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Estimation of the rate of volcanism on Venus from reaction rate measurements (1989)

Prinn, Ronald G. ; Fegley, Bruce, Jr.

In: Other Sources

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Publication Date: 2011-08-19

Description: Laboratory 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.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: Nature (ISSN 0028-0836); 337; 55-58

Format: text

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