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Experimental geochemistry of Pu and Sm and the thermodynamics of trace element partitioning

Jones, John H. and Burnett, Donald S. (1987) Experimental geochemistry of Pu and Sm and the thermodynamics of trace element partitioning. Geochimica et Cosmochimica Acta, 51 (4). pp. 769-782. ISSN 0016-7037. doi:10.1016/0016-7037(87)90091-3.

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The partitioning of Pu and Sm between diopside/liquid and whitlockite/liquid has been investigated experimentally to evaluate the geochemical coherence of Pu and the light REEs. ^(Pu)D/^(Sm)D is 2 ~ for both diopsidic pyroxene and whitlockite. This small amount of fractionation would be decreased further if Pu were compared to Ce or Nd. Our experimental results thus validate the suggestion that Pu behaves as a LREE during igneous processes in reducing environments. Our data and the data of Ray et al. (1983) indicate that temperature rather than melt composition is the most important control on elemental partitioning. This is true even though we demonstrate that additions of only 1–2 wt.% of P2_O_5 to the diopside-anorthite-albite system change ^(Pu)D_(cpx) by a factor of two. Our data suggest that P_2O_5 in aluminosilicate melts serves as a complexing agent for the actinides and lanthanides.

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Burnett, Donald S.0000-0001-9521-8675
Additional Information:© 1987 Pergamon Press Ltd. Received 7 May 1986, Accepted 24 December 1986. We thank C. Lesher and R. Nielsen for constructive reviews. T. Benjamin provided advice and assistance during the experimental portion of this study. This work was supported by NASA grants NSG 7202 and NAG 9-39 and NSF grant EAR76-84402. Editorial handling: E. B. Watson.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
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Issue or Number:4
Record Number:CaltechAUTHORS:20150427-103522711
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Official Citation:John H Jones, Donald S Burnett, Experimental geochemistry of Pu and Sm and the thermodynamics of trace element partitioning, Geochimica et Cosmochimica Acta, Volume 51, Issue 4, April 1987, Pages 769-782, ISSN 0016-7037, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57002
Deposited By: Ruth Sustaita
Deposited On:27 Apr 2015 19:24
Last Modified:10 Nov 2021 21:06

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