Figure 7

Cumulative and instantaneous carbon isotopes of generated ethane (δ13C2) versus EASY%Ro for keogens Wuerhe (a,b) and Fengcheng (c,d). Instantaneous carbon isotopes were calculated within a maturity interval of EASY%Ro 0.10.

Cumulative and instantaneous carbon isotopes of generated ethane (δ13C2) versus EASY%Ro for keogens Wuerhe (a,b) and Fengcheng (c,d). Instantaneous carbon isotopes were calculated within a maturity interval of EASY%Ro 0.10.