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Heterogeneity of organic matter occurrence in laminated shale and its influence on oil generation during thermal maturation: Insights from gold-tube pyrolysis of the Chang 7 Member, Ordos Basin
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DOI：10.1016/j.jaap.2026.108006.png)
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Abstract
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• OM occurrence forms and their evolution paths in the laminated shale were studied. • The O-PTIR-derived structural parameters differ between OM-rich laminae and detrital laminae. • The mineral-bound OM in the detrital laminae exhibits an earlier and shorter period in oil generation compared to the OM-rich laminae. • The conversion efficiencies of Botryococcus and Chrysophyceae cyst fossils-associated OM approximate 100% for both.
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