Magmatic and Postmagmatic Processes in Tin-mineralized Granites: Topaz-bearing Leucogranite in the Eurajoki Rapakivi Granite Stock, Finland

Abstract

The 1·57 Ga Eurajoki stock in southwestern Finland is composed been overemphasized at the expense of exsolution and reof biotite–hornblende–fayalite granite, biotite granites and late-stage crystallization. topaz-bearing granite, as well as related topaz-bearing rhyolite (ongonite) dykes. Miarolitic cavities indicate the presence of a separate fluid phase during late stages of crystallization of the topazbearing granite, and greisen-type Sn–Be–W–Zn mineralization is closely associated with it. Subsolidus reactions have modified the