Recent volcanic activity on Venus - Evidence from radiothermal emissivity measurements

Details Recent volcanic activity on Venus - Evidence from radiothermal emissivity measurements Recent volcanic activity on Venus - Evidence from radiothermal emissivity measurements

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..102...26r&link_type=abstract

Icarus (ISSN 0019-1035), vol. 102, no. 1, p. 26-39.

Mathematics

Logic

17

Emissivity, Magellan Spacecraft (Nasa), Planetary Geology, Pyrites, Thermal Emission, Venus Surface, Volcanology, High Altitude, Low Altitude, Mineralogy, Plains, Radar Imagery, Satellite Altimetry, Synthetic Aperture Radar, Venus, Volcanism, Emissivity, Highlands, Surface, Domes, Flow, Plains, Weathering, Mineralogy, Procedure, Volcanoes, Altitude, Radar Methods, Magellan Mission, Spacecraft Observations, Sar Instrument, Tepev Mons, Sapas Mons, Maat Mons, Ozza Mons, Rhea Mons, Theia Mons, Sif Mons, Gula Mo

Scientific paper

Radiothermal emissivity measurements are analyzed in order to study large volcanic constructs on Venus and to correlate details of the reflectivity/emissivity patterns with geological landforms and stratigraphy visible in corresponding SAR images. There appears to be a correlation between locations on Venus where high emissivity at high altitudes and low emissivity at low altitudes are observed. These phenomena are attributed here to relatively recent volcanic activity: the former to summit eruptions that have not had time to weather to the low-emissivity state, the latter to continuing emission of volcanic gases from neighboring small plains volcanoes. The pattern of reflectivity and emissivity on Maat Mons is examined in the light of these findings. It is concluded that Maat Mons has undergone the most recent episode of volcanic activity of all the volcanoes studied here.

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