In the Kreibitz-Zittau area at the northern margin of the Bohemian Massif (Czech-German border region), a ca. 1.000-m-thick Cenomanian to Mid-Coniacian succession of multi-recycled quartz arenites with high compositional but low textural maturity is exposed. In the northern Bohemian Cretaceous Basin, translucent heavy minerals (tHM) are nearly exclusively composed of zircon (Z), tourmaline (T) and rutile (R) with an average ZTR maturity index of 91. Tourmaline is most common and dominates the tHM spectrum with an average of 60 %. Zr-in-rutile temperatures document the upper amphibolite-eclogite to granulite facies with two peaks at 700–760°C and 800–930°C. Cr/Nb discrimination of rutile and Fe-Mg-Al geochemistry of tourmaline unambiguously indicate a more than 95 % dominance of Al-rich and Fe-Mg-poor metapelites. Garnet grains are scarce, but the majority belongs to the almandine-pyrope series. Pb/U-ages of detrital rutile show a distinct peak between ca. 320–330 Ma, less than 5 % have older ages of ca. 570–600 Ma. The 95 % predominance of Variscan ages in all Upper Cretaceous samples and the high temperatures of metamorphism excluded the Neoproterozoic greywackes and granitoids of the eastern Lusatian Massif as well as the granitoids of the Jizera–Krkonoše Massif in the north to northeast of the depositional area as supposed source. Parent rocks were abyssal low-pressure granulites in the high-grade metamorphic gneiss / migmatitic Góry Sowie Massif, ca. 100 km to the east of the depositional area, which was uplifted and eroded during Late Devonian / Early Carboniferous times (Aramowicz et al. 2006).