南岭金鸡岭岩体锆石U-Pb年龄、地球化学特征及地质意义

李剑锋; 付建明; 马昌前; 卢友月; 程顺波; 马丽艳; 秦拯纬; 盛海琴

doi:10.3799/dqkx.2020.170

南岭金鸡岭岩体锆石U-Pb年龄、地球化学特征及地质意义

doi: 10.3799/dqkx.2020.170

李剑锋^{1, 2, 3, ,},
付建明¹,
马昌前²,
卢友月¹,
程顺波¹,
马丽艳¹,
秦拯纬¹,
盛海琴³

1.
中国地质调查局武汉地质调查中心, 湖北武汉 430205
2.
中国地质大学地球科学学院, 湖北武汉 430074
3.
辽宁师范大学地理科学学院, 辽宁大连 116029

基金项目:

中国地质调查局地质矿产调查评价专项项目 DD20190154

国家重点研发计划重点专项 2016YFC0600205

国家自然科学基金 41902053

详细信息

作者简介:
李剑锋(1986-), 男, 助理研究员, 博士后, 从事花岗岩、矿床学研究工作.ORCID: 0000-0002-1340-320X.E-mail: 317649474@qq.com

中图分类号: P581
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出版历程
- 收稿日期: 2020-05-06
- 刊出日期: 2021-04-15

Zircon U-Pb Ages, Geochemical Characteristics and Geological Significance of Jinjiling Pluton in Nanling

1.
Wuhan Center of China Geological Survey, Wuhan 430205, China
2.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, China
3.
School of Geography, Liaoning Normal University, Dalian 116029, China

摘要

摘要: 对南岭九嶷山地区金鸡岭岩体开展LA-ICP-MS锆石U-Pb年代学研究，结果显示主体粗中粒似斑状正长花岗岩和补体细粒斑状二长花岗岩的成岩年龄分别为156.40±0.66 Ma、153.00±2.20 Ma；结合已有资料将二者的形成时代约束在(156.40±0.66)~(159.00±0.45)Ma与(146.00±0.86)~(153.0±2.2)Ma之间；确定其成岩年代同为燕山早期，也明确了两者的形成顺序.岩石地球化学研究表明，金鸡岭岩体整体具有富硅、碱，贫钙、镁，准铝-过铝质(A/KNC=0.97~1.14)等特点；主体岩性稀土含量较补体明显偏高，分别为488.63×10^-6~571.67×10^-6和166.33×10^-6~275.51×10^-6，(La/Yb)_N分别为10.27~15.84、0.38~1.13；前者稀土元素配分曲线呈右倾轻稀土富集型，而后者则无明显轻、重稀土分馏；两类花岗岩的δEu值都很低，分别为0.049~0.063、0.003~0.007，为铕亏损型；分异指数(DI)为88.76~89.20、90.66~94.06，表明补体发生了更强的岩浆分异作用.金鸡岭岩体富集Rb、K、Th、U、Nd、Hf等大离子高场强元素，亏损Ba、Sr、P、Nb、Ti等元素；Ga/Al(×10⁴)比值为3.32~5.02，平均3.50；Zr+Nb+Ce+Y为255.5×10^-6~554.9×10^-6，平均422.37×10^-6；锆石饱和温度T_Zr=780.31~820.67℃，平均803.77℃；显示A型花岗岩地球化学属性.Sr、Nd、Hf同位素显示金鸡岭岩体具较高Sr同位素初始值(I_Sr=0.712 58~0.732 51)，较低的ε_Nd(t)(-6.2~-7.0)、ε_Hf(t)(-4.2~-5.5)值特点；示踪其源区以地壳物质为主，无地幔/新生陆壳物质贡献；钕、铪二阶段模式年龄十分接近，分别为1 465~1 566 Ma和1 459~1 541 Ma，揭示其源岩从地幔储库中脱离的时间为中元古代.结合南岭地区地质演化史，推测金鸡岭岩体形成的大地构造背景为太平洋板块俯冲引起的陆内伸展环境.
- A型花岗岩 /
- 锆石U-Pb年代学 /
- 同位素地球化学 /
- 构造 /
- 金鸡岭 /
- 南岭
Abstract: A study of LA-ICP-MS zircon U-Pb dating for Jinjiling pluton from Jiuyishan area in Nanling granite belt was carried out. The results show that the diagenetic age of the main medium grained porphyritic syenite and the complement fine-grained porphyritic monzonite are 156.40±0.66 Ma and 153.00±2.20 Ma, respectively. Combined with the existing data, their ages are restricted between (156.40±0.66)-(159.00±0.45) Ma and (146.00±0.86)-(153.00±2.20) Ma, which indicates that the Jinjiling pluton was formed during the early Yanshanian. Geochemical data show that the Jinjiling pluton is characterized by enriched silicone-alkali, depleted calcium-magnesium and metal uminous-peraluminous (A/KNC=0.97-1.14). The content of rare earth elements of the main granite are significantly higher than those of the complement granites, which is 488.63×10^-6-571.67×10^-6and 166.33×10^-6-275.51×10^-6, respectively. The main granite is enriched in light rare earth elements (LREE), with the complement granite having no obvious fractionation, both of which show negative Eu anomalies and (La/Yb)_N values ranging from 10.27 to 15.84 and 0.38 to 1.13, respectively. The differentiation index (DI) are 88.76-89.20, 90.66-94.06, which indicate that the complement granite has undergone stronger magmatic differentiation. The Jinjiling pluton is enriched in large ion lithophile elements (LILE, e.g., Rb, K, Th, U, Nd and Hf) and relatively depleted in high field strength elements (HFSEs, e.g., Ba, Sr, P, Nb and Ti), with Ga/Al(10⁴) ratios of 3.32-5.02 (average 3.50), Zr+Nb+Ce+Y of 255.5×10^-6-554.9×10^-6(average 422.37×10^-6) and zircon saturation temperatures T_Zr of 780.31-820.67℃ (average 803.77℃), similar to geochemical features of A-type granites. The Jinjiling pluton has higher initial Sr isotope values of 0.712 58 to 0.732 51, lower ε_Nd(t) values of -6.2 to -7.0 and ε_Hf(t) values of -4.2 to -5.5, revealing that the source area of the Jinjiling pluton is mainly composed of crustal materials, without any contributions from mantle or new continental crust materials. The model ages of Nd and Hf are relatively close, with 1 465-1 566 Ma and 1 459-1 541 Ma, respectively, suggesting that the source rocks were separated from the mantle reservoir during the Mesoproterozoic. Combined with the geological evolution of Nanling area, it is inferred that the tectonic background of Jinjiling pluton is an intracontinental extensional environment caused by subduction of Pacific plate.
- A-type granite /
- zircon U-Pb dating /
- isotope geochemistry /
- tectonics /
- Jinjiling /
- Nanling

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图 1 九嶷山地区地质简图

图a中，S、M、N分别为南岭南、中、北花岗岩带.图c中，1.白垩系；2.石炭系；3.泥盆系；4.寒武系；5.震旦系；6.志留纪花岗岩；7.中侏罗世花岗岩；8.中侏罗世细粒花岗岩；9.中侏罗世英安/流纹(斑)岩；10.中侏罗统；11.岩相界线；12.地质界线；13.不整合界线；14.断层；15.本次取样位置；16.已有资料

Fig. 1. Simplified geological map of Jiuyishan

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图 2 金鸡岭岩体标本(a~b)与显微照片(c~d)

矿物代码: Kfs.钾长石; Bi.黑云母; Pl.斜长石; Qtz.石英

Fig. 2. Specimen (a-b) and microscopic photos (c-d) of Jinjiling pluton

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图 3 研究区岩浆岩锆石U-Pb年龄谐和图和锆石阴极发光(CL)图像

Fig. 3. Magmatite zircon U-Pb concordia diagrams and CL images in the study area

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图 4 金鸡岭岩体(Na₂O+K₂O)-SiO₂(a)、K₂O-SiO₂图解(b)和A/NK-A/CNK图解(c)

Fig. 4. The (Na₂O+K₂O)-SiO₂ (a)、K₂O-SiO₂ (b) and A/NK-A/CNK diagram (c) of Jinjiling pluton

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图 5 金鸡岭岩体REE配分图(a)和微量元素蛛网图(b)

Fig. 5. Chondrite-normalized REE pattern (a) and primitive mantle-normalized spider diagram (b) of Jinjiling pluton

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图 6 金鸡岭岩体I_Sr-10 000/Sr(a)、I_Sr-SiO₂(b)、ε_Nd(t)-100/Nd(c)和ε_Nd(t)-SiO₂(d)相关图解

Fig. 6. Diagrams of I_Sr-10 000/Sr (a), I_Sr-SiO₂ (b), ε_Nd(t)-100/Nd(c) and ε_Nd(t)-SiO₂(d) variation of Jinjiling pluton

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图 7 金鸡岭岩体ε_Nd(t)-I_Sr(a)、ε_Hf(t)-Age(b)、CaO/(MgO+FeO)-Al₂O₃/(MgO+FeO)(c)及Rb/Sr-Rb/Ba(d)图解

Fig. 7. ε_Nd(t)-I_Sr (a), ε_Hf(t)-Age (b), CaO/(MgO+FeO)-Al₂O₃/(MgO+FeO) (c) and Rb/Sr-Rb/Ba (d) diagrams of Jinjiling pluton

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图 8 金鸡岭岩体10 000 Ga/Al vs. FeO/MgO(a)、10 000 Ga/Al vs. Ce(b)、10 000 Ga/Al vs. (Na₂O+K₂O)/CaO(c)及(Zr+Nb+Ce+Y) vs. FeO/MgO(d)、Nb-Y-Ce(e)及Nb-Y-Ga(f)判别图解(底图据Whalen et al., 1987)

Fig. 8. 10 000 Ga/Al vs. FeO/MgO (a), 10 000 Ga/Al vs. Ce (b), 10 000 Ga/Al vs. (Na₂O+K₂O)/CaO(c), (Zr+Nb+Ce+Y) vs. (FeO/MgO)(d), Nb-Y-Ce (e) and Nb-Y-Ga (f) discrimination diagrams of Jinjiling pluton (after Whalen et al., 1987)

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表 1 研究区岩浆岩锆石LA-ICP-MS U-Pb定年数据

Table 1. LA-ICP-MS magmatite zircon U-Pb dating results in the study area

测点号	Th	U	Th/ U	同位素比值						²⁰⁷Pb/²⁰⁶U		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U
测点号	Th	U	Th/ U	²⁰⁷Pb/²⁰⁶ Pb	σ	²⁰⁷Pb/²³⁵ U	σ	²⁰⁶Pb/²³⁸ U	σ	年龄(Ma)	σ	年龄(Ma)	σ	年龄(Ma)	σ
12D56-2-01	331.4	1 262.2	0.26	0.0512 34	0.002 042	0.165 713	0.005 854	0.023 751	0.000 403	250.1	86.1	155.7	5.1	151.3	2.5
12D56-2-02	348.9	1 144.6	0.30	0.0529 89	0.002 650	0.173 539	0.009 556	0.023 592	0.000 540	327.8	114.8	162.5	8.3	150.3	3.4
12D56-2-03	466.2	726.3	0.64	0.0527 91	0.001 973	0.177 484	0.006 373	0.024 534	0.000 428	320.4	117.6	165.9	5.5	156.2	2.7
12D56-2-04	696.6	1 625.0	0.43	0.0499 11	0.001 351	0.168 398	0.004 307	0.024 644	0.000 312	190.8	63.0	158.0	3.7	156.9	2.0
12D56-2-05	810.3	2 291.7	0.35	0.0515 16	0.003 091	0.179 554	0.009 613	0.025 428	0.000 717	264.9	137.0	167.7	8.3	161.9	4.5
12D56-2-06	554.9	819.7	0.68	0.0527 64	0.002 192	0.175 790	0.007 601	0.024 341	0.000 414	320.4	94.4	164.4	6.6	155.0	2.6
12D56-2-07	528.3	1 506.3	0.35	0.0524 14	0.002 017	0.179 895	0.006 927	0.024 937	0.000 471	301.9	88.9	168.0	6.0	158.8	3.0
12D56-2-09	700.6	1 276.2	0.55	0.0508 77	0.002 424	0.171 105	0.007 680	0.024 449	0.000 510	235.3	111.1	160.4	6.7	155.7	3.2
12D56-2-10	737.8	1 510.1	0.49	0.0508 58	0.001 555	0.171 380	0.005 048	0.024 423	0.000 341	235.3	70.4	160.6	4.4	155.6	2.1
12D56-2-11	406.1	1 078.6	0.38	0.0499 25	0.002 000	0.171 161	0.006 766	0.024 758	0.000 396	190.8	94.4	160.4	5.9	157.7	2.5
12D56-2-12	395.0	626.6	0.63	0.0535 44	0.003 378	0.176 054	0.010 026	0.024 288	0.000 549	350.1	137.9	164.7	8.7	154.7	3.5
12D56-2-14	505.5	857.0	0.59	0.0506 81	0.002 504	0.175 414	0.008 464	0.025 199	0.000 573	233.4	117.6	164.1	7.3	160.4	3.6
12D56-2-15	590.3	1 392.1	0.42	0.0492 43	0.001 737	0.168 730	0.005 991	0.024 715	0.000 342	166.8	81.5	158.3	5.2	157.4	2.2
12D56-2-17	1 273.5	3 596.5	0.35	0.0519 77	0.001 555	0.176 082	0.004 844	0.024 456	0.000 357	283.4	68.5	164.7	4.2	155.8	2.2
12D56-2-19	813.9	2 644.4	0.31	0.0518 32	0.001 584	0.176 025	0.004 953	0.024 652	0.000 391	279.7	70.4	164.6	4.3	157.0	2.5
12D56-2-20	1 086.9	7 966.7	0.14	0.0502 25	0.002 059	0.173 817	0.006 009	0.024 937	0.000 404	205.6	96.3	162.7	5.2	158.8	2.5
17D35-01	336.9	613.1	0.55	0.0461 87	0.002 825	0.155 701	0.008 597	0.024 287	0.000 350	5.7	144.4	146.9	7.6	154.7	2.2
17D35-02	52.8	102.4	0.52	0.0471 12	0.006 481	0.152 120	0.014 984	0.024 112	0.000 733	53.8	300.0	143.8	13.2	153.6	4.6
17D35-03	324.1	477.2	0.68	0.0492 57	0.003 046	0.163 273	0.009 351	0.024 004	0.000 370	166.8	144.4	153.6	8.2	152.9	2.3
17D35-04	353.4	686.1	0.52	0.0486 68	0.003 555	0.164 264	0.012 365	0.024 090	0.000 311	131.6	162.9	154.4	10.8	153.5	2.0
17D35-05	971.5	1 577.3	0.62	0.0462 05	0.002 045	0.164 449	0.006 884	0.025 420	0.000 344	9.4	113.0	154.6	6.0	161.8	2.2
17D35-06	505.8	664.1	0.76	0.0466 26	0.002 826	0.155 546	0.008 633	0.024 115	0.000 394	31.6	137.0	146.8	7.6	153.6	2.5
17D35-07	492.8	862.1	0.57	0.0493 76	0.002 635	0.163 760	0.008 211	0.023 847	0.000 357	164.9	125.9	154.0	7.2	151.9	2.3
17D35-08	127.2	158.0	0.80	0.0511 12	0.005 670	0.158 945	0.014 781	0.023 115	0.000 590	255.6	227.8	149.8	13.0	147.3	3.7
17D35-09	339.1	383.3	0.88	0.0462 27	0.003 469	0.150 412	0.010 709	0.023 315	0.000 506	9.4	179.6	142.3	9.5	148.6	3.2
17D35-10	67.7	121.9	0.56	0.0531 61	0.006 103	0.163 952	0.015 894	0.023 387	0.000 647	344.5	261.1	154.2	13.9	149.0	4.1
17D35-11	48.7	85.6	0.57	0.0566 00	0.009 711	0.174 832	0.023 940	0.024 068	0.000 781	476.0	387.0	163.6	20.7	153.3	4.9
17D35-12	167.9	194.2	0.86	0.0498 86	0.004 321	0.165 135	0.013 311	0.023 396	0.000 463	190.8	198.1	155.2	11.6	149.1	2.9
17D35-13	68.2	116.4	0.59	0.0470 66	0.005 559	0.152 993	0.017 499	0.024 000	0.000 666	53.8	268.5	144.6	15.4	152.9	4.2
17D35-14	675.3	1 216.9	0.55	0.0516 17	0.003 006	0.179 100	0.010 464	0.024 703	0.000 410	333.4	135.2	167.3	9.0	157.3	2.6
17D35-15	81.6	146.2	0.56	0.0465 42	0.004 895	0.143 019	0.012 597	0.022 261	0.000 525	33.4	227.7	135.7	11.2	141.9	3.3
17D35-16	90.3	149.8	0.6	0.0494 53	0.005 396	0.157 529	0.013 580	0.024 356	0.000 650	168.6	237.0	148.5	11.9	155.1	4.1
17D35-17	122.2	200.8	0.61	0.0467 32	0.004 414	0.149 012	0.012 196	0.023 639	0.000 482	35.3	220.3	141.0	10.8	150.6	3.0
17D35-20	77.7	142.3	0.55	0.0532 87	0.004 663	0.172 642	0.012 183	0.023 792	0.000 546	342.7	200.0	161.7	10.5	151.6	3.4

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表 2 金鸡岭岩体主量元素(%)和微量、稀土元素(10^-6)分析数据

Table 2. Major element (%), trace element (10^-6) and rare earth element (10^-6) concentrations of Jinjiling pluton

岩体	金鸡岭							金鸡岭	西山	砂子岭		世界花岗岩*
岩性	细粒斑状二长花岗岩			粗中粒似斑状正长花岗岩				5件	14件	9件	A型	变化范围
样号	12D57	12D58	17D35	12D56-2	12D70	17D11	平均	5件	14件	9件	A型	变化范围
SiO₂	75.03	75.31	75.51	75.3	75.87	76.84	75.64	75.6	70.75	69.54	73.81	60.4~79.8
TiO₂	0.04	0.01	0.05	0.23	0.18	0.25	0.13	0.12	0.44	0.58	0.26	0.04~1.25
Al₂O₃	12.93	13.01	12.47	11.89	11.36	11.10	12.13	12.32	13.40	13.15	12.40	7.30~17.50
Fe₂O₃	0.17	0.05	0.21	0.18	0	0.66	0.21	0.22	0.76	0.39	1.24	0.14~8.70
FeO	1.90	1.97	2.32	2.75	3.33	2.23	2.42	2.22	3.66	4.84	1.58	0.33~6.10
FeO*	2.05	2.01	2.51	2.91	3.33	2.83	2.61	2.42	4.34	5.19
MnO	0.07	0.06	0.04	0.04	0.03	0.04	0.05	0.04	0.06	0.08	0.06	0.01~0.24
MgO	0.23	0.01	0.03	0.18	0.12	0.25	0.14	0.07	0.48	0.74	0.20	< 0.01~0.26
CaO	0.68	0.40	0.67	1.14	1.03	1.13	0.84	0.67	1.79	2.08	0.75	0.08~3.70
Na₂O	3.09	4.36	3.88	2.68	2.77	2.64	3.24	3.08	2.55	2.68	4.07	2.80~6.10
K₂O	4.68	4.57	4.47	5.13	4.91	4.41	4.70	5.08	4.90	4.76	4.65	2.40~6.50
P₂O₅	0.01	0.01	0.01	0.04	0.03	0.06	0.03	0.02	0.16	0.19	0.04	< 0.01~0.46
LOI	0.930	< 0.001	0.070	0.040	< 0.001	0.060	0.280	0.270	0.460	0.080
Total	99.76	99.75	99.73	99.61	99.63	99.68	99.69	99.71	99.42	99.03	99.06
A/CNK	1.14	1.01	1.00	0.99	0.97	0.99	1.02	1.05	1.05	0.99	0.95
Ba	25.70	5.86	8.68	427.00	279.00	215.00	160.21	180.66	944.65	716.31	352.00	2.00~1 530.00
Rb	949.00	1230.00	710.00	150.00	285.00	133.00	576.17	568.32	211.75	223.11	169.00	40.00~475.00
Sr	3.36	2.15	2.28	47.90	30.50	43.20	21.57	25.06	110.89	111.25	48.00	0.50~250.00
Y	155.00	150.00	135.00	53.80	61.00	57.20	102.00	91.98	52.16	45.30	75.00	9.00~190.00
Zr	78.20	62.00	98.80	189.00	211.00	250.00	148.17	142.92	298.81	229.69	528.00	82.00~3 530.00
Nb	52.70	12.00	44.20	19.90	19.10	23.70	28.60	23.35	25.94	22.49	37.00	11.00~348.00
Th	27.10	7.35	34.60	53.70	51.70	73.80	41.38	42.71	29.67	26.25	23.00	< 1.00~87.00
Ga	32.30	28.60	29.40	21.40	30.20	18.90	26.80	22.64	21.40	24.73	24.60	14.00~49.50
Hf	6.92	6.04	6.84	5.88	8.00	7.67	6.89	6.74	8.79	7.06
Ta	20.30	6.14	14.70	1.32	2.43	2.37	7.88	8.20	1.84	2.13
U	25.60	9.42	32.00	6.78	10.90	14.30	16.50	13.79	5.41	5.42	5.00	< 1.00~23.00
FeO^T/MgO	8.84	245.40	80.88	16.33	28.23	11.30	65.16	38.95	12.05	8.43
10 000 Ga/Al	4.72	4.15	4.46	3.40	5.02	3.22	4.16	370.37	516.96	3.55	3.75
Zr+Nb+ Y+Ce	347.40	255.50	348.60	525.70	502.10	554.90	422.37	79.48	2.35	418.36	777.00
Rb/Sr	282.44	572.09	311.40	3.13	9.34	3.08	196.92	6.38	8.65	2.29	7.33
Zr/Hf	11.30	10.26	14.44	32.14	26.38	32.59	21.19	21.22	33.45	32.19
Sm/Nd	0.37	0.46	0.36	0.18	0.19	0.19	0.29	0.26	0.20	0.20	3.75
t_(zr)	820.67	800.72	807.94	811.49	780.31	801.50	803.77	806.95	816.16	785.62	839.00
La	34.30	13.10	30.20	125.00	109.00	103.00	69.10	52.35	67.57	60.76	73.37	31.00~115.80
Ce	61.50	31.50	70.60	263.00	211.00	224.00	143.60	112.12	140.05	120.88	137.00*	18.00~560.00*
Pr	12.90	5.22	10.10	26.30	25.80	22.40	17.12	13.66	16.08	14.67	16.37	6.08~24.8
Nd	48.40	21.30	38.20	95.10	88.90	80.40	62.05	49.82	60.46	53.10	65.55	20.31~99.99
Sm	17.90	9.85	13.60	17.20	17.10	15.00	15.11	11.91	11.82	10.47	15.63	3.96~24.39
Eu	0.12	0.03	0.09	1.00	0.91	0.68	0.47	0.44	1.70	1.81	1.13	0.13~1.58
Gd	16.10	9.70	13.80	14.60	15.60	12.90	13.78	12.45	10.43	9.68	14.24	3.91~27.02
Tb	3.82	2.87	3.44	2.13	2.41	2.02	2.78	2.30	1.62	1.56	2.67	0.64~4.32
Dy	25.20	21.50	23.80	11.80	13.00	11.70	17.83	14.08	9.41	8.74	15.18	3.79~25.33
Ho	5.19	4.60	4.95	2.27	2.53	2.28	3.64	2.91	1.86	1.66	3.60	0.90~5.44
Er	15.80	14.60	14.30	5.98	6.73	6.20	10.60	8.40	5.19	4.60	9.90	2.80~13.10
Tm	3.54	3.38	2.82	0.89	1.15	0.97	2.13	1.41	0.72	0.71	1.56	0.47~1.86
Yb	26.90	24.90	19.20	5.66	7.61	6.24	15.09	9.71	4.79	4.43	10.03	3.28~10.80
Lu	3.84	3.78	2.66	0.74	1.03	0.84	2.15	1.50	0.71	0.64	1.31	0.48~1.57
LREE	175.12	81.00	162.79	527.60	452.71	445.48	307.45	240.3	297.68	261.68	308.67	115.61~410.50
HREE	100.39	85.33	84.97	44.07	50.06	43.15	68.00	52.76	34.72	32.02	58.48	16.27~89.43
(La/Yb)_n	0.91	0.38	1.13	15.84	10.27	11.84	6.73	5.23	10.55	10.11	6.89	3.97~7.72
δEu	0.007	0.003	0.007	0.063	0.056	0.049	0.031	0.030	0.150	0.180	0.220	0.060~0.460
REE	275.51	166.33	247.76	571.67	502.77	488.63	375.45	293.06	332.40	293.70	310.47	131.88~499.93
注：引自Whalen et al*.(1987); 统计148组数据. 稀土资料转刘昌实等(2003); 统计35组数据.

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表 3 金鸡岭岩体Sr-Nd同位素数据

Table 3. Sr-Nd isotopic data of Jinjiling pluton

样号	Rb(10^-6)	Sr(10^-6)	⁸⁷Rb/⁸⁶Sr	⁸⁷Sr/⁸⁶Sr	I_Sr	Sm(10^-6)	Nd(10^-6)	¹⁴⁷Sm/¹³⁴Nd	¹⁴³Nd/¹⁴⁴Nd	ε_Nd(t)	T_DM2(Ma)
12D56-2★	1 109.0	6.537	550.10	1.495 120	0.720 62	16.080	43.69	0.222 7	0.512 339	-6.36	1 532
12D57☆	721.5	5.104	448.80	1.730 350	0.732 51	4.549	12.94	0.212 7	0.512 335	-6.24	1 084
12D58☆	1 187.0	4.839	835.90	2.586 540	0.728 04	9.105	20.86	0.264 1	0.512 361	-6.75	1 513
12D70★	279.0	38.480	21.02	0.762 200	0.715 47	15.280	83.21	0.111 1	0.512 224	-6.38	1 465
D123-1★*	437.9	26.230	48.67	0.822 030	0.713 82	7.350	37.85	0.117 5	0.511 961	-11.63	1 891
D131-1★*	615.1	23.860	75.61	0.880 690	0.712 58	16.150	55.45	0.176 3	0.512 265	-6.86	1 496
D141-1★*	296.6	43.240	19.87	0.759 020	0.714 84	15.240	84.84	0.108 7	0.512 164	-7.49	1 556
D142-1★*	393.1	35.450	32.22	0.787 140	0.715 50	10.720	47.84	0.135 6	0.512 218	-6.98	1 512
JJL-04★^※	555.1	15.300	107.69	0.939 554	0.732 33	13.320	49.72	0.162 0	0.512 275	-7.08	1 389
JJL-07★^※	643.1	17.800	107.08	0.939 870	0.732 07	15.810	64.60	0.148 0	0.512 262	-7.33	1 412
JJL-10★^※	631.0	23.100	80.64	0.897 224	0.732 13	13.540	52.54	0.155 8	0.512 263	-7.32	1 409
JJL-12★^※	601.0	18.100	97.76	0.893 002	0.732 28	13.210	52.57	0.151 9	0.512 254	-7.49	1 424
JJL-17★^※	525.1	20.100	76.72	0.883 109	0.732 18	15.320	69.98	0.132 4	0.512 252	-7.53	1 430
JJL-19★^※	269.4	30.800	25.44	0.762 935	0.732 35	7.380	39.63	0.112 6	0.512 223	-8.1	1 478
JJL-20★^※	346.9	48.200	20.95	0.763 008	0.732 22	12.150	68.17	0.107 8	0.512 216	-8.23	1 489
PXM-01☆^※	897.1	3.200	896.33	1.886 938	0.732 28	6.170	23.29	0.160 2	0.512 238	-7.80	1 448
PXM-03☆^※	891.7	6.300	443.07	1.510 617	0.732 38	9.450	31.95	0.178 8	0.512 322	-6.16	1 310
PXM-05☆^※	1181.2	4.800	789.18	1.839 174	0.732 13	15.420	49.43	0.188 6	0.512 339	-5.83	1 278
注：*4组付建明等(2005)；^※10组苏红中(2017)；☆.螃蟹木，★.金鸡岭.

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表 4 金鸡岭岩体Hf同位素数据

Table 4. Hf isotopic data of Jinjiling pluton

测点号	¹⁷⁶Hf/¹⁷⁷Hf	σ	¹⁷⁶Lu/¹⁷⁷Hf	σ	¹⁷⁶Yb/¹⁷⁷Hf	ε_Hf(0)	Age(Ma)	ε_Hf(t)	2σ	T_DM(Ma)	2σ	T_DM2(Ma)	2σ
17D35-01	0.282 530	0.000 008	0.000 944	0.000 006	0.034 770	-8.6	154.7	-5.3	0.28	1 021	22	1 536	36
17D35-02	0.282 528	0.000 008	0.000 543	0.000 006	0.019 343	-8.6	153.6	-5.3	0.28	1 013	22	1 538	36
17D35-03	0.282 526	0.000 007	0.001 339	0.000 039	0.049 596	-8.7	152.9	-5.5	0.25	1 037	20	1 547	32
17D35-04	0.282 549	0.000 008	0.000 893	0.000 006	0.032 404	-7.9	153.5	-4.6	0.28	993	23	1 494	36
17D35-05	0.282 546	0.000 008	0.001 268	0.000 020	0.048 711	-8.0	161.8	-4.6	0.27	1 006	22	1 496	35
17D35-06	0.282 545	0.000 007	0.001 440	0.000 007	0.054 381	-8.0	153.6	-4.8	0.26	1 013	21	1 506	32
17D35-08	0.282 540	0.000 008	0.000 882	0.000 014	0.031 666	-8.2	147.3	-5.1	0.28	1 005	22	1 516	35
17D35-09	0.282 564	0.000 008	0.000 867	0.000 030	0.032 399	-7.3	148.6	-4.2	0.27	971	22	1 461	34
17D35-10	0.282 543	0.000 009	0.000 637	0.000 007	0.022 653	-8.1	149.0	-4.9	0.30	994	24	1 507	38
17D35-11	0.282 533	0.000 008	0.000 801	0.000 027	0.028 681	-8.4	153.3	-5.2	0.29	1 013	23	1 528	37
17D35-14	0.282 557	0.000 008	0.001 099	0.000 005	0.041 128	-7.6	157.3	-4.3	0.28	987	23	1 474	36
17D35-15	0.282 566	0.000 008	0.000 496	0.000 003	0.017 355	-7.3	141.9	-4.2	0.28	958	22	1 459	36
17D35-16	0.282 526	0.000 008	0.000 573	0.000 005	0.020 078	-8.7	155.1	-5.4	0.27	1 016	21	1 541	34
17D35-17	0.282 538	0.000 008	0.000 572	0.000 003	0.020 286	-8.3	150.6	-5.0	0.27	1 000	21	1 518	34
17D35-20	0.282 551	0.000 007	0.000 549	0.000 001	0.019 250	-7.8	151.6	-4.5	0.25	981	20	1 487	32

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南岭金鸡岭岩体锆石U-Pb年龄、地球化学特征及地质意义

doi: 10.3799/dqkx.2020.170

作者简介:
李剑锋(1986-), 男, 助理研究员, 博士后, 从事花岗岩、矿床学研究工作.ORCID: 0000-0002-1340-320X.E-mail: 317649474@qq.com

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Zircon U-Pb Ages, Geochemical Characteristics and Geological Significance of Jinjiling Pluton in Nanling

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南岭金鸡岭岩体锆石U-Pb年龄、地球化学特征及地质意义

doi: 10.3799/dqkx.2020.170

作者简介: 李剑锋(1986-), 男, 助理研究员, 博士后, 从事花岗岩、矿床学研究工作.ORCID: 0000-0002-1340-320X.E-mail: 317649474@qq.com

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Zircon U-Pb Ages, Geochemical Characteristics and Geological Significance of Jinjiling Pluton in Nanling

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作者简介:
李剑锋(1986-), 男, 助理研究员, 博士后, 从事花岗岩、矿床学研究工作.ORCID: 0000-0002-1340-320X.E-mail: 317649474@qq.com