Zircon U-Pb Geochronology and Geochemistry of Granitic Mylonites in Fengqing, Yunnan Province

doi:10.19657/j.geoscience.1000-8527.2018.04.09

Abstract

Abstract:

Based on field investigations, new data on the geochronology, petrology and geochemistry of the Fengqing granitic mylonites (north of Lincang batholith) located in southern Sanjiang region are presented. LA-ICP-M zircon U-Pb dating of two Fengqing granitic mylonites are yielded Triassic ages of (223.3 ±0.50) Ma, and (231.9 ±1.8) Ma, much younger than the previously conceived Proterozoic age. Geochemical analyses show that the granitic mylonites are peraluminous (A/CNK=1.54-1.75),high-K calc-alkaline, with low Na₂O/K₂O ratio. The rocks are enriched in light rare earth elements (LREE), and depleted in heavy rare earth elements(HREE), with distinct negative Eu anomalies( Eu/Eu^*=0.27-0.58). The rocks contain low Cr and Ni contents, high Rb, Th, U and Sm contents, and low Zr, Hf and Ti contents. The biotite granodioritic mylonite, compared to the younger granopegmatitic mylonite, is more enriched in Ni, Fe, Mg, Ca and REE. This may reflect the products of co-magmatic fractionation. The Fengqing granitic mylonites and Lincang granite are broadly coeval and geochemically similar, and they show a transitional contact of brittle-ductile shearing in the field. This indicated that the granitic mylonite is part of the Lincang granite before shearing in the Lancangjiang fault zone, rather than being the previously-conceived Proterozoic Damenglong high-grade metamorphic rocks.

Key words: zircon U-Pb geochronology, geochemistry, granitic mylonite, Fengqing,Yunnan Province

CLC Number:

P588.1

WANG Hong, CONG Feng, LI Zaihui, WANG Hailin. Zircon U-Pb Geochronology and Geochemistry of Granitic Mylonites in Fengqing, Yunnan Province[J]. Geoscience, 2018, 32(04): 727-738.

Figures/Tables 10

References 26

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序号	测点号	Th/ 10^-6	U/ 10^-6	Th/U	Pb 10^-6	普通铅(²⁰⁷Pb法)校对后同位素比值						普通铅(²⁰⁷Pb法)校对后表生年龄/Ma
序号	测点号	Th/ 10^-6	U/ 10^-6	Th/U	Pb 10^-6	²⁰⁷Pb/ ²⁰⁶Pb	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁶Pb/ ²³⁸U	±1σ
1	P01-1-2	71	235	0.30	91	0.057 84	0.001 5	0.694 04	0.016 6	0.087 05	0.000 7	524	39	535	10	538	4
2	P01-1-5	147	521	0.28	564	0.088 20	0.004 2	2.812 47	0.126 8	0.231 28	0.003 6	1 387	94	1 359	34	1341	19
3	P01-1-8	81	172	0.47	58	0.056 92	0.003 4	0.564 86	0.032 6	0.072 0	0.001 0	488	104	455	21	448	6
4	P01-1-10	121	2 494	0.05	508	0.052 82	0.001 1	0.348 44	0.006 6	0.047 85	0.000 3	321	30	304	5	301	2
5	P01-1-11	96	417	0.23	100	0.055 38	0.001 9	0.418 02	0.013 7	0.054 76	0.000 5	428	56	355	10	344	3
6	P01-1-12	220	210	1.05	137	0.067 86	0.002 1	1.235 91	0.035 3	0.132 13	0.001 2	864	44	817	16	800	7
7	P01-1-14	130	277	0.47	74	0.057 01	0.003 6	0.443 08	0.027 2	0.056 39	0.000 9	492	109	372	19	354	5
8	P01-1-16	259	1 275	0.20	713	0.066 04	0.001 4	1.141 55	0.021	0.125 41	0.000 9	808	26	773	10	762	5
9	P01-1-24	284	1 112	0.25	370	0.059 34	0.001 0	0.611 06	0.008 2	0.074 7	0.000 5	580	18	484	5	464	3
10	P01-1-27	70	342	0.21	156	0.063 81	0.003 7	0.833 84	0.046 8	0.094 77	0.001 2	735	125	616	26	584	7
11	P01-1-1	101	884	0.11	140	0.048 39	0.001 8	0.244 99	0.008 8	0.036 73	0.000 4	118	66	222	7	233	2
12	P01-1-4	90	1 173	0.08	172	0.048 87	0.002 7	0.232 37	0.012 4	0.034 5	0.000 5	142	97	212	10	219	3
13	P01-1-9	100	484	0.21	77	0.051 13	0.003 5	0.258 97	0.017 4	0.036 74	0.000 6	247	126	234	14	233	3
14	P01-1-13	78	564	0.14	89	0.050 63	0.002 9	0.255 22	0.014 3	0.036 57	0.000 4	224	108	231	12	232	3
15	P01-1-15	174	614	0.28	99	0.048 46	0.003 1	0.243 94	0.015 4	0.036 52	0.000 5	122	117	222	13	231	3
16	P01-1-17	113	826	0.14	132	0.050 83	0.003 4	0.258 13	0.016 9	0.036 84	0.000 5	233	124	233	14	233	3
17	P01-1-20	51	607	0.08	94	0.050 97	0.002 8	0.254 49	0.013 4	0.036 22	0.000 4	239	99	230	11	229	3
18	P01-1-26	138	693	0.20	108	0.049 22	0.004 5	0.241 6	0.021 8	0.035 61	0.000 7	158	164	220	18	226	5
19	P01-1-30	35	499	0.07	77	0.050 65	0.003 2	0.250 8	0.015 6	0.035 92	0.000 5	225	116	227	13	227	3
20	P02-2-3	83	382	0.22	67	0.051 38	0.004 07	0.284 27	0.022 1	0.040 14	0.000 6	258	149	254	17	254	4
21	P02-2-4	1 027	282	3.64	299	0.074 32	0.004 27	1.576 75	0.088 38	0.153 94	0.002 87	1 050	83	961	35	923	16
22	P02-2-10	16	568	0.03	233	0.062 14	0.003 32	0.813 85	0.042 1	0.095 02	0.001 42	679	85	605	24	585	8
23	P02-2-11	136	268	0.51	103	0.058 38	0.001 73	0.680 97	0.018 96	0.084 62	0.000 71	544	46	527	11	524	4
24	P02-2-16	59	1 209	0.05	212	0.051 28	0.002 07	0.289 78	0.011 21	0.040 99	0.000 42	253	70	258	9	259	3
25	P02-2-17	2 464	11 710	0.21	2 698	0.054 5	0.001 87	0.394 15	0.012 82	0.052 46	0.000 5	392	56	337	9	330	3
26	P02-2-18	41	191	0.21	77	0.062 12	0.003 57	0.768 58	0.043 04	0.089 76	0.001 34	678	94	579	25	554	8
27	P02-2-19	58	714	0.08	177	0.054 51	0.002 7	0.427 48	0.020 45	0.056 89	0.000 72	392	85	361	15	357	4
28	P02-2-22	196	1 087	0.18	2 668	0.178 97	0.002 88	12.165 72	0.164 10	0.493 01	0.004 34	2643	27	2617	13	2584	19
29	P02-2-23	482	483	1.00	354	0.070 31	0.001 76	1.488 93	0.034 5	0.153 62	0.001 34	937	33	926	14	921	7
30	P02-2-27	53	583	0.09	149	0.055 81	0.003 19	0.456 09	0.025 31	0.059 29	0.000 86	445	98	382	18	371	5
31	P02-2-28	93	334	0.28	191	0.065 65	0.002 11	1.161 55	0.035 45	0.128 35	0.001 32	795	47	783	17	778	8
32	P02-2-32	241	458	0.53	314	0.073 88	0.003 92	1.501 03	0.077 5	0.147 38	0.002 55	1038	76	931	31	886	14
33	P02-2-33	62	211	0.29	67	0.058 44	0.004 63	0.560 2	0.043 49	0.069 54	0.001 29	546	138	452	28	433	8
34	P02-2-35	127	884	0.14	260	0.057 03	0.003 06	0.532 28	0.027 72	0.067 71	0.000 94	493	90	433	18	422	6
35	P02-2-6	172	758	0.23	116	0.050 43	0.004 3	0.243 07	0.020 3	0.034 97	0.000 7	215	154	221	17	222	4
36	P02-2-9	111	740	0.15	108	0.048 05	0.005 2	0.223 17	0.023 8	0.033 7	0.000 8	102	194	205	20	214	5
37	P02-2-12	15	695	0.02	104	0.050 51	0.002 3	0.245 48	0.010 8	0.035 26	0.000 4	219	83	223	9	223	2
38	P02-2-13	17	697	0.02	104	0.049 21	0.003 6	0.238 86	0.017 3	0.035 21	0.000 5	158	134	217	14	223	3
39	P02-2-20	86	1196	0.07	180	0.049 63	0.002 1	0.242 47	0.009 9	0.035 44	0.000 3	178	78	220	8	225	2
40	P02-2-21	45	276	0.16	42	0.049 9	0.003 6	0.242 84	0.017 1	0.035 31	0.000 5	190	135	221	14	224	3
41	P02-2-24	41	401	0.10	61	0.051 16	0.002 5	0.250 38	0.011 8	0.035 5	0.000 4	248	91	227	10	225	2
42	P02-2-25	386	487	0.79	82	0.050 69	0.003 4	0.248 76	0.016 5	0.035 6	0.000 5	227	124	226	13	226	3
43	P02-2-26	90	634	0.14	96	0.052 68	0.003 5	0.256 08	0.016 4	0.035 26	0.000 5	315	118	232	13	223	3
44	P02-2-29	50	543	0.09	81	0.051 17	0.007 4	0.244 17	0.034 7	0.034 62	0.000 9	248	269	222	28	219	6
45	P02-2-31	76	727	0.10	110	0.050 81	0.002 8	0.247 97	0.013 3	0.035 4	0.000 5	232	100	225	11	224	3
46	P02-2-34	207	660	0.31	100	0.054 13	0.003 6	0.259 03	0.016 9	0.034 71	0.000 6	376	119	234	14	220	3

序号	测点号	Th/ 10^-6	U/ 10^-6	Th/U	Pb 10^-6	普通铅(²⁰⁷Pb法)校对后同位素比值						普通铅(²⁰⁷Pb法)校对后表生年龄/Ma
序号	测点号	Th/ 10^-6	U/ 10^-6	Th/U	Pb 10^-6	²⁰⁷Pb/ ²⁰⁶Pb	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁶Pb/ ²³⁸U	±1σ
1	P01-1-2	71	235	0.30	91	0.057 84	0.001 5	0.694 04	0.016 6	0.087 05	0.000 7	524	39	535	10	538	4
2	P01-1-5	147	521	0.28	564	0.088 20	0.004 2	2.812 47	0.126 8	0.231 28	0.003 6	1 387	94	1 359	34	1341	19
3	P01-1-8	81	172	0.47	58	0.056 92	0.003 4	0.564 86	0.032 6	0.072 0	0.001 0	488	104	455	21	448	6
4	P01-1-10	121	2 494	0.05	508	0.052 82	0.001 1	0.348 44	0.006 6	0.047 85	0.000 3	321	30	304	5	301	2
5	P01-1-11	96	417	0.23	100	0.055 38	0.001 9	0.418 02	0.013 7	0.054 76	0.000 5	428	56	355	10	344	3
6	P01-1-12	220	210	1.05	137	0.067 86	0.002 1	1.235 91	0.035 3	0.132 13	0.001 2	864	44	817	16	800	7
7	P01-1-14	130	277	0.47	74	0.057 01	0.003 6	0.443 08	0.027 2	0.056 39	0.000 9	492	109	372	19	354	5
8	P01-1-16	259	1 275	0.20	713	0.066 04	0.001 4	1.141 55	0.021	0.125 41	0.000 9	808	26	773	10	762	5
9	P01-1-24	284	1 112	0.25	370	0.059 34	0.001 0	0.611 06	0.008 2	0.074 7	0.000 5	580	18	484	5	464	3
10	P01-1-27	70	342	0.21	156	0.063 81	0.003 7	0.833 84	0.046 8	0.094 77	0.001 2	735	125	616	26	584	7
11	P01-1-1	101	884	0.11	140	0.048 39	0.001 8	0.244 99	0.008 8	0.036 73	0.000 4	118	66	222	7	233	2
12	P01-1-4	90	1 173	0.08	172	0.048 87	0.002 7	0.232 37	0.012 4	0.034 5	0.000 5	142	97	212	10	219	3
13	P01-1-9	100	484	0.21	77	0.051 13	0.003 5	0.258 97	0.017 4	0.036 74	0.000 6	247	126	234	14	233	3
14	P01-1-13	78	564	0.14	89	0.050 63	0.002 9	0.255 22	0.014 3	0.036 57	0.000 4	224	108	231	12	232	3
15	P01-1-15	174	614	0.28	99	0.048 46	0.003 1	0.243 94	0.015 4	0.036 52	0.000 5	122	117	222	13	231	3
16	P01-1-17	113	826	0.14	132	0.050 83	0.003 4	0.258 13	0.016 9	0.036 84	0.000 5	233	124	233	14	233	3
17	P01-1-20	51	607	0.08	94	0.050 97	0.002 8	0.254 49	0.013 4	0.036 22	0.000 4	239	99	230	11	229	3
18	P01-1-26	138	693	0.20	108	0.049 22	0.004 5	0.241 6	0.021 8	0.035 61	0.000 7	158	164	220	18	226	5
19	P01-1-30	35	499	0.07	77	0.050 65	0.003 2	0.250 8	0.015 6	0.035 92	0.000 5	225	116	227	13	227	3
20	P02-2-3	83	382	0.22	67	0.051 38	0.004 07	0.284 27	0.022 1	0.040 14	0.000 6	258	149	254	17	254	4
21	P02-2-4	1 027	282	3.64	299	0.074 32	0.004 27	1.576 75	0.088 38	0.153 94	0.002 87	1 050	83	961	35	923	16
22	P02-2-10	16	568	0.03	233	0.062 14	0.003 32	0.813 85	0.042 1	0.095 02	0.001 42	679	85	605	24	585	8
23	P02-2-11	136	268	0.51	103	0.058 38	0.001 73	0.680 97	0.018 96	0.084 62	0.000 71	544	46	527	11	524	4
24	P02-2-16	59	1 209	0.05	212	0.051 28	0.002 07	0.289 78	0.011 21	0.040 99	0.000 42	253	70	258	9	259	3
25	P02-2-17	2 464	11 710	0.21	2 698	0.054 5	0.001 87	0.394 15	0.012 82	0.052 46	0.000 5	392	56	337	9	330	3
26	P02-2-18	41	191	0.21	77	0.062 12	0.003 57	0.768 58	0.043 04	0.089 76	0.001 34	678	94	579	25	554	8
27	P02-2-19	58	714	0.08	177	0.054 51	0.002 7	0.427 48	0.020 45	0.056 89	0.000 72	392	85	361	15	357	4
28	P02-2-22	196	1 087	0.18	2 668	0.178 97	0.002 88	12.165 72	0.164 10	0.493 01	0.004 34	2643	27	2617	13	2584	19
29	P02-2-23	482	483	1.00	354	0.070 31	0.001 76	1.488 93	0.034 5	0.153 62	0.001 34	937	33	926	14	921	7
30	P02-2-27	53	583	0.09	149	0.055 81	0.003 19	0.456 09	0.025 31	0.059 29	0.000 86	445	98	382	18	371	5
31	P02-2-28	93	334	0.28	191	0.065 65	0.002 11	1.161 55	0.035 45	0.128 35	0.001 32	795	47	783	17	778	8
32	P02-2-32	241	458	0.53	314	0.073 88	0.003 92	1.501 03	0.077 5	0.147 38	0.002 55	1038	76	931	31	886	14
33	P02-2-33	62	211	0.29	67	0.058 44	0.004 63	0.560 2	0.043 49	0.069 54	0.001 29	546	138	452	28	433	8
34	P02-2-35	127	884	0.14	260	0.057 03	0.003 06	0.532 28	0.027 72	0.067 71	0.000 94	493	90	433	18	422	6
35	P02-2-6	172	758	0.23	116	0.050 43	0.004 3	0.243 07	0.020 3	0.034 97	0.000 7	215	154	221	17	222	4
36	P02-2-9	111	740	0.15	108	0.048 05	0.005 2	0.223 17	0.023 8	0.033 7	0.000 8	102	194	205	20	214	5
37	P02-2-12	15	695	0.02	104	0.050 51	0.002 3	0.245 48	0.010 8	0.035 26	0.000 4	219	83	223	9	223	2
38	P02-2-13	17	697	0.02	104	0.049 21	0.003 6	0.238 86	0.017 3	0.035 21	0.000 5	158	134	217	14	223	3
39	P02-2-20	86	1196	0.07	180	0.049 63	0.002 1	0.242 47	0.009 9	0.035 44	0.000 3	178	78	220	8	225	2
40	P02-2-21	45	276	0.16	42	0.049 9	0.003 6	0.242 84	0.017 1	0.035 31	0.000 5	190	135	221	14	224	3
41	P02-2-24	41	401	0.10	61	0.051 16	0.002 5	0.250 38	0.011 8	0.035 5	0.000 4	248	91	227	10	225	2
42	P02-2-25	386	487	0.79	82	0.050 69	0.003 4	0.248 76	0.016 5	0.035 6	0.000 5	227	124	226	13	226	3
43	P02-2-26	90	634	0.14	96	0.052 68	0.003 5	0.256 08	0.016 4	0.035 26	0.000 5	315	118	232	13	223	3
44	P02-2-29	50	543	0.09	81	0.051 17	0.007 4	0.244 17	0.034 7	0.034 62	0.000 9	248	269	222	28	219	6
45	P02-2-31	76	727	0.10	110	0.050 81	0.002 8	0.247 97	0.013 3	0.035 4	0.000 5	232	100	225	11	224	3
46	P02-2-34	207	660	0.31	100	0.054 13	0.003 6	0.259 03	0.016 9	0.034 71	0.000 6	376	119	234	14	220	3

样品编号		SiO₂			TiO₂				Al₂O₃			Fe₂O₃			MnO			MgO				CaO			Na₂O			K₂O			P₂O₅			烧失量			总量			Na₂O+K₂O					Na₂O/K₂O					A/NK			A/CNK
P01-1		67.90			0.62				14.72			4.30			0.063			2.34				2.62			2.94			2.98			0.18			1.09			99.75			5.92					0.99					2.49			1.72
P01-2		68.54			0.60				14.28			4.07			0.052			2.06				2.44			2.65			3.36			0.18			1.62			99.85			6.01					0.79					2.38			1.69
P01-3		68.63			0.65				14.25			4.36			0.054			2.22				2.08			2.50			3.56			0.19			1.19			99.68			6.06					0.70					2.35			1.75
P01-4		69.06			0.60				14.16			3.94			0.045			1.68				1.96			2.18			4.16			0.20			1.57			99.56			6.34					0.52					2.23			1.71
P02-1		73.62			0.053				14.87			0.91			0.049			0.22				0.63			4.04			4.74			0.053			0.66			99.85			8.78					0.85					1.69			1.58
P02-2		74.66			0.035				14.64			0.54			0.026			0.088				0.60			4.08			4.78			0.047			0.38			99.88			8.86					0.85					1.65			1.55
P02-3		74.68			0.004				14.67			0.38			0.150			0.048				0.38			5.33			3.50			0.063			0.42			99.63			8.83					1.52					1.66			1.59
P02-4		72.56			0.091				14.80			1.28			0.032			0.620				0.46			1.96			7.18			0.058			0.67			99.71			9.14					0.27					1.62			1.54
样品编号	Sc			Rb			Sr			Ba			Zr			Hf			U		Th			Nb			Ta			Cr		Co				Ni			V			Ga		Cs			Pb	Zr/Hf			Rb/Sr			Th/U
P01-1	11.40			295			130.00			832.0			6.52			0.264			1.94		19.70			14.5			1.59			79.800		11.000				25.800			72.40			18.3		55.50			23.6	24.7			2.27			10.15
P01-2	10.60			196			129.00			810.0			6.24			0.218			1.92		19.60			14.3			1.61			77.800		10.200				25.700			62.90			17.5		23.60			28.6	28.62			1.52			10.21
P01-3	12.40			271			128.00			902.0			6.81			0.233			3.31		23.40			16.9			1.60			85.600		9.890				22.400			80.50			19.2		42.20			31.5	29.23			2.12			7.07
P01-4	12.30			233			141.00			1031.0			5.96			0.178			3.53		24.50			17.1			1.77			72.600		8.980				26.700			76.80			20.2		10.40			38.3	33.48			1.65			6.94
P02-1	2.88			300			26.30			78.8			2.83			0.138			2.06		5.10			30.5			6.49			2.130		0.925				2.050			5.21			24.7		15.20			36.3	20.51			11.41			2.48
P02-2	2.83			411			20.70			26.6			1.41			0.065			1.22		3.86			42.1			10.00			0.641		0.166				0.255			1.98			22.7		9.86			40.2	21.69			19.86			3.16
P02-3	0.71			412			9.44			36.7			11.70			0.865			1.66		2.57			95.0			36.30			0.666		0.261				1.080			2.55			32.7		18.60			15.5	13.53			43.64			1.55
P02-4	4.98			338			79.10			51.0			1.26			0.123			3.91		1.85			21.2			8.13			3.510		1.490				2.310			23.40			21.7		24.90			38.6	10.24			4.27			0.47
样品编号	La		Ce			Pr		Nd			Sm			Eu			Gd			Tb			Dy			Ho			Er		Tm		Yb		Y			Lu			∑REE		LREE			HREE			LREE/ HREE			(La/ Yb)_N		δEu
P01-1	39.4		74.3			8.81		34.9			6.54			1.17			5.49			0.885			4.86			0.741			2.15		0.291		1.89		22.2			0.209			181.64		165.12			16.52			10.00			14.09		0.58
P01-2	39.6		73.7			8.75		34.8			6.54			1.12			5.66			0.938			5.17			0.92			2.63		0.372		1.88		26.5			0.261			182.34		164.51			17.83			9.23			14.23		0.55
P01-3	44.01		80.5			9.77		38.9			7.16			1.17			5.60			0.945			4.74			0.815			2.28		0.325		1.95		24.0			0.240			198.40		181.50			16.90			10.74			15.25		0.55
P01-4	46.5		83.8			10.4		40.5			7.64			1.32			6.20			1.070			6.08			0.982			2.63		0.384		2.53		30.1			0.306			210.34		190.16			20.18			9.42			12.42		0.57
P02-1	4.46		7.97			0.972		3.62			1.22			0.145			1.190			0.225			1.46			0.198			0.547		0.155		0.864		7.82			0.089			23.12		18.39			4.73			3.89			3.49		0.36
P02-2	4.04		7.49			0.868		3.15			1.10			0.082			0.693			0.251			1.11			0.158			0.427		0.112		0.585		6.01			0.076			20.14		16.73			3.41			4.90			4.67		0.27
P02-3	0.999		1.92			0.243		0.903			0.529			0.064			0.570			0.180			1.14			0.159			0.306		0.064		0.596		5.89			0.071			7.74		4.66			3.09			1.51			1.13		0.35
P02-4	3.36		5.22			0.636		2.5			0.731			0.415			0.811			0.177			1.23			0.182			0.521		0.102		0.646		5.66			0.117			16.65		12.86			3.79			3.40			3.51		1.64

样品编号		SiO₂			TiO₂				Al₂O₃			Fe₂O₃			MnO			MgO				CaO			Na₂O			K₂O			P₂O₅			烧失量			总量			Na₂O+K₂O					Na₂O/K₂O					A/NK			A/CNK
P01-1		67.90			0.62				14.72			4.30			0.063			2.34				2.62			2.94			2.98			0.18			1.09			99.75			5.92					0.99					2.49			1.72
P01-2		68.54			0.60				14.28			4.07			0.052			2.06				2.44			2.65			3.36			0.18			1.62			99.85			6.01					0.79					2.38			1.69
P01-3		68.63			0.65				14.25			4.36			0.054			2.22				2.08			2.50			3.56			0.19			1.19			99.68			6.06					0.70					2.35			1.75
P01-4		69.06			0.60				14.16			3.94			0.045			1.68				1.96			2.18			4.16			0.20			1.57			99.56			6.34					0.52					2.23			1.71
P02-1		73.62			0.053				14.87			0.91			0.049			0.22				0.63			4.04			4.74			0.053			0.66			99.85			8.78					0.85					1.69			1.58
P02-2		74.66			0.035				14.64			0.54			0.026			0.088				0.60			4.08			4.78			0.047			0.38			99.88			8.86					0.85					1.65			1.55
P02-3		74.68			0.004				14.67			0.38			0.150			0.048				0.38			5.33			3.50			0.063			0.42			99.63			8.83					1.52					1.66			1.59
P02-4		72.56			0.091				14.80			1.28			0.032			0.620				0.46			1.96			7.18			0.058			0.67			99.71			9.14					0.27					1.62			1.54
样品编号	Sc			Rb			Sr			Ba			Zr			Hf			U		Th			Nb			Ta			Cr		Co				Ni			V			Ga		Cs			Pb	Zr/Hf			Rb/Sr			Th/U
P01-1	11.40			295			130.00			832.0			6.52			0.264			1.94		19.70			14.5			1.59			79.800		11.000				25.800			72.40			18.3		55.50			23.6	24.7			2.27			10.15
P01-2	10.60			196			129.00			810.0			6.24			0.218			1.92		19.60			14.3			1.61			77.800		10.200				25.700			62.90			17.5		23.60			28.6	28.62			1.52			10.21
P01-3	12.40			271			128.00			902.0			6.81			0.233			3.31		23.40			16.9			1.60			85.600		9.890				22.400			80.50			19.2		42.20			31.5	29.23			2.12			7.07
P01-4	12.30			233			141.00			1031.0			5.96			0.178			3.53		24.50			17.1			1.77			72.600		8.980				26.700			76.80			20.2		10.40			38.3	33.48			1.65			6.94
P02-1	2.88			300			26.30			78.8			2.83			0.138			2.06		5.10			30.5			6.49			2.130		0.925				2.050			5.21			24.7		15.20			36.3	20.51			11.41			2.48
P02-2	2.83			411			20.70			26.6			1.41			0.065			1.22		3.86			42.1			10.00			0.641		0.166				0.255			1.98			22.7		9.86			40.2	21.69			19.86			3.16
P02-3	0.71			412			9.44			36.7			11.70			0.865			1.66		2.57			95.0			36.30			0.666		0.261				1.080			2.55			32.7		18.60			15.5	13.53			43.64			1.55
P02-4	4.98			338			79.10			51.0			1.26			0.123			3.91		1.85			21.2			8.13			3.510		1.490				2.310			23.40			21.7		24.90			38.6	10.24			4.27			0.47
样品编号	La		Ce			Pr		Nd			Sm			Eu			Gd			Tb			Dy			Ho			Er		Tm		Yb		Y			Lu			∑REE		LREE			HREE			LREE/ HREE			(La/ Yb)_N		δEu
P01-1	39.4		74.3			8.81		34.9			6.54			1.17			5.49			0.885			4.86			0.741			2.15		0.291		1.89		22.2			0.209			181.64		165.12			16.52			10.00			14.09		0.58
P01-2	39.6		73.7			8.75		34.8			6.54			1.12			5.66			0.938			5.17			0.92			2.63		0.372		1.88		26.5			0.261			182.34		164.51			17.83			9.23			14.23		0.55
P01-3	44.01		80.5			9.77		38.9			7.16			1.17			5.60			0.945			4.74			0.815			2.28		0.325		1.95		24.0			0.240			198.40		181.50			16.90			10.74			15.25		0.55
P01-4	46.5		83.8			10.4		40.5			7.64			1.32			6.20			1.070			6.08			0.982			2.63		0.384		2.53		30.1			0.306			210.34		190.16			20.18			9.42			12.42		0.57
P02-1	4.46		7.97			0.972		3.62			1.22			0.145			1.190			0.225			1.46			0.198			0.547		0.155		0.864		7.82			0.089			23.12		18.39			4.73			3.89			3.49		0.36
P02-2	4.04		7.49			0.868		3.15			1.10			0.082			0.693			0.251			1.11			0.158			0.427		0.112		0.585		6.01			0.076			20.14		16.73			3.41			4.90			4.67		0.27
P02-3	0.999		1.92			0.243		0.903			0.529			0.064			0.570			0.180			1.14			0.159			0.306		0.064		0.596		5.89			0.071			7.74		4.66			3.09			1.51			1.13		0.35
P02-4	3.36		5.22			0.636		2.5			0.731			0.415			0.811			0.177			1.23			0.182			0.521		0.102		0.646		5.66			0.117			16.65		12.86			3.79			3.40			3.51		1.64