Petrological and geochemical evolution of the Kymi stock, a topaz granite cupola within the Wiborg rapakivi batholith, Finland

The granite system near Betliar village (Gemeric Superunit, Western Carpathians): evolution of a composite silicic reservoir

“…On the other hand, lower zircon saturation temperatures (685-745 ˚C) determined for the fine-to medium-grained granites are comparable with those from highly evolved, P-and F-rich magmas, for instance from the Kymi stock, Finland (e.g. Haapala and Lukkari 2005).…”

“…Remarkable differences in HFSE and REE concentrations between the porphyritic and evolved equigranular medium-and fine-grained granites are characteristic of a protracted magmatic differentiation (e.g. Dostal and Chatterjee 1995;Ramirez and Menedez 1999;Haapala and Lukkari 2005;Antunes et al 2008). Fractional crystallization could have also been responsible for a decrease in Ti, Fe and Co, and an enrichment in incompatible elements (Ta, Nb, Rb, Cs etc.…”

An experimental study of tin partition between melt and aqueous fluid in F/Cl-coexisting magma

“…It is suggested that peralkalinity of granitic melt and high F contents in granites can lead to the enrichment of tin in melt phase, and therefore, they probably serve as a tin ore reservoir or an important transport medium for tin ore deposition. Many studies [9,[29][30][31][32]69] also have approved that some tin ores are substantially associated with high-F (topaz) granites. In addition, field reconnaissance has shown that some peralkaline granites are tin ore deposits [70][71][72] .…”

“…In fact, natural intrusive igneous magmas are different in fluorine and chlorine contents which are controlled mainly by melt generation, magma assimilation and fractional crystallization. Especially, many Sn-mineralized granites have high F contents and are associated with F-bearing minerals [29][30][31][32] . However, the data about tin partitioning between granitic silicate melt and coexisting aqueous fluid are less available in the chlorine/fluorine-coexisting magma system.…”

Can crystallization of olivine tholeiite give rise to potassic rhyolites?—an experimental investigation

“…The elevated fluorine content of both the melt composition and a coexisting vapor phase in these rock types is indicated by the presence of both magmatic and hydrothermally precipitated fluorite and topaz. Potassic granites such as the Wiborg Rapakivi batholith in Finland commonly contain late-stage topaz-bearing granitic bodies (Haapala and Lukkari 2005). Some potassic granite samples (e.g., from the Fig.…”