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Estimation of the rate of volcanism on Venus from reaction rate measurementsLaboratory rate data for the reaction between SO2 and calcite to form anhydrite are presented. If this reaction rate represents the SO2 reaction rate on Venus, then all SO2 in the Venusian atmosphere will disappear in 1.9 Myr unless volcanism replenishes the lost SO2. The required volcanism rate, which depends on the sulfur content of the erupted material, is in the range 0.4-11 cu km of magma erupted per year. The Venus surface composition at the Venera 13, 14, and Vega 2 landing sites implies a volcanism rate of about 1 cu km/yr. This geochemically estimated rate can be used to determine if either (or neither) of two discordant geophysically estimated rates is correct. It also suggests that Venus may be less volcanically active than the earth.
Document ID
19890039166
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fegley, Bruce, Jr. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Prinn, Ronald G. (MIT Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
January 5, 1989
Publication Information
Publication: Nature
Volume: 337
ISSN: 0028-0836
Subject Category
LUNAR AND PLANETARY EXPLORATION
Distribution Limits
Public
Copyright
Other