Mineralogy, petrology, and chemistry of basalt fragments returned by Luna 16

Authors :: Albee, A. L
Chodos, A. A
Gancarz, A. I
Haines, E. L
Papanastassiou, D. A
Ray, L
Tera, F
Wasserburg, G. J
Wen, T
Publication Year :: 1974
Publisher :: United States: NASA Center for Aerospace Information (CASI), 1974.
Abstract: Mineralogical, petrological, and chemical analyses, along with Rb-Sr age and Ar-40/Ar-39 measurements, were carried out with the B-1 sample returned from the Luna 16 mission. The sample, weighing 62 mg, is a fine-grain basalt of ophitic structure. It differs from the Apollo samples in that the pyroxene and plagioclass contents are almost identical, and the ilmenite content (7%) lies between those of the Apollo-11 and Apollo-12 samples. Chemically, it is characterized by a high Sr content and a high K/U ratio.