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relation of major volcanic center concentration on venus to global tectonic patternsGlobal analysis of Magellan image data indicates that a major concentration of volcanic centers covering about 40 percent of the surface of Venus occurs between the Beta, Atla, and Themis regions. Associated with this enhanced concentration are geological characteristics commonly interpreted as rifting and mantle upwelling. Interconnected low plains in an annulus around this concentration are characterized by crustal shortening and infrequent volcanic centers that may represent sites of mantle return flow and net downwelling. Together, these observations suggest the existence of relatively simple, large-scale patterns of mantle circulation similar to those associated with concentrations of intraplate volcanism on earth.
Document ID
19930070215
Document Type
Reprint (Version printed in journal)
Authors
Crumpler, L. S.
(NASA Headquarters Washington, DC United States)
Head, James W.
(NASA Headquarters Washington, DC United States)
Aubele, Jayne C.
(Brown Univ. Providence, RI, United States)
Date Acquired
August 16, 2013
Publication Date
July 30, 1993
Publication Information
Publication: Science
Volume: 261
Issue: 5121
ISSN: 0036-8075
Subject Category
LUNAR AND PLANETARY EXPLORATION
Distribution Limits
Public
Copyright
Other