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Lithospheric stresses due to radiogenic heating of an ice-silicate planetary body - Implications for Ganymede's tectonic evolutionThermal evolution models of differentiated and undifferentiated ice-silicate bodies containing long-lived radiogenic heat sources are examined. Lithospheric sresses arise due to volume change of the interior and temperature change in the lithosphere. For an undifferentiated body, the surface stress peaks early in the evolution, while in the differentiated case, stresses peak later and continue to accumulate for longer periods of time. The variation of near-surface stress with depth shows that stresses for the undifferentiated body initially penetrate to great depths, but rapidly concentrate within a few kilometers of the surface. For the differentiated body, elastic stresses never accumulate at a depth greater than a few kilometers. These models are applied to consider long-term rdioactive heating as a possible mechanism of tectonic activity and bright terrain formation on Ganymede.
Document ID
Document Type
Reprint (Version printed in journal)
Zuber, M. T.
(Brown Univ. Providence, RI, United States)
Parmentier, E. M.
(Brown University Providence, RI, United States)
Date Acquired
August 12, 2013
Publication Date
February 15, 1984
Publication Information
Publication: Journal of Geophysical Research, Supplement
Volume: 89
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Funding Number(s)
Distribution Limits
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