Magellan synthetic aperture radar image data (˜100 m resolution) to generate digital elevation models for the domes (˜1 km horizontal resolution). Heights of the domes range from 390 to 1590 m, aspect ratios (height/diameter) range from 0.01 to 0.07, and volumes range from 73 to 1790 km3. Dome morphology varies along a continuous trend that is directly related to the aspect ratio. Domes with a low aspect ratio tend to be sunken in their centers, whereas domes with higher aspect ratios have flat to convex surfaces. Domes with the highest aspect ratios have central peaks. These trends are likely due to slight variations in the thickness of the crust and, possibly, effusion rates. Episodic emplacement is also inferred to be a significant process for the formation and growth of some of the domes in this sample.
Byrnes Jeffrey M.
Gleason Abigail L.
Herrick Robert R.
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