Table 1.

Select lipid biomarker ratios for thermal maturity, source biota, and depositional environmental assessments

^aHop/Ster is the ratio of major (C₂₇–C₃₅ hopane isomers)/(C₂₇–C₃₀ diasteranes and regular steranes)

^bC₃₁ 2-methylhopane index (2-MeH index) calculated as [(C₃₁ 2α-methylhopane+C₃₁ 2β-methylhopane)/(C₃₁ 2α-methylhopane+C₃₁ 2β-methylhopane+C₃₀ αβ hopane)*100]

^cC₃₁ 3-methylhopane index (3-MeH index) calculated as [(C₃₁ 3β-methylhopane)/(C₃₁ 3β-methylhopane+C₃₀ αβ hopane)*100]

^dRelative percent of C_n steranes to total C₂₇–C₃₀ steranes

^e24-isopropylcholestane abbreviated as C₃₀ ipc

^f24-n-propylcholestane abbreviated as C₃₀ npc

^gNot detected (n.d.) indicates that the peaks were below MRM–GC–MS detection limits due to negligible abundance