Wstępna charakterystyka mineralogiczna czarnych łupków antrakozjowych z obszaru synklinorium śródsudeckiego

Abstract

Preliminary mineralogical characteristics of the Anthracosia Shales from the Intra-Sudetic Synclinorium.

A b s t r a c t. Anthracosia Shales within the Pennsylvanian–Lower Permian continental succession from the Intra-Sudetic Synclinorium are lacustrine sediments, represented by black shales intercalated with sandstones/mudstones. Mineral composition of each lithology consists of quartz, feldspar, mica, clay minerals (including kaolinite, the content of which decreases upward the section), and carbonates (calcite and siderite). The section is a continuous record of reduction and rise in terrigenous input. Mineral detritus is least weathered in the uppermost part of the Anthracosia Shales. The sedimenta- tion occurred under dysoxic conditions that were ventilated by bottom currents.