Mineralogical Variations within the S-Type Asteroid Class

@article{Gaffey1993MineralogicalVW,
  title={Mineralogical Variations within the S-Type Asteroid Class},
  author={Michael J. Gaffey and J F Bell and R. Hanbury Brown and Thomas H. Burbine and Jennifer Lynn Piatek and Kevin Lowell Reed and Damon A. Chaky},
  journal={Icarus},
  year={1993},
  volume={106},
  pages={573-602}
}
Abstract A systematic spectral analysis has been Carried out on a large subset (39 of 144) of the S-type asteroid population. The S-asteroid class includes a number of distinct compositional subtypes [designated S(I)-S(VII)] which exhibit surface silicate assemblages ranging from pure olivine (dunites) through olivine-pyroxene mixtures to pure pyroxene or pyroxene-feldspar mixtures (basalts). S-asteroid absorption bands are weaker than expected for pure mafic silicate assemblages, indicating… 
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