Petrographic, cathodoluminescence and fluid inclusion studies as provenance indicators of Early Palaeozoic sediments of Rugen, Germany

Microstructural, cathodoluminescence and fluid inclusion studies were carri ed out on detrital quartz grains to support conventional provenance analysi s of Early Palaeozoic elastic sediments of NE Germany (Rugen 5, Loissin 1, G 14-1) and of Bornholm. Considering these investigations, the detrital qua rtz component of Cambrian sedimentary rocks from Bornholm and the G 14 bore hole derived from metamorphic sources from Baltica. The Ordovician turbidit ic greywackes of Rugen contain exclusively magmatic quartz grains of a volc anic source. Silurian, elastic sediments display a combined source area wit h a metamorphic and a volcanic provenance. The input of metamorphic quartz grains shows a heterogeneous basement source area, while the volcanic quart z grains come from a homogeneous source. The Silurian sediments of G 14-1 d emonstrate the closing of the Tornquist Ocean and mixing of both detritus p rovenances. For the stratigraphically undated Loissin sandstones we suppose a source area, which is comparable to the Cambrian source area of the sout hern Baltica, but contains an additional felsic, magmatic detrital componen t. Moreover, all samples reflect a younger, hydrothermal. fluid event.