Lithostratigraphy and geological evolution of Triassic rocks in the Palmyride Basin in Syria

Abstract

The purpose of the research. This research aims to study the lithostratigraphy and geologic evolution of the Kurrachine Dolomite Formation in the middle Triassic along the Palmyrian Belt Zone in Syria. Studying this formation in its northern and southern parts has shown that it consists of two lithostratigraphic members, where each of them includes a series of lithological units. The petrographical study of the components of these units shows that they are composed of four distinguished components: dolomitic limestones, clayey limestones, clay and anhydrites, pure or mixed and deposited in repeated harmonic layers, gathered mostly in neutral sedimentary sequences. The relevance of the research. This scientific research can provide information about the sedimentary evolution and stratigraphic succession of the region and its historical development. In addition, it can provide insight into the relationships between different sedimentary layers, and mineral resources available in the basin and their potential for exploitation. This research can also lead to a better understanding of the ancient environment in the region. Research methodology. Data was collected from a range of sources, including geological maps and cross-sections, drill core log data from nine gas wells in the field, field observations, and published research. The study area was divided into different lithostratigraphic units, and the geology of each was studied in detail. Attention was paid to the lithology, hydrocarbon content, structural features and other features of each unit. The data collected was then used to construct a geological history of the region, including its tectonic, sedimentary, and paleogeographic evolution. This information was then used to make inferences about the regional stratigraphic framework, as well as to make predictions about future geological evolution. Results and conclusions. This article focuses on the lithostratigraphy, as well as the geological evolution, of Triassic rocks, specifically the Kurrachine Dolomite Formation in the Northeastern Palmyride Basin of Syria. Laboratory studies were conducted to explore the lithology and sedimentary facies of the formation. Results show that the Kurrachine Dolomite Formation is dominated by deposits of a limited lithological nature. It is limited to calcareous, limestone, dolomitic limestones, dolomite, shale, and clay rocks, with limited intrusions of anhydrite in the upper part. The sedimentary environment of the formation is interpreted as shallow-marine. All analysis reveals that the Kurrachine Dolomite Formation is mainly composed of Middle Triassic deposits. This indicates a change in the sedimentation dynamics in the Palmyride Basin during the Middle Triassic. The results of the study provide a better understanding of the geological evolution of the Palmyride Basin in Syria.