Detrital Zircon Geochronology and Its Geological Significance of Upper Permian Sandstones in Yushigou Area of Western Qilian Mountains, China

doi:10.19657/j.geoscience.1000-8527.2019.01.11

Abstract

Abstract:

Yushigou area is located in the northeastern margin of the Qinghai-Tibetan plateau, and lies tectonically on the southern margin of the North Qilian orogenic belt. We conducted LA-ICP-MS detrital zircon U-Pb dating on the red sandstones from Yushigou. The results yielded four age groups at 260-350 Ma (peak at 314 Ma), 400-500 Ma (peak at 445 Ma), 1,700-2,000 Ma, and 2,200-2,600 Ma. Besides, two zircon grains were dated to be 800-1,000 Ma and another zircon to be 2,056 Ma.Zircons of 260-350 Ma show mainly magmatic (and minor metamorphic) features in CL imaging, reflecting the occurrence of Carboniferous to Early Permian magmatic-metamorphic events. Zircons of 400-500 Ma have mainly a magmatic origin, suggesting that the detrital provenance of the Yushigou sandstones were from arc magmatic rocks and syn-collisional felsic rocks. Zircons of 1,700-2,000 Ma and 2,200-2,600 Ma are dominantly metamorphic with old age information, indicating that the highly metamorphosed basement rocks were the detrital provenance of the sandstones. The few 800-1,000 Ma zircons indicate that the Neoproterozoic batholith had not been significantly exhumed. The youngest detrital zircon age from these sandstones (289±2 Ma) constrains the maximum deposition age of the Yaogou Group to the Early Permian. Comparing the rock features along the geological section, the strata likely belong to the Upper Permian Hongquan Formation. The broad age spectrum reflects the tectono-magmatic events in both the North Qilian orogenic belt and the South-Central Qilian block, and indicates that the Hongquan Formation has two detrital provenances.

Key words: North Qilian orogenic belt, Upper Permian, Hongquan Formation, detrital zircon, U-Pb dating

CLC Number:

P588.21

SONG Zhijie, LIU Wencan, ZHANG Hongyuan, LIU Changfeng, LUO Kai, WU Chen. Detrital Zircon Geochronology and Its Geological Significance of Upper Permian Sandstones in Yushigou Area of Western Qilian Mountains, China[J]. Geoscience, 2019, 33(01): 112-120.

Figures/Tables 5

References 46

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测点号	w_B/10^-6			同位素比值							年龄/Ma
测点号	Pb	U		²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	Th/U	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	最佳年龄	1σ
1	21		285	0.072 0	0.000 5	0.552 2	0.017 8	0.055 7	0.001 8	0.353 3	448	3	446	14	439	71	448	3
2	28		361	0.070 6	0.000 5	0.547 5	0.015 0	0.056 2	0.001 5	0.649 8	440	3	443	12	461	61	440	3
3	22		431	0.049 9	0.000 3	0.365 5	0.006 7	0.053 1	0.001 0	0.399 3	314	2	316	6	334	43	314	2
4	8		24	0.325 1	0.002 2	4.998 7	0.038 6	0.111 5	0.001 0	0.056 3	1 815	12	1 819	14	1 824	16	1 824	16
5	53		154	0.333 9	0.002 1	5.429 2	0.036 4	0.117 9	0.000 9	0.186 7	1 857	12	1 889	13	1 925	14	1 925	14
6	231		707	0.337 4	0.002 2	5.375 8	0.039 8	0.115 5	0.001 0	0.013 5	1 874	12	1 881	14	1 888	15	1 888	15
7	73		204	0.338 0	0.002 2	5.367 6	0.060 3	0.115 2	0.001 4	0.346 6	1 877	12	1 880	21	1 883	22	1 883	22
8	52		159	0.309 8	0.001 9	4.529 8	0.043 0	0.106 0	0.001 1	0.368 6	1 740	11	1 736	16	1 732	19	1 732	19
9	62		193	0.309 4	0.002 0	4.560 7	0.045 3	0.106 9	0.001 2	0.329 4	1 738	11	1 742	17	1 747	20	1 747	20
10	34		90	0.377 8	0.002 4	6.612 4	0.055 2	0.126 9	0.001 2	0.054 8	2 066	13	2 061	17	2 056	17	2 056	17
11	25		70	0.368 5	0.002 3	6.142 6	0.083 2	0.120 9	0.001 7	0.029 1	2 022	13	1 996	27	1 969	25	1 969	25
12	17		42	0.341 1	0.002 3	5.492 2	0.040 0	0.116 8	0.001 0	1.010 2	1 892	13	1 899	14	1 908	15	1 908	15
13	42		117	0.340 0	0.002 2	5.423 1	0.098 3	0.115 7	0.002 0	0.403 0	1 886	12	1 889	34	1 891	32	1 891	32
14	17		49	0.304 5	0.002 2	4.429 2	0.035 6	0.105 5	0.001 0	0.629 9	1 714	12	1 718	14	1 723	17	1 723	17
15	49		641	0.073 7	0.000 5	0.566 4	0.029 6	0.055 7	0.002 9	0.465 9	459	3	456	24	441	117	459	3
16	11		135	0.073 6	0.000 5	0.561 6	0.111 3	0.055 3	0.010 8	0.593 3	458	3	453	90	425	436	458	3
17	3		54	0.052 9	0.000 7	0.395 4	0.018 1	0.054 2	0.002 5	0.505 2	332	4	338	16	380	105	332	4
18	6		86	0.068 6	0.000 5	0.513 7	0.004 1	0.054 3	0.000 5	0.316 9	428	3	421	3	385	20	428	3
19	23		71	0.305 3	0.001 9	4.546 6	0.371 0	0.108 0	0.008 4	0.428 3	1 717	11	1 740	142	1 766	142	1 766	142
20	7		114	0.049 9	0.000 4	0.359 8	0.002 4	0.052 3	0.000 4	1.140 7	314	3	312	2	297	18	314	3
21	15		286	0.045 8	0.000 3	0.329 0	0.011 3	0.052 1	0.001 8	1.150 5	289	2	289	10	288	79	289	2
22	18		236	0.071 2	0.000 5	0.548 4	0.005 5	0.055 9	0.000 5	0.637 2	443	3	444	4	448	22	443	3
23	39		140	0.236 0	0.001 8	2.851 2	0.022 2	0.087 6	0.000 8	0.974 5	1 366	10	1 369	11	1 374	17	1 374	17
24	37		138	0.241 3	0.001 5	2.970 1	0.020 2	0.089 3	0.000 7	0.732 8	1 393	9	1 400	10	1 410	16	1 410	16
25	96		162	0.494 5	0.003 1	11.848 3	0.118 7	0.173 8	0.001 9	0.943 2	2 590	16	2 592	26	2 594	18	2 594	18
26	44		647	0.071 4	0.000 5	0.551 0	0.005 2	0.056 0	0.000 6	0.179 1	444	3	446	4	452	23	444	3
27	32		66	0.435 8	0.002 8	9.056 1	0.468 2	0.150 7	0.007 8	0.710 9	2 332	15	2 344	121	2 354	88	2 354	88
28	5		70	0.071 6	0.000 5	0.551 3	0.005 4	0.055 9	0.000 6	0.443 4	446	3	446	4	447	23	446	3
29	38		119	0.307 7	0.002 0	4.567 7	0.974 0	0.107 7	0.023 2	0.416 3	1 729	11	1 743	372	1 760	394	1 760	394
30	5		77	0.068 9	0.001 0	0.526 3	0.016 7	0.055 4	0.001 8	0.589 0	429	6	429	14	429	71	429	6
31	12		157	0.071 4	0.000 5	0.548 2	0.005 2	0.055 7	0.000 6	0.503 1	445	3	444	4	440	23	445	3
32	24		48	0.416 0	0.002 7	8.181 3	6.329 2	0.142 6	0.080 7	1.006 7	2 242	15	2 251	1 742	2 260	976	2 260	976
33	3		49	0.053 0	0.000 5	0.389 6	0.003 6	0.053 3	0.000 5	0.423 3	333	3	334	3	344	23	333	3
34	31		82	0.338 0	0.002 1	5.415 1	0.044 0	0.116 2	0.000 9	0.655 4	1 877	12	1 887	15	1 899	14	1 899	14
35	298		549	0.472 6	0.003 9	10.779 6	0.242 6	0.165 4	0.003 7	0.608 8	2 495	20	2 504	56	2 512	38	2 495	38
36	13		168	0.073 6	0.000 5	0.576 3	0.004 0	0.056 8	0.000 5	0.646 8	458	3	462	3	483	18	458	3
37	45		137	0.306 4	0.002 0	4.476 4	0.030 9	0.106 0	0.000 9	0.449 9	1 723	11	1 727	12	1 731	15	1 731	15
38	76		148	0.453 0	0.002 9	9.879 1	0.157 9	0.158 2	0.002 6	0.591 6	2 409	15	2 424	39	2 436	28	2 436	28
39	17		60	0.241 7	0.001 6	3.051 4	0.070 2	0.091 6	0.002 1	0.885 7	1 396	10	1 421	33	1 458	44	1 458	44
40	13		229	0.050 8	0.000 3	0.379 2	0.004 4	0.054 1	0.000 6	0.652 0	320	2	326	4	375	24	320	2
41	19		42	0.365 5	0.003 2	6.207 6	0.185 7	0.123 2	0.003 7	1.478 5	2 008	17	2 006	60	2 003	53	2 003	53
42	5		13	0.337 7	0.002 8	5.348 2	0.150 9	0.114 9	0.003 2	0.751 6	1 875	15	1 877	53	1 878	50	1 878	50
43	17		204	0.071 4	0.000 5	0.549 6	0.005 0	0.055 8	0.000 6	0.983 1	445	3	445	4	445	22	445	3
测点号	w_B/10^-6			同位素比值							年龄/Ma
测点号	Pb	U		²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	Th/U	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	最佳年龄	1σ
44	35		53	0.473 3	0.003 1	10.736 8	0.100 9	0.164 5	0.002 6	1.604 2	2 498	17	2 501	24	2 503	27	2 503	27
45	100		283	0.329 2	0.003 5	5.164 8	0.028 5	0.113 8	0.001 6	0.398 3	1 834	19	1 847	10	1 861	26	1 861	26
46	20		231	0.076 8	0.000 5	0.611 4	0.005 3	0.057 8	0.000 6	0.778 2	477	3	484	4	521	21	477	3
47	28		81	0.308 0	0.001 9	4.551 9	0.722 2	0.107 2	0.011 0	0.630 3	1 731	11	1 740	276	1 752	188	1 752	188
48	4		53	0.071 3	0.000 8	0.550 3	0.193 2	0.056 0	0.020 4	0.565 1	444	5	445	156	451	809	444	5
49	4		73	0.046 3	0.000 6	0.332 8	0.008 4	0.052 2	0.011 2	1.005 7	292	4	292	7	293	492	292	4
50	6		71	0.067 1	0.001 0	0.515 5	0.014 0	0.055 7	0.002 9	1.313 4	419	6	422	11	441	116	419	6
51	19		52	0.300 7	0.007 1	4.337 2	0.153 7	0.104 6	0.006 5	0.867 9	1 695	40	1 700	60	1 708	115	1 708	115
52	9		131	0.053 5	0.000 4	0.396 0	0.023 7	0.053 7	0.003 2	1.066 0	336	2	339	20	358	133	336	2
53	9		107	0.070 6	0.000 6	0.556 3	0.006 3	0.057 1	0.003 4	0.949 8	440	4	449	5	496	131	440	4
54	7		78	0.070 0	0.000 4	0.540 8	0.006 2	0.056 0	0.000 7	0.920 8	436	3	439	5	454	26	436	3
55	20		28	0.418 4	0.002 8	8.199 9	0.118 5	0.142 1	0.009 9	2.279 0	2 253	15	2 253	33	2 253	120	2 253	120
56	3		38	0.070 6	0.000 7	0.561 2	0.004 5	0.057 7	0.000 6	0.728 6	440	4	452	4	517	23	440	4
57	52		148	0.314 7	0.002 2	4.682 9	0.151 3	0.107 9	0.001 4	0.481 3	1 764	12	1 764	57	1 765	24	1 765	24
58	24		161	0.144 9	0.001 0	1.376 6	0.044 2	0.068 9	0.002 2	0.352 1	872	6	879	28	896	67	872	6
59	26		312	0.073 7	0.000 5	0.570 5	0.005 3	0.056 1	0.000 6	0.531 8	458	3	458	4	458	23	458	3
60	56		679	0.071 7	0.000 5	0.555 1	0.003 8	0.056 2	0.000 7	0.819 5	446	3	448	3	460	29	446	3
61	63		95	0.453 8	0.006 2	9.807 6	0.106 1	0.156 7	0.003 9	1.634 7	2 412	33	2 417	26	2 421	42	2 421	42
62	15		193	0.071 3	0.000 5	0.549 7	0.006 9	0.055 9	0.000 8	0.615 0	444	3	445	6	448	30	444	3
63	45		281	0.157 7	0.001 0	1.531 4	0.089 4	0.070 4	0.000 9	0.267 8	944	6	943	55	940	27	944	6
64	138		278	0.454 3	0.005 2	9.782 4	0.107 3	0.156 2	0.001 8	0.331 3	2 414	28	2 414	26	2 415	20	2 415	20

测点号	w_B/10^-6			同位素比值							年龄/Ma
测点号	Pb	U		²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	Th/U	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	最佳年龄	1σ
1	21		285	0.072 0	0.000 5	0.552 2	0.017 8	0.055 7	0.001 8	0.353 3	448	3	446	14	439	71	448	3
2	28		361	0.070 6	0.000 5	0.547 5	0.015 0	0.056 2	0.001 5	0.649 8	440	3	443	12	461	61	440	3
3	22		431	0.049 9	0.000 3	0.365 5	0.006 7	0.053 1	0.001 0	0.399 3	314	2	316	6	334	43	314	2
4	8		24	0.325 1	0.002 2	4.998 7	0.038 6	0.111 5	0.001 0	0.056 3	1 815	12	1 819	14	1 824	16	1 824	16
5	53		154	0.333 9	0.002 1	5.429 2	0.036 4	0.117 9	0.000 9	0.186 7	1 857	12	1 889	13	1 925	14	1 925	14
6	231		707	0.337 4	0.002 2	5.375 8	0.039 8	0.115 5	0.001 0	0.013 5	1 874	12	1 881	14	1 888	15	1 888	15
7	73		204	0.338 0	0.002 2	5.367 6	0.060 3	0.115 2	0.001 4	0.346 6	1 877	12	1 880	21	1 883	22	1 883	22
8	52		159	0.309 8	0.001 9	4.529 8	0.043 0	0.106 0	0.001 1	0.368 6	1 740	11	1 736	16	1 732	19	1 732	19
9	62		193	0.309 4	0.002 0	4.560 7	0.045 3	0.106 9	0.001 2	0.329 4	1 738	11	1 742	17	1 747	20	1 747	20
10	34		90	0.377 8	0.002 4	6.612 4	0.055 2	0.126 9	0.001 2	0.054 8	2 066	13	2 061	17	2 056	17	2 056	17
11	25		70	0.368 5	0.002 3	6.142 6	0.083 2	0.120 9	0.001 7	0.029 1	2 022	13	1 996	27	1 969	25	1 969	25
12	17		42	0.341 1	0.002 3	5.492 2	0.040 0	0.116 8	0.001 0	1.010 2	1 892	13	1 899	14	1 908	15	1 908	15
13	42		117	0.340 0	0.002 2	5.423 1	0.098 3	0.115 7	0.002 0	0.403 0	1 886	12	1 889	34	1 891	32	1 891	32
14	17		49	0.304 5	0.002 2	4.429 2	0.035 6	0.105 5	0.001 0	0.629 9	1 714	12	1 718	14	1 723	17	1 723	17
15	49		641	0.073 7	0.000 5	0.566 4	0.029 6	0.055 7	0.002 9	0.465 9	459	3	456	24	441	117	459	3
16	11		135	0.073 6	0.000 5	0.561 6	0.111 3	0.055 3	0.010 8	0.593 3	458	3	453	90	425	436	458	3
17	3		54	0.052 9	0.000 7	0.395 4	0.018 1	0.054 2	0.002 5	0.505 2	332	4	338	16	380	105	332	4
18	6		86	0.068 6	0.000 5	0.513 7	0.004 1	0.054 3	0.000 5	0.316 9	428	3	421	3	385	20	428	3
19	23		71	0.305 3	0.001 9	4.546 6	0.371 0	0.108 0	0.008 4	0.428 3	1 717	11	1 740	142	1 766	142	1 766	142
20	7		114	0.049 9	0.000 4	0.359 8	0.002 4	0.052 3	0.000 4	1.140 7	314	3	312	2	297	18	314	3
21	15		286	0.045 8	0.000 3	0.329 0	0.011 3	0.052 1	0.001 8	1.150 5	289	2	289	10	288	79	289	2
22	18		236	0.071 2	0.000 5	0.548 4	0.005 5	0.055 9	0.000 5	0.637 2	443	3	444	4	448	22	443	3
23	39		140	0.236 0	0.001 8	2.851 2	0.022 2	0.087 6	0.000 8	0.974 5	1 366	10	1 369	11	1 374	17	1 374	17
24	37		138	0.241 3	0.001 5	2.970 1	0.020 2	0.089 3	0.000 7	0.732 8	1 393	9	1 400	10	1 410	16	1 410	16
25	96		162	0.494 5	0.003 1	11.848 3	0.118 7	0.173 8	0.001 9	0.943 2	2 590	16	2 592	26	2 594	18	2 594	18
26	44		647	0.071 4	0.000 5	0.551 0	0.005 2	0.056 0	0.000 6	0.179 1	444	3	446	4	452	23	444	3
27	32		66	0.435 8	0.002 8	9.056 1	0.468 2	0.150 7	0.007 8	0.710 9	2 332	15	2 344	121	2 354	88	2 354	88
28	5		70	0.071 6	0.000 5	0.551 3	0.005 4	0.055 9	0.000 6	0.443 4	446	3	446	4	447	23	446	3
29	38		119	0.307 7	0.002 0	4.567 7	0.974 0	0.107 7	0.023 2	0.416 3	1 729	11	1 743	372	1 760	394	1 760	394
30	5		77	0.068 9	0.001 0	0.526 3	0.016 7	0.055 4	0.001 8	0.589 0	429	6	429	14	429	71	429	6
31	12		157	0.071 4	0.000 5	0.548 2	0.005 2	0.055 7	0.000 6	0.503 1	445	3	444	4	440	23	445	3
32	24		48	0.416 0	0.002 7	8.181 3	6.329 2	0.142 6	0.080 7	1.006 7	2 242	15	2 251	1 742	2 260	976	2 260	976
33	3		49	0.053 0	0.000 5	0.389 6	0.003 6	0.053 3	0.000 5	0.423 3	333	3	334	3	344	23	333	3
34	31		82	0.338 0	0.002 1	5.415 1	0.044 0	0.116 2	0.000 9	0.655 4	1 877	12	1 887	15	1 899	14	1 899	14
35	298		549	0.472 6	0.003 9	10.779 6	0.242 6	0.165 4	0.003 7	0.608 8	2 495	20	2 504	56	2 512	38	2 495	38
36	13		168	0.073 6	0.000 5	0.576 3	0.004 0	0.056 8	0.000 5	0.646 8	458	3	462	3	483	18	458	3
37	45		137	0.306 4	0.002 0	4.476 4	0.030 9	0.106 0	0.000 9	0.449 9	1 723	11	1 727	12	1 731	15	1 731	15
38	76		148	0.453 0	0.002 9	9.879 1	0.157 9	0.158 2	0.002 6	0.591 6	2 409	15	2 424	39	2 436	28	2 436	28
39	17		60	0.241 7	0.001 6	3.051 4	0.070 2	0.091 6	0.002 1	0.885 7	1 396	10	1 421	33	1 458	44	1 458	44
40	13		229	0.050 8	0.000 3	0.379 2	0.004 4	0.054 1	0.000 6	0.652 0	320	2	326	4	375	24	320	2
41	19		42	0.365 5	0.003 2	6.207 6	0.185 7	0.123 2	0.003 7	1.478 5	2 008	17	2 006	60	2 003	53	2 003	53
42	5		13	0.337 7	0.002 8	5.348 2	0.150 9	0.114 9	0.003 2	0.751 6	1 875	15	1 877	53	1 878	50	1 878	50
43	17		204	0.071 4	0.000 5	0.549 6	0.005 0	0.055 8	0.000 6	0.983 1	445	3	445	4	445	22	445	3
测点号	w_B/10^-6			同位素比值							年龄/Ma
测点号	Pb	U		²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	Th/U	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	最佳年龄	1σ
44	35		53	0.473 3	0.003 1	10.736 8	0.100 9	0.164 5	0.002 6	1.604 2	2 498	17	2 501	24	2 503	27	2 503	27
45	100		283	0.329 2	0.003 5	5.164 8	0.028 5	0.113 8	0.001 6	0.398 3	1 834	19	1 847	10	1 861	26	1 861	26
46	20		231	0.076 8	0.000 5	0.611 4	0.005 3	0.057 8	0.000 6	0.778 2	477	3	484	4	521	21	477	3
47	28		81	0.308 0	0.001 9	4.551 9	0.722 2	0.107 2	0.011 0	0.630 3	1 731	11	1 740	276	1 752	188	1 752	188
48	4		53	0.071 3	0.000 8	0.550 3	0.193 2	0.056 0	0.020 4	0.565 1	444	5	445	156	451	809	444	5
49	4		73	0.046 3	0.000 6	0.332 8	0.008 4	0.052 2	0.011 2	1.005 7	292	4	292	7	293	492	292	4
50	6		71	0.067 1	0.001 0	0.515 5	0.014 0	0.055 7	0.002 9	1.313 4	419	6	422	11	441	116	419	6
51	19		52	0.300 7	0.007 1	4.337 2	0.153 7	0.104 6	0.006 5	0.867 9	1 695	40	1 700	60	1 708	115	1 708	115
52	9		131	0.053 5	0.000 4	0.396 0	0.023 7	0.053 7	0.003 2	1.066 0	336	2	339	20	358	133	336	2
53	9		107	0.070 6	0.000 6	0.556 3	0.006 3	0.057 1	0.003 4	0.949 8	440	4	449	5	496	131	440	4
54	7		78	0.070 0	0.000 4	0.540 8	0.006 2	0.056 0	0.000 7	0.920 8	436	3	439	5	454	26	436	3
55	20		28	0.418 4	0.002 8	8.199 9	0.118 5	0.142 1	0.009 9	2.279 0	2 253	15	2 253	33	2 253	120	2 253	120
56	3		38	0.070 6	0.000 7	0.561 2	0.004 5	0.057 7	0.000 6	0.728 6	440	4	452	4	517	23	440	4
57	52		148	0.314 7	0.002 2	4.682 9	0.151 3	0.107 9	0.001 4	0.481 3	1 764	12	1 764	57	1 765	24	1 765	24
58	24		161	0.144 9	0.001 0	1.376 6	0.044 2	0.068 9	0.002 2	0.352 1	872	6	879	28	896	67	872	6
59	26		312	0.073 7	0.000 5	0.570 5	0.005 3	0.056 1	0.000 6	0.531 8	458	3	458	4	458	23	458	3
60	56		679	0.071 7	0.000 5	0.555 1	0.003 8	0.056 2	0.000 7	0.819 5	446	3	448	3	460	29	446	3
61	63		95	0.453 8	0.006 2	9.807 6	0.106 1	0.156 7	0.003 9	1.634 7	2 412	33	2 417	26	2 421	42	2 421	42
62	15		193	0.071 3	0.000 5	0.549 7	0.006 9	0.055 9	0.000 8	0.615 0	444	3	445	6	448	30	444	3
63	45		281	0.157 7	0.001 0	1.531 4	0.089 4	0.070 4	0.000 9	0.267 8	944	6	943	55	940	27	944	6
64	138		278	0.454 3	0.005 2	9.782 4	0.107 3	0.156 2	0.001 8	0.331 3	2 414	28	2 414	26	2 415	20	2 415	20