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Science 22 January 1971:
Vol. 171. no. 3968, pp. 282 - 284
DOI: 10.1126/science.171.3968.282
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Articles

Potassium-Uranium Systematics of Apollo 11 and Apollo 12 Samples: Implications for Lunar Material History

Fraser P. Fanale 1 and Douglas B. Nash 1

1 Jet Propulsion Laboratory, California Institute of Technology, Pasadena

Apollo 11 and Apollo 12 lunar rock suites differ in their potassium-uranium abundance systematics. This difference indicates that relatively little exchange of regolith material has occurred between Mare Tranquillitatis and Oceanus Procellarum. The two suites appear to have been derived from materials of identical potassium and uranium content. It appears unlikely that bulk lunar material has the ratio of potassium to uranium found in chondrites. However, systematic differences in the potassium-uranium ratio between Apollo samples and crustal rocks of the earth do not preclude a common potassium-uranium ratio for bulk earth and lunar material.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Potassium-Uranium Systematics of Apollo 11 and Apollo 12 Lunar Samples and of Some Deep Earth Rocks.
D. E. Fisher, D. E. Fisher, F. P. Fanale, and D. B. Nash (1971)
Science 172, 1166-1167
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