Figure 4.
Overview of methyladamantane index (MAI), ethyladamantane index (EAI), dimethyladamantane index 1 (DMAI-1), dimethyladamantane index 2 (DMAI-2), trimethyladamantane index 1 (TMAI-1), trimethyladamantane index 2 (TMAI-2), methyldiamantane index (MDI), dimethyldiamantane index 1 (DMDI-1), and dimethyldiamantane index 2 (DMDI-2) parameter results versus thermal maturity for all fluids. The y axes are identical in all panels. Solid lines represent linear fits to the data for each regional group, with 95% confidence intervals of the fits in gray shading. EU = Europe; ME = Middle East; NA = North America; = adjusted coefficient of determination; SA = South America; VRE = vitrinite reflectance equivalent.