The Exquisite Comparison of Shale Mineralogical-Geochemical Characteristics between Chang 7 Member and Chang 9 Member in Yanchang Formation, Ordos Basin

Table 5

Trace element composition of 60 Yanchang shale samples.

Number	Depth (m)	Member/SM	Li	Be	Sc	V	Cr	Co	Ni	Cu	Zn	Ba	La	Ce	Th	U	Sr	Mo
1	1451.1	C7-2SM	59.6	3.44	17.2	95.9	92.4	21.9	58	57.7	118	962	45.3	76.1	10.8	3.33	281	4.42
2	1452.37	C7-2SM	67.3	2.48	14.3	97.8	105	22	47.5	57	103	973	45.6	79.6	11.3	3.26	281	2.77
3	1454.42	C7-2SM	84.7	2.96	18	113	111	18.9	42.8	55.5	114	963	47.3	87.6	11.3	3.17	334	2.16
4	1455	C7-2SM	69.3	3.04	20.5	107	113	19.6	40.9	66.7	133	1071	46.4	80.8	10.5	3.41	364	2.39
5	1457.04	C7-2SM	74.2	2.49	22.4	114	95	21.3	40.4	56.6	110	930	49.5	89.1	10.7	3.86	396	1.6
6	1139.1	C7-2SM	42.8	3.02	15.2	112	114	23.7	62.4	72.4	144	1207	41.6	75	14.6	3.65	225	1.94
7	1145.2	C7-2SM	18.5	4.04	12.7	72.8	75.6	12.5	25.2	33.2	87.3	701	35.8	66.9	17	4.39	397	3.35
8	1146.16	C7-2SM	24.1	2.79	12.9	81.3	87.3	14.8	31.1	43	89.7	878	37.9	68.6	13.3	4.09	348	2.75
9	1152.35	C7-2SM	58.9	2.23	20.2	101	133	18.8	37.3	50.6	112	968	48.4	91.2	10.8	3.78	352	2.62
10	1155.45	C7-2SM	66.1	2.36	22.1	108	105	27.1	58.7	53.5	115	945	49.5	93.3	11.4	3.79	417	6.01
11	1443.77	C7-2SM	21.2	2.61	17	98.7	81.8	9.62	21.6	40.5	90.4	791	36.8	65.5	12.3	4.18	424	0.927
12	1446.15	C7-2SM	46.3	2.24	19	94	99.2	18.7	37.5	79.2	120	951	42.6	76.1	10.6	5.58	335	3.57
13	1447.28	C7-2SM	62.7	2.22	22.1	107	102	22.1	45.3	67.9	116	1004	50.1	88.9	9.9	5.13	407	2.44
14	1449.49	C7-2SM	43.4	1.93	18	102	93.5	21.8	55.2	54.3	101	934	45.5	84	10.5	3.26	398	19
15	1511.17	C7-2SM	36.5	2.96	22	99.3	86.5	16.8	43.4	140	154	809	42.1	75.9	15.6	7.47	246	6.61
16	1516.86	C7-2SM	57	2.4	18.4	109	102	18.8	44.1	49.3	120	858	46	84.9	12.3	3.1	504	1.59
17	1518.62	C7-2SM	64.7	2.48	20.2	95.1	101	19.4	36.5	51.7	116	1051	47.9	90.4	11.9	4.02	395	1.48
18	1519.55	C7-2SM	75	2.68	18.7	124	117	21.5	53.2	61.9	146	820	42.4	75.3	12.7	4.66	238	5.05
19	1609.95	C7-2SM	78.8	2.72	20.6	109	110	21.4	52	66.5	117	1212	51.7	92	13.8	4.1	330	2.98
20	1613.1	C7-2SM	89	2.75	22.5	116	106	24.5	55.3	60.3	134	988	49.8	89.6	12.3	3.77	430	2.34
21	1620.01	C7-2SM	30.8	1.99	16.5	111	92.9	19.4	38	81.1	113	804	31.8	56.3	9.77	10.1	343	7.55
22	1201.47	C7-2SM	64.8	2.34	22.3	114	107	19.5	41.3	53.3	115	1025	55.5	111	11.7	4.78	434	2.51
23	1203.47	C7-2SM	29.2	2.73	29.4	124	87	24.1	52.8	36.5	86.8	750	34.4	66.2	11.4	4.05	316	1.82
24	1209.42	C7-2SM	53.8	2.4	20.2	107	112	21.5	55.1	76.2	136	949	43.3	79.1	11.4	6.29	347	3.71
25	1210.58	C7-2SM	25.8	2.18	17.5	104	87.7	18.7	38.2	56.2	105	974	36.3	67.4	9.97	4.24	341	1.91
26	1608.98	C7-3SM	14.8	1.55	21	99.8	103	13.5	30.8	76.5	88.4	493	49.1	94.3	7.32	4.87	393	1.16
27	1609.18	C7-3SM	49.7	2.12	14.9	101	86.3	15.9	32.1	61.7	107	742	37.7	70.9	9.68	3.09	309	1.14
28	1611.1	C7-3SM	40.8	2.68	15.8	96	124	17.6	35.7	66.4	112	856	44.9	82.9	10.4	3.58	314	1.96
29	1611.42	C7-3SM	63.3	2.33	16.6	111	109	22.3	46.7	99.6	133	869	42.9	83.8	10.5	4.04	327	2.16
30	1611.46	C7-3SM	49.7	2.22	20.5	128	294	20.9	53.3	98.8	127	763	44	85	9.89	4.07	347	5.49
31	1613.08	C7-3SM	40.8	3.2	15.5	93.7	115	19.2	41	87.1	145	641	46.7	93.9	15.9	6.05	376	1.73
32	1613.68	C7-3SM	42.9	2.78	17.5	112	104	19.4	35.6	91.3	126	668	46.7	85.7	14	4.35	313	1.7
33	1620.38	C7-3SM	33	2.48	14.2	105	109	19.5	42.7	65.3	135	737	42.8	77.4	11.6	2.88	314	1.44
34	1621.45	C7-3SM	17.1	1.14	11.2	79.5	67.2	17.4	24.3	58.3	83	664	48.4	89.9	7.63	2.17	446	1.18
35	1386.54	C7-3SM	33.1	1.75	11.8	66.4	66.3	14.4	28.7	92.6	106	938	41.2	75.7	7.63	3.23	347	1.46
36	1388.2	C7-3SM	50.6	2.1	16.2	123	121	22.2	54.9	102	151	971	43.1	77.5	10.1	3.29	333	2.59
37	1392.02	C7-3SM	36.4	2.63	16.7	99.3	109	15.7	25.6	86.2	113	814	46.2	83.4	11.3	3.11	299	1.58
38	1392.46	C7-3SM	30.4	2.76	17.3	97	78.6	17	36	53.1	96.9	674	47.5	84.6	14.5	3.97	300	1.8
39	1399.05	C7-3SM	45.3	2.73	14.7	98.4	87.9	18	35.5	108	154	805	43.5	81.1	13	5.08	298	2.54
40	1399.37	C7-3SM	39.9	2.06	12.7	96.7	220	16.9	50	108	128	700	33.3	60.7	9.27	4.66	267	7.66
41	1603.35	C9M	36.8	2.39	16.3	86	95.2	18.1	39.5	103	134	906	44.1	75.4	13.1	4.83	289	3.39
42	1603.73	C9M	17.4	3.08	9.78	48.9	44.3	8.86	18.7	28.9	66.3	691	34.7	58.5	14.1	4.4	326	2.47
43	1604.16	C9M	41	2.49	15.3	89.2	101	19	41.5	52.6	115	1379	44	82	10.8	3.21	279	3.26
44	1604.66	C9M	39	2.03	14.3	75.3	80.9	18.2	40.2	55	97.4	919	40.2	73.7	10.1	3.23	240	2.42
45	1597.2	C9M	37.6	2.49	16.5	92.8	98.2	18.3	43.9	45.9	112	710	38.2	67.6	14.5	3.75	226	4.95
46	1663.39	C9M	56.1	3.27	23.4	117	107	20.6	44.8	68	124	924	41.9	73.1	12.4	4.26	300	1.75
47	1667.36	C9M	33.8	2.76	13.2	79.9	76.4	13.5	29.8	43.6	83.9	936	38.7	67.1	13.9	5.02	286	2.2
48	1668.27	C9M	39.5	2.58	15.5	91.2	80.7	15.5	30.2	50.8	99.8	950	44	78.1	13.9	4.47	273	1.99
49	1671.39	C9M	31	3.09	16.6	102	84.7	18.1	35.7	60.2	109	711	36.8	64.4	13.4	7.01	287	3.92
50	1671.89	C9M	39.6	2.55	23.9	102	114	21	46.1	50.1	112	910	70.5	117	15.6	7.17	451	5.09
51	1753.25	C9M	25.4	2.21	14.2	66.8	66	16.4	34.3	50.2	99.1	977	39.6	71.4	12.5	4.62	311	6.16
52	1750.3	C9M	35.6	2.58	17.2	84.9	89.7	16	35.7	51.9	90.2	1105	46.1	83.8	15.4	4.94	307	3.12
53	1752.4	C9M	24.5	2.49	14.8	77.9	68.3	16.3	35.7	53	93	976	43.9	78	18.1	7.36	317	6.58
54	1749.35	C9M	26.4	2.23	15.8	58.4	65.6	13.1	21.7	33.6	102	922	33	57.2	12.1	3.45	429	1.53
55	1755.28	C9M	42.2	2.81	18.8	107	108	19.4	46.7	57.3	115	840	44.2	79.4	16.9	6.18	240	3.85
56	1748.33	C9M	38	2.31	16.5	96.2	87	18.2	40	59.6	96.9	888	47.7	85.9	13.4	5.95	278	4.46
57	1360	C9M	39.6	2.95	17.5	98.8	194	18.8	42.4	53.9	102	690	36	64.1	14.5	5.04	237	4.95
58	1362.17	C9M	42.2	2.84	18.3	96.2	114	18.4	42.4	55	103	826	46.7	86.1	16.2	4.77	265	2.85
59	1363.09	C9M	32.9	2.52	17.9	138	111	19.3	43.1	73.2	120	605	38.3	67.9	11.9	7.58	262	7.53
60	1365.15	C9M	31.8	1.72	15.1	61	123	10.6	25.3	23.5	72.5	526	31.8	60.3	8.99	2.45	306	1.39