This study investigates the hydrocarbon generation potential, kerogen quality, thermal maturity and depositional environment of Middle – Upper Jurassic sedimentary rocks in the Blue Nile Basin, Ethiopia, using organic petrography, Rock‐Eval pyrolysis and molecular organic geochemistry. Thirty‐seven outcrop samples were analysed for their total organic carbon (TOC) and inorganic carbon (TIC) contents. The samples came from a Toarcian – Bathonian transitional glauconitic shale‐mudstone unit, the overlying Upper Bathonian Gohatsion Formation, and the Lower Callovian – Upper Tithonian Antalo Limestone Formation. Thirteen samples with sufficient TOC contents for further analysis of the organic matter, eight from the Antalo Limestone Formation and five from the glauconitic shale‐mudstone unit, were selected and analysed using Rock‐Eval pyrolysis. Vitrinite reflectance (VR_r) was measured on random particles, and qualitative maceral analysis was performed under normal incident and UV light. Nine samples were selected for molecular organic‐geochemical analyses. All the samples originating from the Gohatsion Formation showed TOC values which were too low for further analyses of the organic matter.

中文翻译：

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埃塞俄比亚蓝尼勒盆地中侏罗统上侏罗统沉积岩的源岩潜力和沉积环境

这项研究使用有机岩相学，岩石评估热解和分子有机地球化学方法研究了埃塞俄比亚青尼罗河盆地中上侏罗统沉积岩的生烃潜力，干酪根质量，热成熟度和沉积环境。分析了37个露头样品的总有机碳（TOC）和无机碳（TIC）含量。样品来自Toarcian-Bathonian过渡古生冈页岩-泥岩单元，上层的Bathotian Gohatsion组，下层的Callovian-Tithonian上层安塔洛石灰岩组。使用Rock-Eval热解法选择了13个样品，其TOC含量足以进一步分析有机物，其中8个样品来自安塔洛石灰岩地层，另外5个样品来自青釉质页岩-泥岩单元。_r）在随机颗粒上进行测量，并在垂直入射和紫外光下进行定性的显微分析。选择了九个样品进行分子有机地球化学分析。来自Gohatsion组的所有样品的TOC值都太低，无法进一步分析有机物。