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Science 25 May 1973:
Vol. 180. no. 4088, pp. 858 - 861
DOI: 10.1126/science.180.4088.858
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Articles

Volatile Elements in Apollo 16 Samples: Possible Evidence for Outgassing of the Moon

Urs Krahenbuhl 1, R. Ganapathy 1, John W. Morgan 1, and Edward Anders 1

1 Enrico Fermi Institute and Department of Chemistry, University of Chicago, Chicago, Illinois 60637

Several Apollo 16 breccias, including one containing goethite, are strikingly enriched in volatile elements such as bromine, cadmium, germanium, antimony, thallium, and zinc. Similar but smaller enrichments are found in all highland soils. It appears that volcanic processes took place in the lunar highlands, involving the release of volatiles including water. The lunar thallium/uranium ratio is 2 x 10-4 of the cosmic ratio, which suggests that the moon's original water content could not have exceeded the equivalent of a layer 22 meters deep. The cataclastic anorthosites at the Apollo 16 site may represent deep ejecta from the Nectaris basin.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Water and Carbon in Rusty Lunar Rock 66095.
I. Friedman, I. Friedman, K. G. Hardcastle, and J. D. Gleason (1974)
Science 185, 346-349
   Abstract »    PDF »
Organic Compounds in Meteorites: They may have formed in the solar nebula, by catalytic reactions of carbon monoxide, hydrogen, and ammonia.
E. Anders, E. Anders, R. Hayatsu, and M. H. Studier (1973)
Science 182, 781-790
   Abstract »    PDF »


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