Age of the moon: An isotopic study of uranium-thorium-lead systematics of lunar samples
Science
By: M. Tatsumoto and J.N. Rosholt
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Abstract
Concentrations of U, Th, and Pb in Apollo 11 samples studied are low (U. 0.16 to 0.87; Th, 0.53 to 3.4; Pb, 0.29 to 1.7, in ppm) but the extremely radiogenic lead in samples allows radiometric dating. The fine dust and the breccia have a concordant age of 4.66 billion years on the basis of 207Pb/206Pb, 206Pb/238U, 207Pb/235U, and 208Pb/232Th ratios. This age is comparable with the age of meteorites and with the age generally accepted for the earth. Six crystalline and vesicular samples are distinctly younger than the dust and breccia. The 238U/235U ratio is the same as that in earth rocks, and 234U is in radioactive equilibrium with parent 238U.
Suggested Citation
Tatsumoto, M., Rosholt, J., 1970, Age of the moon: An isotopic study of uranium-thorium-lead systematics of lunar samples: Science, v. 167, no. 3918, p. 461-463.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Age of the moon: An isotopic study of uranium-thorium-lead systematics of lunar samples |
| Series title | Science |
| Volume | 167 |
| Issue | 3918 |
| Year Published | 1970 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Science |
| First page | 461 |
| Last page | 463 |