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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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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.

Item URL in elib:https://elib.dlr.de/18265/
Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Elastic thickness and heat flux estimates on Ganymede
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nimmo, F.NASA-Ames Research Center, Moffet Field, CA, USAUNSPECIFIEDUNSPECIFIED
Pappalardo, R.T.Brown University, Providence, RI, USAUNSPECIFIEDUNSPECIFIED
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
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: Pieth, Susanne
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 19:00

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