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Record Details

Record 24 of 659
Venus pancake dome formation: Morphologic effects of a cooling-induced variable viscosity during emplacement
Author and Affiliation:
Sakimoto, S. E. H.(Johns Hopkins Univ., Baltimore, MD, United States)
Zuber, M. T.(Johns Hopkins Univ., Baltimore, MD, United States)
Abstract: The distinctive steep-sided 'pancake' domes discovered in the Magellan images of Venus have morphologies that suggest formation by a single continuous emplacement of a high viscosity magma. A resemblance of the venusian domes to much smaller terrestrial rhyolite and dacite volcanic domes has prompted some authors to suggest that the domes on Venus also have high silica compositions and thus, high viscosities. However, viscosity is a function of crystallinity as well as silica content in a magma, and thus increases as a result of magmatic cooling. To investigate the effect of a cooling-induced viscosity increase on dome morphology, we have modeled the domes as radial viscous gravity currents that cool during emplacement. Various aspects of the investigation are discussed.
Publication Date: Jan 01, 1993
Document ID:
19940016259
(Acquired Dec 28, 1995)
Accession Number: 94N20732
Subject Category: LUNAR AND PLANETARY EXPLORATION
Coverage: Abstract Only
Document Type: Conference Paper
Publication Information: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z; p 1233-1234
Financial Sponsor: NASA; United States
Organization Source: Johns Hopkins Univ.; Dept. of Earth and Planetary Sciences.; Baltimore, MD, United States
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: CONES (VOLCANOES); COOLING; GEOMORPHOLOGY; MAGMA; MATHEMATICAL MODELS; PLANETARY GEOLOGY; RHYOLITE; VENUS (PLANET); VENUS SURFACE; VISCOSITY; VOLCANOLOGY; CRYSTALLINITY; SILICON DIOXIDE; TEMPERATURE EFFECTS
Imprint And Other Notes: In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1233-1234 (SEE N94-20636 05-91)
Availability Source: Other Sources
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