Crustal Analysis of Coronae and Impact Craters on Venus Using Spectrally Correlated Free-air and Terrain Gravity Data from Magellan Observations.

Details Crustal Analysis of Coronae and Impact Craters on Venus Using Spectrally Correlated Free-air and Terrain Gravity Data from Magellan Observations. Crustal Analysis of Coronae and Impact Craters on Venus Using Spectrally Correlated Free-air and Terrain Gravity Data from Magellan Observations.

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusm.p21a..09p&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #P21A-09

Other

5475 Tectonics (8149), 8450 Planetary Volcanism (5480), 0920 Gravity Methods, 1219 Local Gravity Anomalies And Crustal Structure, 1729 Planetology

Scientific paper

Coronae on Venus are generally upraised concentric topographic features with evidence of interior fracturing and volcanism. They are suggested to have formed over sites of mantle upwelling that were subsequently modified by viscous relaxation. Lithospheric mass anomalies beneath impact basins and craters also demonstrate mantle uplift, but their surface morphologies may help differentiate the roles of spatially random and equilibrium resurfacing models in the tectonic evolution of Venus. We examine these propositions using the Magellan free-air anomalies and radar altimetry inferred topography. From the spectral correlation of free-air and terrain gravity effects at satellite altitudes, we investigate contrasting models for the evolution of the annuli of coronae including crustal subduction, extension, and other tectonic sources of uncompensated lithospheric mass. We also consider the resurfacing theories for Venus from the inferred attributes of the impact basin.

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