Lopes, RMC and Mitchell, KL and Stofan, ER and Lunine, JI and Lorenz, R and Paganelli, F and Kirk, RL and Wood, CA and Wall, SD and Robshaw, LE and Fortes, AD and Neish, CD and Radebaugh, J and Reffet, E and Ostro, SJ and Elachi, C and Allison, MD and Anderson, Y and Boehmer, R and Boubin, G and Callahan, P and Encrenaz, P and Flamini, E and Francescetti, G and Gim, Y and Hamilton, G and Hensley, S and Janssen, MA and Johnson, WTK and Kelleher, K and Muhleman, DO and Ori, G and Orosei, R and Picardi, G and Posa, F and Roth, LE and Seu, R and Shaffer, S and Soderblom, LA and Stiles, B and Vetrella, S and West, RD and Wye, L and Zebker, HA (2007) Cryovolcanic features on Titan's surface as revealed by the Cassini Titan Radar Mapper. ICARUS , 186 (2) 395 - 412. 10.1016/j.icarus.2006.09.006.
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The Cassini Titan Radar Mapper obtained Synthetic Aperture Radar images of Titan's surface during four fly-bys during the mission's first year. These images show that Titan's surface is very complex geologically, showing evidence of major planetary geologic processes, including cryovolcanism. This paper discusses the variety of cryovolcanic features identified from SAR images, their possible origin, and their geologic context. The features which we identify as cryovolcanic in origin include a large (180 km diameter) volcanic construct (dome or shield), several extensive flows, and three calderas which appear to be the source of flows. The composition of the cryomagma on Titan is still unknown, but constraints on rheological properties can be estimated using flow thickness. Rheological properties of one flow were estimated and appear inconsistent with ammonia-water slurries, and possibly more consistent with ammonia-water-methanol slurries. The extent of cryovolcanism on Titan is still not known, as only a small fraction of the surface has been imaged at sufficient resolution. Energetic considerations suggest that cryovolcanism may have been a dominant process in the resurfacing of Titan. (c) 2006 Elsevier Inc. All rights reserved.
|Title:||Cryovolcanic features on Titan's surface as revealed by the Cassini Titan Radar Mapper|
|Keywords:||titan, volcanism, satellites of Saturn, STEEP-SIDED DOMES, PLANETOLOGICAL APPLICATIONS, INTERNAL STRUCTURE, HUYGENS PROBE, LAVA FLOWS, EMPLACEMENT, VENUS, EUROPA, LIQUID, ATMOSPHERE|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences|
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