Metasomatic reactions triggered by localized and dynamically evolving fluid flux record multistage intrusion history: An example from the syntectonic Caçapava do Sul Granitic Complex, Southern Brazil

In this study, we report field, microstructural and geochronological evidence for localized and dynamically evolving fluid flux associated with the syntectonic intrusion of the Caçapava do Sul Granitic Complex into the dolomitic marbles of the Passo Feio Metamorphic Complex (Dom Feliciano Belt, southern Brazil). The marbles were intruded by mafic intrusions between 600 and 580 Ma followed by felsic intrusions from 578 to 557 Ma, triggering a set of metasomatic reactions in the host and intrusive rocks. Skarns and hydrothermal veins were formed at different stages of pluton assembly and represent useful indicators of the pathways used by the magmatic fluids when infiltrating the dolomitic marbles.