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Abstract

It cannot be expected that all observations made on stratiform lead-zinc deposits should point entirely to one genetic pattern. In this case, there would be no problem to discuss. But if we find features which can only be explained by syngenesis, or even better by genesis synchronous with the host rock, we can assume that the ores must, at least partly, have originated contemporaneously with the surrounding rock.

After the first appearance of the stimulating publications (8, 12, 17), asserting a syngenetic-sedimentary origin of the lead-zinc deposits in the Northern Limestone Alps instead of the generally accepted epigenetic-telethermal theory, agitated opposition arose among most Austrian geologists. Several symposia took place as a result (Munich 1956, Bleiberg 1959, Mezica 1964). The second of the present authors advocated an epigenetic mineralization at the conference in Munich. But since that time detailed and critical investigations were extended to the Southern Limestone Alps and particularly to the ore district of Bleiberg-Kreuth.

O. Schulz (14) found evidence of syngenetic-sedimentary ore structures in a few places in Kreuth. The first of the present authors (5) paid special attention to the comparison of the numerous lead-zinc deposits in the Austrian Limestone Alps with regard to their stratigraphic position and their morphological features.

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