Formation age of the Gaofan Group in Wutai area: New evidence from SHRIMP U-Pb zircon dating

doi:10.13745/j.esf.sf.2022.2.6

Abstract

Abstract:

The Gaofan Group in Wutai area is of great significance for the sequence establishment of Early Precambrian metamorphic strata in the North China Craton. This paper carried out the geochemical analysis and SHRIMP U-Pb zircon dating of the Mohe Formation of the Gaofan Group. The metamorphic sedimentary rocks have a total REE (rare earth elements) content of (132.78-231.84)×10^-6 (except for sample W1927, which has a total REE of 1016.55×10^-6), with weak enrichment of LREE (light REE) relative to HREE (heavy REE) ((La/Yb)_N between 4.5-12.5) and obvious negative Eu anomaly (δEu between 0.37-0.62), and are similar in REE composition to post-Archean argillaceous rocks. A muscovite-quartz schist sample (D004) has a large number of detrital zircons aged around 2.7 Ga, 2.5 Ga, 2.54 Ga, 2.3 Ga and 2.18 Ga, with the youngest grains derived probably from contemporary volcanic rocks. A pyrite-bearing muscovite schist sample (W1927) has the youngest zircon age of 2194 Ma, which is considered to represent the deposition time of the rock. Combined with previous studies, it is concluded that the formation age of the Gaofan Group can be constrained between less than 2176 Ma and 2350 Ma, and the detrital materials are mainly derived from Neoarchean-Paleoproterozoic metamorphic basement in Hengshan, Wutai, Fuping, Yunzhongshan, Luliang areas or further afield.

Key words: Gaofan Group, Paleoproterozoic, North China Craton, zircon, SHRIMP U-Pb dating

CLC Number:

P597

WAN Yusheng, DONG Chunyan, LI Pengchuan, MIAO Peisen, WANG Huichu, LI Jianrong. Formation age of the Gaofan Group in Wutai area: New evidence from SHRIMP U-Pb zircon dating[J]. Earth Science Frontiers, 2022, 29(2): 45-55.

Figures/Tables 8

References 35

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分析点	²⁰⁶Pb_c/ %	w_B/10^-6		Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	年龄/Ma						不谐和度/%
分析点	²⁰⁶Pb_c/ %	U	Th	Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb		±1σ		不谐和度/%
白云石英片岩(D004)
1.1	0.04	225	116	0.53	81	0.146 3	0.51	8.460	1.8	0.419 6	1.7	0.96	2 259	33		2 303		9	2
2.1	0.02	293	147	0.52	100	0.145 4	0.53	7.960	1.8	0.397 0	1.7	0.96	2 155	31		2 293		9	6
3.1	0.13	312	157	0.52	90	0.143 9	0.57	6.620	1.8	0.333 7	1.7	0.95	1 856	27		2 275		10	18
4.1	0.20	137	58	0.44	48	0.144 0	0.85	8.050	2.0	0.405 6	1.8	0.90	2 195	33		2 276		15	4
5.1	0.15	118	74	0.65	43	0.147 2	0.96	8.470	2.1	0.417 4	1.8	0.89	2 249	35		2 313		16	3
6.1	0.10	136	101	0.77	51	0.148 1	0.79	8.930	2.0	0.437 0	1.8	0.92	2 337	36		2 324		13	-1
7.1	0.30	330	422	1.32	90	0.160 1	0.61	6.980	2.1	0.316 2	2.0	0.95	1 771	30		2 457		10	28
8.1	0.26	101	41	0.42	38	0.147 3	1.10	8.770	2.2	0.431 7	1.9	0.87	2 313	37		2 314		19	0
9.1	0.19	151	158	1.08	39	0.131 8	1.00	5.410	2.1	0.297 7	1.8	0.87	1 680	27		2 122		18	21
10.1	0.24	250	161	0.67	64	0.133 0	0.86	5.460	2.0	0.298 0	1.8	0.90	1 681	26		2 138		15	21
11.1	0.08	100	56	0.58	42	0.166 4	0.77	11.150	2.0	0.486 2	1.8	0.92	2 554	39		2 521		13	-1
12.1	0.14	411	66	0.16	115	0.145 8	0.55	6.570	1.8	0.326 8	1.7	0.95	1 823	27		2 297		10	21
13.1	0.21	374	172	0.47	100	0.179 4	0.57	7.660	1.8	0.309 5	1.7	0.95	1 738	26		2 647		10	34
14.1	0.08	188	168	0.92	66	0.149 8	0.73	8.370	1.9	0.404 9	1.8	0.92	2 192	33		2 344		13	7
15.1	0.54	394	235	0.62	44	0.129 1	1.00	2.313	2.0	0.130 0	1.7	0.85	788	13		2 086		18	62
16.1	0.04	147	115	0.81	49	0.137 6	0.79	7.330	2.0	0.386 2	1.8	0.92	2 105	32		2 198		14	4
17.1	0.35	604	650	1.11	126	0.151 6	0.70	5.050	1.9	0.241 5	1.8	0.93	1 395	22		2 364		12	41
18.1	0.07	244	163	0.69	95	0.148 3	0.48	9.250	1.8	0.452 5	1.7	0.96	2 406	34		2 327		8	-3
19.1	0.08	203	164	0.83	54	0.136 7	0.74	5.830	1.9	0.309 4	1.8	0.92	1 738	27		2 186		13	21
20.1	0.05	140	135	1.00	47	0.136 8	0.77	7.350	1.9	0.389 8	1.8	0.92	2 122	32		2 187		13	3
21.1	0.08	96	40	0.44	37	0.146 4	0.84	9.170	2.0	0.454 1	1.8	0.91	2 413	37		2 305		14	-5
22.1	0.12	184	121	0.68	56	0.135 3	0.69	6.550	2.1	0.351 1	1.9	0.94	1 940	32		2 168		12	11
23.1	0.02	203	100	0.51	71	0.135 3	0.62	7.570	1.8	0.406 1	1.7	0.94	2 197	32		2 167		11	-1
24.1	0.19	169	170	1.04	53	0.136 0	0.76	6.840	1.9	0.364 8	1.8	0.92	2 005	30		2 177		13	8
25.1	0.05	129	89	0.71	45	0.135 5	0.74	7.610	1.9	0.407 6	1.8	0.92	2 204	33		2 170		13	-2
26.1	0.02	148	114	0.80	58	0.155 3	0.57	9.810	1.8	0.458 3	1.7	0.95	2 432	35		2 405		10	-1
27.1	0.18	333	259	0.80	88	0.138 1	0.53	5.820	1.8	0.305 6	1.7	0.95	1 719	25		2 203		9	22
28.1	0.03	163	100	0.63	58	0.136 3	0.61	7.820	1.8	0.416 1	1.7	0.94	2 243	33		2 181		11	-3
29.1	0.21	425	440	1.07	94	0.145 5	0.62	5.146	1.8	0.256 5	1.7	0.94	1 472	22		2 294		11	36
30.1	0.11	249	193	0.80	61	0.134 1	0.70	5.240	1.8	0.283 4	1.7	0.92	1 608	24		2 152		12	25
31.1	0.09	245	139	0.59	79	0.133 2	0.54	6.870	1.8	0.373 8	1.7	0.95	2 047	30		2 141		9	4
32.1	0.15	249	260	1.08	67	0.174 4	0.58	7.500	1.8	0.311 9	1.7	0.95	1 750	26		2 600		10	33
33.1	0.13	207	122	0.61	78	0.167 4	0.92	10.070	2.0	0.436 5	1.7	0.88	2 335	34		2 532		16	8
34.1	0.03	133	106	0.83	59	0.167 0	0.55	11.910	1.8	0.517 3	1.8	0.95	2 688	39		2 528		9	-6
35.1	0.09	71	26	0.37	33	0.180 5	0.77	13.260	2.4	0.533 0	2.3	0.95	2 752	51		2 658		13	-4
36.1	0.19	246	145	0.61	67	0.134 3	0.64	5.900	1.8	0.318 6	1.7	0.94	1 783	27		2 155		11	17
37.1	0.04	123	67	0.56	46	0.151 1	0.65	9.100	1.9	0.436 5	1.8	0.94	2 335	35		2 359		11	1
38.1	0.16	621	431	0.72	149	0.150 2	0.43	5.780	1.8	0.279 2	1.8	0.97	1 587	25		2 349		7	32
39.1	0.06	134	78	0.60	57	0.166 1	0.59	11.270	1.9	0.491 8	1.8	0.95	2 579	38		2 519		10	-2
40.1	0.26	120	68	0.59	44	0.134 9	1.10	7.980	2.1	0.429 2	1.8	0.87	2 302	36		2 163		18	-6
41.1	0.26	85	74	0.91	32	0.160 4	0.92	9.610	2.1	0.434 6	1.8	0.90	2 326	36		2 459		15	5
42.1	0.10	225	180	0.83	108	0.183 2	0.53	14.070	1.8	0.556 8	1.7	0.96	2 854	40		2 682		9	-6
43.1	0.46	310	171	0.57	61	0.129 0	0.94	4.080	2.0	0.229 4	1.7	0.88	1 331	21		2 084		17	36
44.1	0.09	182	141	0.80	62	0.134 8	0.75	7.320	1.9	0.393 6	1.8	0.92	2 140	32		2 162		13	1
45.1	0.13	83	44	0.55	38	0.183 5	0.80	13.400	2.1	0.529 0	1.9	0.92	2 739	42		2 685		13	-2
46.1	0.16	233	147	0.65	63	0.144 1	0.75	6.210	1.9	0.312 6	1.8	0.92	1 754	27		2 278		13	23
47.1	0.09	170	113	0.68	54	0.148 0	0.74	7.530	1.9	0.369 0	1.8	0.92	2 025	31		2 322		13	13
48.1	0.07	100	27	0.28	33	0.136 3	0.95	7.080	2.1	0.376 8	1.9	0.89	2 061	33		2 181		17	6
49.1	0.12	128	124	1.01	50	0.162 0	0.77	10.210	2.0	0.456 8	1.8	0.92	2 425	37		2 477		13	2
50.1	0.24	505	185	0.38	119	0.138 7	0.58	5.222	1.8	0.273 0	1.7	0.95	1 556	24		2 211		10	30
分析点	²⁰⁶Pb_c/ %	w_B/10^-6		Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	年龄/Ma						不谐和度/%
分析点	²⁰⁶Pb_c/ %	U	Th	Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb		±1σ		不谐和度/%
白云石英片岩(D004)
51.1	0.12	235	143	0.63	80	0.145 9	0.61	7.940	1.8	0.394 6	1.7	0.94	2 144	32		2 298		10	7
52.1	0.07	211	143	0.70	82	0.147 1	0.57	9.100	1.8	0.448 9	1.7	0.95	2 390	35		2 312		10	-3
53.1	0.19	338	153	0.47	84	0.134 0	0.63	5.329	1.8	0.288 5	1.7	0.94	1 634	25		2 151		11	24
54.1	0.18	92	116	1.30	37	0.158 6	0.90	10.170	2.1	0.465 0	1.9	0.90	2 462	38		2 440		15	-1
55.1	0.09	196	123	0.65	65	0.146 7	0.66	7.740	1.9	0.382 8	1.8	0.94	2 090	32		2 308		11	9
56.1	0.29	333	223	0.69	78	0.133 8	0.64	5.040	3.6	0.273 4	3.6	0.98	1 558	49		2 148		11	27
57.1	0.05	199	84	0.43	76	0.146 1	0.56	8.920	1.8	0.442 9	1.7	0.95	2 363	34		2 300		10	-3
58.1	0.07	140	157	1.16	43	0.135 5	0.77	6.670	2.0	0.356 9	1.8	0.92	1 967	31		2 170		13	9
59.1	0.08	274	159	0.60	113	0.182 4	0.51	12.090	1.8	0.480 7	1.7	0.96	2 530	36		2 675		9	5
60.1	0.20	144	76	0.54	44	0.134 7	0.79	6.500	2.0	0.349 9	1.8	0.92	1 934	30		2 160		14	10
61.1	0.30	311	165	0.55	84	0.142 5	0.65	6.130	1.8	0.312 3	1.7	0.93	1 752	26		2 257		11	22
62.1	0.07	195	69	0.36	83	0.179 1	0.54	12.160	1.8	0.492 4	1.7	0.95	2 581	37		2 645		9	2
63.1	0.38	373	235	0.65	91	0.151 6	0.60	5.900	1.8	0.282 4	1.7	0.94	1 603	24		2 364		10	32
64.1	0.03	140	112	0.82	59	0.162 6	0.55	10.900	1.8	0.486 4	1.8	0.95	2 555	37		2 483		9	-3
65.1	0.32	355	189	0.55	79	0.140 9	0.64	5.030	1.8	0.258 9	1.7	0.93	1 484	22		2 238		11	34
66.1	0.09	292	116	0.41	116	0.162 4	0.46	10.370	1.8	0.463 2	1.7	0.97	2 454	35		2 481		8	1
67.1	0.03	226	132	0.60	76	0.146 1	0.52	7.900	1.8	0.392 4	1.7	0.96	2 134	31		2 301		9	7
68.1	0.14	129	79	0.63	42	0.134 9	0.87	7.110	2.0	0.382 2	1.8	0.90	2 087	33		2 163		15	4
69.1	0.04	124	61	0.51	45	0.147 5	0.66	8.550	1.9	0.420 2	1.8	0.94	2 261	34		2 318		11	2
70.1	0.02	218	107	0.51	88	0.166 4	0.50	10.810	1.8	0.471 2	1.7	0.96	2 489	36		2 521		8	1
71.1	0.06	272	125	0.48	85	0.145 4	0.66	7.270	1.9	0.362 6	1.7	0.94	1 995	30		2 292		11	13
72.1	0.50	705	555	0.81	119	0.133 8	0.54	3.611	1.7	0.195 7	1.7	0.95	1 152	17		2 149		10	46
73.1	0.02	172	125	0.75	66	0.146 6	0.49	9.080	1.8	0.449 1	1.7	0.96	2 391	34		2 307		8	-4
74.1	1.24	525	75	0.15	148	0.117 5	1.10	5.230	2.1	0.323 1	1.8	0.86	1 805	28		1 919		19	6
75.1	0.42	507	298	0.61	88	0.140 3	0.82	3.895	1.9	0.201 4	1.7	0.90	1 183	19		2 231		14	47
76.1	0.09	168	105	0.65	72	0.167 0	0.52	11.540	2.0	0.501 4	1.9	0.96	2 620	41		2 527		9	-4
77.1	0.14	415	243	0.60	162	0.146 7	0.55	9.190	1.8	0.454 5	1.7	0.95	2 415	34		2 308		9	-5
含黄铁矿白云片岩(W1927)
1.1	4.40	1 564	1 447	0.96	140	0.103 6	4.70	1.409	5.0	0.098 7	2.0	0.40	607	12		1 687		85	64
2.1	12.87	2 286	1 522	0.69	158	0.143 0	8.80	1.330	9.1	0.067 6	2.5	0.28	422	10		2 257		150	81
3.1	-0.05	183	116	0.66	64	0.138 3	0.79	7.720	2.1	0.404 9	1.9	0.93	2 192	36		2 206		14	1
3.2	1.23	627	287	0.47	52	0.127 6	2.60	1.675	3.3	0.095 3	2.0	0.60	587	11		2 064		47	72
4.1	0.12	317	265	0.86	57	0.134 8	0.85	3.850	2.1	0.207 1	1.9	0.91	1 214	21		2 161		15	44
5.1	-0.03	251	173	0.71	86	0.137 6	0.77	7.620	2.0	0.401 5	1.9	0.93	2 176	35		2 197		13	1
6.1	-0.05	195	134	0.71	67	0.138 0	0.72	7.640	2.0	0.401 2	1.9	0.94	2 175	35		2 203		13	1
7.1	0.10	168	94	0.57	55	0.146 1	0.84	7.680	2.1	0.381 2	1.9	0.92	2 082	34		2 301		14	10
10.1	0.40	158	99	0.65	45	0.133 3	0.98	6.040	2.2	0.328 7	1.9	0.89	1 832	31		2 142		17	14
11.1	0.09	172	123	0.74	59	0.149 2	0.77	8.190	2.1	0.398 0	1.9	0.93	2 160	35		2 336		13	8
12.1	0.00	196	94	0.50	67	0.184 1	0.63	10.140	2.0	0.399 7	1.9	0.95	2 168	35		2 690		10	19
13.1	0.15	212	133	0.65	66	0.137 3	0.81	6.840	2.1	0.361 3	1.9	0.92	1 988	32		2 194		14	9
15.1	0.15	253	185	0.75	66	0.137 6	0.72	5.760	2.0	0.303 7	1.9	0.94	1 710	29		2 197		13	22
16.1	1.80	1 158	1 135	1.01	113	0.113 4	1.80	1.735	2.5	0.111 0	1.8	0.73	678	12		1 854		31	63
17.1	0.01	214	142	0.69	73	0.137 0	0.70	7.490	2.0	0.396 8	1.9	0.94	2 154	35		2 189		12	2
19.1	0.02	218	130	0.62	79	0.161 7	0.84	9.440	2.1	0.423 3	1.9	0.92	2 276	37		2 474		14	8
20.1	-0.11	137	64	0.49	49	0.136 5	0.82	7.870	2.1	0.418 0	2.0	0.92	2 252	37		2 184		14	-3
21.1	0.08	243	125	0.53	70	0.153 1	2.30	7.100	3.0	0.336 6	1.9	0.64	1 870	31		2 381		39	21
22.1	1.69	1 162	1 007	0.90	93	0.130 3	1.70	1.633	2.6	0.091 0	2.0	0.76	561	11		2 101		29	73
23.1	1.14	999	838	0.87	109	0.107 7	1.90	1.862	2.7	0.125 5	1.8	0.69	762	13		1 760		35	57
24.1	0.07	178	87	0.51	63	0.136 7	0.71	7.770	2.0	0.412 2	1.9	0.94	2 225	36		2 186		12	-2

分析点	²⁰⁶Pb_c/ %	w_B/10^-6		Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	年龄/Ma						不谐和度/%
分析点	²⁰⁶Pb_c/ %	U	Th	Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb		±1σ		不谐和度/%
白云石英片岩(D004)
1.1	0.04	225	116	0.53	81	0.146 3	0.51	8.460	1.8	0.419 6	1.7	0.96	2 259	33		2 303		9	2
2.1	0.02	293	147	0.52	100	0.145 4	0.53	7.960	1.8	0.397 0	1.7	0.96	2 155	31		2 293		9	6
3.1	0.13	312	157	0.52	90	0.143 9	0.57	6.620	1.8	0.333 7	1.7	0.95	1 856	27		2 275		10	18
4.1	0.20	137	58	0.44	48	0.144 0	0.85	8.050	2.0	0.405 6	1.8	0.90	2 195	33		2 276		15	4
5.1	0.15	118	74	0.65	43	0.147 2	0.96	8.470	2.1	0.417 4	1.8	0.89	2 249	35		2 313		16	3
6.1	0.10	136	101	0.77	51	0.148 1	0.79	8.930	2.0	0.437 0	1.8	0.92	2 337	36		2 324		13	-1
7.1	0.30	330	422	1.32	90	0.160 1	0.61	6.980	2.1	0.316 2	2.0	0.95	1 771	30		2 457		10	28
8.1	0.26	101	41	0.42	38	0.147 3	1.10	8.770	2.2	0.431 7	1.9	0.87	2 313	37		2 314		19	0
9.1	0.19	151	158	1.08	39	0.131 8	1.00	5.410	2.1	0.297 7	1.8	0.87	1 680	27		2 122		18	21
10.1	0.24	250	161	0.67	64	0.133 0	0.86	5.460	2.0	0.298 0	1.8	0.90	1 681	26		2 138		15	21
11.1	0.08	100	56	0.58	42	0.166 4	0.77	11.150	2.0	0.486 2	1.8	0.92	2 554	39		2 521		13	-1
12.1	0.14	411	66	0.16	115	0.145 8	0.55	6.570	1.8	0.326 8	1.7	0.95	1 823	27		2 297		10	21
13.1	0.21	374	172	0.47	100	0.179 4	0.57	7.660	1.8	0.309 5	1.7	0.95	1 738	26		2 647		10	34
14.1	0.08	188	168	0.92	66	0.149 8	0.73	8.370	1.9	0.404 9	1.8	0.92	2 192	33		2 344		13	7
15.1	0.54	394	235	0.62	44	0.129 1	1.00	2.313	2.0	0.130 0	1.7	0.85	788	13		2 086		18	62
16.1	0.04	147	115	0.81	49	0.137 6	0.79	7.330	2.0	0.386 2	1.8	0.92	2 105	32		2 198		14	4
17.1	0.35	604	650	1.11	126	0.151 6	0.70	5.050	1.9	0.241 5	1.8	0.93	1 395	22		2 364		12	41
18.1	0.07	244	163	0.69	95	0.148 3	0.48	9.250	1.8	0.452 5	1.7	0.96	2 406	34		2 327		8	-3
19.1	0.08	203	164	0.83	54	0.136 7	0.74	5.830	1.9	0.309 4	1.8	0.92	1 738	27		2 186		13	21
20.1	0.05	140	135	1.00	47	0.136 8	0.77	7.350	1.9	0.389 8	1.8	0.92	2 122	32		2 187		13	3
21.1	0.08	96	40	0.44	37	0.146 4	0.84	9.170	2.0	0.454 1	1.8	0.91	2 413	37		2 305		14	-5
22.1	0.12	184	121	0.68	56	0.135 3	0.69	6.550	2.1	0.351 1	1.9	0.94	1 940	32		2 168		12	11
23.1	0.02	203	100	0.51	71	0.135 3	0.62	7.570	1.8	0.406 1	1.7	0.94	2 197	32		2 167		11	-1
24.1	0.19	169	170	1.04	53	0.136 0	0.76	6.840	1.9	0.364 8	1.8	0.92	2 005	30		2 177		13	8
25.1	0.05	129	89	0.71	45	0.135 5	0.74	7.610	1.9	0.407 6	1.8	0.92	2 204	33		2 170		13	-2
26.1	0.02	148	114	0.80	58	0.155 3	0.57	9.810	1.8	0.458 3	1.7	0.95	2 432	35		2 405		10	-1
27.1	0.18	333	259	0.80	88	0.138 1	0.53	5.820	1.8	0.305 6	1.7	0.95	1 719	25		2 203		9	22
28.1	0.03	163	100	0.63	58	0.136 3	0.61	7.820	1.8	0.416 1	1.7	0.94	2 243	33		2 181		11	-3
29.1	0.21	425	440	1.07	94	0.145 5	0.62	5.146	1.8	0.256 5	1.7	0.94	1 472	22		2 294		11	36
30.1	0.11	249	193	0.80	61	0.134 1	0.70	5.240	1.8	0.283 4	1.7	0.92	1 608	24		2 152		12	25
31.1	0.09	245	139	0.59	79	0.133 2	0.54	6.870	1.8	0.373 8	1.7	0.95	2 047	30		2 141		9	4
32.1	0.15	249	260	1.08	67	0.174 4	0.58	7.500	1.8	0.311 9	1.7	0.95	1 750	26		2 600		10	33
33.1	0.13	207	122	0.61	78	0.167 4	0.92	10.070	2.0	0.436 5	1.7	0.88	2 335	34		2 532		16	8
34.1	0.03	133	106	0.83	59	0.167 0	0.55	11.910	1.8	0.517 3	1.8	0.95	2 688	39		2 528		9	-6
35.1	0.09	71	26	0.37	33	0.180 5	0.77	13.260	2.4	0.533 0	2.3	0.95	2 752	51		2 658		13	-4
36.1	0.19	246	145	0.61	67	0.134 3	0.64	5.900	1.8	0.318 6	1.7	0.94	1 783	27		2 155		11	17
37.1	0.04	123	67	0.56	46	0.151 1	0.65	9.100	1.9	0.436 5	1.8	0.94	2 335	35		2 359		11	1
38.1	0.16	621	431	0.72	149	0.150 2	0.43	5.780	1.8	0.279 2	1.8	0.97	1 587	25		2 349		7	32
39.1	0.06	134	78	0.60	57	0.166 1	0.59	11.270	1.9	0.491 8	1.8	0.95	2 579	38		2 519		10	-2
40.1	0.26	120	68	0.59	44	0.134 9	1.10	7.980	2.1	0.429 2	1.8	0.87	2 302	36		2 163		18	-6
41.1	0.26	85	74	0.91	32	0.160 4	0.92	9.610	2.1	0.434 6	1.8	0.90	2 326	36		2 459		15	5
42.1	0.10	225	180	0.83	108	0.183 2	0.53	14.070	1.8	0.556 8	1.7	0.96	2 854	40		2 682		9	-6
43.1	0.46	310	171	0.57	61	0.129 0	0.94	4.080	2.0	0.229 4	1.7	0.88	1 331	21		2 084		17	36
44.1	0.09	182	141	0.80	62	0.134 8	0.75	7.320	1.9	0.393 6	1.8	0.92	2 140	32		2 162		13	1
45.1	0.13	83	44	0.55	38	0.183 5	0.80	13.400	2.1	0.529 0	1.9	0.92	2 739	42		2 685		13	-2
46.1	0.16	233	147	0.65	63	0.144 1	0.75	6.210	1.9	0.312 6	1.8	0.92	1 754	27		2 278		13	23
47.1	0.09	170	113	0.68	54	0.148 0	0.74	7.530	1.9	0.369 0	1.8	0.92	2 025	31		2 322		13	13
48.1	0.07	100	27	0.28	33	0.136 3	0.95	7.080	2.1	0.376 8	1.9	0.89	2 061	33		2 181		17	6
49.1	0.12	128	124	1.01	50	0.162 0	0.77	10.210	2.0	0.456 8	1.8	0.92	2 425	37		2 477		13	2
50.1	0.24	505	185	0.38	119	0.138 7	0.58	5.222	1.8	0.273 0	1.7	0.95	1 556	24		2 211		10	30
分析点	²⁰⁶Pb_c/ %	w_B/10^-6		Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	年龄/Ma						不谐和度/%
分析点	²⁰⁶Pb_c/ %	U	Th	Th/U	²⁰⁶Pb^*/ 10^-6	²⁰⁷Pb^/ ²⁰⁶Pb^	±1σ/ %	²⁰⁷Pb^*/ ²³⁵U	±1σ/ %	²⁰⁶Pb^*/ ²³⁸U	±1σ/ %	误差相关系数	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb		±1σ		不谐和度/%
白云石英片岩(D004)
51.1	0.12	235	143	0.63	80	0.145 9	0.61	7.940	1.8	0.394 6	1.7	0.94	2 144	32		2 298		10	7
52.1	0.07	211	143	0.70	82	0.147 1	0.57	9.100	1.8	0.448 9	1.7	0.95	2 390	35		2 312		10	-3
53.1	0.19	338	153	0.47	84	0.134 0	0.63	5.329	1.8	0.288 5	1.7	0.94	1 634	25		2 151		11	24
54.1	0.18	92	116	1.30	37	0.158 6	0.90	10.170	2.1	0.465 0	1.9	0.90	2 462	38		2 440		15	-1
55.1	0.09	196	123	0.65	65	0.146 7	0.66	7.740	1.9	0.382 8	1.8	0.94	2 090	32		2 308		11	9
56.1	0.29	333	223	0.69	78	0.133 8	0.64	5.040	3.6	0.273 4	3.6	0.98	1 558	49		2 148		11	27
57.1	0.05	199	84	0.43	76	0.146 1	0.56	8.920	1.8	0.442 9	1.7	0.95	2 363	34		2 300		10	-3
58.1	0.07	140	157	1.16	43	0.135 5	0.77	6.670	2.0	0.356 9	1.8	0.92	1 967	31		2 170		13	9
59.1	0.08	274	159	0.60	113	0.182 4	0.51	12.090	1.8	0.480 7	1.7	0.96	2 530	36		2 675		9	5
60.1	0.20	144	76	0.54	44	0.134 7	0.79	6.500	2.0	0.349 9	1.8	0.92	1 934	30		2 160		14	10
61.1	0.30	311	165	0.55	84	0.142 5	0.65	6.130	1.8	0.312 3	1.7	0.93	1 752	26		2 257		11	22
62.1	0.07	195	69	0.36	83	0.179 1	0.54	12.160	1.8	0.492 4	1.7	0.95	2 581	37		2 645		9	2
63.1	0.38	373	235	0.65	91	0.151 6	0.60	5.900	1.8	0.282 4	1.7	0.94	1 603	24		2 364		10	32
64.1	0.03	140	112	0.82	59	0.162 6	0.55	10.900	1.8	0.486 4	1.8	0.95	2 555	37		2 483		9	-3
65.1	0.32	355	189	0.55	79	0.140 9	0.64	5.030	1.8	0.258 9	1.7	0.93	1 484	22		2 238		11	34
66.1	0.09	292	116	0.41	116	0.162 4	0.46	10.370	1.8	0.463 2	1.7	0.97	2 454	35		2 481		8	1
67.1	0.03	226	132	0.60	76	0.146 1	0.52	7.900	1.8	0.392 4	1.7	0.96	2 134	31		2 301		9	7
68.1	0.14	129	79	0.63	42	0.134 9	0.87	7.110	2.0	0.382 2	1.8	0.90	2 087	33		2 163		15	4
69.1	0.04	124	61	0.51	45	0.147 5	0.66	8.550	1.9	0.420 2	1.8	0.94	2 261	34		2 318		11	2
70.1	0.02	218	107	0.51	88	0.166 4	0.50	10.810	1.8	0.471 2	1.7	0.96	2 489	36		2 521		8	1
71.1	0.06	272	125	0.48	85	0.145 4	0.66	7.270	1.9	0.362 6	1.7	0.94	1 995	30		2 292		11	13
72.1	0.50	705	555	0.81	119	0.133 8	0.54	3.611	1.7	0.195 7	1.7	0.95	1 152	17		2 149		10	46
73.1	0.02	172	125	0.75	66	0.146 6	0.49	9.080	1.8	0.449 1	1.7	0.96	2 391	34		2 307		8	-4
74.1	1.24	525	75	0.15	148	0.117 5	1.10	5.230	2.1	0.323 1	1.8	0.86	1 805	28		1 919		19	6
75.1	0.42	507	298	0.61	88	0.140 3	0.82	3.895	1.9	0.201 4	1.7	0.90	1 183	19		2 231		14	47
76.1	0.09	168	105	0.65	72	0.167 0	0.52	11.540	2.0	0.501 4	1.9	0.96	2 620	41		2 527		9	-4
77.1	0.14	415	243	0.60	162	0.146 7	0.55	9.190	1.8	0.454 5	1.7	0.95	2 415	34		2 308		9	-5
含黄铁矿白云片岩(W1927)
1.1	4.40	1 564	1 447	0.96	140	0.103 6	4.70	1.409	5.0	0.098 7	2.0	0.40	607	12		1 687		85	64
2.1	12.87	2 286	1 522	0.69	158	0.143 0	8.80	1.330	9.1	0.067 6	2.5	0.28	422	10		2 257		150	81
3.1	-0.05	183	116	0.66	64	0.138 3	0.79	7.720	2.1	0.404 9	1.9	0.93	2 192	36		2 206		14	1
3.2	1.23	627	287	0.47	52	0.127 6	2.60	1.675	3.3	0.095 3	2.0	0.60	587	11		2 064		47	72
4.1	0.12	317	265	0.86	57	0.134 8	0.85	3.850	2.1	0.207 1	1.9	0.91	1 214	21		2 161		15	44
5.1	-0.03	251	173	0.71	86	0.137 6	0.77	7.620	2.0	0.401 5	1.9	0.93	2 176	35		2 197		13	1
6.1	-0.05	195	134	0.71	67	0.138 0	0.72	7.640	2.0	0.401 2	1.9	0.94	2 175	35		2 203		13	1
7.1	0.10	168	94	0.57	55	0.146 1	0.84	7.680	2.1	0.381 2	1.9	0.92	2 082	34		2 301		14	10
10.1	0.40	158	99	0.65	45	0.133 3	0.98	6.040	2.2	0.328 7	1.9	0.89	1 832	31		2 142		17	14
11.1	0.09	172	123	0.74	59	0.149 2	0.77	8.190	2.1	0.398 0	1.9	0.93	2 160	35		2 336		13	8
12.1	0.00	196	94	0.50	67	0.184 1	0.63	10.140	2.0	0.399 7	1.9	0.95	2 168	35		2 690		10	19
13.1	0.15	212	133	0.65	66	0.137 3	0.81	6.840	2.1	0.361 3	1.9	0.92	1 988	32		2 194		14	9
15.1	0.15	253	185	0.75	66	0.137 6	0.72	5.760	2.0	0.303 7	1.9	0.94	1 710	29		2 197		13	22
16.1	1.80	1 158	1 135	1.01	113	0.113 4	1.80	1.735	2.5	0.111 0	1.8	0.73	678	12		1 854		31	63
17.1	0.01	214	142	0.69	73	0.137 0	0.70	7.490	2.0	0.396 8	1.9	0.94	2 154	35		2 189		12	2
19.1	0.02	218	130	0.62	79	0.161 7	0.84	9.440	2.1	0.423 3	1.9	0.92	2 276	37		2 474		14	8
20.1	-0.11	137	64	0.49	49	0.136 5	0.82	7.870	2.1	0.418 0	2.0	0.92	2 252	37		2 184		14	-3
21.1	0.08	243	125	0.53	70	0.153 1	2.30	7.100	3.0	0.336 6	1.9	0.64	1 870	31		2 381		39	21
22.1	1.69	1 162	1 007	0.90	93	0.130 3	1.70	1.633	2.6	0.091 0	2.0	0.76	561	11		2 101		29	73
23.1	1.14	999	838	0.87	109	0.107 7	1.90	1.862	2.7	0.125 5	1.8	0.69	762	13		1 760		35	57
24.1	0.07	178	87	0.51	63	0.136 7	0.71	7.770	2.0	0.412 2	1.9	0.94	2 225	36		2 186		12	-2

岩石名称	经纬度	w_B/%
岩石名称	经纬度	SiO₂		TiO₂			Al₂O₃			Fe₂O₃			FeO			MnO			MgO			CaO			Na₂O			K₂O		P₂O₅				H₂O⁺			CO₂			LOI			Total
千枚岩	N38°59'17.8″/E113°08'52.9″	59.95		0.71			21.76			3.41			0.74			0.07			0.90			0.52			1.98			5.91		0.20				3.06			0.32			—			99.50
千枚岩	N38°59'17.8″/E113°08'52.9″	62.86		0.56			16.66			3.87			1.81			0.09			2.72			2.12			1.79			3.86		0.13				2.88			0.32			—			99.70
石榴云母片岩	N38°59'14.6″/E113°08'59.0″	43.23		0.52			18.13			3.90			21.07			0.44			2.71			1.41			0.09			1.51		0.14				5.98			0.23			—			99.40
含黄铁矿云母石英片岩	N38°58'29.9″/E113°9'29.5″	64.52		0.64			20.11			2.18			0.81			0.06			1.26			0.40			0.13			6.70		0.15				1.98			0.72			—			99.70
云母石英片岩	N38°58'17.9″/E113°9'35.8″	76.71		0.38			12.35			1.44			2.74			0.03			1.50			0.14			0.25			2.52		0.09				—			—			2.29			100.44
绿泥片岩	N38°58'29.9″/E113°9'29.5″	44.88		0.76			17.57			1.11			8.39			0.14			7.84			5.36			2.56			1.50		0.08				5.16			4.64			—			100.00
岩石名称	经纬度	w_B/10^-6
岩石名称	经纬度	Cr	Ni			Sc			Rb			Ba			Sr			Nb			Ta			Hf			Zr		Y		Th		U			La			Ce		Pr
千枚岩	N38°59'17.8″/E113°08'52.9″	32	—			12			178			1 407			95			19.7			1.9			8.9			434		24		20.4		3.40			22.30			63.60		5.57
千枚岩	N38°59'17.8″/E113°08'52.9″	204	—			14			105			1 013			223			12.0			1.2			5.4			234		24		15.2		2.45			32.60			64.00		7.78
石榴云母片岩	N38°59'14.6″/E113°08'59.0″	28	—			18			63			485			25			25.9			1.8			8.5			465		40		22.8		4.50			46.30			89.10		11.70
含黄铁矿云母石英片岩	N38°58'29.9″/E113°9'29.5″	3	3			18			303			1 798			29			44.3			3.8			24.4			757		160		60.0		12.00			215.00			430.00		44.60
云母石英片岩	N38°58'17.9″/E113°9'35.8″	23	12			6			97			473			23			13.9			0.9			8.9			346		23		14.0		3.50			38.99			78.51		8.97
绿泥片岩	N38°58'29.9″/E113°9'29.5″	104	125			24			56			739			148			2.2			0.2			1.6			53		14		1.5		0.30			7.54			14.90		2.04
岩石名称	经纬度	w_B/10^-6																																				(La/Yb)_N				δEu
岩石名称	经纬度	Nd			Sm			Eu			Gd			Tb			Dy			Ho			Er			Tm			Yb			Lu			ΣREE			(La/Yb)_N				δEu
千枚岩	N38°59'17.8″/E113°08'52.9″	20.10			3.97			0.77			3.49			0.67			4.21			0.92			2.93			0.47			3.28			0.50			132.78			4.5				0.62
千枚岩	N38°59'17.8″/E113°08'52.9″	29.70			5.49			1.03			4.50			0.72			4.08			0.90			2.69			0.40			2.77			0.43			157.09			7.8				0.62
石榴云母片岩	N38°59'14.6″/E113°08'59.0″	44.50			8.54			1.28			7.54			1.29			7.31			1.60			5.01			0.82			5.93			0.92			231.84			5.1				0.48
含黄铁矿云母石英片岩	N38°58'29.9″/E113°9'29.5″	189.00			31.90			3.62			27.00			5.05			27.30			5.91			16.70			2.46			15.80			2.21			1 016.55			9.0				0.37
云母石英片岩	N38°58'17.9″/E113°9'35.8″	33.01			6.08			0.84			4.97			0.80			4.35			0.81			2.28			0.33			2.06			0.35			182.34			12.5				0.46
绿泥片岩	N38°58'29.9″/E113°9'29.5″	11.00			2.37			0.76			2.60			0.41			2.46			0.50			1.49			0.21			1.22			0.20			47.70			4.1				0.94

岩石名称	经纬度	w_B/%
岩石名称	经纬度	SiO₂		TiO₂			Al₂O₃			Fe₂O₃			FeO			MnO			MgO			CaO			Na₂O			K₂O		P₂O₅				H₂O⁺			CO₂			LOI			Total
千枚岩	N38°59'17.8″/E113°08'52.9″	59.95		0.71			21.76			3.41			0.74			0.07			0.90			0.52			1.98			5.91		0.20				3.06			0.32			—			99.50
千枚岩	N38°59'17.8″/E113°08'52.9″	62.86		0.56			16.66			3.87			1.81			0.09			2.72			2.12			1.79			3.86		0.13				2.88			0.32			—			99.70
石榴云母片岩	N38°59'14.6″/E113°08'59.0″	43.23		0.52			18.13			3.90			21.07			0.44			2.71			1.41			0.09			1.51		0.14				5.98			0.23			—			99.40
含黄铁矿云母石英片岩	N38°58'29.9″/E113°9'29.5″	64.52		0.64			20.11			2.18			0.81			0.06			1.26			0.40			0.13			6.70		0.15				1.98			0.72			—			99.70
云母石英片岩	N38°58'17.9″/E113°9'35.8″	76.71		0.38			12.35			1.44			2.74			0.03			1.50			0.14			0.25			2.52		0.09				—			—			2.29			100.44
绿泥片岩	N38°58'29.9″/E113°9'29.5″	44.88		0.76			17.57			1.11			8.39			0.14			7.84			5.36			2.56			1.50		0.08				5.16			4.64			—			100.00
岩石名称	经纬度	w_B/10^-6
岩石名称	经纬度	Cr	Ni			Sc			Rb			Ba			Sr			Nb			Ta			Hf			Zr		Y		Th		U			La			Ce		Pr
千枚岩	N38°59'17.8″/E113°08'52.9″	32	—			12			178			1 407			95			19.7			1.9			8.9			434		24		20.4		3.40			22.30			63.60		5.57
千枚岩	N38°59'17.8″/E113°08'52.9″	204	—			14			105			1 013			223			12.0			1.2			5.4			234		24		15.2		2.45			32.60			64.00		7.78
石榴云母片岩	N38°59'14.6″/E113°08'59.0″	28	—			18			63			485			25			25.9			1.8			8.5			465		40		22.8		4.50			46.30			89.10		11.70
含黄铁矿云母石英片岩	N38°58'29.9″/E113°9'29.5″	3	3			18			303			1 798			29			44.3			3.8			24.4			757		160		60.0		12.00			215.00			430.00		44.60
云母石英片岩	N38°58'17.9″/E113°9'35.8″	23	12			6			97			473			23			13.9			0.9			8.9			346		23		14.0		3.50			38.99			78.51		8.97
绿泥片岩	N38°58'29.9″/E113°9'29.5″	104	125			24			56			739			148			2.2			0.2			1.6			53		14		1.5		0.30			7.54			14.90		2.04
岩石名称	经纬度	w_B/10^-6																																				(La/Yb)_N				δEu
岩石名称	经纬度	Nd			Sm			Eu			Gd			Tb			Dy			Ho			Er			Tm			Yb			Lu			ΣREE			(La/Yb)_N				δEu
千枚岩	N38°59'17.8″/E113°08'52.9″	20.10			3.97			0.77			3.49			0.67			4.21			0.92			2.93			0.47			3.28			0.50			132.78			4.5				0.62
千枚岩	N38°59'17.8″/E113°08'52.9″	29.70			5.49			1.03			4.50			0.72			4.08			0.90			2.69			0.40			2.77			0.43			157.09			7.8				0.62
石榴云母片岩	N38°59'14.6″/E113°08'59.0″	44.50			8.54			1.28			7.54			1.29			7.31			1.60			5.01			0.82			5.93			0.92			231.84			5.1				0.48
含黄铁矿云母石英片岩	N38°58'29.9″/E113°9'29.5″	189.00			31.90			3.62			27.00			5.05			27.30			5.91			16.70			2.46			15.80			2.21			1 016.55			9.0				0.37
云母石英片岩	N38°58'17.9″/E113°9'35.8″	33.01			6.08			0.84			4.97			0.80			4.35			0.81			2.28			0.33			2.06			0.35			182.34			12.5				0.46
绿泥片岩	N38°58'29.9″/E113°9'29.5″	11.00			2.37			0.76			2.60			0.41			2.46			0.50			1.49			0.21			1.22			0.20			47.70			4.1				0.94