Geochemical Characteristics and Origins of the Crude Oil of Triassic Yanchang Formation in Southwestern Yishan Slope, Ordos Basin

Figure 5

Distribution triangular chart of different carbon number regular Steranes of crude oil and source rock samples in Southwestern of Yishan Slope. (a-plankton; b-alga; c-terrestrial plant; d-dominated by phytoplankton; e-dominated by alga; f-dominated by terrestrial plant; g-mixed source).