The Application of Glauconite for High-Resolution Stratigraphic Interpretations of Eocene Succession

This study explores the potential of glauconite for a high-resolution interpretation of Eocene stratigraphic sequences for the correlation of hydrocarbon reservoirs. The authigenic glauconite forms abundantly during the Eocene in shallow marine environments, and its presence indicates a low rate of sediment supply. Glauconite is characteristically associated with transgressive deposits, and its presence reflects marine flooding. The presence of glauconite marks the different orders of marine flooding surfaces in stratigraphic sequences because of the requirement of a low rate of sediment. The glauconitic intervals provide high-resolution sequence stratigraphic interpretations in Kutch, Cambay and Jaisalmer Basins in the onshore basins of western India and in the subsurface Assam-Arakan Basin in northeast India. Because of its highly radioactive nature, the glauconitic rock is useful for subsurface correlation using electrologs.