SEM-based cathodoluminescence studies of several Paleozoic and Mesozoic sandstones of the western U.S. reveal diagenetic features not visible by other methods. Cement textures include both zoned and featureless concentric overgrowths around grains, and nonconcentric cement marked by elongate euhedral crystals, partial euhedral overgrowths and zoned bulbous masses.
Textural evidence provides clues to the role of microfracturing in diagenesis.
Microfractures crosscut some CL zones, but commonly merge with other CL zones. These CL zones are generally centered on the microfracture. Another observation is the development of a thick CL zone continuous with fracture fill but developed only on the side of a pore adjacent to the microfracture. Microfractures should be considered as one factor influencing the development of quartz cement. Microfractures may localize development of quartz cement by providing pathways for silica-bearing fluids.