Ferroan anorthosite: A widespread and distinctive lunar rock type
Abstract
Eight of eleven Apollo 16 rake-sample anorthosites are very similar to each other, to hand-specimen Apollo 16 anorthosites, and to Apollo 15 anorthosites. They have feldspar An 96.6, both high- and low-Ca pyroxene with a restricted range of (low-magnesium) composition, minor olivine (∼ Fo 60), traces of ilmenite and chromite, and originally coarse-grained, but now cataclastic texture. Such ferroan anorthosite is evidently a coherent, distinctive and widespread lunar rock type of cumulate origin which may not necessarily be very closely related genetically to other highland rock types.
- Publication:
-
Earth and Planetary Science Letters
- Pub Date:
- November 1974
- DOI:
- 10.1016/0012-821X(74)90003-X
- Bibcode:
- 1974E&PSL..24...15D
- Keywords:
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- Anorthosite;
- Lunar Rocks;
- Mineralogy;
- Apollo 15 Flight;
- Apollo 16 Flight;
- Lunar Crust;
- Lunar Evolution;
- Microstructure