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Elastic thickness and heat flux estimates on Ganymede

Nimmo, F. and Pappalardo, R.T. and Giese, B. (2001) Elastic thickness and heat flux estimates on Ganymede. AGU, San Francisco, CA, 10-14 December 2001.

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Abstract

We identify sites of apparent flexural uplift at rift zone boundaries on Ganymede using Galileo stere-derived topography. The estimated effective elastic thichness Te is 0.2-0.6 km for a nominal Young's modulus of 1 GPa. 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 and probably close to 60mWm_-2. This value is an order of magnitude greater that the present-day radiogenic heat flux. The stresses required to cause fault motion 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: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
Nimmo, F.NASA-Ames Research Center, Moffet Field, CA, USA
Pappalardo, R.T.Brown University, Providence, RI, USA
Giese, B.UNSPECIFIED
Date:2001
Status:Published
Keywords:Satellites of Jupiter, Ganymede, heat flux
Event Title:AGU, San Francisco, CA, 10-14 December 2001
Organizer:American Geophyiscal Union
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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