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    Ion microprobe study of intragrain micropermeability in alkali feldspars

    Alkali feldspar cleavage fragments from the Klokken layered syenite, South Greenland, were heated to 700°C at 0.1 GPa in 99% H2 18O for 75 h. These samples were then polished and imaged by ion microprobe for 18O....

    F. David, L. Walker in Contributions to Mineralogy and Petrology (1990)