MAJOR AND TRACE-ELEMENT ANALYSIS OF 15 JAPANESE IGNEOUS REFERENCE ROCKS BY XRFS AND INAA

Fifteen Japanese igneous reference rocks have been analyzed by X-ray f luorescence spectrometry and instrumental neutron activation analysis for major and trace elements, Agreement between measured and accepted values is generally favourable with, however, several exceptions, Smal l systematic discrepancies are noted for MgO, Na2O, Sr, Th, Eu, and Lu , which are likely the result of differences in calibration and/or ana lytical techniques, Zn generally shows poor agreement, suggesting that the rocks are not well characterized for this element.