Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Figure 1

Diagrams showing (a) location of major gas fields, (b) distribution of sediment facies during the Changxing-Feixianguan deposition period, and (c) generalized stratigraphy. Possible source rock and reservoir intervals are marked. (Modified from Hu et al. (2014) [19].)