Cechsztyńska mineralizacja kruszcowa okolic Wrocławia
Abstract
ZECHSTEIN ORE MINERALIZATION IN THE VICINITIES OF WROCŁAW
Summary
The paper presents results of petrographic and mineralogical studies on Zechstein profile in the Wrocław area (eastern Fore-Sudetic Monocline) and detailed analysis of the Zechstein Limestone. It appeared impossible to find any positive correlation between diversity in polimetalic mineralization and variations in degree of dolomitization of Zechstein Limestone dolomites. Two stages of ore mineralization in the lower parts of Werra have been distinguished: an early diagenetic stage and that of secondary mineral remobilization (late diagenesis). The latter can be observed throughout a much longer sequence of the Zechstein Limestone horizon than the former. It has been found that in this second stage minerals of zinc and lead are mainly present. Both the form and the diversity of ore mineral occurrence indicate that the dolomites had been mineralized mainly due to postsedimentary migration of fluids rich in heavy metal ions. In the studied material, there has been found no evidence to confirm Davidson's hypothesis of origin of Permian strata-bound copper ores in central Europe.
Summary
The paper presents results of petrographic and mineralogical studies on Zechstein profile in the Wrocław area (eastern Fore-Sudetic Monocline) and detailed analysis of the Zechstein Limestone. It appeared impossible to find any positive correlation between diversity in polimetalic mineralization and variations in degree of dolomitization of Zechstein Limestone dolomites. Two stages of ore mineralization in the lower parts of Werra have been distinguished: an early diagenetic stage and that of secondary mineral remobilization (late diagenesis). The latter can be observed throughout a much longer sequence of the Zechstein Limestone horizon than the former. It has been found that in this second stage minerals of zinc and lead are mainly present. Both the form and the diversity of ore mineral occurrence indicate that the dolomites had been mineralized mainly due to postsedimentary migration of fluids rich in heavy metal ions. In the studied material, there has been found no evidence to confirm Davidson's hypothesis of origin of Permian strata-bound copper ores in central Europe.