The absorption-peak map of Mare Serenitatis obtained by a hyper-spectral telescope

Details The absorption-peak map of Mare Serenitatis obtained by a hyper-spectral telescope The absorption-peak map of Mare Serenitatis obtained by a hyper-spectral telescope

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ep%26s...60..425o&link_type=abstract

Earth, Planets and Space, Volume 60, p. 425-431.

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The Mg-number [Mg# = atomic Mg/(Mg+Fe)] serves as an important petrologic discriminator when analyzing and understanding lunar rocks. Variations in the Mg# shift the wavelength of the absorption spectra of ferrous iron, which peak at around 1000 nm. Based on the image cubes of the Moon obtained by the Advanced Lunar Imaging Spectrometer (ALIS), we detected the shift in the absorption spectra of ferrous iron and built up an absorption-peak map of Mare Serenitatis. The wavelength of the absorption peak shows an 11-nm shift in Mare Serenitatis. Since the degree of space weathering can be considered to be almost the same as that within the same lava unit and Ca content cannot change without changing Mg# during magma differentiation, these shifts of the peak absorption spectra suggest that there is Mg# variation in at least the same lava unit.

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