Th-U-total Pb timing constraints on the emplacement of the granitoid pluton of Stolpen, Germany
Authors
Katarzyna Lisowiec
Institute of Geological Sciences, Polish Academy of Sciences, Warsaw Research Centre, Twarda 51/55, 00-818 Warsaw; Institute of Geochemistry, Mineralogy and Petrology, University of Warsaw, Żwirki i Wigury 93, 02-089 Warsaw
Bartosz Budzyń
Institute of Geological Sciences, Polish Academy of Sciences, Kraków Research Centre, Senacka 1, 31-002 Kraków; Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, 30-063 Kraków
Ewa Słaby
Institute of Geological Sciences, Polish Academy of Sciences, Warsaw Research Centre, Twarda 51/55, 00-818 Warsaw
Bernhard Schulz
Institute of Mineralogy, TU Bergakademie Freiberg, Brennhausgasse 14, D-09596 Freiberg
Axel D Renno
Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden
Monazite from the Stolpen monzogranite (SE Germany) was studied to constrain the Th-U-total Pb age of pluton formation. Monazite grains demonstrate subtle to distinct patchy zoning related to slight compositional variations. Textural and compositional characteristics indicate that the monazite formed in a single magmatic event in a slightly heterogeneous system, and was only weakly affected by secondary alteration, which did not disturb the Th-U-Pb system. Chemical dating of the monazite gave a consistent age of 299 ± 1.7 Ma. The current study presents the first geochronological data for the Stolpen granite. It provides evidence that Stolpen is the youngest Variscan granitic intrusion in the Lusatian Granodiorite Complex and indicates that magmatic activity related to post-collisional extension in this region lasted at least 5my longer than previously assumed.
