Implications for Lunar Crustal Evolution from Y-86032 and Dho 908. L. E. Nyquist 1,7 ,

Ar techniques [1,2,3] combining isotopic studies with mineralogical/petrological studies of the same clasts. As a result of these studies, we conclude that the lunar crust is composed of a variety of anorthosites, at least some of which must have formed as plutons in the earliest formed ferroan anorthosite crust. Sm-Nd data for lunar anorthosites: Several of the anorthositic clasts that we have studied were too small to contain mafic minerals in sufficient abundance for determination of internal Sm-Nd or Rb-Sr isochrons. We combine bulk (“whole rock”) Sm-Nd data with