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Boron Isotopic Composition of the Subcontinental Lithospheric Mantle


Abstract Boron concentrations and isotopic composition of phlogopite mica, amphibole, and selected coexisting anhydrous phases in mantle-derived xenoliths from the Kaapvaal Craton were measured by secondary ion mass spectrometry in an effort to better understand the B isotope geochemistry of the subcontinental lithospheric mantle (SCLM) and its implications for the global geochemical cycle of B in the mantle. These samples display a wide, and previously unrecognized, range in their boron contents and isotopic compositions reflecting a complex history involving melt depletion and metasomatism by subduction- and plume-derived components, as well as late stage isotopic exchange related to kimberlite emplacements. Micas from ancient lithospheric harzb... (more)
Created Date 2014
Contributor Guild, Meghan R. (Author) / Hervig, Richard L (Advisor) / Bell, David R (Committee member) / McNamara, Allen (Committee member) / Arizona State University (Publisher)
Subject Geochemistry / Geology / Boron / mantle xenoliths / metasomatism / phlogopite / Secondary Ion Mass Spectrometry / subcontinental lithospheric mantle
Type Masters Thesis
Extent 69 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Masters Thesis Geological Sciences 2014
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis