辽东地区中生代花岗岩的侵位时代：锆石和独居石U-Pb年代学

胡国辉; 张琪琪; 李建锋; 张拴宏

doi:10.3799/dqkx.2020.293

辽东地区中生代花岗岩的侵位时代：锆石和独居石U-Pb年代学

doi: 10.3799/dqkx.2020.293

胡国辉^{1, 2, ,},
张琪琪¹,
李建锋^{1, 2},
张拴宏^{1, 2}

1.
中国地质科学院地质力学研究所, 北京 100081
2.
自然资源部古地磁与古构造重建重点实验室, 北京 100081

基金项目:

国家重点研发计划 2018YFC0603802

详细信息

作者简介:
胡国辉(1984-), 男, 助理研究员, 博士, 从事岩石学、地球化学和年代学方面的研究工作.ORCID:0000-0003-3505-102X.E-mail:huguohui321@126.com

中图分类号: P597
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出版历程
- 收稿日期: 2020-05-31
- 刊出日期: 2020-11-15

Emplacement Ages of Mesozoic Granites in Liaodong Area: Constraints from Zircon and Monazite U-Pb Dating

Hu Guohui^{1, 2
,
,},
Zhang Qiqi¹,
Li Jianfeng^{1, 2},
Zhang Shuanhong^{1, 2}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Ministry of Natural Resources, Beijing 100081, China

摘要

摘要: 辽东地区中生代岩浆活动强烈，伴随着大规模的金成矿作用.五龙金矿是该地区规模最大的典型石英脉型金矿床，金矿体主要赋存于侏罗纪片麻状花岗岩和早白垩世花岗闪长岩中.因此，该地区中生代岩浆活动对金成矿作用具有显著的制约.选择辽东五龙金矿区片麻状花岗岩和三股流岩体进行岩相学、锆石和独居石U-Pb年代学研究.3个片麻状花岗岩的岩性均为黑云母二长花岗岩，矿物发生强烈的韧性变形，呈定向排列，锆石U-Pb年龄分别为159.2±1.8 Ma、160.2±1.8 Ma和156.1±1.2 Ma，三股流黑云母二长花岗岩样品的锆石U-Pb年龄为123.8±1.2 Ma.花岗岩样品中的独居石矿物学特征和化学组成显示均为岩浆成因，3个片麻状花岗岩的独居石年龄分别为158.1±1.9 Ma、157.5±1.4 Ma和153.5±1.4 Ma，三股流岩体的独居石U-Pb年龄为123.4±1.5 Ma.晚侏罗世片麻状花岗岩的独居石年龄比锆石年龄略小1.1~2.7 Ma，其中2个样品的冷却速率分别为55.56℃/Ma和57.69℃/Ma，表明晚侏罗世岩浆在高温阶段为一快速冷却作用过程，可能经历了快速的地壳抬升事件.锆石和独居石的U-Pb年龄结果表明片麻状花岗岩和三股流岩体分别形成于侏罗纪晚期和白垩纪早期，结合已有研究资料，辽东五龙矿集区主要发生了晚侏罗世和早白垩世两期岩浆活动，与古太平洋板块向欧亚大陆俯冲作用有关，并伴随着早白垩世金矿的形成.
- 辽东 /
- 中生代花岗岩 /
- 锆石和独居石U-Pb定年 /
- 金矿 /
- 地质年代学
Abstract: The Mesozoic magmatic activities extensively developed in East Liaoning Province accompanied by large-scale gold mineralization. Wulong gold deposit is a representative largest quartz-vein type gold deposit,and the gold ore bodies mainly hosted in Jurassic gneiss biotite granite and Early Cretaceous granodiorite. Therefore,Mesozoic magmatism has a significant genetic relation with the gold mineralization. In this paper,it presents zircon and monazite U-Pb dating of gneiss granite and Sanguliu rock mass in Wulong gold ore-concentrated district to constrain their emplacement ages. The gneiss granite is dominated by biotite monzogranite,the minerals of which show strong ductile deformation and are oriented. Their zircon U-Pb ages are 159.2±1.8 Ma,160.2±1.8 Ma,and 156.1±1.2 Ma,respectively. Zircons from Sanguliu biotite monzogranite yield a U-Pb age of 123.8±1.2 Ma. Mineralogical characteristics and chemical compositions of monazites from four granitic samples suggest a magmatic origin. New LA-ICP-MS dating of monazites from three gneiss granite samples yielded U-Pb ages of 158.1±1.9 Ma,157.5±1.4 Ma,and 153.5±1.4 Ma,respectively,and 123.4±1.5 Ma for Sanguliu biotite monzogranite. Monazite ages of Late Jurassic gneiss granite are 1.1-2.7 Ma younger than their zircon ages,two of which have high cooling rate of 55.56℃/Ma and 57.69℃/Ma,suggesting a rapid cooling process and crustal uplift. Both zircon and monazite U-Pb ages indicate that the gneiss granite and Sanguliu rock mass formed during Late Jurassic and Early Cretaceous,respectively. In combination with the available data,Wulong gold ore-concentrated district mainly developed Late Jurassic and Early Cretaceous magmatic activities,which were closely related to the subduction of Paleo-Pacific plate to Eurasia continent,accompanied by Early Cretaceous gold mineralization.
- East Liaoning Province /
- Mesozoic granite /
- zircon and monazite U-Pb dating /
- gold deposit /
- geochronology

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图 1 辽东地区五龙金矿区地质简图

据辽宁有色丹东地质勘察院，2004.辽宁省丹东市五龙金矿田区域地质图（1:50 000）

Fig. 1. Simplified geological map of Wulong gold field, Liaodong area

下载: 全尺寸图片幻灯片

图 2 五龙金矿区中生代花岗岩的正交偏光显微照片

a, b.晚侏罗世花岗岩，片麻状构造，石英压扁、拉长定向，局部呈塑性条带；c.早白垩世花岗岩，弱片麻状构造，石英压扁、破碎、粒状，黑云母弯曲变形；d.晚侏罗世花岗岩，片麻状构造，石英压扁、破碎，黑云母发生弯曲变形，定向排列. Q.石英；Kfs.钾长石；Pl.斜长石；Bt.黑云母

Fig. 2. The cross-polarized light micrographs of the Mesozoic granites in Wulong gold field

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图 3 五龙金矿区中生代花岗岩锆石CL图像

红色数字为分析点号

Fig. 3. Representative CL images for zircons from the Mesozoic granites in Wulong gold field

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图 4 五龙金矿区中生代花岗岩锆石U-Pb年龄谐和图

Fig. 4. U-Pb Concordia diagrams for zircons from the Mesozoic granites in Wulong gold field

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图 5 五龙金矿区中生代花岗岩独居石BSE图像

红色数字为分析点号

Fig. 5. Representative BSE images for monazites from the Mesozoic granites in Wulong gold field

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图 6 五龙金矿区中生代花岗岩独居石U-Pb年龄谐和图

Fig. 6. U-Pb concordia diagrams for monazites from the Mesozoic granites in Wulong gold field

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图 7 五龙金矿区中生代花岗岩独居石的球粒陨石标准化稀土配分曲线

球粒陨石标准化值据Sun and McDonough（1989）

Fig. 7. Chondrite-normalized REE patterns of monazites from the Mesozoic granites in Wulong gold field

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表 1 五龙金矿区中生代花岗岩的锆石LA-ICP-MS U-Pb年龄分析结果

Table 1. LA-ICP-MS U-Pb dating results for zircons from the Mesozoic granites in Wulong gold field

分析点号	²³²Th（10^-6）	²³⁸U（10^-6）	Th/U	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²⁰⁶Pb (Ma)		²⁰⁷Pb/²³⁵U (Ma)		²⁰⁶Pb/²³⁸U (Ma)
分析点号	²³²Th（10^-6）	²³⁸U（10^-6）	Th/U	比值	±1σ	比值	±1σ	比值	±1σ	年龄	±1σ	年龄	±1σ	年龄	±1σ
19LD233-1
1	142	144	0.98	0.050 0	0.004 2	0.165 8	0.012 0	0.024 6	0.000 4	195	194	156	10	157	3
2	143	146	0.97	0.054 1	0.004 3	0.191 0	0.013 9	0.026 0	0.000 6	372	178	178	12	166	4
3	129	669	0.19	0.048 7	0.001 9	0.166 3	0.006 4	0.024 6	0.000 3	200	89	156	6	157	2
4	97	85	1.14	0.053 1	0.005 5	0.185 6	0.017 5	0.025 6	0.000 6	332	237	173	15	163	4
5	599	234	2.54	0.053 7	0.003 5	0.174 8	0.010 6	0.023 9	0.000 4	367	144	164	9	153	2
6	48	94	0.51	0.057 3	0.005 4	0.198 4	0.015 5	0.026 6	0.000 6	502	209	184	13	169	4
7	157	819	0.19	0.049 3	0.001 8	0.166 7	0.006 0	0.024 6	0.000 3	161	92	157	5	156	2
8	189	202	0.93	0.051 2	0.003 2	0.175 3	0.010 6	0.025 2	0.000 5	250	144	164	9	160	3
9	50	189	0.26	0.050 3	0.002 8	0.167 9	0.009 0	0.024 5	0.000 4	206	127	158	8	156	3
10	188	237	0.79	0.046 8	0.003 0	0.160 3	0.009 3	0.025 3	0.000 5	39	148	151	8	161	3
11	100	110	0.90	0.050 4	0.004 1	0.177 9	0.012 5	0.025 5	0.000 6	213	191	166	11	162	4
12	112	677	0.16	0.046 8	0.001 6	0.164 6	0.005 7	0.025 4	0.000 3	39	81	155	5	162	2
13	308	784	0.39	0.047 2	0.001 6	0.160 6	0.005 4	0.024 6	0.000 3	58	143	151	5	156	2
14	26	38	0.69	0.052 2	0.005 6	0.324 2	0.027 9	0.045 2	0.001 4	300	244	285	21	285	9
15	82	97	0.84	0.051 3	0.005 2	0.171 9	0.014 9	0.025 2	0.000 7	257	36	161	13	160	4
16	211	150	1.40	0.081 6	0.006 4	0.274 9	0.021 3	0.024 6	0.000 5	1 236	155	247	17	157	3
17	113	86	1.30	0.051 5	0.004 6	0.169 3	0.013 1	0.025 1	0.000 6	261	206	159	11	160	4
18	171	249	0.68	0.052 7	0.003 1	0.185 9	0.009 5	0.026 5	0.000 5	322	142	173	8	168	3
19	81	75	1.07	0.048 9	0.004 6	0.175 2	0.016 1	0.026 0	0.000 6	143	207	164	14	165	4
20	130	101	1.27	0.050 4	0.003 9	0.169 5	0.011 3	0.024 9	0.000 5	213	175	159	10	158	3
21	428	1 715	0.25	0.050 3	0.001 4	0.179 2	0.005 1	0.025 8	0.000 4	209	63	167	4	164	2
22	282	221	1.27	0.049 4	0.003 0	0.165 3	0.009 8	0.024 3	0.000 4	165	144	155	9	155	3
23	116	128	0.90	0.051 7	0.004 8	0.172 3	0.014 0	0.025 1	0.000 5	333	211	161	12	160	3
24	60	80	0.75	0.053 8	0.006 2	0.176 4	0.016 8	0.025 1	0.000 7	361	266	165	14	160	4
25	219	1 286	0.17	0.108 7	0.002 4	1.306 0	0.056 0	0.084 8	0.002 6	1 777	40	848	25	524	16
19LD234-1
1	164	1 232	0.13	0.049 9	0.001 4	0.188 9	0.005 7	0.027 5	0.000 4	191	67	176	5	175	3
2	107	91	1.16	0.055 8	0.005 5	0.189 4	0.016 6	0.025 6	0.000 6	443	220	176	14	163	4
3	133	152	0.87	0.113 4	0.002 3	4.993 3	0.102 8	0.318 8	0.003 1	1 855	37	1 818	17	1 784	15
4	86	829	0.10	0.112 5	0.001 9	3.503 5	0.059 2	0.225 2	0.001 9	1 840	30	1 528	13	1 309	10
5	85	96	0.87	0.051 9	0.005 3	0.171 2	0.014 0	0.025 2	0.000 5	280	232	160	12	160	3
6	267	656	0.40	0.150 4	0.002 4	7.388 6	0.129 1	0.354 5	0.003 2	2 350	27	2 160	16	1 956	15
7	56	49	1.14	0.075 9	0.009 1	0.349 6	0.036 8	0.034 9	0.001 1	1 092	243	304	28	221	7
8	64	574	0.11	0.050 4	0.001 9	0.175 8	0.006 2	0.025 4	0.000 3	213	87	164	5	162	2
9	244	1 079	0.22	0.049 1	0.001 7	0.168 9	0.005 8	0.025 0	0.000 4	150	77	158	5	159	3
10	197	1 574	0.12	0.050 3	0.001 4	0.180 0	0.005 6	0.025 9	0.000 4	209	67	168	5	165	3
11	91	163	0.56	0.050 8	0.003 2	0.206 0	0.011 6	0.030 1	0.000 6	235	144	190	10	191	4
12	222	275	0.80	0.050 8	0.002 8	0.180 4	0.009 8	0.026 2	0.000 5	232	128	168	8	167	3
13	39	520	0.07	0.050 3	0.002 1	0.168 3	0.006 3	0.024 6	0.000 3	209	96	158	5	156	2
14	56	419	0.13	0.052 4	0.002 1	0.176 5	0.006 8	0.024 5	0.000 3	302	91	165	6	156	2
15	297	1 843	0.16	0.049 0	0.001 2	0.168 7	0.004 0	0.024 8	0.000 3	150	56	158	3	158	2
16	211	250	0.84	0.050 7	0.002 8	0.174 2	0.009 7	0.024 8	0.000 4	228	125	163	8	158	2
17	74	1 736	0.04	0.052 8	0.001 1	0.223 9	0.004 6	0.030 6	0.000 3	320	48	205	4	194	2
18	134	244	0.54	0.052 5	0.002 7	0.187 3	0.009 7	0.025 9	0.000 4	306	119	174	8	165	3
19	91	82	1.10	0.047 3	0.004 4	0.161 4	0.013 4	0.024 9	0.000 6	61	211	152	12	159	4
20	119	225	0.53	0.145 3	0.003 3	3.932 5	0.120 8	0.194 1	0.004 2	2 292	40	1 620	25	1 144	23
21	84	1 250	0.07	0.049 8	0.001 5	0.177 0	0.005 9	0.025 7	0.000 4	183	66	165	5	163	3
22	168	777	0.22	0.049 1	0.001 6	0.170 5	0.006 0	0.025 1	0.000 4	154	78	160	5	160	2
23	54	596	0.09	0.050 7	0.001 8	0.239 4	0.008 3	0.034 2	0.000 4	228	83	218	7	216	2
24	123	329	0.37	0.110 2	0.001 9	3.456 3	0.067 7	0.226 0	0.002 7	1 802	31	1 517	15	1 313	14
25	52	611	0.09	0.050 7	0.001 9	0.177 6	0.006 9	0.025 3	0.000 4	228	61	166	6	161	2
19LD244-1
1	1 225	4 036	0.30	0.046 8	0.001 0	0.124 1	0.002 8	0.019 1	0.000 2	39	48	119	3	122	1
2	1 334	3 931	0.34	0.049 7	0.001 2	0.130 8	0.003 0	0.019 1	0.000 3	189	56	125	3	122	2
3	1 499	1 104	1.35	0.058 3	0.001 8	0.162 6	0.005 0	0.020 2	0.000 3	543	67	153	4	129	2
4	836	2 310	0.36	0.064 0	0.002 4	0.181 4	0.008 3	0.020 0	0.000 3	743	80	169	7	127	2
5	1 316	3 226	0.40	0.049 8	0.001 2	0.135 2	0.003 5	0.019 5	0.000 2	187	57	129	3	124	1
6	111	56	1.95	0.051 6	0.007 1	0.125 8	0.013 6	0.018 9	0.000 6	333	233	120	12	121	4
7	2 226	3 609	0.61	0.049 2	0.001 1	0.130 5	0.003 1	0.019 2	0.000 3	167	50	125	3	122	2
8	184	201	0.91	0.051 4	0.004 0	0.136 2	0.009 0	0.019 8	0.000 4	257	175	130	8	127	2
9	1 202	816	1.46	0.050 5	0.001 8	0.134 4	0.004 9	0.019 3	0.000 3	217	83	128	4	123	2
10	425	306	1.38	0.052 5	0.003 2	0.135 2	0.007 2	0.019 2	0.000 3	309	139	129	6	122	2
11	492	394	1.24	0.054 2	0.002 8	0.140 3	0.006 5	0.019 1	0.000 3	376	121	133	6	122	2
12	775	602	1.28	0.047 0	0.002 1	0.130 6	0.006 0	0.020 4	0.000 4	56	98	125	5	130	2
13	1 081	736	1.46	0.049 4	0.002 2	0.128 2	0.005 3	0.019 0	0.000 3	165	104	123	5	121	2
14	1 433	3 103	0.46	0.047 8	0.001 1	0.126 4	0.003 1	0.019 1	0.000 2	100	56	121	3	122	1
15	93	82	1.14	0.046 6	0.005 2	0.124 8	0.011 6	0.020 0	0.000 5	33	243	119	11	127	3
16	1 181	1 112	1.05	0.049 0	0.001 7	0.130 1	0.004 7	0.019 2	0.000 2	146	84	124	4	122	1
17	306	287	1.06	0.050 7	0.003 0	0.130 9	0.007 1	0.019 1	0.000 3	233	142	125	6	122	2
18	130	171	0.75	0.056 6	0.004 3	0.147 0	0.010 1	0.019 2	0.000 4	476	168	139	9	123	2
19	677	1 392	0.48	0.047 5	0.001 4	0.125 7	0.003 7	0.019 1	0.000 2	76	127	120	3	122	1
20	537	641	0.83	0.048 1	0.002 1	0.134 8	0.006 2	0.020 3	0.000 4	102	109	128	6	130	2
21	126	71	1.77	0.166 3	0.012 6	0.540 9	0.042 5	0.023 5	0.000 7	2 521	127	439	28	150	5
22	45	689	0.06	0.048 7	0.002 0	0.135 4	0.005 4	0.020 3	0.000 4	132	101	129	5	130	2
23	1 122	2 294	0.49	0.047 4	0.001 2	0.125 4	0.003 2	0.019 1	0.000 2	78	57	120	3	122	1
4	547	403	1.35	0.047 3	0.002 2	0.131 3	0.006 1	0.020 2	0.000 3	65	107	125	5	129	2
25	205	265	0.77	0.046 3	0.003 1	0.120 1	0.007 3	0.019 3	0.000 4	13	152	115	7	123	2
19LD254-1
1	288	780	0.37	0.107 9	0.001 8	3.091 7	0.051 7	0.206 6	0.001 6	1 765	3	1 431	13	1 211	9
2	531	1 425	0.37	0.054 4	0.001 4	0.220 6	0.006 6	0.029 2	0.000 5	387	57	202	6	185	3
3	712	666	1.06	0.052 2	0.001 7	0.256 3	0.008 1	0.035 5	0.000 3	300	74	232	7	225	2
4	112	110	1.02	0.052 9	0.003 8	0.257 3	0.018 1	0.035 2	0.001 0	324	165	233	15	223	6
5	198	506	0.39	0.048 6	0.002 4	0.166 0	0.008 4	0.024 7	0.000 4	128	115	156	7	157	3
6	149	179	0.82	0.055 8	0.003 3	0.184 6	0.010 7	0.024 5	0.000 5	443	133	172	9	156	3
7	442	1 519	0.29	0.050 1	0.001 4	0.171 4	0.004 8	0.024 8	0.000 3	211	32	161	4	158	2
8	30	41	0.73	0.067 0	0.007 9	0.228 6	0.021 5	0.026 1	0.001 0	839	281	209	18	166	6
9	35	58	0.60	0.162 6	0.003 3	10.003 3	0.206 2	0.445 1	0.004 4	2 483	33	2 435	19	2 373	20
10	411	1 650	0.25	0.122 4	0.002 0	3.253 6	0.094 9	0.191 6	0.004 7	1 992	29	1 470	23	1 130	26
11	197	1 380	0.14	0.125 9	0.002 1	4.022 0	0.168 5	0.226 8	0.008 2	2 043	29	1 639	34	1 318	43
12	158	672	0.23	0.050 8	0.001 7	0.201 1	0.006 8	0.028 7	0.000 4	232	76	186	6	182	2
13	216	705	0.30	0.049 0	0.001 5	0.166 3	0.005 0	0.024 6	0.000 3	150	70	156	4	156	2
14	110	297	0.37	0.051 7	0.002 4	0.227 6	0.010 2	0.032 1	0.000 4	272	107	208	8	203	3
15	299	491	0.60	0.050 9	0.001 7	0.257 8	0.008 6	0.036 6	0.000 4	239	78	233	7	232	2
16	73	86	0.85	0.050 5	0.004 1	0.171 5	0.012 3	0.025 1	0.000 5	220	187	161	11	160	3
17	168	1 521	0.11	0.057 6	0.001 4	0.194 0	0.004 5	0.024 3	0.000 2	517	54	180	4	155	1
18	1 130	2 723	0.41	0.051 3	0.001 0	0.245 4	0.004 8	0.034 5	0.000 3	254	46	223	4	219	2
19	265	771	0.34	0.122 7	0.002 1	5.289 9	0.089 9	0.310 5	0.002 1	1 995	32	1 867	15	1 743	10
20	40	85	0.47	0.057 7	0.005 5	0.220 3	0.016 8	0.029 3	0.000 8	517	214	202	14	186	5
21	214	845	0.25	0.048 5	0.001 4	0.163 4	0.004 7	0.024 4	0.000 3	124	70	154	4	155	2
22	186	1 224	0.15	0.049 9	0.001 3	0.168 5	0.004 4	0.024 4	0.000 2	191	61	158	4	155	1
23	234	813	0.29	0.049 7	0.001 4	0.220 2	0.008 2	0.031 9	0.000 6	189	73	202	7	202	4
24	419	2 084	0.20	0.049 9	0.001 1	0.172 3	0.004 5	0.024 9	0.000 4	191	21	161	4	159	2
25	228	1 995	0.11	0.091 4	0.004 4	0.451 9	0.025 9	0.034 2	0.000 5	1 457	91	379	18	217	3

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表 2 五龙金矿区中生代花岗岩的独居石LA-ICP-MS U-Pb年龄分析结果

Table 2. LA-ICP-MS U-Pb dating results for monazites from the Mesozoic granites in Wulong gold field

分析点号	²³²Th （10^-6）	²³⁸U （10^-6）	Th/U	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²⁰⁶Pb (Ma)		²⁰⁷Pb/²³⁵U (Ma)		²⁰⁶Pb/²³⁸U (Ma)
分析点号	²³²Th （10^-6）	²³⁸U （10^-6）	Th/U	比值	±1σ	比值	±1σ	比值	±1σ	年龄	±1σ	年龄	±1σ	年龄	±1σ
19LD233-1
1	30 646	811	37.5	0.051 0	0.004 5	0.171 0	0.014 6	0.024 5	0.000 4	243	199	160	13	156	3
2	40 448	620	64.8	0.051 6	0.004 1	0.163 0	0.011 5	0.023 8	0.000 4	333	183	153	10	151	3
3	37 087	542	67.9	0.047 4	0.003 4	0.155 0	0.009 5	0.024 2	0.000 5	78	154	146	8	154	3
4	61 796	888	69.1	0.047 3	0.003 5	0.159 1	0.011 3	0.024 9	0.000 4	61	170	150	10	158	3
5	39 115	565	68.8	0.049 1	0.004 0	0.171 3	0.012 8	0.025 6	0.000 5	154	191	161	11	163	3
6	34 301	435	78.3	0.046 5	0.004 8	0.158 6	0.016 5	0.025 6	0.000 6	33	224	149	14	163	4
7	20 837	435	47.5	0.054 5	0.005 5	0.178 8	0.015 7	0.024 5	0.000 6	391	231	167	13	156	4
8	34 500	486	70.5	0.052 6	0.004 4	0.175 1	0.013 4	0.024 4	0.000 5	322	193	164	12	156	3
9	31 123	78	398	0.104 4	0.031 3	0.261 9	0.039 4	0.027 6	0.001 3	1 703	578	236	32	176	8
10	30 310	582	51.7	0.070 9	0.005 1	0.240 9	0.015 5	0.024 9	0.000 5	955	53	219	13	158	3
11	38 067	848	44.6	0.048 1	0.003 5	0.157 5	0.010 0	0.024 3	0.000 4	102	231	149	9	155	2
12	50 446	411	122	0.055 5	0.004 9	0.177 0	0.013 2	0.024 0	0.000 5	432	200	165	11	153	3
13	49 745	854	57.8	0.046 3	0.003 0	0.162 0	0.009 1	0.025 3	0.000 4	13	152	152	8	161	2
14	31 008	370	83.3	0.053 0	0.004 6	0.176 6	0.013 5	0.025 0	0.000 6	328	203	165	12	159	4
15	58 855	1316	44.4	0.051 3	0.002 9	0.182 4	0.009 2	0.025 9	0.000 4	254	134	170	8	165	3
16	31 477	565	55.3	0.049 2	0.004 6	0.165 4	0.013 5	0.024 8	0.000 5	167	194	155	12	158	3
17	29 256	508	57.2	0.051 3	0.004 0	0.175 9	0.012 5	0.025 1	0.000 4	254	186	165	11	160	3
18	41 224	579	70.7	0.050 2	0.004 4	0.170 8	0.014 1	0.024 6	0.000 5	211	183	160	12	157	3
19	42 894	228	186	0.054 9	0.006 5	0.175 1	0.015 5	0.025 4	0.000 7	409	267	164	13	162	5
20	35 511	527	66.9	0.052 6	0.005 1	0.181 7	0.016 6	0.025 4	0.000 5	322	220	169	14	162	3
19LD234-1
1	24 902	538	46.0	0.105 4	0.007 1	0.401 0	0.026 9	0.027 2	0.000 5	1 722	125	342	19	173	3
2	31 582	996	31.5	0.051 5	0.003 9	0.172 8	0.011 8	0.024 5	0.000 4	265	176	162	10	156	2
3	42 947	915	46.6	0.050 2	0.003 2	0.173 1	0.009 9	0.024 7	0.000 4	211	145	162	9	158	3
4	30 765	566	53.9	0.047 5	0.004 1	0.155 5	0.011 6	0.024 3	0.000 4	72	261	147	10	155	3
5	32 397	545	59.0	0.056 1	0.005 0	0.175 3	0.012 6	0.024 0	0.000 6	457	193	164	11	153	4
6	54 469	1 115	48.5	0.051 5	0.003 7	0.165 5	0.010 4	0.024 2	0.000 4	265	160	156	9	154	3
7	26 913	403	66.3	0.075 6	0.013 7	0.300 1	0.054 5	0.028 9	0.000 7	1 085	369	266	43	184	4
8	35 264	898	39.0	0.051 3	0.003 3	0.174 6	0.008 9	0.025 1	0.000 4	257	148	163	8	160	3
9	35 041	637	54.6	0.084 8	0.005 9	0.296 4	0.016 4	0.026 0	0.000 5	1 322	134	264	13	166	3
10	33 088	699	47.0	0.051 1	0.003 8	0.177 0	0.010 9	0.025 4	0.000 5	256	172	166	9	162	3
11	42 867	447	95.2	0.052 9	0.004 9	0.172 3	0.011 7	0.024 2	0.000 6	324	213	161	10	154	4
12	29 443	129	226	0.105 7	0.016 7	0.317 7	0.039 5	0.026 3	0.001 1	1 728	293	280	30	167	7
13	37 429	792	46.9	0.053 8	0.003 9	0.183 8	0.011 3	0.025 4	0.000 5	365	163	171	10	162	3
14	39 550	590	66.5	0.049 3	0.005 0	0.166 2	0.014 8	0.025 2	0.000 5	165	218	156	13	160	3
15	40 261	1 959	20.4	0.048 2	0.002 3	0.167 3	0.008 0	0.025 1	0.000 3	109	111	157	7	160	2
16	30 321	425	70.8	0.055 0	0.005 4	0.179 4	0.014 6	0.025 1	0.000 6	413	222	168	13	160	4
17	43 257	746	57.6	0.049 9	0.003 5	0.163 1	0.009 9	0.023 8	0.000 4	191	163	153	9	152	3
18	30 737	353	86.5	0.057 8	0.006 3	0.186 9	0.014 8	0.024 9	0.000 6	520	241	174	13	158	4
19	29 551	323	90.9	0.056 4	0.007 0	0.186 2	0.016 5	0.024 8	0.000 6	478	280	173	14	158	4
20	34 455	931	36.7	0.054 3	0.004 0	0.183 4	0.011 6	0.024 8	0.000 4	383	167	171	10	158	3
19LD244-1
1	68 292	305	222	0.079 0	0.010 5	0.192 2	0.016 0	0.020 1	0.000 6	1 172	267	179	14	128	4
2	53 410	599	88.5	0.054 7	0.005 4	0.143 8	0.010 3	0.019 8	0.000 5	467	220	136	9	127	3
3	62 046	726	84.9	0.051 8	0.005 1	0.132 8	0.009 8	0.019 5	0.000 5	276	234	127	9	125	3
4	67 786	825	81.6	0.050 0	0.004 7	0.131 6	0.011 3	0.019 1	0.000 4	195	204	126	10	122	2
5	86 532	972	88.4	0.050 4	0.004 4	0.126 7	0.008 8	0.019 1	0.000 4	213	254	121	8	122	2
6	64 238	685	93.0	0.070 8	0.006 6	0.173 0	0.014 1	0.018 6	0.000 4	950	193	162	12	119	3
7	63 603	852	74.1	0.077 4	0.005 9	0.213 2	0.014 4	0.020 2	0.000 4	1 131	152	196	12	129	2
8	48 112	304	157	0.467 4	0.021 7	2.699 3	0.122 0	0.042 6	0.001 1	4 142	69	1 328	33	269	7
9	85 995	563	152	0.058 3	0.005 4	0.163 5	0.011 6	0.020 6	0.000 5	539	204	154	10	132	3
10	53 830	317	169	0.192 3	0.018 0	0.645 0	0.059 4	0.024 6	0.000 8	2 761	155	505	37	156	5
11	56 897	461	122	0.127 0	0.009 5	0.367 5	0.024 2	0.021 2	0.000 5	2 057	132	318	18	135	3
12	59 848	333	179	0.067 1	0.008 8	0.172 4	0.017 1	0.019 9	0.000 5	840	277	162	15	127	3
13	112 036	690	161	0.149 2	0.009 8	0.462 0	0.030 0	0.022 7	0.000 5	2 337	118	386	21	145	3
14	48 204	340	141	0.067 1	0.008 3	0.167 8	0.014 9	0.019 4	0.000 6	843	259	158	13	124	4
15	70 177	559	125	0.051 1	0.005 1	0.134 7	0.011 6	0.020 0	0.000 5	256	202	128	10	128	3
16	60 811	371	163	0.065 0	0.008 4	0.162 2	0.017 7	0.019 0	0.000 6	776	276	153	15	122	4
17	68 083	658	103	0.072 4	0.006 1	0.188 6	0.012 7	0.019 5	0.000 5	996	173	175	11	125	3
18	112 355	833	134	0.061 2	0.005 4	0.155 4	0.012 2	0.018 7	0.000 4	656	193	147	11	120	3
19	123 473	719	170	0.060 6	0.005 7	0.161 2	0.012 2	0.019 8	0.000 5	628	204	152	11	126	3
20	70 303	635	110	0.076 9	0.006 4	0.213 5	0.014 8	0.020 9	0.000 5	1 120	167	196	12	133	3
19LD254-1
1	27 181	2 104	12.8	0.050 9	0.002 4	0.170 0	0.008 1	0.024 2	0.000 3	235	109	159	7	154	2
2	45 424	2 074	21.7	0.048 2	0.002 2	0.160 3	0.007 0	0.024 2	0.000 3	109	104	151	6	154	2
3	35 996	2 105	17.0	0.050 0	0.002 8	0.188 7	0.010 7	0.029 2	0.001 2	195	131	176	9	186	8
4	31 446	2 076	15.0	0.047 8	0.002 2	0.163 9	0.007 5	0.024 8	0.000 3	100	94	154	7	158	2
5	32 327	1 678	19.1	0.052 8	0.002 8	0.175 0	0.008 7	0.024 4	0.000 4	320	120	164	8	156	2
6	34 893	1 817	19.1	0.052 6	0.002 7	0.173 0	0.007 7	0.024 2	0.000 3	322	119	162	7	154	2
7	27 563	1 303	21.0	0.051 1	0.003 5	0.167 7	0.011 3	0.024 0	0.000 4	256	156	157	10	153	2
8	37 835	1 987	18.9	0.050 5	0.002 5	0.166 9	0.008 2	0.024 0	0.000 3	220	113	157	7	153	2
9	34 547	2 170	15.8	0.051 7	0.002 9	0.166 4	0.008 9	0.023 5	0.000 3	272	128	156	8	150	2
10	36 333	2 326	15.5	0.050 0	0.002 3	0.164 1	0.007 4	0.023 8	0.000 3	198	109	154	6	152	2
11	40 357	1 924	20.8	0.051 8	0.002 8	0.171 2	0.009 2	0.024 0	0.000 3	276	126	160	8	153	2
12	22 899	1 936	11.7	0.048 4	0.002 3	0.157 2	0.007 5	0.023 4	0.000 3	117	83	148	7	149	2
13	36 822	1 894	19.3	0.053 1	0.003 0	0.172 4	0.009 2	0.024 0	0.000 3	332	130	162	8	153	2
14	26 758	1 804	14.7	0.051 3	0.002 5	0.168 9	0.008 3	0.024 1	0.000 3	254	82	158	7	153	2
15	34 610	1 871	18.4	0.053 5	0.002 7	0.173 0	0.008 3	0.023 5	0.000 3	350	113	162	7	150	2
16	30 515	1 450	20.9	0.050 9	0.003 7	0.169 1	0.011 8	0.024 5	0.000 4	235	168	159	10	156	2
17	29 835	1 772	16.7	0.052 3	0.002 9	0.173 9	0.009 6	0.024 2	0.000 3	298	128	163	8	154	2
18	42 534	1 682	25.1	0.050 3	0.002 7	0.173 7	0.009 0	0.025 2	0.000 4	209	126	163	8	160	2
19	27 140	2 450	11.0	0.049 8	0.002 1	0.167 4	0.007 1	0.024 4	0.000 3	187	100	157	6	156	2
20	36 421	1 707	21.2	0.086 8	0.003 6	0.299 8	0.012 2	0.025 1	0.000 3	1 355	79	266	10	160	2

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表 3 五龙金矿区中生代花岗岩的独居石原位LA-ICP-MS稀土元素含量（10^-6）

Table 3. LA-ICP-MS in-situ REE contents for monazites from the Mesozoic granites in Wulong gold field(10^-6)

分析点号	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu
19LD233-1
1	150 739	259 057	26 460	91 031	13 138	269	6 344	609	2 230	276	410	27.8	88.5	6.17
2	166 033	259 533	24 763	83 050	9 539	156	4 435	365	1 300	155	236	17.3	59.1	5.74
3	154 825	259 861	26 167	89 473	11 811	240	5 476	494	1 759	207	299	20.5	64.5	5.16
4	133 913	235 975	25 756	95 357	17 688	321	10 842	993	3 580	429	583	38.9	115	8.96
5	148 015	250 014	25 949	93 646	14 546	243	7 885	700	2 447	289	392	26.7	89.1	8.00
6	153 044	258 901	26 556	93 192	13 211	143	7 168	590	1 952	220	309	21.8	76.8	5.95
7	170 227	275 443	25 627	85 062	8 865	94	3 438	258	829	97.8	137	10.7	38.4	3.11
8	143 869	257 273	26 562	95 193	15 183	242	8 407	738	2 566	295	394	25.3	74.3	5.88
9	181 797	268 203	24 521	81 872	7 073	239	2 579	159	456	51.2	65.9	4.40	16.5	1.46
10	159 686	267 274	26 656	91 491	11 496	249	5 254	478	1 758	214	307	19.7	59.7	5.00
11	154 859	261 309	26 119	88 355	11 684	246	5 609	512	1 832	230	335	25.0	81.6	5.98
12	155 140	246 763	25 154	90 903	12 164	272	6 214	494	1 656	188	245	16.7	46.4	3.67
13	142 049	240 630	25 626	93 590	15 860	288	9 303	849	3 021	367	515	38.2	143	16.3
14	159 211	265 673	26 507	91 839	12 143	269	6 268	536	1 872	212	285	17.5	53.3	4.03
15	131 170	231 227	24 830	91 518	18 580	367	12 876	1343	4 999	601	851	58.0	172	13.5
16	156 733	262 662	25 746	89 984	11 737	276	5 732	517	1 881	224	315	21.3	63.4	4.90
17	157 424	260 920	26 585	91 248	12 510	205	6 550	599	2 160	248	340	22.4	65.3	5.12
18	154 071	258 955	25 454	89 378	12 520	290	6 523	571	1 988	230	307	20.2	56.3	3.97
19	176 048	264 020	23 721	75 432	7 641	116	3 186	250	845	98.8	155	12.8	47.1	3.51
20	143 192	258 381	26 869	94 194	14 671	299	8 172	763	2 706	315	437	27.1	82.4	6.24
19LD234-1
1	143 144	249 358	25 320	89 444	12 288	215	6 926	656	2 441	294	411	26.7	87.9	5.64
2	152 478	250 288	24 057	81 381	8 979	104	3 968	312	1 080	131	197	14.6	50.2	4.27
3	125 375	230 395	25 172	90 900	16 704	257	11 405	1 218	4 896	611	869	58.4	181	13.4
4	151 176	248 459	24 792	84 167	10 655	190	5 746	521	1 878	219	308	19.6	58.2	4.3
5	144 428	246 797	25 215	89 863	12 805	228	7 746	753	2 841	345	500	32.8	96.9	8.03
6	123 888	221 614	24 618	93 446	16 954	129	11 746	1 099	3 996	479	655	42.7	141	10.3
7	152 316	252 739	25 241	88 169	10 989	186	5 545	473	1 683	191	258	16.1	50.4	3.44
8	137 457	235 879	24 555	86 159	13 739	244	9 168	1 026	4 177	527	771	52.6	188	16.1
9	141 786	245 376	25 225	88 535	13 235	238	7 838	760	2 839	342	485	30.9	104	7.97
10	144 185	242 067	24 430	86 235	12 395	281	7 861	860	3 518	453	684	46.4	136	10.5
11	141 202	238 688	25 135	94 332	13 883	115	7 665	617	2 029	215	274	16.4	52.1	3.62
12	164 201	259 764	24 801	82 571	8 184	144	3 550	254	806	91.3	128	8.33	26.7	2.35
13	146 374	245 459	24 422	85 168	12 740	286	8 038	894	3 608	446	654	45.1	140	11.2
14	155 995	253 577	24 759	84 096	9 923	98.6	4 588	346	1 104	126	184	12.9	52.5	4.25
15	141 864	236 545	23 479	84 070	12 662	402	8 295	1 090	4 987	619	1039	83.9	300	22.4
16	155 022	254 117	24 635	85 461	10 869	214	5 625	495	1 831	213	289	19.2	59.7	4.09
17	158 705	250 774	23 569	81 434	8 878	203	4 212	351	1 215	142	206	13.9	47.5	3.88
18	160 696	257 712	25 146	86 977	10 111	167	4 880	393	1 291	148	188	12.3	37.5	2.65
19	158 994	257 310	25 038	84 865	9 569	102	4 354	337	1 032	110	151	10.5	33.0	2.26
20	137 654	242 386	25 357	88 630	15 009	213	10 346	1 162	4 838	588	844	57.4	196	14.0
19LD244-1
1	177 077	273 910	25 972	88 755	10 999	254	5 200	391	1 162	121	150	9.24	27.6	2.48
2	173 866	278 901	26 917	90 849	11 595	248	5 919	494	1 599	182	254	19.0	72.7	5.63
3	173 990	268 371	25 953	86 899	11 495	363	6 013	516	1 736	206	279	19.2	66.7	5.13
4	173 070	267 398	25 923	87 623	11 279	241	6 340	530	1 834	208	287	19.4	62.2	4.52
5	154 886	254 406	25 954	94 314	13 998	228	7 709	593	1 806	188	237	16.2	50.2	4.29
6	172 542	270 896	25 670	85 082	11 629	223	6 418	534	1 649	166	194	12.1	33.9	2.36
7	170 921	270 455	26 339	89 742	12 029	261	6 679	576	1 835	196	255	16.7	52.8	4.62
8	170 218	273 571	26 420	90 085	11 264	355	5 880	484	1 601	180	235	15.7	58.4	5.71
9	161 340	257 495	25 370	90 241	11 808	267	6 034	436	1 262	128	147	9.42	28.2	1.96
10	168 898	274 592	26 891	93 549	13 021	306	7 061	588	1 747	177	218	13.2	37.6	2.57
11	179 257	272 556	25 426	83 050	9 868	325	4 959	422	1 342	147	192	12.2	39.6	2.95
12	179 534	273 974	26 058	85 455	9 538	216	4 674	355	1 126	128	173	12.5	35.4	2.94
13	153 293	247 139	24 502	85 933	12 025	216	6 438	504	1 515	155	190	11.4	35.2	2.70
14	175 536	281 891	26 195	86 976	11 084	247	5 618	452	1 397	147	186	11.7	32.2	2.80
15	165 365	265 707	25 870	89 077	11 182	223	5 815	456	1 496	175	253	16.8	52.7	3.78
16	162 567	268 167	26 862	91 940	12 983	312	6 686	540	1 644	173	217	13.9	42.8	3.28
17	160 939	258 226	26 157	93 059	13 106	195	7 257	562	1 652	168	198	13.0	39.5	2.57
18	150 240	241 158	24 269	86 952	12 636	190	6 888	547	1 667	174	211	14.2	43.0	3.17
19	145 992	236 519	23 240	83 699	11 600	263	6 057	455	1 366	147	187	12.2	38.8	2.67
20	156 186	262 069	26 447	90 518	12 519	243	6 602	548	1 818	208	293	20.3	77.1	7.24
19LD254-1
1	155 377	263 176	25 971	94 708	13 220	355	7 821	890	3 757	508	801	58.4	193	15.95
2	154 614	261 193	25 955	93 947	12 868	350	7 363	814	3 325	449	678	48.1	161	12.35
3	153 399	254 728	25 539	95 321	14 617	374	9 508	930	3 576	441	667	45.1	153	11.76
4	156 031	263 452	26 254	95 049	13 194	360	7 885	904	3 733	503	768	55.7	187	15.07
5	161 148	262 087	25 992	92 828	12 362	335	7 070	763	3 052	401	593	40.8	136	10.03
6	158 892	263 157	25 723	92 813	12 304	337	7 196	778	3 125	406	600	42.3	139	11.11
7	164 204	269 436	26 515	95 871	12 491	337	7 114	734	2 913	372	565	37.7	126	9.07
8	155 403	259 641	25 683	93 533	12 868	361	7 705	864	3 549	469	711	49.8	167	12.01
9	153 620	264 025	25 880	94 206	12 680	354	7 320	804	3 294	438	659	49.8	163	12.41
10	154 854	259 448	25 841	93 978	13 109	361	8 094	914	3 880	521	825	60.4	205	16.57
11	154 666	258 910	25 961	94 566	13 569	357	8 514	864	3 344	423	650	44.9	147	10.98
12	158 572	274 201	26 770	93 898	12 708	357	7 169	784	3 291	432	677	47.7	164	13.39
13	159 256	261 311	25 567	92 939	12 713	361	7 451	805	3 251	434	648	46.8	148	11.46
14	167 748	271 315	25 913	89 247	11 397	311	6 330	703	2 910	382	609	44.1	145	12.27
15	161 934	262 808	25 984	92 202	12 233	325	6 980	772	3 214	421	637	45.9	153	11.35
16	162 930	268 207	26 350	95 514	12 436	331	6 999	747	2 927	374	565	39.3	124	9.58
17	162 167	268 168	26 164	93 283	12 139	323	6 721	740	3 024	402	613	46.4	142	12.13
18	158 809	258 091	25 494	94 071	14 385	351	9 184	888	3 284	410	598	41.2	125	10.88
19	157 234	270 014	26 197	92 172	12 345	352	6 964	798	3 344	454	705	51.6	183	14.41
20	157 096	260 682	25 721	92 611	12 287	339	7 063	732	2 943	380	565	39.7	129	9.76

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辽东地区中生代花岗岩的侵位时代：锆石和独居石U-Pb年代学

doi: 10.3799/dqkx.2020.293

作者简介:
胡国辉(1984-), 男, 助理研究员, 博士, 从事岩石学、地球化学和年代学方面的研究工作.ORCID:0000-0003-3505-102X.E-mail:huguohui321@126.com

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Emplacement Ages of Mesozoic Granites in Liaodong Area: Constraints from Zircon and Monazite U-Pb Dating

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辽东地区中生代花岗岩的侵位时代：锆石和独居石U-Pb年代学

doi: 10.3799/dqkx.2020.293

作者简介: 胡国辉(1984-), 男, 助理研究员, 博士, 从事岩石学、地球化学和年代学方面的研究工作.ORCID:0000-0003-3505-102X.E-mail:huguohui321@126.com

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Emplacement Ages of Mesozoic Granites in Liaodong Area: Constraints from Zircon and Monazite U-Pb Dating

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作者简介:
胡国辉(1984-), 男, 助理研究员, 博士, 从事岩石学、地球化学和年代学方面的研究工作.ORCID:0000-0003-3505-102X.E-mail:huguohui321@126.com