Migration of radiogenic strontium during metamorphism
- Creators
-
Wasserburg, G. J.
- Albee, A. L.
- Lanphere, M. A.
Abstract
Study of the concentration and isotopic composition of strontium and rubidium in hornblende diorite dikes and sills of Precambrian age from the Panamint Mountains of California showed that these rock systems were enriched in radiogenic Sr during a late Mesozoic metamorphism. Enrichments in radiogenic Sr were observed for total-rock samples which yielded apparent ages of up to 34,000 m.y., although there is no obvious petrographic evidence for such metasomatic changes. These results indicate that some caution is necessary in interpreting the Sr isotopic composition of rocks in terms of their original source or in assuming that 'total rocks' form closed systems. In general, the initial isotopic Sr composition should be determined, not assumed.
Additional Information
Copyright 1964 by the American Geophysical Union. (Manuscript received April 20, 1964; revised July 2, 1964.) We would like to thank Mr. B. Troxel of the California Bureau of Mines for his very kind efforts in obtaining some samples of diabase. This work was supported by grants from the National Science Foundation and the Atomic Energy Commission. Contribution 1256, Division of Geological Sciences, California Institute of Technology, Pasadena.Attached Files
Published - jgr3503.pdf
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Additional details
- Eprint ID
- 51502
- Resolver ID
- CaltechAUTHORS:20141110-110243393
- NSF
- Atomic Energy Commission
- Created
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2014-11-10Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)
- Other Numbering System Name
- Caltech Division of Geological Sciences
- Other Numbering System Identifier
- 1256