Chemical compositions of Li-tourmaline and mica from Nagatare, Fukuoka Prefecture, Japan

Abstract

Tourmaline can include variety elements, so the changes of chemical compositions show a chemical development of rocks (Jolliff et al., 1986). A mineralogical study of Li-tourmaline from Japan has not been subjected in detail. Tourmaline from Nagatare Pegmatite, Fukuoka Prefecture, were identified 5 types of and analyzed. Each type had different chemical compositions and a substitution of Al and Li for Fe. Mineral species were composed of elbaite, fluor-elbaite, rossmanite, schorl and fluor-schorl. There was a type enriched with Fe and Mn on rim. A part of body for pink type was replaced with mica, mostly muscovite.