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Abstract This study documents the effects of igneous dike intrusion on organic geochemical parameters of a shallow-marine originated, Late Jurassic black shale (av. TOC = 2.2 wt%) in the Kutch rift basin in… Click to show full abstract
Abstract This study documents the effects of igneous dike intrusion on organic geochemical parameters of a shallow-marine originated, Late Jurassic black shale (av. TOC = 2.2 wt%) in the Kutch rift basin in western India. The dike intrusion forms extremely to mildly altered, meter-scale zones around them. The primary wrinkled micro-texture of the shale is lost completely, and organic matter is charcoalized in the extremely altered zone recording a Rock-Eval Tmax > 458 °C. Immature type-III kerogen dominating the unaltered shale records abundant coniferal biomarkers such as retene, ent-beyerane, phyllocladane, ent-kaurane, abietane, labdane and norisopimarane, besides n-alkanes, hopanes and steranes. The transition from the unaltered (Rock-Eval Tmax
Journal Title: International Journal of Coal Geology
Year Published: 2017
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