Sedimentological, Diagenetic, and Sequence Stratigraphic Controls on the Shallow to Marginal Marine Carbonates of the Middle Jurassic Samana Suk Formation, North Pakistan

This study presents a thorough analysis of the sedimentology, diagenesis, and sequence stratigraphy Middle Jurassic Samana Suk Formation in Hazara Basin northern Pakistan. Focusing on two sections, namely Mera Rehmat Por Miana, research aims to unravel complex geological processes within formation. The examination microfacies reveals nine distinct depositional textures, ranging from mudstone wackestone, packstone, grainstone, indicating various inner ramp environments such as open marine, lagoon, coastal settings. Petrographic investigations shed light diagenetic processes, including micritization, cementation, dissolution, compaction, neomorphism, dolomitization. Six cementation types are identified, dolomitization patterns vary, providing insights into lagoonal replacement. Sequence stratigraphic uncovers intriguing Formation. high-stand system tract is characterized by mudstones, pelloidal grainstones, dolomitized periods high sea level. In contrast, transgressive displays ooidal packstones, pel-bioclastic representing transgression inundation previously exposed areas. A significant finding impact diagenesis reservoir quality parameters, specifically porosity, permeability. Diagenetic types, have significantly altered pore network, highlighting importance considering assessing hydrocarbon reservoir. provides comprehensive understanding findings contribute our knowledge similar carbonate reservoirs globally, enhancing exploration development resources comparable environments.