Zircon U–Pb Dating and Lu-Hf Isotope of the Retrograded Eclogite from Chicheng, Northern Hebei Province, China

Table 1

Zircon LA-ICP-MS U-Pb geochronological analyses of the eclogite (sample 160601 and 160602).

Spot	Pb (ppm)	Th (ppm)	U (ppm)	Th/U	207Pb/235U	±(1δ)	206Pb/238U	±(1δ)	207Pb/235U age (Ma)	±Ma (1δ)	206Pb/238U age (Ma)	±Ma (1δ)
Sample 160601
1.1	6.2	3.1	108	0.029	0.4104	0.0203	0.0556	0.0009	349.2	14.6	348.6	5.2
2.1	4.6	0.2	73	0.003	0.4387	0.0275	0.058	0.0012	369.3	19.4	363.7	7.1
3.1	6	0.2	91	0.002	0.4724	0.0236	0.058	0.001	392.9	16.3	363.6	6.0
4.1	16.1	1.7	280	0.006	0.4091	0.0133	0.0559	0.0007	348.3	9.6	350.7	4.2
5.1	7.7	0.6	127	0.005	0.4156	0.0194	0.0568	0.0008	352.9	13.9	356.4	5.0
6.1	3.4	0.4	57	0.006	0.4247	0.0219	0.0545	0.0008	359.4	15.6	342.1	4.8
7.1	6.1	0.7	106	0.006	0.4121	0.0173	0.0561	0.0007	350.4	12.4	352.0	4.1
8.1	11.7	1.4	205	0.007	0.4078	0.0112	0.055	0.0005	347.3	8.1	345.0	2.9
9.1	3	0.7	48	0.014	0.402	0.0205	0.0552	0.0008	343.1	14.9	346.2	5.0
10.1	2.5	0.3	40	0.009	0.4293	0.0232	0.0569	0.001	362.7	16.5	356.5	5.9
11.1	5.2	0.4	92	0.004	0.4042	0.0133	0.0541	0.0006	344.7	9.6	339.4	3.4
12.1	1.2	0.1	20	0.004	0.4452	0.0332	0.0569	0.0014	373.9	23.3	356.9	8.3
13.1	6.2	0.8	111	0.007	0.398	0.0122	0.0543	0.0005	340.2	8.8	341.2	3.1
14.1	2.6	0.4	39	0.01	0.4367	0.0243	0.0565	0.0009	367.9	17.2	354.4	5.5
15.1	3.7	0.3	58	0.006	0.4577	0.021	0.0579	0.0008	382.7	14.6	362.6	5.1
16.1	3.6	0.6	61	0.009	0.416	0.016	0.0556	0.0006	353.2	11.5	348.9	3.5
17.1	3	0.1	50	0.002	0.4143	0.0184	0.055	0.0007	352	13.2	345.1	4.2
Sample 160602
1.1	3.9	1	59.4	0.017	0.4743	0.034	0.0559	0.0019	337.6	9.6	324.9	3.6
2.1	29.3	23.5	529.5	0.044	0.3702	0.0186	0.0525	0.001	342.9	9	340.6	3.1
3.1	30.7	22.3	562.4	0.04	0.3714	0.0209	0.0512	0.0012	335	6.1	325.1	2.6
4.1	23.3	2.2	413.3	0.005	0.4263	0.0209	0.0554	0.001	360.5	7.4	347.4	3.1
5.1	38.5	42.9	722	0.059	0.3908	0.0168	0.0517	0.0008	341.6	10.3	333.1	3.3
6.1	12.7	21.2	231.8	0.091	0.3945	0.0264	0.0517	0.0012	362.7	20.1	352.0	7.8
7.1	8.2	1	147.3	0.006	0.3999	0.0283	0.053	0.0011	365.2	17.7	358.3	5.8
8.1	13.2	2.4	240.6	0.01	0.4017	0.0248	0.0543	0.001	394.2	18.6	350.9	5.7
9.1	4.6	1.1	81.5	0.014	0.4146	0.0352	0.0539	0.0016	352.2	12.6	338.4	4.8
10.1	4.5	5.6	77.9	0.072	0.4168	0.0382	0.0532	0.0014	353.7	13.7	333.9	4.2
11.1	25.5	20.3	432.9	0.047	0.4388	0.0303	0.0556	0.0013	378.3	9.4	357.7	3.4