Melt-mediated coupled dissolution-precipitation of zircon in metagranite, Bohemian Massif
Pavla Štípská·Pavlína Hasalová·Martin Ráček·Prokop Závada·Andrew R. C. Kylander-Clark·Stephen Collett
Abstract In zircon, transgressive textures cutting oscillatory zoning and associated chemical modifications are usually attributed to fluid-mediated coupled dissolution-precipitation (CDP). Here, we show an example of melt-mediated CDP in zircon from metagranite, with consequences on calculated ages and chemical composition. Zircon oscillatory zoning is commonly blurred and truncated by embayments and channels of replaced zircon with irregular and sharp boundaries. These are interpreted as repla