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Elastic thickness and heat flux estimates on Ganymede

Nimmo, F. and Pappalardo, R.T. and Giese, B. (2002) Elastic thickness and heat flux estimates on Ganymede. Geophysical Research Letters, 29 (7), 62-1-62-4.

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We identify sites of apparentflexural uplift at rift zone boundaries on Ganymede using Galileo stereo-derived topography. The estimated effective elastic thickness Te is 0.2-0.6 km for a nominal Young's modulus of 1GPa. Using a viscoelastic model of the ice crust we find that the ratio of Te to conductive lid thickness is <0.5. The inferred local heat flux during deformation is less than 480mWm^-2, an probably close to60mWm^-2. This value is an order of magnitude greater that the present-day radiogenic heat flux. The stresses required to cause fault motions are around 1MPa. Both the high heat flux and the higher stresses are consistent with estimates of these quantities during an episode of transient tidal heating in Ganymede's past.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2002,
Title:Elastic thickness and heat flux estimates on Ganymede
AuthorsInstitution or Email of Authors
Nimmo, F.NASA Ames Research Centre, Moffett Field, CA
Pappalardo, R.T.University of Colorado Boulder, Laboratory for Atmospheric and Space Physics, Boulder, CO
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:62-1-62-4
Keywords:Satellites of Jupiter, Ganymede, heat flux
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institut für Weltraumsensorik und Planetenerkundung
Deposited By: Susanne Pieth
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 19:10

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