作者: Zhonghong Chen , Qing Liu , Shouchun Zhang , Chunxue Jiang
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摘要: The organic matter distribution and hydrocarbon generation potential as well element distribution in the lacustrine mudstones of lower Member 3 Paleogene Shahejie Formation Dongying depression, eastern China were investigated using methods Rock-Eval pyrolysis, inductively coupled plasma emission spectrometer. results show that most samples are high-quality source rocks with high TOC and S2, and oil shale excellent source rocks and S2 greater than 5.0% 20.0 mg/g, respectively. A freshwater depositional environment in deep lake for was indicated by values biomarker ratios gammacerane/C30 Hopane C35Hopane/C34 Hopane. With lacustrine regression, ratios Ca/U, Ca/Ba, Ca/Mg, Ca/B, Ca/Li, Ca/Sr Sr/Ba decrease, while Fe/(Ca + Mg) increases. In section 3330 - 3370 m with enrichment shale, matter inorganic elements present strong fluctuation. quantitative relations among U, U/Th TOC, S2, %Ca divided into two parts at boundary 7.0%, 32 mg/g 11% TOC, S2 and %Ca, respectively.