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Title: EMPA, XRD, and Raman characterization of Ag-Bearing Djurleite from the Lubin mine, Lower Silesia, Poland
Authors: Szopa, Krzysztof
Krzykawski, Tomasz
Banasik, Kamila
Król, Piotr
Skreczko, Sylwia
Andriopoulou Mounteanou, Stefania
Koziarska, Marta
Keywords: djurleite; Lubin; Kupferschiefer; Cu-Ag ore body
Issue Date: 2021
Citation: Materials, Vol. 11, iss. 5 (2021), art. no. 454
Abstract: The chalcocite group minerals are widely distributed among different hydrothermally affected rocks, the oxidized zone of copper sulfide deposits, or may be even crystalline from supersat-urated volcanic gases. Some of the chalcocite group minerals form the main Cu orebodies. Djurleite (Cu31S16) is a rare member of the chalcocite group, with a very complex structure. The physical and chemical similarities between all members of the group make them almost unidentifiable by macroscopic and microscopic methods. In this study, Ag-bearing djurleite from the Kupferschiefer deposits, Lower Silesia, Poland, is characterized by EMPA (Electron Microprobe Analyses), XRD (X-Ray Diffraction), and Raman spectroscopy. Djurleite from the investigated site has the following general, average chemical formula: Cu30.86Ag0.1Fe0.04S16. The Ag content is up to 0.55 wt.%, while Fe is up to 0.19 wt.%. The presence of djurleite confirms a low-temperature (~90 ◦C), hydrothermal origin of the Cu-Ag deposit in Kupferschiefer, which is consistent with previously studies. Moreover, the authors believe that Ag-rich djurleite may often be mistaken for Ag-rich chalcocite, which used to be one of the main Ag-bearing minerals in the orebody from the Cu-Ag deposit in the Fore-Sudetic Monocline. However, the confirmation of such a statement requires more samples, which should be studied in detail.
DOI: 10.3390/min11050454
ISSN: 2075-163X
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