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Enceladus: An estimate of heat flux and lithospheric thickness from flexurally supported topography.

Giese, Bernd and Wagner, Roland and Hussmann, Hauke and Neukum, Gerhard and Helfenstein, Paul and Thomas, Peter (2008) Enceladus: An estimate of heat flux and lithospheric thickness from flexurally supported topography. In: Bulletin of the American Astronomical Society, 40 (3), p. 398. 40. Annual Meeting of the AAS Division for Planetary Sciences, 2008-10-11 - 2008-10-15, Ithaca, NY (USA).

Full text not available from this repository.

Abstract

We have identified flexural uplift along a rift zone of the Harran Sulci, Enceladus, using Cassini stereo-derived topography. Modeling the topography on the basis of a flexed broken elastic plate yields an effective lithospheric thickness of 0.3 km and, combined with the strength envelope, a mechanical lithospheric thickness of 2.5 km with heat fluxes of 150-220 mW/m2 at the time of formation. The heat fluxes are comparable with average heat fluxes measured in Enceladus’ active south polar area and correspond to heat fluxes derived via models of unstable extension of the lithosphere in this area. Surface porosity can reduce the heat fluxes to an estimated minimum of 40-50 mW/m2. Crater-size frequency counts and a lunar-like impact chronology fix the time of formation of the rift zone at 3.5 Ga from present-day.

Item URL in elib:https://elib.dlr.de/56552/
Document Type:Conference or Workshop Item (Speech)
Title:Enceladus: An estimate of heat flux and lithospheric thickness from flexurally supported topography.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Giese, BerndUNSPECIFIEDUNSPECIFIED
Wagner, RolandUNSPECIFIEDUNSPECIFIED
Hussmann, HaukeUNSPECIFIEDUNSPECIFIED
Neukum, GerhardFreie Universität BerlinUNSPECIFIED
Helfenstein, PaulCornell University, Ithaca, NY, USAUNSPECIFIED
Thomas, PeterCornell University, Ithaca, NY, USAUNSPECIFIED
Date:2008
Journal or Publication Title:Bulletin of the American Astronomical Society
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:40
Page Range:p. 398
Series Name:AAS
Status:Published
Keywords:Enceladus, Saturn satellites, Heat flow, Lithosphere
Event Title:40. Annual Meeting of the AAS Division for Planetary Sciences
Event Location:Ithaca, NY (USA)
Event Type:international Conference
Event Dates:2008-10-11 - 2008-10-15
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):W - Vorhaben Vergleichende Planetologie (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Giese, Dr.rer.nat. Bernd
Deposited On:15 Dec 2008
Last Modified:27 Apr 2009 15:34

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