Quantitative Electron Probe Microanalysis of Oxygen : Ti-Fe Oxides and Other Minerals

Abstract

Ouantitative electron probe microanalysis of oxygen enables us to measure the amount of oxygen in minerals using the peak intensity method. This analytical procedure is useful that the oxygen can be routinely measured together with other elements. By the microanalysis of oxygen of titanomagnetite grains, degrees of oxidation can be examined in one grain. As a result of oxidation of titanomagnetite, decrease of iron and increase of oxygen and titanium have been observed. Oxidation of titanomagnetite proceeds parallel to an equi-Ti/O line rather than equi-Ti/Fe line.