Genesis and Accumulation Mechanism of Low-Rank CBM: A Case Study in the Jiergalangtu Block of Erlian Basin, Northern China.

42 Due to the preferential consumption of 12 C(CO 2 ) by microbial methanogenic bacteria in the process of secondary biogas generation and the differential dissolution of groundwater, the consumption of CO 2 dissolution in a shallower than 450 m burial was higher, and the CO 2 content and 13 C(CO 2 ) in a deeper than 450 m burial were greatly affected by isotope fractionation and microbial secondary transformation, showing a decreasing trend.

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