Two-phase late Paleozoic magmatism (~ 313–312 and ~ 299–298 Ma) in the Lusatian Block and its relation to large scale NW striking fault zones: evidence from zircon U–Pb CA–ID–TIMS geochronology, bulk rock- and zircon chemistry

Abstract Late Paleozoic (Variscan) magmatism is widespread in Central Europe. The Lusatian Block located the NE Bohemian Massif and it part of Saxothuringian Zone Variscan orogen. It bordered by two major NW-trending shear zones, Intra-Sudetic Fault towards Elbe SW. scarce igneous rocks are situated close to these faults. We investigated 19 samples from plutonic volcanic Block, considering all petrological varieties (biotite-bearing granites Koenigshain Stolpen plutons, amphibole-bearing three boreholes, several dykes, volcanites intramontane Weissig basin). applied whole-rock geochemistry (18 samples) zircon evaporation dating (19 samples). From data, we selected six representative for additional SHRIMP CA–ID–TIMS dating. For pluton, possible protoliths were identified using Nd-isotopes, Hf- O-isotopes. new age data allow a subdivision into distinct magmatic episodes. spatial relation groups either (298–299 Ma) or (312–313 together with reports on fault-bound character dated intrusions suggests an interpretation as post-collisional faulting This assumption periods confirmed compilation recently published U–Pb further Zone. New geochemical us exclude dominant sedimentary protolith pluton supposed previous investigations. conclusion mainly based O- Hf-isotope scarcity inherited zircons. Instead, acid intermediate main source I-type granitoids pluton.