Plagioclase feldspars were separated from lunar soil samples and their compositions were determined by electron-microprobe analysis followed by etching and track counting in an effort to find effects of early solar activity. The feldspars were assigned on this basis to three major lithologies: mare basalts, anorthositic rocks, and KREEP rock. The results are in sharp contrast to Poupeau et al.'s (1973) observations on track densities in plagioclase crystals in the Luna 16 soil: no evidence is found for an early active sun, although the evidence does not preclude this possibility, either.
Early active sun - Radiation history of distinct components in fines
Lunar Science Conference ; 1974 ; Houston, TX
1974-01-01
Sonstige
Keine Angabe
Englisch
Online Contents | 2014
INDUSTRY NEWS - Immigration fines: Commercial Motor exposes Home Office "fair fines" sham.
Online Contents | 2003
NTRS | 1970
|Truck News - Immigrant fines challenged
Online Contents | 2000
Total emittance of lunar fines.
NTRS | 1972
|