The extinction process for Venusian domical shield volcanoes

Details The extinction process for Venusian domical shield volcanoes The extinction process for Venusian domical shield volcanoes

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..555h&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 555.

Computer Science

1

Venus Surface, Volcanoes, Extinction, Morphology, Planetary Mantles

Scientific paper

A regional study was conducted of Kunhild (19 N, 80 E) and Ereshkigal (21 N, 85 E), two large volcanoes that superficially resemble previously studied Sif Mons and Sappho Patera, respectively. However, the Kunhild-Ereshkigal region has a neglible geoid signature and may be a sight of extinct mantle upwelling. Kunhild, unlike Sif, has a late-forming depressed central region about 200 km across and 600 m deep. We have identified 29 large volcanoes that are Sif-like in superficial appearance. Twelve have a large central depression and appear to be isostatically compensated, while most without a depression have positive isostatic anomalies. We suggest that the death of a domical Venusian shield volcano often involves sagging of the center, perhaps due to removal of a central thermal anomaly at depth.

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