Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..827s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 9, p. 827-830.
Other
3
Carbon Dioxide Concentration, Carbonates, Erosion, Lava, Mars Atmosphere, Recycling, Land Surface Temperature, Mars Volcanoes, Thermal Decomposition, Mars, Carbonates, Volcanism, Thermal Effects, Erosion, Deposits, Water, Lava Flow, Turbulence, Atmosphere, Carbon Dioxide, Timescale, Depth, Cycles, Pressure, Abundance, Heating, Temperature, Density
Scientific paper
Thermal erosion of carbonate deposits by turbulently-flowing lava is investigated as a means of recycling carbon dioxide back into the atmosphere of Mars. Erosion rates of several meters/day are found, implying that up to hundreds of meters of carbonate could be removed over the lifetime of a flow. A large fraction of the northern plains and other parts of Mars were covered by lava during the Hesperian, and may have released the carbon dioxide trapped in carbonate deposits. This period of time, several times 10 exp 8 yrs, is comparable to that for the redeposition of such carbonate deposits. Therefore, there could have existed a relatively dense atmosphere, and enhanced weathering and erosion, after the Noachian era. This may help explain the apparent observational evidence for late fluvial and lacustrine activity on Mars.
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