Compositional diversity and geologic insights of the Aristarchus crater from Moon Mineralogy Mapper data
Article first published online: 10 MAY 2011
Copyright 2011 by the American Geophysical Union.
Journal of Geophysical Research: Planets (1991–2012)
Volume 116, Issue E6, June 2011
How to Cite
2011), Compositional diversity and geologic insights of the Aristarchus crater from Moon Mineralogy Mapper data, J. Geophys. Res., 116, E00G12, doi:10.1029/2010JE003726., et al. (
- Issue published online: 10 MAY 2011
- Article first published online: 10 MAY 2011
- Manuscript Accepted: 25 JAN 2011
- Manuscript Revised: 30 DEC 2010
- Manuscript Received: 31 AUG 2010
- impact cratering;
 The Moon Mineralogy Mapper (M3) acquired high spatial and spectral resolution data of the Aristarchus Plateau with 140 m/pixel in 85 spectral bands from 0.43 to 3.0 μm. The data were collected as radiance and converted to reflectance using the observational constraints and a solar spectrum scaled to the Moon-Sun distance. Summary spectral parameters for the area of mafic silicate 1 and 2 μm bands were calculated from the M3 data and used to map the distribution of key units that were then analyzed in detail with the spectral data. This analysis focuses on five key compositional units in the region. (1) The central peaks are shown to be strongly enriched in feldspar and are likely from the upper plagioclase-rich crust of the Moon. (2) The impact melt is compositionally diverse with clear signatures of feldspathic crust, olivine, and glass. (3) The crater walls and ejecta show a high degree of spatial heterogeneity and evidence for massive breccia blocks. (4) Olivine, strongly concentrated on the rim, wall, and exterior of the southeastern quadrant of the crater, is commonly associated the impact melt. (5) There are at least two types of glass deposits observed: pyroclastic glass and impact glass.