diageneshistorik
Diageneshistorik is the study of the diagenetic history of sedimentary rocks, i.e., the sequence of physical, chemical, and biological changes that occur after deposition and before metamorphism. It records when and where processes such as compaction, cementation, dissolution, replacement, and recrystallization happened, and how they altered mineralogy, porosity, and permeability.
Key diagenetic processes include mechanical compaction, which reduces primary porosity; cementation by minerals such as calcite,
Significance: The diageneshistorik controls rock properties important for hydrocarbon systems and groundwater, including porosity, permeability, and
Methods: Researchers study diagenetic history using petrography (thin section), cathodoluminescence, scanning electron microscopy, X-ray diffraction, stable
Examples: Early diagenesis may cement grains in shallow burial; quartz overgrowth reduces porosity in sandstones; carbonate