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

Table 6

Quantitative calculation of the paleo-productivity of Chang 7³ and Chang 8 intervals from well DP1 in the western Ordos Basin. The parameters of porosity and proportion of aquatic organisms derived from Wang [16] and the sedimentation rate refers to Chen et al. [19].

Member	Depth (m)	Density (g/cm^3)	TOC (%)	Porosity (%)	Sedimentation rate (cm/1000a)	Proportion of aquatic organisms	Paleo-productivity (g/m^2·a)
Chang 7^3	2743.96	2.47	5.25	0.42	1.30	0.73	1691.45
	2744.57	2.53	4.50	0.42	1.30	0.73	1484.83
	2745.24	2.44	6.02	0.42	1.30	0.73	1913.04
	2747.34	2.33	7.34	0.42	1.30	0.73	2228.60
	2747.22	2.35	9.21	0.42	1.30	0.73	2814.06
	2751.96	2.42	9.99	0.42	1.30	0.73	3141.62
	2756.18	2.49	4.31	0.42	1.30	0.73	1399.20
	2750.97	2.53	7.27	0.42	1.30	0.73	2395.97
	2757.09	2.49	5.24	0.42	1.30	0.73	1699.65
	2759.98	2.44	6.14	0.42	1.30	0.73	1950.09
	2762.68	2.81	7.40	0.42	1.30	0.73	2709.35
	2766.89	2.51	6.27	0.42	1.30	0.73	2045.85
	2767.92	2.49	5.61	0.42	1.30	0.73	1816.81
	2768.99	2.47	4.03	0.42	1.30	0.73	1295.69
	2770.86	2.47	5.02	0.42	1.30	0.73	1612.25
	2771.96	2.48	6.30	0.42	1.30	0.73	2031.24
	2773.01	2.45	6.69	0.42	1.30	0.73	2134.19
	2776.83	2.47	5.77	0.42	1.30	0.73	1855.19
	2777.59	2.41	2.61	0.42	1.30	0.73	818.98
Chang 8	2778.18	2.58	0.63	0.42	1.30	0.73	211.98
	2778.67	2.64	0.53	0.42	1.30	0.73	182.23
	2779.34	2.63	0.59	0.42	1.30	0.73	202.35
	2781.10	2.67	0.80	0.42	1.30	0.73	277.58
	2781.57	2.64	0.50	0.42	1.30	0.73	172.16
	2784.03	2.68	1.47	0.42	1.30	0.73	513.33