Oxide mineralogy and trace element chemistry as an index to magma evolution and Marathon-type mineralization in the Eastern Gabbro of the alkaline Coldwell Complex, Canada

Precise determination of major and trace elements in micrometer-scale ilmenite lamellae in titanomagnetite using LA-ICP-MS technique: application of regression analysis to time-resolved signals

“…15,16 Alternatively, a 'bulk' analytical strategy has been applied in many studies, in which larger laser spots (50-120 mm) are employed to incorporate both magnetite and ilmenite lamellae, then the obtained compositions are considered representative of the homogenous oxide solid solution prior to the oxidation-driven exsolution. 2,7,17,18 Analytical procedures using raster mode and lines across the magnetite grain were performed for the same purpose. 4,19,20 Obviously, applying 'bulk' analyses, the chemical differentiation of various trace components between the exsolved ilmenite and residual magnetite is obscured.…”