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The Turpan-Harmi (abbreviated to Tuha below) Basin is a typical basin of coal-generated oil accumulation in China. The Middle-Lower Jurassic coal measures are considered the main source beds. Hence, both desmocollinite and suberinite are considered the contributors for coal-generated oil. Principal geochemical features of the crude oil in the Tuha Basin are rich in alkanes (70%-80%), high pristane/phytane ratio (6-8), abundant heavy carbon isotope (δ13C PDB= - 26‰-23‰ ) and absolute C29 sterane predominance. The hydrocarbon generation process from the coal series is characterized by multistages, early generation and early expulsion.
The Turpan-Harmi (abbreviated to Tuha below) Basin is a typical basin of coal-generated oil accumulation in China. Therefore, both desmocollinite and suberinite are considered the contributors for coal -generated oil. Principal geochemical features of the crude oil in the Tuha Basin are rich in alkanes (70% -80%), high pristane / phytane ratio (6-8), abundant heavy carbon isotope (δ13C PDB = 23 ‰) and absolute C29 sterane predominance. The hydrocarbon generation process from the coal series is characterized by multistages, early generation and early expulsion.