A reconnaissance of trace elements in anorthoclase megacrysts

ABSTRACT. Major, minor, and trace elements were measured with electron and ion microprobes for eighteen anorthoclase megacrysts from five locations. Compari-sons with concentration ranges tabulated by Smith (1974) show excellent agreement except for consistently ower values of Mg and B. The discrepa...

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Bibliographic Details
Main Authors: R. A. Mason, J. V. Smith, J. B. Dawson, S. B. Treves
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 1982
Subjects:
Copyriffht he Mineralogical Society
Antarc*
Antarctica
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.628.5847
http://www.minersoc.org/pages/Archive-MM/Volume_46/46-338-7.pdf
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Summary:ABSTRACT. Major, minor, and trace elements were measured with electron and ion microprobes for eighteen anorthoclase megacrysts from five locations. Compari-sons with concentration ranges tabulated by Smith (1974) show excellent agreement except for consistently ower values of Mg and B. The discrepancy for Mg probably reflects Mg-rich impurities contaminating samples analysed by bulk methods. The cause of the discrepancy for B is unknown and deserves further study. Samples from Mt. Erebus, Antarctica, contain glass inclusions from which the following crystal/liquid partition coeffi-

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