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    Western oceanus procellarum as seen by c1xs on chandrayaan-1

    Weider, S.Z. and Joy, K.H. and Crawford, Ian and Kellett, B.J. and Swinyard, B.M. and Howe, C.J. (2014) Western oceanus procellarum as seen by c1xs on chandrayaan-1. Icarus 229 , pp. 254-262. ISSN 0019-1035.

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    We present the analysis of an X-ray fluorescence (XRF) observation of the western part of Oceanus Procellarum on the Moon’s nearside made by the Chandrayaan-1 X-ray Spectrometer on 10th February 2009. Through forward modelling of the X-ray spectra, we provide estimates of the MgO/SiO2 and Al2O3/SiO2 ratios for seven regions along the flare’s ground track. These results are combined with FeO and TiO2 contents derived from Clementine multispectral reflectance data in order to investigate the compositional diversity of this region of the Moon. The ground track observed consists mainly of low-Ti basaltic units, and the XRF data are largely consistent with this expectation. However, we obtain higher Al2O3/SiO2 ratios for these units than for most basalts in the Apollo sample collection. The widest compositional variation between the different lava flows is in wt% FeO content. A footprint that occurs in a predominantly highland region, immediately to the north of Oceanus Procellarum, has a composition that is consistent with mixing between low-Ti mare basaltic and more feldspathic regoliths. In contrast to some previous studies, we find no evidence for systematic differences in surface composition, as determined through X-ray and gamma-ray spectroscopy techniques.


    Item Type: Article
    Additional Information: NOTICE: this is the author’s version of a work that was accepted for publication in Icarus. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Icarus vol. 229, (February 2014) DOI: 10.1016/j.icarus.2013.11.019
    Keyword(s) / Subject(s): Moon, Surface, Regoliths, Gamma-ray spectroscopy, X-ray spectroscopy
    School: School of Science > Earth and Planetary Sciences > UCL/Birkbeck Centre for Planetary Sciences
    Depositing User: Administrator
    Date Deposited: 22 Nov 2013 14:12
    Last Modified: 10 Jun 2021 05:15


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