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Elastic Thickness and Heat Flux Estimates on Ganymede

Pappalardo, R. T. and Nimmo, F. and Giese, B. (2001) Elastic Thickness and Heat Flux Estimates on Ganymede. DPS, New Orleans, 27.11-1.12.01.

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Abstract

We identify sites of apparent flexural uplift associated with grooved terrain formation and rifting on Ganymede using Galileo stereo-derived topography from the G28 orbit. The estimated effective elastic thickness Te is found to be 0.2-0.6 km for a nominal Young's modulus of 1 GPa. Using a viscoelastic model of the ice lithosphere we find that the ratio of Te to conductive lid thickness is < 480 mW m-2, and probably close to 60 mW m-2. This value is an order of magnitude greater that the present-day radiogenic heat flux. Based on fault block topography, the stresses required to cause fault motion are consistent with estimates of these quantities during an episode of transient tidal heating in Ganymede's past.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Elastic Thickness and Heat Flux Estimates on Ganymede
Authors:
AuthorsInstitution or Email of Authors
Pappalardo, R. T.LASP, U. Colorado, USA
Nimmo, F.NASA-Ames Research Center, Moffet Field, CA, USA
Giese, B.UNSPECIFIED
Date:2001
Status:Published
Keywords:Jupitermond, Ganymed, Geophysik
Event Title:DPS, New Orleans, 27.11-1.12.01
Organizer:American Astronomical Society
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 19:00

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