NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Insights into Corona Formation Through Statistical AnalysesStatistical analysis of an expanded database of coronae on Venus indicates that the populations of Type 1 (with fracture annuli) and 2 (without fracture annuli) corona diameters are statistically indistinguishable, and therefore we have no basis for assuming different formation mechanisms. Analysis of the topography and diameters of coronae shows that coronae that are depressions, rimmed depressions, and domes tend to be significantly smaller than those that are plateaus, rimmed plateaus, or domes with surrounding rims. This is consistent with the model of Smrekar and Stofan and inconsistent with predictions of the spreading drop model of Koch and Munga. The diameter range for domes, the initial stage of corona formation, provides a broad constraint on the buoyancy of corona-forming plumes. Coronae are only slightly more likely to be topographically raised than depressions, with Type 1 coronae most frequently occurring as rimmed depressions and Type 2 coronae most frequently occurring with flat interiors and raised rims. Most Type 1 coronae are located along chasmata systems or fracture belts, while Type 2 coronae are found predominantly as isolated features in the plains. Coronae at hot spot rises tend to be significantly lager than coronae in other settings, consistent with a hotter upper mantle at hot spot rises and their active state.
Document ID
20030011791
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Glaze, L. S.
(Proxemy Research, Inc. Laytonsville, MD United States)
Stofan, E. R.
(Proxemy Research, Inc. Laytonsville, MD United States)
Smrekar, S. E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Baloga, S. M.
(Proxemy Research, Inc. Laytonsville, MD United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Publication Information
Publication: Journal of Geophysical Research
Publisher: American Geophysical Union
Volume: 107
Issue: E12
ISSN: 0148-0227
Subject Category
Solar Physics
Funding Number(s)
PROJECT: RTOP 344-30-43-03
CONTRACT_GRANT: NAG5-10530
CONTRACT_GRANT: NASW-00013
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available