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Topographic features of Ithaca Chasma, Tethys

Giese, B. and Wagner, R. and Neukum, G. and Helfenstein, P. and Porco, C. C. (2006) Topographic features of Ithaca Chasma, Tethys. In: Lunar and Planetary Science XXXVII, abstract#1749. Lunar and Planetary Institute, Houston, TX. 37th Lunar and Planetary Sciece Conference, 2006-03-13 - 2006-03-17, League City, Texas, USA. ISSN 1540-9120

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Abstract

Ithaca Chasma is the most prominent tectonic feature on Tethys (R~530 km). It was first seen in Voyager I images as an enormous valley about 1000 km long and 50 to 100 km wide. The origin of this rift valley is not clear yet. Smith et al. (1981) suggested that Ithaca Chasma was formed by freeze-expansion of Tethys' interior but other models relate Ithaca Chasma to the formation of the 400 km Odysseus impact basin. Photoclinometry was applied to infer the topography of Ithaca Chasma. An average depth of ~3km was obtained and a raised rim of ~ 0.5 km above its surroundings was found. However, low image resolutions (Voyager I: 15 km/lp at best, Voyager II: 5 km/lp at best) have prevented in-depth morphologic studies. In this paper we report on the topography of Ithaca Chasma derived from high resolution Cassini-stereo images.

Document Type:Conference or Workshop Item (Poster)
Title:Topographic features of Ithaca Chasma, Tethys
Authors:
AuthorsInstitution or Email of Authors
Giese, B.UNSPECIFIED
Wagner, R.UNSPECIFIED
Neukum, G.Institut für Geologische Wissenschaften, Freie Universität, Berlin
Helfenstein, P.Department of Astronomy, Cornell University, Ithaca, NY, USA
Porco, C. C.Cassini Imaging Central Laboratory for Operations, Boulder, CO, USA
Date:2006
Journal or Publication Title:Lunar and Planetary Science XXXVII
Refereed publication:Yes
In ISI Web of Science:No
Page Range:abstract#1749
Publisher:Lunar and Planetary Institute, Houston, TX
Series Name:LPI Contribution
ISSN:1540-9120
Status:Published
Keywords:Tethys, Cassini, Ithaca Chasma, Topography, rift flank uplift, tectonics
Event Title:37th Lunar and Planetary Sciece Conference
Event Location:League City, Texas, USA
Event Type:international Conference
Event Dates:2006-03-13 - 2006-03-17
Organizer:Lunar and Planetary Institute, Houston, Texas
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), W - Vorhaben CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Deposited By: Dr.rer.nat. Bernd Giese
Deposited On:29 Mar 2006
Last Modified:12 Dec 2013 20:09

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