Laboratory spectroscopic detection of hydration in pristine lunar regolith

Matthew R.M. Izawa, Edward A. Cloutis, Daniel M. Applin, Michael A. Craig, Paul Mann, Matthew Cuddy

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Reflectance spectroscopy of Apollo lunar soil samples curated in an air- and water-free, sealed environment since recovery and return to Earth has been carried out under water-, oxygen-, CO2- and organic-controlled conditions. Spectra of these pristine samples contain features near 3 μm wavelength similar to those observed from the lunar surface by the Chandrayaan-1 Moon Mineralogy Mapper (M3), Cassini Visual and Infrared Mapping Spectrometer (VIMS), and Deep Impact Extrasolar Planet Observation and Deep Impact Extended Investigation (EPOXI) High-Resolution Instrument (HRI) instruments. Spectral feature characteristics and inferred OH/H2O concentrations are within the range of those observed by spacecraft instruments. These findings confirm that the 3 μm feature from the lunar surface results from the presence of hydration in the form of bound OH and H2O. Implantation of solar wind H+ appears to be the most plausible formation mechanism for most of the observed lunar OH and H2O.

Original languageEnglish
Pages (from-to)157-164
Number of pages8
JournalEarth and Planetary Science Letters
Volume390
DOIs
Publication statusPublished - Mar 15 2014
Externally publishedYes

Keywords

  • Apollo samples
  • Lunar hydration
  • Lunar regolith
  • Reflectance spectroscopy

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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