Figure F2. Site 1147 and 1148 downhole variations in carbon preference index (CPI), odd-over-even (OEP) prominence, and average chain length (ACL) of n-alkanes. CPI = [(C25–33(odd)/C24–32(even)) + (C25–33(odd)/C26–34(even))]/2; OEP = [C27 + 6(C29 + C31)]/(4 x C28+4 x C30); ACL = (Ci x i)/ Ci, where i ranges from 23 to 33 for n-alkanes.

Figure F2. Site 1147 and 1148 downhole variations in carbon preference index (CPI), odd-over-even (OEP) prominence, and average chain length (ACL) of n-alkanes. CPI = [(C_25–33(odd)/C_{24–32(even)}) + (C_25–33(odd)/C_{26–34(even)})]/2; OEP = [C₂₇ + 6(C₂₉ + C₃₁)]/(4 x C₂₈+4 x C₃₀); ACL = (C_ix i)/ C_i, where i ranges from 23 to 33 for n-alkanes.