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The Mineralogy of Ceres’ Nawish Quadrangle

Carrozzo, F. G. and Zambon, F. and De Sanctis, M. C. and Longobardo, A. and Raponi, A. and Stephan, K. and Frigeri, A. and Ammannito, E. and Ciarniello, M. and Combe, J.-Ph. and Palomba, E. and Tosi, F. and Raymond, C. A. and Russell, C. T. (2019) The Mineralogy of Ceres’ Nawish Quadrangle. Icarus, 318 . pp. 195-204. ISSN 0019-1035.

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Quadrangle Ac-H-08 Nawish is located in the equatorial region of Ceres (Lat 22°S-22°N, Lon 144°E- 216°E), and it has variable mineralogy and geology. Here, we report on the mineralogy using spectra from the Visible and InfraRed (VIR) mapping spectrometer onboard the NASA Dawn mission. This quadrangle has two generally different regions: the cratered highlands of the central and eastern sector, and the eastern lowlands. We find this dichotomy is also associated with differences in the NH_4-phyllosilicates distribution. The highlands, in the eastern part of the quadrangle, appear depleted in NH_4-phyllosilicates, conversely to the lowlands, in the north-western side. The Mg-phyllosilicates distribution is quite homogeneous across Nawish quadrangle, except for few areas. The 2.7 µm band depth is lower in the south-eastern part, e.g. in the Azacca ejecta and Consus crater ejecta, and the band depth is greatest for the Nawish crater ejecta, and indicates the highest content of Mg-phyllosilicates of the entire quadrangle. Our analysis finds an interesting relationship between geology, mineralogy, topography, and the age in this quadrangle. The cratered terrains in the highlands, poor in NH_4 phyllosilicates, are older (̴2 Ga). Conversely, the smooth terrain, such as with Vindimia Planitia, is richer in ammonia-bearing phyllosilicates and is younger (̴1 Ga). At the local scale, Ac-H-8 Nawish, displays several interesting mineralogical features, such as at Nawish crater, Consus crater, Dantu and Azzacca ejecta, which exhibit localized Na-carbonates deposits. This material is superimposed on the cratered terrains and smooth terrains and shows the typical depletion of phyllosilicates, already observed on Ceres in the presence of Na-carbonates.

Item Type:Article
Related URLs:
URLURL TypeDescription
De Sanctis, M. C.0000-0002-3463-4437
Longobardo, A.0000-0002-1797-2741
Raponi, A.0000-0003-4996-0099
Palomba, E.0000-0002-9101-6774
Russell, C. T.0000-0003-1639-8298
Additional Information:© 2018 Published by Elsevier Inc. Received 29 April 2017, Revised 19 June 2018, Accepted 13 July 2018, Available online 18 July 2018. We thank the Italian Space Agency (ASI). The VIR instrument was funded and coordinated by the ASI and built by Selex ES, with the scientific leadership of the Institute for Space Astrophysics and Planetology, Italian National Institute for Astrophysics, Italy, and is operated by the Institute for Space Astrophysics and Planetology, Rome, Italy. Thanks to the FC team for sharing the camera images.
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Record Number:CaltechAUTHORS:20180718-084500588
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Official Citation:F.G. Carrozzo, F. Zambon, M.C. De Sanctis, A. Longobardo, A. Raponi, K. Stephan, A. Frigeri, Ammannito, M. Ciarniello, J.-Ph. Combe, E. Palomba, F. Tosi, C.A. Raymond, C.T. Russell, The mineralogy of Ceres’ Nawish quadrangle, Icarus, Volume 318, 2019, Pages 195-204, ISSN 0019-1035, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87948
Deposited By: Tony Diaz
Deposited On:18 Jul 2018 18:14
Last Modified:09 Mar 2020 13:19

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