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Analysis of a cryolava flow-like feature on Titan

Le Corre, L. and Le Mouélic, S. and Sotin, C. and Combe, J.-P. and Rodriguez, S. and Barnes, J.W. and Brown, R.H. and Buratti, B.J. and Jaumann, R. and Soderblom, J. and Soderblom, L.A. and Clark, R. and Baines, K.H. and Nicholson, P.D. (2009) Analysis of a cryolava flow-like feature on Titan. Planetary and Space Science, 57 (7), pp. 870-879. Elsevier. DOI: 10.1016/j.pss.2009.03.005

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Abstract

This paper reports on the analysis of the highest spatial resolution hyperspectral images acquired by the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft during its prime mission. A bright area matches a flow-like feature coming out of a caldera-like feature observed in Synthetic Aperture Radar (SAR) data recorded by the Cassini radar experiment [Lopes et al., 2007. Cryovolcanic features on Titan's surface as revealed by the Cassini Titan Radar Mapper. Icarus 186, 395–412, doi:10.1016/j.icarus.2006.09.006]. In this SAR image, the flow extends about 160 km east of the caldera. The contrast in brightness between the flow and the surroundings progressively vanishes, suggesting alteration or evolution of the composition of the cryolava during the lifetime of the eruptions. Dunes seem to cover part of this flow on its eastern end. We analyze the different terrains using the Spectral Mixing Analysis (SMA) approach of the Multiple-Endmember Linear Unmixing Model (MELSUM, Combe et al., 2008). The study area can be fully modeled by using only two types of terrains. Then, the VIMS spectra are compared with laboratory spectra of known materials in the relevant atmospheric windows (from 1 to 2.78 μm). We considered simple molecules that could be produced during cryovolcanic events, including H2O, CO2 (using two different grain sizes), CH4 and NH3. We find that the mean spectrum of the cryoflow-like feature is not consistent with pure water ice. It can be best fitted by linear combinations of spectra of the candidate materials, showing that its composition is compatible with a mixture of H2O, CH4 and CO2.

Item URL in elib:https://elib.dlr.de/61561/
Document Type:Article
Title:Analysis of a cryolava flow-like feature on Titan
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Le Corre, L.CNRS, Université de Nantes, Laboratoire de Planétologie et Géodynamique, UMR 6112, 2 rue de la Houssinière, Nantes F-44000, FranceUNSPECIFIED
Le Mouélic, S.CNRS, Université de Nantes, Laboratoire de Planétologie et Géodynamique, UMR 6112, 2 rue de la Houssinière, Nantes F-44000, FranceUNSPECIFIED
Sotin, C.Jet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Combe, J.-P.Bear Fight Center, A Columbus Technologies and Services Inc. Affiliate, P.O. Box 667, 22 Fiddler's Road, Winthrop, WA 98862, USAUNSPECIFIED
Rodriguez, S.Laboratoire AIM, CEA Orme des Merisiers, DSM/IRFU/SAp, FranceUNSPECIFIED
Barnes, J.W.Department of Physics, University of Idaho Engineering-Physics Building, Moscow, ID 83844, USAUNSPECIFIED
Brown, R.H.Department of Planetary Sciences, University of Arizona, Lunar and Planetary Laboratory, 1629 E. University Blvd., Tucson, AZ 85721-0092, USA UNSPECIFIED
Buratti, B.J.Jet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Jaumann, R.UNSPECIFIEDUNSPECIFIED
Soderblom, J.Department of Planetary Sciences, University of Arizona, Lunar and Planetary Laboratory, 1629 E. University Blvd., Tucson, AZ 85721-0092, USA UNSPECIFIED
Soderblom, L.A.United States Geological Survey, 2255 N. Gemini Drive, Flagstaff, AZ 86001, USAUNSPECIFIED
Clark, R.United States Geological Survey, Mail Stop 964, Box 25046, Denver Federal Center, Denver, CO 80225, USAUNSPECIFIED
Baines, K.H.Jet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Nicholson, P.D.Department of Astronomy, Cornell University, 418 Space Sciences Building, Ithaca, NY 14853, USAUNSPECIFIED
Date:2009
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:57
DOI :10.1016/j.pss.2009.03.005
Page Range:pp. 870-879
Publisher:Elsevier
Status:Published
Keywords:Infrared observations; Radar observations; Infrared spectroscopy; Titan
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 CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Pieth, Susanne
Deposited On:09 Dec 2009 11:37
Last Modified:20 Mar 2013 19:42

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