New Insights into Corona Evolution on Venus: Implications for Models of Origin

Details New Insights into Corona Evolution on Venus: Implications for Models of Origin New Insights into Corona Evolution on Venus: Implications for Models of Origin

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1279s&link_type=abstract

Lunar and Planetary Science, volume 27, page 1279

Computer Science

Coronae, Venus, Volcanism

Scientific paper

Stofan and Head proposed a sequence of events for corona evolution based on Venera 15/16 data that was generally supported by initial analysis of Magellan data. Coronae are thought to go through an initial sequence of uplift and volcanic construction, accompanied by interior faulting, fracturing and volcanism. Squyres et al. modified this first stage, identifying a number of features having extensive radial faulting that they interpreted to be coronae in the early stages of formation. This stage had been predicted by modeling but not seen in Venera 15/16 data. This is followed by a second stage of fracture annulus and topographic trough formation and reduction of topography. In the final stage of evolution, coronae have continued volcanism and reduction of topographic relief. The relative timing of annulus and trough formation is not apparent. The three-stage process of corona formation described above has been modeled as a rising mantle diapir which raises the overlying lithosphere into a dome-shaped uplift. The diapir then flattens as it impinges against the mechanical lithosphere, with the surface topography then evolving to a more plateau-like shape with concentric fractures forming on the rim of the plateau. Finally the diapir cools and loses buoyancy, with the raised topography relaxing under the force of gravity resulting in additional concentric fractures. Recent studies of corona topography indicate that current models do not predict topographic variations seen at coronae. Work is in progress on a comprehensive model that predicts nearly all of the observed topographic morphologies. In addition, more detailed mapping and analysis of Magellan data has allowed refinement of this sequence of events, that will help to constrain modeling of corona formation.

Affiliated with

Also associated with

No associations

Rating

New Insights into Corona Evolution on Venus: Implications for Models of Origin does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New Insights into Corona Evolution on Venus: Implications for Models of Origin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Insights into Corona Evolution on Venus: Implications for Models of Origin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1614887