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- W1999806066 abstract "A K-Ar age of 2300 x 10(6) years has been determined for a sample of type A crystalline rock (57,34). The presence of an anomalously large quantity of 4 degrees Ar, in a sample of type C breccia (65,35) precluded the calculation of its K-Ar age. Both of the rock types are characterized by low Rb/Sr ratios and consequently low (87)Sr/(86)Sr values. The U-Th-Pb results for a sample of type D fines (84,33) yield a (207)Pb/(206)Pb age of 4760 x 10(6) years, but ages based on U-Pb and Th-Pb ratios are anomalously high. Isotopic compositions of Li, K, Rb, Sr, U, and Th are very close to the accepted values for terrestrial materials." @default.
- W1999806066 created "2016-06-24" @default.
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- W1999806066 date "1970-01-30" @default.
- W1999806066 modified "2023-10-18" @default.
- W1999806066 title "Age Determinations and Isotopic Abundance Measurements on Lunar Samples" @default.
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- W1999806066 doi "https://doi.org/10.1126/science.167.3918.479" @default.
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