Published January 1972
| public
Journal Article
Gas retention and cosmic-ray exposure ages of a basalt fragment from Mare Fecunditatis
- Creators
- Huneke, J. C.
- Podosek, F. A.
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Wasserburg, G. J.
Abstract
An ⁴⁰Ar-³⁹Ar gas retention age and an ³⁸Ar-³⁷Ar cosmic ray exposure age have been determined on a total rock sample of the basalt fragment B-1 returned from Mare Fecunditatis by the Luna 16 mission. This sample shows large low-temperature loss of radiogenic ⁴⁰Ar but defines a reasonably good high-temperature plateau at 3.45 ± 0.04 AE. This is presumed to date a period of igneous activity in Mare Fecunditatis. This activity is later than that at Mare Tranquillitatis but earlier than at Oceanus Procellarum and Mare Imbrium. The cosmic ray exposure age is 475 m.y.
Additional Information
We gratefully acknowledge the essential support of Pal Young and A1 Massey. We are indebted to the Academy of Sciences of the USSR for making samples returned by the Luna 16 probe available for general scientific study and to the Lunar Sample Analysis Planning Team for entrusting us with the analysis of the unique fragment B-1. This work was supported by NASA Contract NAS-9-8074 and NSF grant GP-19887.Additional details
- Eprint ID
- 117974
- Resolver ID
- CaltechAUTHORS:20221122-23467700.5
- NAS-9-8074
- NASA
- GP-19887
- NSF
- Created
-
2022-11-28Created from EPrint's datestamp field
- Updated
-
2022-11-28Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 2098