MINERALOGY AND GEOCHEMISTRY OF LUNAR METEORITE QUEEN-ALEXANDRA RANGE-93069

Queen Alexandra Range (QUE) 93069 is a glass-rich regolith breccia der ived from the lunar highlands. The high abundance of glassy fragments, the presence of agglutinates, the small size of all mineral and glass fragments, the presence of mostly melt rocks, and the low abundance o f pristine lunar crustal rocks, all indicate that QUE 93069 is derived from a mature regolith. This conclusion is also supported by its high siderophile element content. The most common mafic mineral is pyroxen e, with compositions that indicate derivation from ferroan ANT suite r ocks. Rare gabbro differentiation products may be indicated by the pre sence of silica, fayalitic olivine, and one pyroxferroite grain. Lithi c fragments are mostly meta-melt rocks of ANT composition. The glass c ompositions are dominated by troctolitic anorthosite compositions, fol lowed by gabbroic anorthosite and noritic anorthosite. Most glasses ar e ol-normative in composition. Some rare basic glasses of noritic comp osition were observed. Glass fragments and matrix glasses are alkali-p oor, except for some rare alkali-rich shards. The bulk chemical compos ition of QUE 93069, as well as the rare-earth-element (REE) abundance pattern, is very similar to that of other highlands meteorites, such a s MAC 88105 and Y-86032 and to average lunar highlands crust. One smal l porous clast was found to be very rich in volatile elements, as well as in most lithophile and siderophile elements. As this sample also c ontains abundant sulfides, the enrichments could be related to element mobilization and redistribution by volatile sulfur species.