Murrell, M. T. and Burnett, D. S. (1982) Extreme Pu-U and Possible Pu-REE Fractionation in Unequilibrated Chondrites. Meteoritics, 17 (4). pp. 256-257. ISSN 0026-1114. https://resolver.caltech.edu/CaltechAUTHORS:20150427-082945452
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Abstract
The purpose of this study is to understand actinide chemistry in chondrites and to evaluate unequilibrated chondrites for either Pu/U or Pu/Nd chronology. Using fission track radiography for Nadiabondi (H5/(Murrell and Burnett, 1982), Dhajala (H3,4), Bremervorde (H3), Sharps (H3), and Tieschitz (H3), we find that U is primarily located in chondrule glass (50-500 ppb, average of ~ 100 ppb). Apatite from the unequilibrated chondrites contains 150-200 ppb U while whitlockite contains < 17 ppb [low compared to type-6 chondrites which have 1-6 ppm U in apatite and ~ 200 ppb in whitlockite (Pellas and Storzer, 1975)]. Nadiabondi phosphates are intermediate (Murrell and Burnett, 1982). These observations suggest that the phosphate U content increases with petrologic type (Pellas and Storzer, 1975), with U obtained from chondrule glass during metamorphism.
| Item Type: | Article | ||||||
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| Additional Information: | © 1982 Meteoritical Society. Provided by the Nasa Astrophysics Data System. | ||||||
| Group: | UNSPECIFIED, Division of Geological and Planetary Sciences | ||||||
| Issue or Number: | 4 | ||||||
| Record Number: | CaltechAUTHORS:20150427-082945452 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150427-082945452 | ||||||
| Official Citation: | Extreme Pu-U and Possible Pu-REE Fractionation in Unequilibrated Chondrites Murrell, M. T.; Burnett, D. S. Meteoritics, Vol. 17, p.256-257, 12/1982 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 56989 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Ruth Sustaita | ||||||
| Deposited On: | 27 Apr 2015 16:32 | ||||||
| Last Modified: | 09 Mar 2020 13:18 |
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