Abstract

Using well-established but herein modified luminescence petrographic techniques, secondary quartz can be distinguished from primary quartz in sandstones. Solution and overgrowth phenomena can be distinguished. Luminescence not only prevents ambiguity regarding mechanisms but reveals the detrital fabric so that size, shape, and degree of rounding can be seen. Features relating to prior cycles can also be detected. Fractures and crushing events, long since healed, are distinguishable by the technique. Crenulated boundaries also form in the fracturing-healing-recrystallization process resulting in polycrystalline grains showing metamorphic quartzite texture. It is suggested that many of the polycrystalline quartz grains found in sandstones originate in this way either in place or in precursor source rocks.

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