New inorganic and organic geochemical data from thucholite in the Upper Permian (Wuchiapingian) Kupferschiefer (T1) shale collected at the Polkowice-Sieroszowice Cu-Ag mine in Poland are presented. Thucholite, which forms spherical or granular clusters, appears scattered in the T1 dolomitic shale at the oxic-anoxic boundary occurring within the same shale member. The composition of thucholite concretions and the T1 shale differs by a higher content of U- and REE-enriched mineral phases within the thucholite concretions compared to the T1 shale, suggesting a different mineralising history. The differences also comprise higher N_tot, C_tot, H_tot, S_tot contents and higher C/N, C/S ratios in thucholite than in the T1 shale. The hydrocarbon composition of the thucholite and the surrounding T1 shale also varies. Both are dominated by polycyclic aromatic compounds and their phenyl derivatives. However, higher abundances of unsubstituted polycyclic aromatic hydrocarbons in the thucholite are indicative of its pyrogenic origin. Pyrolytic compounds such as benz[a]anthracene or benzo[a]pyrene are more typical of the thucholite than the T1 shale. Microscopic observations of the thucholite and its molecular composition suggest that it represents well-rounded small charcoal fragments. These charcoals were formed during low-temperature combustion, as confirmed by semifusinite reflectance values, indicating surface fire temperatures of about 400 °C, and the absence of the high-temperature pyrogenic polycyclic aromatic hydrocarbons. Charred detrital particles, likely the main source of insoluble organic matter in the thucholite, migrated to the sedimentary basin in the form of spherical carbonaceous particulates, which adsorbed uranium and REE in particular, which would further explain their different contents and sorption properties in the depositional environment. Finally, the difference in mineral content between thucholite and the T1 shale could also have been caused by microbes, which might have formed biofilms on mineral particles, and caused a change in the original mineral composition.

介绍了在波兰 Polkowice-Sieroszowice 铜银矿收集的上二叠统（Wuchiapingian）Kupferschiefer (T1) 页岩中的土纹石的新无机和有机地球化学数据。斑铜矿形成球形或粒状簇，散布在同一页岩层内含氧-缺氧边界处的 T1 白云质页岩中。与 T1 页岩相比，图蒙结核结核和 T1 页岩的组成不同，其富含 U 和 REE 的矿物相含量较高，这表明不同的矿化历史。差异还包括较高的 N _tot 、C _tot 、H _tot 、S _tot 含量以及较高的 C/N、C/S土铜矿中的比率高于 T1 页岩中的比率。斑纹岩和周围 T1 页岩的碳氢化合物成分也有所不同。两者均以多环芳香族化合物及其苯基衍生物为主。然而，斑纹石中较高丰度的未取代多环芳烃表明其热成起源。与 T1 页岩相比，斑纹石中更常见的是苯并[a]蒽或苯并[a]芘等热解化合物。对斑纹石及其分子组成的显微镜观察表明，它代表了圆形的小木炭碎片。这些木炭是在低温燃烧过程中形成的，经半熔岩反射率值证实，表明表面火灾温度约为 400 °C，并且不存在高温热解多环芳烃。 烧焦的碎屑颗粒可能是斑纹岩中不溶性有机质的主要来源，以球形碳质颗粒的形式迁移到沉积盆地，特别是吸附铀和稀土元素，这将进一步解释它们在沉积过程中的不同含量和吸附特性。环境。最后，斑纹石和T1页岩之间矿物含量的差异也可能是由微生物引起的，微生物可能在矿物颗粒上形成生物膜，并导致原始矿物成分的变化。