Published October 1971
| public
Journal Article
Uranium-bearing minerals of lunar rock 12013
Chicago
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Abstract
The U distribution in rock 12013 was studied by fission track and elemental mapping techniques. Major U-bearing phases are whitlockite, apatite, zircon, and phase β, which is a Zr-Ti mineral rich in Fe, Nb, Y, REE and containing up to 3.6% UO₂, 4.7% ThO₂, and 4.2% PbO. Calculated microprobe ages for phase β average 4.0 AE and are in reasonable agreement with Rb-Sr and K-Ar ages. Phase β plays a significant role in the U-Th-Pb systematics of rock 12013 and may play a similar role in the model ages of lunar soil.
Additional Information
It is a pleasure to acknowledge helpful discussions with D.L. Burnett. We thank A.J. Gancarz for his help in solving some of the analytical problems. E.L. Haines was supported in part by a special grant from the Director's Discretionary Fund, Jet Propulsion Laboratory. The research was supported by NASA contracts NAS 7-100 (JPL) and NAS 9-8074. The microprobe laboratory has been developed with the support of the National Science Foundation, the Jet Propulsion Laboratory, and the Union Pacific Foundation.Additional details
- Eprint ID
- 117927
- Resolver ID
- CaltechAUTHORS:20221121-962044600.1
- NASA/JPL
- NAS 7-100
- NASA
- NAS 9-8074
- NSF
- Union Pacific Foundation
- Created
-
2022-11-30Created from EPrint's datestamp field
- Updated
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2022-11-30Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 2030