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The global distribution of giant radiating dike swarms on Venus: Implications for the global stress stateMagellan radar data of Venus reveal 163 large radial lineament systems composed of graben, fissure, and fracture elements. On the basis of their structure, plan view geometry, and volcanic associations, at least 72% are interpreted to have formed primarily through subsurface dike swarm emplacement, the remainder through uplift or a combination of these two mechanisms. The population of swarms is used to determine regional and global stress orientation. The stress configuration recorded from 330-210 deg E (Aphrodite Terra) is best explained by isostatic compensation of existing long wavelength topography or coupling between mantle flow and the lithosphere. The rest are correlated with concentrations of rifting and volcanism in the Beta-Atla-Themis region. The global stress field on Venus is different than that of Earth, where plate boundary forces dominate.
Document ID
19950034083
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Grosfils, Eric B. (Brown Univ. Providence, RI, United States)
Head, James W. (Brown Univ. Providence, RI, United States)
Date Acquired
August 16, 2013
Publication Date
April 15, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 8
ISSN: 0094-8276
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NAGW-1873
Distribution Limits
Public
Copyright
Other