This Kupferschiefer deposit, like its German counterpart, overlies the Permian Rotliegendes (300 m), and occurs in the shaly basal zone of the Zechstein carbonate-evaporite sequence. Ore minerals show vertical and lateral zoning. Chalcocite is the predominant ore mineral; chalcopyrite may dominate at the base of the ore zone and to east, and bornite at the top and to the northeast. Other minerals present include pyrite, galena, sphalerite, silver, stromeyerite, bismuthinite, molybdenite, and powellite. The thickness of the ore zone is variable. The solubilities of the various minerals under various Eh-pH conditions suggest that the main deposit represents a syngenetic concentration that was differentiated during diagenesis. Copper in the underlying sandstone (Sanderz) is believed to represent epigenetic impregnations from above.

First Page Preview

First page PDF preview
You do not currently have access to this article.