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An exceptionally high standing ridge on Enceladus

Giese, Bernd and Helfenstein, P. and Hauber, Ernst and Hussmann, H. and Wagner, Roland (2017) An exceptionally high standing ridge on Enceladus. In: EPSC Abstracts, Vol 11, EPSC2017-28. EPSC 2017, 17.-22. Sep. 2017, Riga, Latvija.

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Official URL: http://meetingorganizer.copernicus.org/EPSC2017/poster_programme/26060

Abstract

Cassini stereo-derived topography reveals an exceptionally high-standing sawtooth-shaped ridge in Enceladus’ Samarkand Sulcus. Over a length of 100 km and of a width of 10 km, it reaches elevations of up to 1750 m, which makes it the highest ridge observed on Enceladus so far. Flank slopes reach 40°. The morphology of the ridge suggests that it formed first by rift flank-uplift caused by extension, but sinistral shear and compression later modified the shape. This modification has in particular emplaced small-scale fragments sticking out of the surface and creating a (previously enigmatic) pattern of black spots on the sun facing side of the ridge. Modelling of uplift related lithospheric flexure yields an effective elastic thickness (Te) of 0.36 km (E=1 GPa) at the time of formation, similar to results obtained in Harran Sulcus [1]. Considering the ridge as a load on the lithosphere at present-day, we obtain a lower limit on Te of 1.5 km. Within an asteroid/comet based impact chronology the ridge is 3.6/0.7 Gy old.

Item URL in elib:https://elib.dlr.de/113023/
Document Type:Conference or Workshop Item (Poster)
Title:An exceptionally high standing ridge on Enceladus
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Giese, BerndBernd.Giese (at) dlr.dehttps://orcid.org/0000-0002-4110-4215
Helfenstein, P.Cornell Center for Astrophysics and Planetary Science, Ithaca, NYUNSPECIFIED
Hauber, ErnstErnst.Hauber (at) dlr.dehttps://orcid.org/0000-0002-1375-304X
Hussmann, H.hauke.hussmann (at) dlr.deUNSPECIFIED
Wagner, Rolandroland.wagner (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:EPSC Abstracts, Vol 11, EPSC2017-28
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Enceladus, topography, ridges, icy satellites, Saturn satellites
Event Title:EPSC 2017
Event Location:Riga, Latvija
Event Type:international Conference
Event Dates:17.-22. Sep. 2017
Organizer:Europlanet
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Geology
Deposited By: Giese, Dr.rer.nat. Bernd
Deposited On:20 Sep 2017 11:16
Last Modified:31 Jul 2019 20:10

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