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 supersaturated 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: Cu_30.86Ag_0.1Fe_0.04S₁₆. 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.

中文翻译：

---

波兰下西里西亚卢宾矿含银金闪石的EMPA，XRD和拉曼光谱表征

辉绿岩族矿物广泛分布在受热液影响的不同岩石，硫化铜矿床的氧化带中，甚至可能是过饱和火山岩中的结晶。一些辉绿岩族矿物构成了主要的铜矿体。Djurleite（铜₃₁ S ₁₆）是球墨铸铁族中罕见的成员，具有非常复杂的结构。该组所有成员之间的物理和化学相似性使他们几乎无法通过宏观和微观方法来识别。在这项研究中，波兰下西里西亚Kupferschiefer矿床中的含银微晶石的特征是EMPA（电子探针分析），XRD（X射线衍射）和拉曼光谱。来自研究地点的金闪石具有以下一般化学通式：Cu _30.86 Ag _0.1 Fe _0.04 S ₁₆。Ag含量最高为0.55重量％，而Fe最高为0.19重量％。钙长石的存在证实了库珀费尔谢弗（Kupferschiefer）中铜-银矿床的低温（〜90°C）水热成因，这与先前的研究一致。此外，这组作者认为，富含银的辉绿岩可能经常被误认为是富含银的辉绿岩，后者曾经是前南洋单斜线矿中铜-银矿床中矿体中主要的含银矿物之一。但是，对这种说法的确认需要更多样本，应该对其进行详细研究。