A Combined Geochemical and Geochronological Investigation of Niocalite from the Oka Carbonatite Complex , Canada

This study is the first to report a detailed geochemical investigation and in situ U-Pb ages for niocalite, which occurs within carbonatite from the Bond Zone area of the Oka Carbonatite Complex (Canada). Niocalite is a Nb-disilicate member of the låvenite−cuspidine group. The major element composition of the niocalite studied here is relatively homogeneous… (More)