Table 4. Geochemical Parameters of All Water Samples^a.

sample ID	Pr/Ph	Pr/C17	Ph/C18	main carbon	CPI	OEP	∑nC21–/∑nC22+	C2920S/(20S+20R)	C29ββ/(ββ+αα)	C27/%	C28/%	C29/%	C19+20 TT/%	C21 TT/%	C23 TT/%
DFS-45	0.33	0.38	0.52	C20	0.95	0.97	1.34	0.32	0.45	53.11	26.18	20.71	62.92	16.85	20.22
DFS-69	0.31	0.39	0.57	C20	0.78	0.93	1.63	0.54	0.47	45.17	27.28	27.56	64.88	16.58	18.53
DFS-128	0.38	0.39	0.57	C20	0.74	0.95	1.63	0.44	0.65	49.13	28.67	22.20	69.25	14.25	16.50
DFS-133	0.27	0.36	0.54	C20	0.74	0.91	1.62	0.50	0.43	41.68	28.99	29.32	61.06	18.39	20.55
DFS-148	0.19	0.38	0.56	C20	0.73	0.93	1.51	0.49	0.59	34.40	32.51	33.09	63.73	14.29	21.98
DFS-M68	0.30	0.38	0.52	C20	1.09	0.97	1.35	0.45	0.42	35.74	32.72	31.54	63.69	18.45	17.86

^a∑nC₂₁^–/∑nC₂₂⁺indicates (C_min + ··· + C₂₁)/(C₂₁ + ··· + C_max), CPI = {(C₂₅ + C₂₇ + C₂₉ + C₃₁ + C₃₃)[1/(C₂₄ + C₂₆ + C₂₈ + C₃₀ + C₃₂) + 1/(C₂₆ + C₂₈ + C₃₀ + C₃₂ + C₃₄)/2}, OEP = [(C_i + 6C_i+2 + C_i+4)/4(C_i+1 + C_i+3)]^mi+1C₂₉20S/(20S+20R) = C₂₉ααα20S/(C₂₉ααα20R + C₂₉ααα20S). C₂₉ββ/(ββ+αα) = C₂₉αββ20R/(C₂₉αββ20R + C₂₉ααα20R). C₂₇% = C₂₇/(C₂₇ + C₂₈ + C₂₉), C₂₈% = C₂₈/(C₂₇ + C₂₈ + C₂₉), C₂₉% = C₂₉/(C₂₇ + C₂₈ + C₂₉), C₁₉+₂₀TT% = C₁₉+₂₀TT/(C₁₉+₂₀TT + C₂₁TT + C₂₃TT), C₂₁TT% = C₂₁TT/(C₁₉+₂₀TT + C₂₁TT + C₂₃TT), C₂₃TT% = C₂₃TT/(C₁₉+₂₀TT + C₂₁TT + C₂₃TT).