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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. ; Athiray, P. S. ; Sreekumar, P. ; Kellett, B. J. ; Alha, L. ; Howe, C. J. ; Joy, K. H. ; Grande, M. ; Huovelin, J. ; Crawford, I. A. ; Unnikrishnan, U. ; Lalita, S. ; Subramaniam, S. ; Weider, S. Z. ; Nittler, L. R. ; Gasnault, O. ; Rothery, D.; Fernandes, V. A. ; Bhandari, N. ; Goswami, J. N. ; Wieczorek, M. A. ; C1XS Science Team, ; Anand, Mahesh; Holland, Andrew and Gow, Jason (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.

URL: http://www.sciencedirect.com/science/article/pii/S...
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.icarus.2011.04.010
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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 ~9 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: Journal Article
Copyright Holders: 2011 Elsevier Inc.
ISSN: 0019-1035
Keywords: Moon; surface; spectroscopy
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 29977
Depositing User: Jason Gow
Date Deposited: 09 Nov 2011 17:10
Last Modified: 17 Apr 2013 15:36
URI: http://oro.open.ac.uk/id/eprint/29977
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