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Pyrolytic characteristics of the weathered and unweathered black shale kerogen, obtained during Rock-Eval analysis. (A) Modified Van Krevelen diagram with the correlation of hydrogen (HI) and oxygen (OI) indexes; (B) HI and Tmax crossed-diagram; (C) Correlation of TOC and hydrocarbon potential (S1+S2). The detailed data of Rock-Eval analysis are presented in Table S7. The unweathered black shale is described in detail in Stasiuk et al. (2017).
