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Mineralogy of the Urvara–Yalode region on Ceres

Longobardo, A and Galiano, Anna and Ammannito, E. and Carrozzo, F. G. and DeSanctis, M.C. and Palomba, E. and Zambon, F. and Frigeri, A. and Ciarniello, M. and Raponi, A and Tosi, F. and Capria, M. T. and Stephan, Katrin and Raymond, Carol A. and Russell, Christopher T. (2019) Mineralogy of the Urvara–Yalode region on Ceres. Icarus: International Journal of Solar System Studies, 318, pp. 241-250. Elsevier. DOI: 10.1016/j.icarus.2017.12.011 ISSN 0019-1035

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103517307431

Abstract

We studied the distribution in the Urvara–Yalode region of Ceres (latitudes 21–66°S, longitudes 180–360°E) of main spectral parameters derived from the VIR imaging spectrometer onboard the NASA/Dawn spacecraft, as an overall study of Ceres mineralogy reported in this special issue. In particular, we analyzed the distribution of reflectance at 1.2 µm, band depth at 2.7 and 3.1 µm, ascribed to magnesium and ammoniated phyllosilicates, respectively. Whereas the average band depths of this region are lower than eastern longitudes, reflecting the E-W dichotomy of abundance of phyllosilicates on Ceres, spectral variations inside this region are observed in the following units: (a) the central peak of the Urvara crater (45.9°S, 249.2°E, 170 km in diameter), showing a deep 3.1 µm band depth, indicating an ammonium enrichment; (b) the cratered terrain westwards of the Yalode basin (42.3°S, 293.6°E, 260 km in diameter), where absorption bands are deeper, probably due to absence of phyllosilicates depletion following the Yalode impact; (c) the hummocky cratered floor of Yalode and Besua (42.4°S, 300.2°E) craters, characterized by lower albedo and band depths, probably due to different roughness; (d) Consus (21°S 200°E) and Tawals (39.1°S, 238°E) craters, whose albedo and band depths decreasing could be associated to different grain size or abundance of dark materials. Twenty-two small scale (i.e., lower than 400 m) bright spots are observed: because their composition is similar to the Ceres average, a strong mixing may have occurred since their formation.

Item URL in elib:https://elib.dlr.de/131907/
Document Type:Article
Title:Mineralogy of the Urvara–Yalode region on Ceres
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Longobardo, AINAF-LAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Galiano, Annaiaps - istituto di astrofisica e planetologia spaziali, inaf - istituto nazionale di astrofisica, rome, italyUNSPECIFIED
Ammannito, E.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Carrozzo, F. G.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
DeSanctis, M.C.INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Palomba, E.Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica,via del Fosso del Cavaliere, 00133 Roma, ItalyUNSPECIFIED
Zambon, F.Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica,via del Fosso del Cavaliere, 00133 Roma, ItalyUNSPECIFIED
Frigeri, A.National Institute of Astrophysics, Rome, ItalyUNSPECIFIED
Ciarniello, M.1 INAF - IAPS, Istituto di Astrofisica e Planeto logia Spaziali, Rome, ItalyUNSPECIFIED
Raponi, AINAF-IAPS Istituto di Astrofisica e Planetologia Spaziali, Rome, ItalyUNSPECIFIED
Tosi, F.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Capria, M. T.Instituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Raymond, Carol A.Jet Propulsion Lab, California Institute of Technology, Pasadena, CA, United States.UNSPECIFIED
Russell, Christopher T.Institute of Geophysics, UCLA, Los Angeles, CA, United States.UNSPECIFIED
Date:2019
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:318
DOI :10.1016/j.icarus.2017.12.011
Page Range:pp. 241-250
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Dawn Ceres Spektroskopie
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 - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Stephan, Dr.rer.nat. Katrin
Deposited On:04 Dec 2019 12:49
Last Modified:04 Dec 2019 12:49

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