A reconnaissance of trace elements in anorthoclase megacrysts

• 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

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-