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Figure F4. A. Relationship between the C₁/C₂₊ ratios and δ¹³C_CH4 values (modified from Bernard et al., 1978). B. δ¹³C_CH4 versus δD_CH4 (adapted from Whiticar, 1999). C. δ¹³C_CH4 versus δ¹³C_CO2 (adapted from Whiticar, 1999; Pohlman et al., 2009; Kim et al., 2012) in void gas at Sites U1412 and U1413.

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