The composition of stony meteorites (V) some aspects of the composition of the basaltic achondrites - Ahrens, L.H.; Von Michaelis, H. (Elsevier)
Unique compositional features characterize the basaltic achondrites (eucrites and howardites), notably; remarkably uniform Si and almost uniform Fe contents; a constant Ca/Al ratio which is equivalent to that of the chondrites; an almost uniform Na/K ratio also similar in magnitude to that in the chondrites and a seemingy unusually well-developed inverse Ca (or Al)-Mg relationship. These compositional features suggest strongly that the basaltic achondrites could not have been formed by a process of magnetic differentiation and that physical processes played a dominant role.
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Keywords: TE-TZ; U