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Styles of deformation in Ishtar Terra and their implicationsStyles of deformation in Ishtar Terra are examined on the basis of imaging by the Magellan radar between the start of the mission and the start of the first superior conjunction hiatus. Ishtar Terra appears to have characteristics of both plume uplifts and convergent belts, and exhibits a great variety of tectonic and volcanic activity, with large variations within distances of only a few hundred kilometers. The most prominent terrain types are the volcanic plains of Lakshmi and the mountain belts of Maxwell, Freyja, and Danu. Ishtar demonstrates three general properties of Venus. Erosional degradation is absent, leading to the preservation of patterns resulting from past activity. Many surface features are the responses of a competent layer less than 10 km thick to flows of 100 km or broader scale. These broader scale flows are controlled mainly by heterogeneities in the mantle.
Document ID
19930030863
Document Type
Reprint (Version printed in journal)
Authors
Kaula, William M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bindschadler, Duane L.
(California Univ. Los Angeles, United States)
Grimm, Robert E.
(Southern Methodist Univ. Dallas, TX; Arizona State Univ., Tempe, United States)
Hansen, Vicki L.
(Southern Methodist Univ. Dallas, TX, United States)
Roberts, Kari M.
(Brown Univ. Providence, RI, United States)
Smrekar, Suzanne E.
(MIT Cambridge, MA, United States)
Date Acquired
August 16, 2013
Publication Date
October 25, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: E10
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
93A14860
Funding Number(s)
CONTRACT_GRANT: JPL-957070
CONTRACT_GRANT: JPL-975072
CONTRACT_GRANT: JPL-958497
CONTRACT_GRANT: JPL-957088
Distribution Limits
Public
Copyright
Other

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