Light Hydrocarbon Geochemistry: Insight into Mississippian Crude Oil Sources from the Anadarko Basin, Oklahoma, USA

Table 3

Key biomarker and diamondoid ratios sensitive to organic matter type and source rock lithology.

Sample ID	RegC27/RegC29	DiaC29/RegC29	Hop/RegC29	ETT/HH	C23TT/Hop	4,8-DMD	3,4-DMD	4,9-DMD
Group 1
Alf-1	0.38	0.64	0.41	0.03	0.12	36.5	41.9	21.6
Alf-2	0.42	0.58	0.57	0.12	0.02	33.8	44.4	21.9
Woo-1	0.31	0.61	0.35	0.01	0.05	32.7	42.9	24.4
Woo-2-	033	0.57	0.41	0.14	0.17	30.4	47.3	22.3
Kay-1	0.45	0.70	0.40	0.12	0.10	28.1	46.6	25.3
Group 2
Lin-1	0.68	0.81	0.78	0.82	0.74	43.1	40.0	16.9
Lin-2	0.77	0.74	0.71	0.78	0.70	41.8	38.9	19.3
Log-1	0.74	0.70	0.66	0.69	0.65	41.5	34.6	23.8
Log-2	0.65	0.62	0.58	0.85	0.58	44.0	33.2	22.8
Pay-1	0.87	0.34	0.87	0.61	0.77	46.0	34.7	19.3
Pay-2	0.90	0.85	0.73	0.57	0.81	47.1	28.2	24.7
Group 3
Can-1	0.59	0.77	0.68	0.31	0.75	43.2	41.4	15.3
Can-2	0.66	0.54	0.41	0.41	0.65	39.4	42.4	18.3
Kin-1	0.45	0.58	0.70	0.78	0.87	38.3	40.4	21.3
Kin-2	0.66	0.41	0.51	0.18	0.25	40.1	37.6	22.4
Bla-1	0.87	0.79	0.55	0.74	0.45	38.8	37.0	24.2

RegC₂₉/RegC₂₇: ααR C₂₇ sterane/ααR C₂₉ sterane; DiaC₂₉/RegC₂₉: C₂₉ 13β 17α 20R diasterane/C₂₉ 13β 17α dia 20R+ ααR C₂₉ steranes; Hop/RegC₂₉: C₂₉ 17α hopane/C₂₉ 17α hopane + C₂₉αα 20R stigmastane; ETT/HH: sum of extended tricyclic terpanes C₃₀ to C₃₉/sum of extended tricyclic and C₃₀ 17α hopane; C23TT/Hop : C₂₃ tricyclic terpane/C₂₃ tricyclic terpane + C₃₀ 17α hopane; 4,9-DMD: 4,9-dimethyldiamantane/(sum of 4,8-+4,9-+3,4-dimethyldiamantanes); 4,8-DMD: 4,8-dimethyldiamantane/(sum of 4,8-+4,9-+3,4-dimethyldiamantanes); 3,4-DMD: 3,4-dimethyldiamantane/(sum of 4,8-+4,9-+3,4-dimethyldiamantanes).