Fractionation of Boron Isotopes in Icelandic Hydrothermal Systems

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Boron isotope ratios have been determined in a variety of different geothermal waters from hydrothermal systems across Iceland. Isotope ratios from the high temperature meteoric water recharged systems reflect the isotope ratio of the host rocks without any apparent fractionation. Seawater recharged geothermal systems exhibit more positive {delta}{sup 11}B values than the meteoric water recharged geothermal systems. Water/rock ratios can be assessed from boron isotope ratios in the saline hydrothermal systems. Low temperature hydrothermal systems also exhibit more positive {delta}{sup 11}B than the high temperature systems, indicating fractionation of boron due to adsorption of the lighter isotope onto secondary minerals. ... continued below

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Aggarwal, J.K. & Palmer, M.R. January 1, 1995.

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Boron isotope ratios have been determined in a variety of different geothermal waters from hydrothermal systems across Iceland. Isotope ratios from the high temperature meteoric water recharged systems reflect the isotope ratio of the host rocks without any apparent fractionation. Seawater recharged geothermal systems exhibit more positive {delta}{sup 11}B values than the meteoric water recharged geothermal systems. Water/rock ratios can be assessed from boron isotope ratios in the saline hydrothermal systems. Low temperature hydrothermal systems also exhibit more positive {delta}{sup 11}B than the high temperature systems, indicating fractionation of boron due to adsorption of the lighter isotope onto secondary minerals. Fractionation of boron in carbonate deposits may indicate the level of equilibrium attained within the systems.

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  • Proceedings of The 17th New Zealand Geothermal Workshop 1995

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  • Report No.: GEO-PROC-95-02
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 895920
  • Archival Resource Key: ark:/67531/metadc887813

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  • January 1, 1995

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 4:17 p.m.

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Aggarwal, J.K. & Palmer, M.R. Fractionation of Boron Isotopes in Icelandic Hydrothermal Systems, article, January 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc887813/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.