Formation of Diagenetic Minerals in the Carboniferous Rock Complex from the Fore-Sudetic Monocline (SW Poland): Fluid Inclusion, Isotopic and Raman Constraints

The paper presents the latest state of knowledge on clastic sedimentary rocks from Carboniferous complex in SW part Polish Lowlands, studied to help determine their potential prospectivity for occurrence oil and/or gas deposits. Rocks were analyzed with respect petrographic-mineralogical characteristics deposits, diagenesis, determinations pressure-temperature conditions mineral formation and hydrocarbon occurrence. Analyses carried out samples four selected boreholes Fore-Sudetic Monocline. After microscopic analysis minerals thin sections, following techniques used: luminescence (UV, blue light), microthermometric fluid inclusions double-sided polished wafers, XRD analyses, stable isotopic analyses (carbon, oxygen) calcite dolomite-ankerite Raman spectra inclusions. Orthochemical components, such as carbonates authigenic quartz, that form cements or fill veins cutting sample material have been studied. Fluid inclusion data quartz result homogenization temperatures 74–233 °C. gives temperature estimations organic matter about 164 °C 197 °C, depending borehole, which points a low coalification degree. post-sedimentary processes compaction, cementation diagenetic dissolution under eo- meso-diagenetic over 160 influenced present character P-T brines methane trapping estimated be ~850–920 bars 185–210 (vein calcite) ~1140 220 (Fe-dolomite/ankerite). However, locally, might higher (>200 °C), may symptom local regional metamorphism very