First Permian–Early Triassic zircon ages for tin-bearing granites from the Gemeric unit (Western Carpathians, Slovakia): connection to the post-collisional extension of the Variscan orogen and S-type granite magmatism

摘要: This study presents the first preliminary U–Pb zircon data on tin-bearing S-type granites from Gemeric unit of Western Carpathians (Slovakia). single dating controlled by cathodoluminescence suggests crystallization during Permian to Early Triassic (303–241 Ma) time. Post-crystallization, low-temperature metamorphic overprint is reflected partial Pb loss in zircons. These are younger than highly fractionated, S-type, tin- and rare-element-bearing leucogranites European Variscides. They may have resulted melting, triggered increased heat flow mantle below continental crust, most probably intruded post-collisional extension initial rifting Variscan orogenic belt. During Alpine orogeny, were affected a deformation metamorphism.