Extremely High Primary Productivity and Organic Matter Enrichment in Lacustrine Sediments: Late Triassic Chang 7³ Sub-Member, Western Ordos Basin

Table 1

Rock-Eval pyrolysis data of Chang 7³ and Chang 8 intervals from well DP1 in the western Ordos Basin.

Member	Depth (m)	(°C)	S1 (mg/g)	S2 (mg/g)	(mg/g)	HI index	OSI
Chang 7^3	2743.08	452.00	2.94	9.92	12.86	250.51	74.24
	2743.87	449.00	3.26	14.24	17.50	303.62	69.51
	2743.96	445.00	2.43	16.06	18.49	305.90	46.29
	2743.97	452.00	5.01	22.41	27.42	332.49	74.33
	2744.20	442.00	1.98	15.15	17.13	298.82	39.05
	2744.57	440.00	2.30	11.81	14.11	262.44	51.11
	2744.85	451.00	4.27	18.58	22.86	281.52	64.70
	2745.24	445.00	2.13	17.63	19.76	292.86	35.38
	2745.33	448.00	4.23	21.39	25.62	322.62	63.80
	2745.74	428.00	2.49	7.36	9.85	277.74	93.96
	2745.96	439.00	3.04	9.78	12.82	247.59	76.96
	2746.42	449.00	5.49	26.65	32.14	331.47	68.28
	2746.87	444.00	3.46	11.37	14.82	156.83	47.72
	2747.22	445.00	6.79	39.42	46.21	428.01	73.72
	2749.16	448.00	6.10	35.86	41.96	426.90	72.62
	2749.57	446.00	4.71	30.83	35.54	296.44	45.29
	2750.18	452.00	5.51	32.57	38.08	381.83	64.60
	2750.64	451.00	4.80	29.40	34.21	326.67	53.33
	2750.97	444.00	5.28	29.84	35.13	410.45	72.63
	2752.14	447.00	4.64	20.57	25.21	478.37	107.91
	2752.50	449.00	2.19	9.03	11.22	244.72	59.35
	2753.91	450.00	3.38	16.61	19.99	270.52	55.05
	2754.34	452.00	3.18	17.80	20.98	297.16	53.09
	2754.71	453.00	4.64	29.09	33.73	358.25	57.14
	2755.20	451.00	3.63	13.69	17.32	277.13	73.48
	2755.67	451.00	4.79	21.20	25.99	345.84	78.14
	2756.18	451.00	3.34	14.81	18.16	296.20	66.80
	2756.52	434.00	2.72	13.97	16.69	252.17	49.10
	2757.04	443.00	4.85	19.36	24.21	369.47	92.56
	2761.17	441.00	1.93	13.05	14.98	198.63	29.38
	2761.58	450.00	3.87	18.11	21.99	269.49	57.59
	2764.21	452.00	1.42	21.27	22.69	331.31	22.12
	2765.03	453.00	6.12	36.48	42.60	344.15	57.74
	2765.51	448.00	4.43	30.92	35.35	332.83	47.69
	2765.89	442.00	3.78	27.08	30.86	409.06	57.10
	2766.76	448.00	2.64	19.39	22.03	375.78	51.16
	2767.10	445.00	3.06	21.47	24.52	376.01	53.59
	2768.99	444.00	1.47	12.24	13.71	303.72	36.48
	2769.27	440.00	2.00	13.09	15.09	293.17	44.79
	2770.13	446.00	2.61	13.84	16.45	255.82	48.24
	2770.27	440.00	3.02	18.95	21.97	308.63	49.19
	2770.68	440.00	4.76	27.12	31.87	519.54	91.19
	2770.86	442.00	1.98	14.09	16.07	280.68	39.44
	2771.38	440.00	3.38	21.56	24.94	318.93	50.00
	2771.96	445.00	2.09	12.43	14.53	244.69	41.14
	2772.86	446.00	2.06	20.62	22.68	369.87	36.95
	2773.01	449.00	3.39	17.13	20.52	256.25	50.71
	2773.93	449.00	2.78	21.15	23.94	322.41	42.38
	2774.63	437.00	2.30	28.19	30.49	422.01	34.43
	2775.07	443.00	2.09	21.01	23.10	260.19	25.88
	2776.48	439.00	2.90	26.99	29.89	392.30	42.15
	2776.89	442.00	2.78	21.98	24.76	374.45	47.36
	2777.59	438.00	0.89	12.93	13.83	495.40	34.10
Chang 8	2778.18	452.00	0.25	1.26	1.51	200.96	39.87
	2779.34	455.00	0.28	1.18	1.46	200.68	47.62
	2781.10	446.00	0.36	1.43	1.79	177.97	48.30
	2781.57	457.00	0.38	1.18	1.55	234.83	103.07
	2782.18	450.00	1.50	24.87	26.37	271.80	53.83
	2784.03	447.00	0.71	2.57	3.29	174.83	107.91
	2784.25	435.00	0.84	2.92	3.76	358.28	2.95