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Venus - Chemical weathering of igneous rocks and buffering of atmospheric compositionData from the Pioneer Venus radar mapper, combined with measurements of wind velocity and atmospheric composition, suggest that surface erosion on Venus varies with altitude. Calcium- and magnesium-rich weathering products are produced at high altitudes by gas-solid reactions with igneous minerals, then removed into the hotter lowlands by surface winds. These fine-grained weathering products may then rereact with the lower atmosphere and buffer the composition of the observed gases carbon dioxide, water vapor, sulfur dioxide, and hydrogen fluoride in some regions of the surface. This process is a plausible mechanism for the establishment in the lowlands of a calcium-rich mineral assemblage, which had previously been found necessary for the buffering of these species.
Document ID
19820044713
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Nozette, S.
(MIT Cambridge, MA, United States)
Lewis, J. S.
(Arizona, University Tucson, AZ, United States)
Date Acquired
August 10, 2013
Publication Date
April 9, 1982
Publication Information
Publication: Science
Volume: 216
Subject Category
Lunar And Planetary Exploration
Accession Number
82A28248
Distribution Limits
Public
Copyright
Other

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