Mathematics – Logic
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sosyr..36..214k&link_type=abstract
Solar System Research, v. 36, Issue 3, p. 214-233 (2002).
Mathematics
Logic
Scientific paper
This paper deals with some aspects of the formation and development of coronae, specific large circular structures on Venus. The origin of coronae is commonly associated with the effect of rising and subsequently relaxing hot mantle plumes (diapirs) on the surface layers of the lithosphere. A detailed photogeologic study of one of such structures, Nefertiti corona, which is undertaken in this paper, is based on an analysis of Magellan radar images. A sequence of geologic formations revealed in the territory under investigation made it possible, in combination with an analysis of tectonic structures, to develop a step-by-step scenario of the evolution of this structure. It was established that Nefertiti has gone the entire cycle of corona evolution-from the formation of a radially fractured rising dome (``nova'') to the mature corona. At the final stage of evolution of this corona, traces of its rejuvenation and the origin of a new system of radial fracturing in the central part of the corona are observed. Our observations of Nefertiti corona are compared to theoretical (numerically solved) and tectonophysical models of corona formation, which were described by some other researchers. The inferred evolution of Nefertiti agrees with commonly accepted geologic models of corona evolution.
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