For the soils of two lunar highland sites from which samples were returned by the Luna 20 probe and the Apollo 16 mission, Rb-Sr data are presented. For comparison, the results of some additional analyses of Apollo 15 soils are also given. All these soils indicate that an early lunar differentiation process occurred in the interval of 4.3-4.6 b.y. and resulted in the formation of a crust rich in K, Rb, U, and Th.
Rb-Sr systematics of Luna 20 and Apollo 16 samples.
1972-12-01
Sonstige
Keine Angabe
Englisch
U-Th-Pb systematics of Apollo 12 lunar samples
NTRS | 1971
|U-Th-Pb systematics of some Apollo 16 lunar samples
NTRS | 1973
|