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Lunar X-ray fluorescence observations by the Chandrayaan-1 X-ray Spectrometer (C1XS): results from the nearside southern highlands

Narendranath, S. and Athiray, P.S. and Sreekumar, P. and Kellett, B.J. and Alha, L. and Howe, C.J. and Joy, K.H. and Grande, M. and Huovelin, J. and Crawford, Ian A. and Unnikrishnan, U. and Lalita, S. and Subramaniam, S. and Weider, S.Z. and Nittler, L.R. and Gasnault, O. and Rothery, D.A. and Fernandes, V.A. and Bhandari, N. and Goswami, J.N. and Wieczorek, M. (2011) Lunar X-ray fluorescence observations by the Chandrayaan-1 X-ray Spectrometer (C1XS): results from the nearside southern highlands. Icarus 214 (1), pp. 53-66. ISSN 0019-1035.

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Official URL: http://dx.doi.org/10.1016/j.icarus.2011.04.010

Abstract

The Chandrayaan-1 X-ray spectrometer (C1XS) flown on-board the first Indian lunar mission Chandrayaan-1, measured X-ray fluorescence spectra during several episodes of solar flares during its operational period of not, vert, similar9 months. The accompanying X-ray Solar Monitor (XSM) provided simultaneous spectra of solar X-rays incident on the Moon which are essential to derive elemental chemistry. In this paper, we present the surface abundances of Mg, Al, Si, Ca and Fe, derived from C1XS data for a highland region on the southern nearside of the Moon. Analysis techniques are described in detail including absolute X-ray line flux derivation and conversion into elemental abundance. The results are consistent with a composition rich in plagioclase with a slight mafic mineral enhancement and a Ca/Al ratio that is significantly lower than measured in lunar returned samples. We suggest various possible scenarios to explain the deviations.

Item Type: Article
Keyword(s) / Subject(s): Moon surface, elemental abundance
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Earth and Planetary Sciences
Depositing User: Administrator
Date Deposited: 04 May 2011 09:02
Last Modified: 17 Apr 2013 12:20
URI: http://eprints.bbk.ac.uk/id/eprint/3272

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