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Furrow Topography and the Elastic Thickness of Ganymede's Dark Terrain LithosphereThe effective elastic thickness of Ganymede's lithosphere tell of the satellite's thermal evolution through time. Generally it has been inferred that dark terrain, which is less tectonically deformed than grooved terrain, represents regions of cooler and thicker lithosphere [1]. The ancient dark terrain is cut by furrows, tectonic troughs about 5 to 20 km in width, which may have formed in response to large ancient impacts [1, 2]. We have applied the methods of [3] to estimate effective elastic thickness based on topographic profiles across tectonic furrows, extracted from a stereo-derived digital elevation model (DEM) of dark terrain in Galileo Regio [4]. Asymmetry in furrow topography and inferred flexure suggests asymmetric furrow fault geometry. We find effective elastic thicknesses ~0.4 km, similar to analyzed areas alongside bright grooved terrain. Data and Analysis: A broken-plate elastic model.
Document ID
Acquisition Source
Document Type
Conference Paper
Pappalardo, Robert T.
(Colorado Univ. Boulder, CO, United States)
Nimmo, Francis
(University Coll. London, United Kingdom)
Giese, Bernd
(Deutsche Forschungsanstalt fuer Luft- und Raumfahrt Berlin, Germany)
Bader, Christina E.
(Michigan Technological Univ. Houghton, MI, United States)
DeRemer, Lindsay C.
(Colorado Univ. Boulder, CO, United States)
Prockter, Louise M.
(Johns Hopkins Univ. Laurel, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar And Planetary Science And Exploration
Funding Number(s)
Distribution Limits
Public Use Permitted.
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