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Experimental study of radium partitioning between anorthite and melt at 1 atm

Miller, Sarah A. and Burnett, Donald S. and Phinney, Douglas I. and Hutcheon, Ian D. and Asimow, Paul D. (2007) Experimental study of radium partitioning between anorthite and melt at 1 atm. American Mineralogist, 92 (8-9). pp. 1535-1538. ISSN 0003-004X. doi:10.2138/am.2007.2640.

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We present the first experimental radium mineral/melt partitioning data, specifically between anorthite and a CMAS melt at atmospheric pressure. ^(226)Ra disequilibria are an important chronometer of recent magmatic activity. Ion microprobe measurement of coexisting anorthite and glass phases produces a molar D_Ra = 0.040 ± 0.006 and D_(Ra)/D_(Ba) = 0.24 ± 0.05 at 1400 °C. Our results indicate that lattice strain partitioning models fit the divalent (Ca, Sr, Ba, Ra) partition coefficient data of this study well, supporting previous work on crustal melting and magma chamber dynamics that has relied on such models to approximate radium partitioning behavior in the absence of experimentally determined values.

Item Type:Article
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URLURL TypeDescription
Miller, Sarah A.0000-0002-3181-1426
Burnett, Donald S.0000-0001-9521-8675
Asimow, Paul D.0000-0001-6025-8925
Additional Information:© 2007 Mineralogical Society of America. Manuscript received: March 19, 2007; manuscript accepted: May 10, 2007; manuscript handled by Bryan Chakoumakos. The authors thank Haick Issaian and Andre Jefferson of the Caltech Safety Office for their time and expertise in assisting with safe handling of materials. NORIT Americas, Inc. generously donated activated charcoal for radon containment. Constructive reviews by Kari Cooper and Ken Sims improved the manuscript. This work was supported by NASA grants NAG5-11640 and NNG05GH79G to D. Burnett and NNH04AB47I to I. Hutcheon, NSF EAR-0239513 to P. Asimow and LLNL Laboratory Directed Research and Development funding. This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under Contract W-7405-ENG-48.
Funding AgencyGrant Number
LLNL Laboratory Directed Research and Development fundingUNSPECIFIED
Department of Energy (DOE)W-7405-Eng-48
Subject Keywords:Radium; anorthite; plagioclase; partition coefficient; partitioning; clinopyroxene; barium; strontium
Issue or Number:8-9
Record Number:CaltechAUTHORS:20120830-094514028
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33702
Deposited By: Jason Perez
Deposited On:30 Aug 2012 17:11
Last Modified:09 Nov 2021 21:36

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