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- W2187805501 abstract "Summary Porphyrins and perylene biomarkers have attracted considerable attention as important constituents of source rocks and crude oils, in recent years. These biomarkers provide significant information on depositional environments, origin, and maturity of the oils in petroliferous basins. During present studies, both porphyrins and perylene pigments in oils from different structures and sediment samples belonging to Cambay Shale Formation from age Late -Early Eocene of North Cambay basin were analysed and quantified. The results indicate that distribution and preservation of both petroporphyrins and perylene pigments are mainly controlled by the redox conditions experienced by different sub units of the Cambay Shale Formation. The anoxic events identified by the distribution of these pigments during Early to Late Eocene times can be correlated with the sea level changes, which occurred during this period. The abundance of vanadyl porphyrins and perylene in the Younger Cambay Shale sequences suggests that high anoxic condition with low pH during deposition. On the contrary the enrichment of nickel porphyrins in Older Cambay Shale sediments indicate suboxic conditions with high pH and Eh. Furthermore, the enrichment of etioporphyrin (ETIO) series of nickel porphyrins with vanadyl porphyrins as well as low concentrations of vanadium in the oils of North Cambay basin suggests that these oils are mainly derived from the Older Cambay Shale (OCS) and Olpad Formation deposited under suboxic conditions." @default.
- W2187805501 created "2016-06-24" @default.
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- W2187805501 date "2006-01-01" @default.
- W2187805501 modified "2023-09-27" @default.
- W2187805501 title "The Geochemical Composition of Oils and Sediments From Ahmedabad-Mehsana Block of North Cambay Basin, India" @default.
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