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Extreme Pu-U and Possible Pu-REE Fractionation in Unequilibrated Chondrites

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 . http://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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http://adsabs.harvard.edu/abs/1982Metic..17R.256MADSArticle
Additional Information:© 1982 Meteoritical Society. Provided by the Nasa Astrophysics Data System.
Record Number:CaltechAUTHORS:20150427-082945452
Persistent URL:http://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:27 Apr 2015 16:32

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