Other
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.4267s&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 22, p. 4267-4270
Other
30
Planetology: Solid Surface Planets: Interiors, Planetology: Solid Surface Planets: Tectonics, Planetology: Solid Surface Planets: Volcanism, Planetology: Solar System Objects: Venus
Scientific paper
We have conducted an extensive survey of the Magellan data to reassess the population of coronae. We identify a new type of coronae, here referred to as `Type 2 coronae', having the same basic morphology as previously identified coronae (Type 1), but lacking a significant (>50%) annulus of closely spaced fractures. 106 Type 2 coronae are included in the new database giving a total of 515 coronae on Venus. The characteristics of the expanded population of Type 1 coronae are similar to those of the previously described population, but the Type 2 coronae are smaller, tend to have relatively flat interiors surrounded by a topographic rim, and are more likely to be found isolated from other features. Our observations, in particular the morphology and setting of the Type 2 coronae, may provide supporting evidence for the existence of a depleted mantle layer under the venusian plains.
Grindrod Peter M.
Guest John E.
Smrekar Suzanne E.
Stofan Ellen R.
Tapper Simon W.
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