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

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We present the first experimental radium mineral/melt partitioning data, specifically between anorthite and a CMAS melt at atmospheric pressure. Ion microprobe measurement of coexisting anorthite and glass phases produces a molar D{sub Ra} = 0.040 {+-} 0.006 and D{sub Ra}/D{sub Ba} = 0.23 {+-} 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.

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Miller, S; Burnett, D; Asimow, P; Phinney, D & Hutcheon, I March 8, 2007.

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We present the first experimental radium mineral/melt partitioning data, specifically between anorthite and a CMAS melt at atmospheric pressure. Ion microprobe measurement of coexisting anorthite and glass phases produces a molar D{sub Ra} = 0.040 {+-} 0.006 and D{sub Ra}/D{sub Ba} = 0.23 {+-} 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.

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PDF-file: 17 pages; size: 0.3 Mbytes

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  • Journal Name: American Mineralogist , vol. 92, no. 8-9, August 1, 2007, pp. 1535-1538; Journal Volume: 92; Journal Issue: 8-9

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  • Report No.: UCRL-JRNL-229336
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 940494
  • Archival Resource Key: ark:/67531/metadc901994

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  • March 8, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 7, 2016, 11:30 a.m.

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Miller, S; Burnett, D; Asimow, P; Phinney, D & Hutcheon, I. Experimental study of radium partitioning between anorthite and melt at 1 atm, article, March 8, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc901994/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.