Linear Correlation of Ba and Eu Contents by Hydrothermal Activities: A Case Study in the Hetang Formation, South China

Table 3

Concentrations of REEs and Ba of mudrock and chert samples in Batch 2.

Sample	Depth (m)	Petrology	Ba	Sm	Eu	Gd	Eu/Eu
WN2-1	794.30	Chert	17316.14	3.28	3.71	2.97	5.59
WN2-2	789.60	Siliceous mudrock	1818.70	2.07	0.85	2.41	1.76
WN2-3	787.10	Siliceous mudrock	12080.80	1.13	2.70	1.14	11.17
WN2-4	752.00	Carbonaceous mudrock	5345.38	5.16	2.33	6.63	1.83
WN2-5	747.70	Carbonaceous mudrock	6248.18	5.01	2.34	5.83	2.01
WN2-6	727.40	Carbonaceous mudrock	1024.67	3.44	0.92	4.17	1.12
WN2-7	724.90	Carbonaceous mudrock	11288.06	1.39	2.35	1.31	8.18
WN2-8	721.10	Carbonaceous mudrock	9054.77	0.85	1.97	0.81	11.20
WN2-9	716.60	Calcareous mudrock	8602.37	3.29	2.13	2.91	3.24
WN2-10	712.60	Calcareous mudrock	3462.94	1.52	1.09	1.47	3.43
WN2-11	697.80	Calcareous mudrock	1986.20	2.60	0.90	2.25	1.76
WN2-12	694.80	Calcareous mudrock	1211.51	7.52	1.52	5.86	1.08
WN2-13	693.50	Siliceous mudrock	7764.73	1.86	2.15	2.01	5.19
WN2-14	692.60	Siliceous mudrock	5303.73	2.44	1.72	2.83	3.03
WN2-15	692.50	Siliceous mudrock	4536.49	3.09	1.70	3.42	2.45
WN2-16	687.50	Carbonaceous mudrock	1895.46	2.41	0.88	2.25	1.78
WN2-17	684.00	Carbonaceous mudrock	2137.55	3.98	1.29	3.85	1.55
WN2-18	682.40	Carbonaceous mudrock	2255.65	3.24	1.00	2.83	1.55
WN2-19	681.40	Siliceous mudrock	2901.96	4.51	1.51	4.07	1.66