内蒙古北山地区中基性岩脉年代学和地球化学特征:对塔里木板块北缘构造演化的启示

doi:10.19657/j.geoscience.1000-8527.2022.089

现代地质 ›› 2023, Vol. 37 ›› Issue (03): 627-644.DOI: 10.19657/j.geoscience.1000-8527.2022.089

• 岩石学与岩石地球化学 • 上一篇下一篇

内蒙古北山地区中基性岩脉年代学和地球化学特征:对塔里木板块北缘构造演化的启示

薛仲凯¹(), 范堡程¹^,², 黄豪擎³^,⁴(), 唐卫东¹, 葛战林¹^,⁸, 李朋伟⁵, 胡建辉¹^,⁶, 杨晓奇⁷, 郭永超⁷, 李空¹

1.中国地质调查局西安矿产资源调查中心,陕西西安 710100
2.中国地质调查局西安地质调查中心,陕西西安 710054
3.成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都 610059
4.中国地质调查局应用地质研究中心,四川成都 610036
5.中国地质调查局廊坊自然资源综合调查中心,河北廊坊 065000
6.成都理工大学地球物理学院,四川成都 610059
7.额济纳旗圆通矿业有限责任公司,内蒙古额济纳旗 735400
8.中国地质大学(北京)地球科学与资源学院,北京 100083

收稿日期:2022-06-28 修回日期:2023-04-25 出版日期:2023-06-10 发布日期:2023-07-20
通讯作者: 黄豪擎,男,工程师,1993年出生,岩石地球化学专业,主要从事岩石地球化学与环境地质研究工作。Email:huanghhq999@163.com。
作者简介:薛仲凯,男,工程师,1992年出生,矿物学、岩石学、矿床学专业,主要从事矿床学与矿床地球化学研究。Email:18789411649@163.com。
基金资助:
中国地质调查局项目“秦岭成矿带金矿资源潜力动态评价”(DD20220975);“全国金矿资源潜力评价”(ZD20220318);“北山地区月牙山合黎山一带萤石铜钼矿调查评价”(DD20211552)

Geochronology and Geochemistry of the Intermediate-basic Dikes in the Beishan Area, Inner Mongolia: Implications for Tectonic Evolution of the Northern Margin of the Tarim Plate

XUE Zhongkai¹(), FAN Baocheng¹^,², HUANG Haoqing³^,⁴(), TANG Weidong¹, GE Zhanlin¹^,⁸, LI Pengwei⁵, HU Jianhui¹^,⁶, YANG Xiaoqi⁷, GUO Yongchao⁷, LI Kong¹

1. Xi’an Center of Mineral Resources Survey, China Geological Survey, Xi’an, Shaanxi 710100, China
2. Xi’an Center of Geological Survey, China Geological Survey, Xi’an, Shaanxi 710054, China
3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China
4. Research Center of Applied Geology of China Geological Survey, Chengdu, Sichuan 610036, China
5. Langfang Comprehensive Survey Center of Natural Resources, China Geological Survey, Langfang, Hebei 065000, China
6. School of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China
7. Ejina Banner Yuantong Mining Co., Ltd., Ejina Banner, Inner Mongolia 735400, China
8. School of Earth Sciences and Resources, China University of Geosciences(Beijing),Beijing 100083, China

Received:2022-06-28 Revised:2023-04-25 Online:2023-06-10 Published:2023-07-20

摘要/Abstract

摘要：

塔里木板块北缘额济纳旗老硐沟金矿床发育系列蚀变中基性岩脉,其形成时代与成因对制约金成矿作用及区域古亚洲洋的演化提供了研究窗口。本文在老硐沟金矿区Ⅱ矿段采集系列辉绿岩脉及与金成矿相关的蚀变闪长玢岩脉样品,进行了锆石LA-ICP-MS U-Pb定年、Hf同位素组成和全岩元素分析。结果表明,辉绿岩脉和闪长玢岩脉侵位时代分别为(286.5±1.7) Ma和(243.2±1.1) Ma,即早二叠世和中三叠世,二者年龄先后顺序与野外观察的交切关系相符。根据金矿体穿插闪长玢岩脉的特征,限定金成矿时代略晚于243 Ma。辉绿岩脉锆石ε_Hf(t)为-3.67~0.97,全岩元素组成表现为准铝质钙碱性系列,反映岩浆源区既有新元古代新生地壳组分,又有中元古代古老地壳组分。蚀变闪长玢岩脉ε_Hf(t)=-0.07~-4.76,全岩元素组成是过铝质钾玄岩系列(富钾特征受到矿区钾化蚀变的影响),指示其岩浆主要源于中元古代的地壳物质熔融。综合塔里木地块北缘晚古生代至早中生代构造演化史,提出晚石炭世—早二叠世北山地区古洋盆消减,洋壳俯冲导致地幔楔部分熔融,岩浆上侵至浅部断裂冷却形成辉绿岩脉;早二叠世末期北山地区进入陆内演化阶段,中三叠世产生造山后伸展作用,导致中元古代的地壳物质发生减压熔融,岩浆沿地壳断裂上侵、就位形成闪长玢岩脉。

关键词: U-Pb年龄, Lu-Hf同位素, 岩石地球化学, 锆石, 蚀变闪长玢岩, 辉绿岩, 老硐沟金矿, 额济纳旗

Abstract:

The formation age and genesis of the altered intermediate bedrock dike in the Laodonggou gold depo-sit (Ejin Banner, northern margin of Tarim terrane) provide a window to study the gold mineralization constraints and the Paleo-Asian Ocean evolution. In this study, a series of gold ore-related diabase dike and altered diorite porphyrite dike samples were collected from the Laodonggou ore section II, on which we conducted LA-ICP-MS zircon U-Pb dating, Hf isotope and whole-rock geochemical analyses. The results showed that the emplacement of diabase dikes and diorite porphyrite dikes occurred in the Early Permian (286.5±1.7 Ma) and Middle Triassic (243.2±1.1 Ma), respectively, and such age sequence is consistent with the observed field crosscutting relationship. According to the characteristics of diorite porphyrite dikes interlaced with gold orebo-dies, the gold mineralization is suggested to be slightly after 243 Ma. Zircon ε_Hf(t) value of the diabase dikes ranges from -3.67 to 0.97, and the whole-rock element composition shows that the rocks are peraluminous calc-alkaline. This indicates that the magma source region contains both Neoproterozoic juvenile crustal components and Mesoproterozoic ancient crustal components. Altered diorite porphyrite dike ε_Hf(t)=-0.07 to -4.76, and the whole-rock element composition is the peraluminous K-rich basalt series (K-rich characteristics affected by the potassic alteration in the mining area), indicating that the magma is mainly derived from the Mesoproterozoic crustal melting. Based on the Late Paleozoic to Early Mesozoic tectonic evolution in the northern margin of the Tarim block, we proposed that the Late Carboniferous-Early Permian paleo-oceanic basin subduction in the Beishan region may have led to partial melting of the mantle wedge, and that the magma may have ascended into shallow faults and cooled to form diabase dikes. In the end Early Permian, the Beishan region entered an intracontinental tectonic stage, and post-orogenic extension occurred in the Middle Triassic. This likely resulted in the decompression and melting of Mesoproterozoic crustal materials, and magma emplacement along crustal faults to form diorite porphyrite dikes.

Key words: U-Pb age, Lu-Hf isotope, lithogeochemistry, zircon, altered diorite porphyrite, diabase, Lao-donggou gold deposit, Ejina

中图分类号:

薛仲凯, 范堡程, 黄豪擎, 唐卫东, 葛战林, 李朋伟, 胡建辉, 杨晓奇, 郭永超, 李空. 内蒙古北山地区中基性岩脉年代学和地球化学特征:对塔里木板块北缘构造演化的启示[J]. 现代地质, 2023, 37(03): 627-644.

XUE Zhongkai, FAN Baocheng, HUANG Haoqing, TANG Weidong, GE Zhanlin, LI Pengwei, HU Jianhui, YANG Xiaoqi, GUO Yongchao, LI Kong. Geochronology and Geochemistry of the Intermediate-basic Dikes in the Beishan Area, Inner Mongolia: Implications for Tectonic Evolution of the Northern Margin of the Tarim Plate[J]. Geoscience, 2023, 37(03): 627-644.

图/表 16

图1 北山造山带大地构造位置示意图(a)、北山地区构造单元划分图(b)和北山地区区域地质简图(c)(据袁伟恒等[6],略有修改)

Fig.1 Schematic diagram of the tectonic location of the Beishan orogenic belt (a),structural unit division map of Beishan area (b), and district geological map of Beishan area (c) (modified from ref.[6])

图2 老硐沟金矿床地质图(据白大明等[7],略有修改)

Fig.2 Geological map of the Laodonggou gold deposit (modified from ref.[7])

图3 老硐沟金矿床Ⅱ矿段井下金矿体及矿石照片 (a)走向297°金矿脉;(b)方解石条带;(c)两组断裂交汇处矿体膨大;(d)矿石手标本;(e)矿石裂隙中发育孔雀石;(f)氧化矿石

Fig.3 Underground gold orebody and ore photos from the Laodonggou ore section II

图4 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩手标本及正交偏光镜下照片 (a1)(a2)蚀变闪长玢岩;(b1)(b2)辉绿岩;Pl.斜长石;Bt.黑云母;Hb.角闪石;Py.黄铁矿

Fig.4 Altered diorite porphyrite and diabase hand-specimens and thin-section (XPL) photos from the Laodonggou ore section Ⅱ

图5 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石样品锆石测点CL照片及年龄 (a)蚀变闪长玢岩;(b)辉绿岩

Fig.5 Zircon CL image of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ

图6 老硐沟金矿床Ⅱ矿段辉绿岩与蚀变闪长玢岩锆石U-Pb谐和图和加权平均年龄图 (a1)(a2)辉绿岩;(b1)(b2)蚀变闪长玢岩

Fig.6 Zircon U-Pb concordia diagram of diabase and altered diorite porphyrite from the Laodonggou ore section Ⅱ

表1 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石U-Th-Pb分析数据

Table 1 Zircon U-Th-Pb analysis data of altered diorite porphyrite and diabase from the Laodonggou ore section II

测点号	元素含量(10^-6)			Th/U	同位素比值								年龄(Ma)								谐和度 (%)
测点号	Pb	²³²Th	²³⁸U	Th/U	$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ	$? 208 P b ? 232 T h$	1σ	$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ	$? 208 P b ? 232 T h$	1σ	谐和度 (%)
LDGS001	38.23	174.60	251.51	0.69	0.04955	0.00236	0.26005	0.01206	0.03811	0.00050	0.01265	0.00027	174	108	235	10	241	3	254.0	5.49	0.97
LDGS002	44.42	206.98	292.95	0.71	0.05038	0.00210	0.26378	0.01068	0.03802	0.00046	0.01245	0.00024	212	94	238	9	241	3	250.2	4.88	0.99
LDGS003	42.61	229.85	273.03	0.84	0.04915	0.00275	0.26482	0.01443	0.03912	0.00056	0.01366	0.00031	155	126	239	12	247	4	274.2	6.14	0.96
LDGS004	42.35	192.73	276.74	0.70	0.05801	0.00239	0.30644	0.01221	0.03836	0.00048	0.01204	0.00025	530	88	271	9	243	3	241.9	5.08	0.89
LDGS005	51.51	243.02	337.78	0.72	0.05625	0.00226	0.29608	0.0115	0.03822	0.00047	0.01276	0.00025	462	87	263	9	242	3	256.3	5.00	0.92
LDGS006	37.15	161.24	241.52	0.67	0.05349	0.00259	0.28394	0.01334	0.03855	0.00052	0.01320	0.00030	350	106	254	11	244	3	265.1	6.05	0.96
LDGS007	43.36	219.22	281.59	0.78	0.05109	0.00234	0.27149	0.01207	0.03859	0.00050	0.01248	0.00026	245	102	244	10	244	3	250.7	5.22	1.00
LDGS008	45.22	223.65	292.39	0.76	0.04837	0.00220	0.25816	0.01140	0.03876	0.00049	0.01276	0.00025	117	104	233	9	245	3	256.3	5.07	0.95
LDGS009	55.26	302.00	359.58	0.84	0.05291	0.00214	0.28056	0.01098	0.03851	0.00047	0.01233	0.00022	325	89	251	9	244	3	247.8	4.45	0.97
LDGS010	28.38	106.87	186.34	0.57	0.06281	0.00327	0.32999	0.01665	0.03816	0.00057	0.01285	0.00036	702	107	290	13	241	4	258.1	7.26	0.83
LDGS011	43.77	176.79	283.96	0.62	0.0528	0.00245	0.28073	0.01266	0.03861	0.00051	0.01252	0.00030	320	102	251	10	244	3	251.5	5.90	0.97
LDGS012	45.38	246.29	295.69	0.83	0.05094	0.00254	0.26963	0.01309	0.03844	0.00052	0.01271	0.00027	238	111	242	10	243	3	255.4	5.38	1.00
LDGS013	35.53	142.05	228.29	0.62	0.05151	0.00349	0.27650	0.01827	0.03898	0.00066	0.01312	0.00043	264	149	248	15	247	4	263.5	8.56	0.99
LDGS014	35.16	155.68	231.19	0.67	0.05307	0.00296	0.27830	0.01514	0.03808	0.00055	0.01223	0.00032	332	122	249	12	241	3	245.7	6.34	0.97
LDGS015	30.70	134.52	197.04	0.68	0.05269	0.00319	0.28308	0.01668	0.03902	0.00061	0.01307	0.00037	315	132	253	13	247	4	262.4	7.34	0.98
LDGS016	49.64	223.58	326.05	0.69	0.04975	0.00247	0.26112	0.01262	0.03812	0.00051	0.01108	0.00028	183	112	236	10	241	3	222.7	5.62	0.98
LDGS017	31.83	128.04	205.98	0.62	0.05460	0.00323	0.29084	0.01678	0.03869	0.00059	0.01227	0.00040	396	127	259	13	245	4	246.5	7.91	0.94
LDGS018	27.97	125.15	182.41	0.69	0.05349	0.00332	0.28271	0.01708	0.03839	0.00061	0.01186	0.00036	350	134	253	14	243	4	238.3	7.15	0.96
LDGS019	29.97	135.22	192.26	0.70	0.04943	0.00342	0.26556	0.01795	0.03902	0.00066	0.01182	0.00038	168	154	239	14	247	4	237.6	7.52	0.97
LDGS020	39.72	198.92	259.46	0.77	0.06439	0.00307	0.33976	0.01565	0.03833	0.00054	0.01486	0.00032	754	97	297	12	243	3	298.1	6.33	0.82
LDGS021	42.99	184.13	277.35	0.66	0.05334	0.00237	0.28498	0.01231	0.03880	0.00050	0.01244	0.00027	343	97	255	10	245	3	249.9	5.44	0.96
LDGS022	39.38	184.12	258.07	0.71	0.05346	0.00225	0.28118	0.01148	0.03820	0.00047	0.01149	0.00024	348	92	252	9	242	3	230.9	4.85	0.96
LDGS023	38.39	160.69	250.41	0.64	0.05254	0.00241	0.27763	0.01240	0.03838	0.00049	0.01186	0.00027	309	101	249	10	243	3	238.3	5.39	0.98
LDGS024	39.17	177.15	254.57	0.70	0.05145	0.00247	0.27280	0.01273	0.03851	0.00051	0.01185	0.00027	261	106	245	10	244	3	238.1	5.47	0.99
LDGS025	36.62	170.96	237.09	0.72	0.05027	0.00250	0.26757	0.01297	0.03866	0.00052	0.01203	0.00027	208	112	241	10	245	3	241.7	5.49	0.98
LDGS026	40.06	188.6	262.44	0.72	0.05046	0.00211	0.26543	0.01076	0.03820	0.00047	0.01229	0.00024	216	94	239	9	242	3	246.8	4.70	0.99
LDGS027	53.52	266.51	351.33	0.76	0.05314	0.00208	0.27890	0.01058	0.03812	0.00046	0.01258	0.00023	335	86	250	8	241	3	252.7	4.53	0.97
LDGS028	44.58	230.34	285.80	0.81	0.05159	0.00228	0.27727	0.01192	0.03903	0.00049	0.01289	0.00025	267	98	249	9	247	3	258.9	4.94	0.99
LDGS029	35.83	162.42	232.44	0.70	0.05438	0.00250	0.28881	0.01290	0.03857	0.00051	0.01236	0.00027	387	100	258	10	244	3	248.2	5.40	0.95
LDGS030	47.68	230.12	314.06	0.73	0.05334	0.00215	0.27899	0.01089	0.03799	0.00046	0.01156	0.00022	343	88	250	9	240	3	232.4	4.49	0.96
LDGH001	34.39	100.79	182.94	0.55	0.05261	0.00139	0.33126	0.00832	0.04566	0.00053	0.01412	0.00081	312	59	291	6	288	3	283.3	16.11	0.99
LDGH002	14.32	48.95	75.54	0.65	0.05169	0.00172	0.32818	0.01047	0.04604	0.0006	0.01393	0.00093	272	75	288	8	290	4	279.6	18.64	1.01
LDGH003	24.73	83.48	129.96	0.64	0.05353	0.00146	0.34112	0.00883	0.04621	0.00055	0.01382	0.00078	351	60	298	7	291	3	277.4	15.5	0.98
LDGH004	26.91	98.67	141.42	0.70	0.05097	0.00152	0.32454	0.00925	0.04617	0.00058	0.01441	0.00085	240	68	285	7	291	4	289.3	16.97	1.02
LDGH005	13.92	55.17	74.41	0.74	0.05130	0.00176	0.32105	0.01057	0.04538	0.00059	0.01249	0.00082	254	77	283	8	286	4	250.9	16.41	1.01
LDGH006	28.32	113.05	152.35	0.74	0.05125	0.00121	0.31860	0.00716	0.04508	0.00050	0.01518	0.00062	252	54	281	6	284	3	304.5	12.41	1.01
LDGH007	21.95	89.45	116.93	0.76	0.05036	0.00144	0.31606	0.00864	0.04551	0.00055	0.01424	0.00074	212	65	279	7	287	3	285.8	14.83	1.03
LDGH008	41.35	107.61	222.63	0.48	0.0512	0.00105	0.31790	0.00615	0.04502	0.00047	0.01315	0.00061	250	46	280	5	284	3	264.1	12.19	1.01
LDGH009	68.68	165.01	369.06	0.45	0.05135	0.00094	0.31908	0.00548	0.04506	0.00045	0.01312	0.00052	257	41	281	4	284	3	263.4	10.38	1.01
LDGH010	17.57	73.44	94.37	0.78	0.05197	0.00171	0.32302	0.01018	0.04507	0.00058	0.01313	0.00084	284	73	284	8	284	4	263.6	16.71	1.00
LDGH011	14.67	69.33	78.20	0.89	0.04828	0.00201	0.30216	0.01213	0.04538	0.00063	0.01205	0.00084	113	95	268	9	286	4	242.1	16.76	1.07
LDGH012	16.92	38.94	88.63	0.44	0.0503	0.00232	0.32033	0.01418	0.04618	0.00075	0.01559	0.00175	209	104	282	11	291	5	312.7	34.84	1.03
LDGH013	32.01	118.49	172.17	0.69	0.05285	0.00122	0.32763	0.00719	0.04495	0.00050	0.01433	0.00064	322	52	288	6	284	3	287.6	12.84	0.99
LDGH014	14.35	59.65	77.16	0.77	0.05305	0.00235	0.32884	0.01402	0.04495	0.00069	0.01368	0.00114	331	97	289	11	284	4	274.5	22.75	0.98
LDGH015	11.17	42.24	60.02	0.70	0.05229	0.00238	0.32422	0.0142	0.04496	0.00071	0.01482	0.00123	298	101	285	11	284	4	297.3	24.47	0.99
LDGH016	20.00	63.72	104.64	0.61	0.05439	0.00192	0.34633	0.0117	0.04618	0.00064	0.01416	0.00113	387	77	302	9	291	4	284.1	22.44	0.96
LDGH017	15.13	47.16	80.29	0.59	0.05112	0.00205	0.32088	0.01236	0.04551	0.00065	0.01653	0.00131	246	90	283	10	287	4	331.3	25.98	1.02

表1 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石U-Th-Pb分析数据

Table 1 Zircon U-Th-Pb analysis data of altered diorite porphyrite and diabase from the Laodonggou ore section II

测点号	元素含量(10^-6)			Th/U	同位素比值								年龄(Ma)								谐和度 (%)
测点号	Pb	²³²Th	²³⁸U	Th/U	$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ	$? 208 P b ? 232 T h$	1σ	$? 207 P b ? 206 P b$	1σ	$? 207 P b ? 235 U$	1σ	$? 206 P b ? 238 U$	1σ	$? 208 P b ? 232 T h$	1σ	谐和度 (%)
LDGS001	38.23	174.60	251.51	0.69	0.04955	0.00236	0.26005	0.01206	0.03811	0.00050	0.01265	0.00027	174	108	235	10	241	3	254.0	5.49	0.97
LDGS002	44.42	206.98	292.95	0.71	0.05038	0.00210	0.26378	0.01068	0.03802	0.00046	0.01245	0.00024	212	94	238	9	241	3	250.2	4.88	0.99
LDGS003	42.61	229.85	273.03	0.84	0.04915	0.00275	0.26482	0.01443	0.03912	0.00056	0.01366	0.00031	155	126	239	12	247	4	274.2	6.14	0.96
LDGS004	42.35	192.73	276.74	0.70	0.05801	0.00239	0.30644	0.01221	0.03836	0.00048	0.01204	0.00025	530	88	271	9	243	3	241.9	5.08	0.89
LDGS005	51.51	243.02	337.78	0.72	0.05625	0.00226	0.29608	0.0115	0.03822	0.00047	0.01276	0.00025	462	87	263	9	242	3	256.3	5.00	0.92
LDGS006	37.15	161.24	241.52	0.67	0.05349	0.00259	0.28394	0.01334	0.03855	0.00052	0.01320	0.00030	350	106	254	11	244	3	265.1	6.05	0.96
LDGS007	43.36	219.22	281.59	0.78	0.05109	0.00234	0.27149	0.01207	0.03859	0.00050	0.01248	0.00026	245	102	244	10	244	3	250.7	5.22	1.00
LDGS008	45.22	223.65	292.39	0.76	0.04837	0.00220	0.25816	0.01140	0.03876	0.00049	0.01276	0.00025	117	104	233	9	245	3	256.3	5.07	0.95
LDGS009	55.26	302.00	359.58	0.84	0.05291	0.00214	0.28056	0.01098	0.03851	0.00047	0.01233	0.00022	325	89	251	9	244	3	247.8	4.45	0.97
LDGS010	28.38	106.87	186.34	0.57	0.06281	0.00327	0.32999	0.01665	0.03816	0.00057	0.01285	0.00036	702	107	290	13	241	4	258.1	7.26	0.83
LDGS011	43.77	176.79	283.96	0.62	0.0528	0.00245	0.28073	0.01266	0.03861	0.00051	0.01252	0.00030	320	102	251	10	244	3	251.5	5.90	0.97
LDGS012	45.38	246.29	295.69	0.83	0.05094	0.00254	0.26963	0.01309	0.03844	0.00052	0.01271	0.00027	238	111	242	10	243	3	255.4	5.38	1.00
LDGS013	35.53	142.05	228.29	0.62	0.05151	0.00349	0.27650	0.01827	0.03898	0.00066	0.01312	0.00043	264	149	248	15	247	4	263.5	8.56	0.99
LDGS014	35.16	155.68	231.19	0.67	0.05307	0.00296	0.27830	0.01514	0.03808	0.00055	0.01223	0.00032	332	122	249	12	241	3	245.7	6.34	0.97
LDGS015	30.70	134.52	197.04	0.68	0.05269	0.00319	0.28308	0.01668	0.03902	0.00061	0.01307	0.00037	315	132	253	13	247	4	262.4	7.34	0.98
LDGS016	49.64	223.58	326.05	0.69	0.04975	0.00247	0.26112	0.01262	0.03812	0.00051	0.01108	0.00028	183	112	236	10	241	3	222.7	5.62	0.98
LDGS017	31.83	128.04	205.98	0.62	0.05460	0.00323	0.29084	0.01678	0.03869	0.00059	0.01227	0.00040	396	127	259	13	245	4	246.5	7.91	0.94
LDGS018	27.97	125.15	182.41	0.69	0.05349	0.00332	0.28271	0.01708	0.03839	0.00061	0.01186	0.00036	350	134	253	14	243	4	238.3	7.15	0.96
LDGS019	29.97	135.22	192.26	0.70	0.04943	0.00342	0.26556	0.01795	0.03902	0.00066	0.01182	0.00038	168	154	239	14	247	4	237.6	7.52	0.97
LDGS020	39.72	198.92	259.46	0.77	0.06439	0.00307	0.33976	0.01565	0.03833	0.00054	0.01486	0.00032	754	97	297	12	243	3	298.1	6.33	0.82
LDGS021	42.99	184.13	277.35	0.66	0.05334	0.00237	0.28498	0.01231	0.03880	0.00050	0.01244	0.00027	343	97	255	10	245	3	249.9	5.44	0.96
LDGS022	39.38	184.12	258.07	0.71	0.05346	0.00225	0.28118	0.01148	0.03820	0.00047	0.01149	0.00024	348	92	252	9	242	3	230.9	4.85	0.96
LDGS023	38.39	160.69	250.41	0.64	0.05254	0.00241	0.27763	0.01240	0.03838	0.00049	0.01186	0.00027	309	101	249	10	243	3	238.3	5.39	0.98
LDGS024	39.17	177.15	254.57	0.70	0.05145	0.00247	0.27280	0.01273	0.03851	0.00051	0.01185	0.00027	261	106	245	10	244	3	238.1	5.47	0.99
LDGS025	36.62	170.96	237.09	0.72	0.05027	0.00250	0.26757	0.01297	0.03866	0.00052	0.01203	0.00027	208	112	241	10	245	3	241.7	5.49	0.98
LDGS026	40.06	188.6	262.44	0.72	0.05046	0.00211	0.26543	0.01076	0.03820	0.00047	0.01229	0.00024	216	94	239	9	242	3	246.8	4.70	0.99
LDGS027	53.52	266.51	351.33	0.76	0.05314	0.00208	0.27890	0.01058	0.03812	0.00046	0.01258	0.00023	335	86	250	8	241	3	252.7	4.53	0.97
LDGS028	44.58	230.34	285.80	0.81	0.05159	0.00228	0.27727	0.01192	0.03903	0.00049	0.01289	0.00025	267	98	249	9	247	3	258.9	4.94	0.99
LDGS029	35.83	162.42	232.44	0.70	0.05438	0.00250	0.28881	0.01290	0.03857	0.00051	0.01236	0.00027	387	100	258	10	244	3	248.2	5.40	0.95
LDGS030	47.68	230.12	314.06	0.73	0.05334	0.00215	0.27899	0.01089	0.03799	0.00046	0.01156	0.00022	343	88	250	9	240	3	232.4	4.49	0.96
LDGH001	34.39	100.79	182.94	0.55	0.05261	0.00139	0.33126	0.00832	0.04566	0.00053	0.01412	0.00081	312	59	291	6	288	3	283.3	16.11	0.99
LDGH002	14.32	48.95	75.54	0.65	0.05169	0.00172	0.32818	0.01047	0.04604	0.0006	0.01393	0.00093	272	75	288	8	290	4	279.6	18.64	1.01
LDGH003	24.73	83.48	129.96	0.64	0.05353	0.00146	0.34112	0.00883	0.04621	0.00055	0.01382	0.00078	351	60	298	7	291	3	277.4	15.5	0.98
LDGH004	26.91	98.67	141.42	0.70	0.05097	0.00152	0.32454	0.00925	0.04617	0.00058	0.01441	0.00085	240	68	285	7	291	4	289.3	16.97	1.02
LDGH005	13.92	55.17	74.41	0.74	0.05130	0.00176	0.32105	0.01057	0.04538	0.00059	0.01249	0.00082	254	77	283	8	286	4	250.9	16.41	1.01
LDGH006	28.32	113.05	152.35	0.74	0.05125	0.00121	0.31860	0.00716	0.04508	0.00050	0.01518	0.00062	252	54	281	6	284	3	304.5	12.41	1.01
LDGH007	21.95	89.45	116.93	0.76	0.05036	0.00144	0.31606	0.00864	0.04551	0.00055	0.01424	0.00074	212	65	279	7	287	3	285.8	14.83	1.03
LDGH008	41.35	107.61	222.63	0.48	0.0512	0.00105	0.31790	0.00615	0.04502	0.00047	0.01315	0.00061	250	46	280	5	284	3	264.1	12.19	1.01
LDGH009	68.68	165.01	369.06	0.45	0.05135	0.00094	0.31908	0.00548	0.04506	0.00045	0.01312	0.00052	257	41	281	4	284	3	263.4	10.38	1.01
LDGH010	17.57	73.44	94.37	0.78	0.05197	0.00171	0.32302	0.01018	0.04507	0.00058	0.01313	0.00084	284	73	284	8	284	4	263.6	16.71	1.00
LDGH011	14.67	69.33	78.20	0.89	0.04828	0.00201	0.30216	0.01213	0.04538	0.00063	0.01205	0.00084	113	95	268	9	286	4	242.1	16.76	1.07
LDGH012	16.92	38.94	88.63	0.44	0.0503	0.00232	0.32033	0.01418	0.04618	0.00075	0.01559	0.00175	209	104	282	11	291	5	312.7	34.84	1.03
LDGH013	32.01	118.49	172.17	0.69	0.05285	0.00122	0.32763	0.00719	0.04495	0.00050	0.01433	0.00064	322	52	288	6	284	3	287.6	12.84	0.99
LDGH014	14.35	59.65	77.16	0.77	0.05305	0.00235	0.32884	0.01402	0.04495	0.00069	0.01368	0.00114	331	97	289	11	284	4	274.5	22.75	0.98
LDGH015	11.17	42.24	60.02	0.70	0.05229	0.00238	0.32422	0.0142	0.04496	0.00071	0.01482	0.00123	298	101	285	11	284	4	297.3	24.47	0.99
LDGH016	20.00	63.72	104.64	0.61	0.05439	0.00192	0.34633	0.0117	0.04618	0.00064	0.01416	0.00113	387	77	302	9	291	4	284.1	22.44	0.96
LDGH017	15.13	47.16	80.29	0.59	0.05112	0.00205	0.32088	0.01236	0.04551	0.00065	0.01653	0.00131	246	90	283	10	287	4	331.3	25.98	1.02

表2 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石分析点位稀土元素与微量元素含量(10-6)

Table 2 Zircon rare earth and trace element contents of altered diorite porphyrite and diabase from the Laodonggou ore section II(10-6)

测试点	Nb	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Ta	Nb/Ta
LDGS001	1.371	0.0058	38.27	0.0842	1.31	2.97	0.949	13.06	4.33	54.04	20.53	90.28	20.56	209.12	39.59	0.596	2.300
LDGS002	1.641	0.0140	36.93	0.0859	1.48	3.37	0.917	13.19	4.60	53.96	21.05	94.81	21.23	213.33	40.36	0.535	3.067
LDGS003	1.431	0.0270	38.02	0.1100	1.61	2.82	0.899	15.07	4.74	53.98	19.05	89.72	17.64	188.85	37.61	0.486	2.944
LDGS004	1.821	4.1800	49.77	1.1110	5.57	3.21	0.829	13.41	5.09	60.92	23.29	108.23	24.17	245.47	47.53	0.447	4.073
LDGS005	2.200	3.6200	48.85	1.0370	5.36	4.27	1.283	18.50	5.76	71.35	28.19	129.33	29.92	293.56	57.15	0.836	2.631
LDGS006	1.350	0.0084	35.13	0.0637	1.10	2.43	0.756	12.16	4.14	48.00	18.26	83.05	18.52	186.27	36.67	0.564	2.393
LDGS007	1.655	0.2380	39.37	0.1290	1.83	2.72	1.000	12.58	4.74	54.64	19.89	89.86	19.61	202.37	37.47	0.524	3.158
LDGS008	1.846	0.0366	40.94	0.0870	1.81	3.32	1.436	18.07	6.07	68.04	27.11	121.82	26.71	269.31	55.25	0.647	2.853
LDGS009	2.560	0.0260	52.67	0.2010	2.95	6.29	1.626	27.27	8.70	104.39	38.31	175.78	38.61	373.55	72.48	0.784	3.265
LDGS010	1.405	1.8420	29.03	0.5770	3.02	2.56	0.902	9.61	3.55	40.99	15.30	73.95	16.23	164.10	31.76	0.604	2.326
LDGS011	2.270	0.0165	37.65	0.1140	1.59	3.97	1.399	19.85	6.59	80.70	30.01	142.60	31.86	334.09	64.10	0.593	3.827
LDGS012	1.648	0.0251	43.71	0.0870	1.49	3.11	1.031	13.15	5.02	55.08	20.45	91.68	20.70	204.62	40.32	0.571	2.886
LDGS013	1.382	43.8100	129.27	11.0300	48.68	7.10	1.880	18.33	4.83	52.77	20.10	88.48	19.85	188.22	39.35	0.546	2.531
LDGS014	1.527	0.0340	32.56	0.0670	1.42	3.62	1.074	15.39	4.76	55.60	22.27	103.85	22.85	231.11	46.81	0.635	2.404
LDGS015	0.884	1.6640	33.88	0.4200	2.97	2.78	0.883	11.65	4.10	44.96	15.87	75.11	17.09	174.44	33.55	0.434	2.036
LDGS016	2.930	0.0106	43.00	0.1100	2.04	4.76	1.313	19.44	7.28	87.01	34.65	153.94	34.37	345.13	67.31	0.962	3.045
LDGS017	1.495	25.4700	91.13	6.9300	28.88	8.37	1.462	19.90	5.43	61.17	22.46	106.29	23.62	236.64	47.71	0.691	2.163
LDGS018	1.089	0.0265	29.07	0.0800	0.86	1.92	0.945	8.59	3.12	37.06	14.24	69.38	14.49	152.87	29.67	0.323	3.371
LDGS019	1.068	0.0288	28.17	0.0730	1.55	2.80	0.932	15.27	4.82	55.75	20.89	95.73	19.97	206.67	41.00	0.488	2.188
LDGS020	1.148	75.0600	186.85	18.6400	79.58	15.63	2.090	18.45	6.02	57.27	20.41	87.87	19.62	192.03	39.29	0.422	2.720
LDGS021	1.634	8.3500	53.83	2.1100	10.14	4.66	0.990	16.56	5.30	59.77	22.83	104.16	22.33	241.46	46.44	0.698	2.341
LDGS022	1.133	16.3800	72.44	4.3300	19.15	6.51	1.086	15.22	4.73	55.72	20.52	90.64	20.22	198.45	39.17	0.670	1.691
LDGS023	1.635	0.0217	36.22	0.0950	1.77	2.57	0.950	15.75	5.13	63.07	22.83	105.46	24.07	257.62	49.49	0.642	2.546
LDGS024	1.783	1.5510	41.82	0.4470	3.16	2.64	0.982	15.99	5.32	60.09	23.30	109.47	23.46	239.64	47.33	0.768	2.321
LDGS025	1.512	0.0060	36.64	0.0667	1.48	2.74	0.893	14.26	5.13	57.50	21.12	97.92	22.07	225.80	42.20	0.616	2.454
LDGS026	1.657	8.6100	57.59	2.1500	9.55	3.78	1.220	15.78	4.51	53.96	20.51	92.28	20.86	215.25	41.01	0.626	2.646
LDGS027	1.863	40.5600	127.80	10.0500	42.83	13.31	2.370	33.11	9.80	104.32	37.15	169.90	35.64	345.07	68.66	0.601	3.099
LDGS028	2.200	0.0413	42.70	0.1040	1.95	3.01	1.398	17.69	6.41	74.75	29.24	131.84	29.73	287.23	57.94	0.593	3.709
LDGS029	1.406	0.0071	34.03	0.0679	1.31	2.36	0.991	15.09	4.69	53.08	19.60	89.91	19.61	208.65	41.69	0.581	2.419
LDGS030	1.910	0.2540	41.2	0.1660	2.20	3.71	1.057	18.69	5.93	70.95	27.66	119.61	27.93	269.16	51.89	0.733	2.605
LDGH001	0.418	0.0340	5.20	0.0150	0.19	0.32	0.283	3.82	1.56	26.83	11.05	59.26	16.92	221.88	53.13	0.323	1.294
LDGH002	0.612	0.0520	6.87	0.0270	0.69	2.14	0.607	13.11	4.94	64.36	25.75	125.35	27.50	266.44	55.40	0.342	1.789
LDGH003	1.254	0.0044	9.80	0.0230	0.48	1.61	0.486	13.58	4.66	67.52	30.40	155.70	33.84	345.73	73.32	0.574	2.184
LDGH004	0.463	0.0090	7.01	0.0360	0.52	1.30	0.213	6.61	2.92	35.02	14.50	79.40	20.50	241.23	56.19	0.272	1.702
LDGH005	0.610	0.0400	7.80	0.0520	0.64	1.40	0.255	11.04	4.88	58.82	24.53	110.28	24.00	242.39	48.07	0.400	1.525
LDGH006	0.579	0.0140	8.29	0.0300	0.44	1.42	0.405	7.92	3.12	45.00	18.82	94.07	23.88	266.56	58.64	0.229	2.528
LDGH007	0.531	0.0041	8.90	0.0660	1.44	3.22	0.500	20.01	6.76	83.75	35.38	161.48	33.63	340.12	68.16	0.430	1.234
LDGH008	0.376	0.0103	4.99	0.0089	0.24	0.264	0.194	2.98	1.129	20.82	9.47	50.83	14.97	185.77	44.75	0.353	1.065
LDGH009	0.729	0.1910	9.42	0.1400	1.12	0.80	0.366	4.29	1.82	26.34	12.76	71.21	19.73	262.52	63.53	0.678	1.075
LDGH010	0.686	0.0022	8.86	0.0310	0.74	2.68	0.402	13.14	5.82	71.13	28.62	129.41	28.41	277.03	55.91	0.281	2.441
LDGH011	0.437	0.0072	7.99	0.0590	1.61	4.06	0.740	17.40	7.02	88.95	33.61	150.17	32.25	308.09	59.05	0.276	1.583
LDGH012	0.247	0.0480	4.05	0.0360	0.30	0.44	0.300	2.00	0.71	11.85	6.10	36.06	10.05	125.14	28.95	0.239	1.033
LDGH013	0.343	0.5660	9.21	0.4370	2.81	1.99	0.671	8.48	3.02	39.17	16.19	83.05	20.91	243.41	55.77	0.341	1.005
LDGH014	0.651	0.0090	7.55	0.0560	1.07	2.90	0.392	15.74	5.93	70.31	29.03	136.11	28.99	276.70	57.08	0.420	1.550
LDGH015	0.356	0.2410	7.24	0.0700	0.53	2.12	0.496	11.15	4.21	54.31	22.12	101.51	21.37	216.34	42.33	0.201	1.771
LDGH016	0.937	0.0032	8.57	0.0350	0.40	0.92	0.209	6.53	2.87	36.90	15.43	76.46	17.50	196.07	39.38	0.267	3.509
LDGH017	0.476	0.0540	6.54	0.0260	0.32	0.57	0.207	4.72	2.21	27.76	13.83	70.25	17.49	184.82	41.07	0.224	2.125

表2 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石分析点位稀土元素与微量元素含量(10-6)

Table 2 Zircon rare earth and trace element contents of altered diorite porphyrite and diabase from the Laodonggou ore section II(10-6)

测试点	Nb	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Ta	Nb/Ta
LDGS001	1.371	0.0058	38.27	0.0842	1.31	2.97	0.949	13.06	4.33	54.04	20.53	90.28	20.56	209.12	39.59	0.596	2.300
LDGS002	1.641	0.0140	36.93	0.0859	1.48	3.37	0.917	13.19	4.60	53.96	21.05	94.81	21.23	213.33	40.36	0.535	3.067
LDGS003	1.431	0.0270	38.02	0.1100	1.61	2.82	0.899	15.07	4.74	53.98	19.05	89.72	17.64	188.85	37.61	0.486	2.944
LDGS004	1.821	4.1800	49.77	1.1110	5.57	3.21	0.829	13.41	5.09	60.92	23.29	108.23	24.17	245.47	47.53	0.447	4.073
LDGS005	2.200	3.6200	48.85	1.0370	5.36	4.27	1.283	18.50	5.76	71.35	28.19	129.33	29.92	293.56	57.15	0.836	2.631
LDGS006	1.350	0.0084	35.13	0.0637	1.10	2.43	0.756	12.16	4.14	48.00	18.26	83.05	18.52	186.27	36.67	0.564	2.393
LDGS007	1.655	0.2380	39.37	0.1290	1.83	2.72	1.000	12.58	4.74	54.64	19.89	89.86	19.61	202.37	37.47	0.524	3.158
LDGS008	1.846	0.0366	40.94	0.0870	1.81	3.32	1.436	18.07	6.07	68.04	27.11	121.82	26.71	269.31	55.25	0.647	2.853
LDGS009	2.560	0.0260	52.67	0.2010	2.95	6.29	1.626	27.27	8.70	104.39	38.31	175.78	38.61	373.55	72.48	0.784	3.265
LDGS010	1.405	1.8420	29.03	0.5770	3.02	2.56	0.902	9.61	3.55	40.99	15.30	73.95	16.23	164.10	31.76	0.604	2.326
LDGS011	2.270	0.0165	37.65	0.1140	1.59	3.97	1.399	19.85	6.59	80.70	30.01	142.60	31.86	334.09	64.10	0.593	3.827
LDGS012	1.648	0.0251	43.71	0.0870	1.49	3.11	1.031	13.15	5.02	55.08	20.45	91.68	20.70	204.62	40.32	0.571	2.886
LDGS013	1.382	43.8100	129.27	11.0300	48.68	7.10	1.880	18.33	4.83	52.77	20.10	88.48	19.85	188.22	39.35	0.546	2.531
LDGS014	1.527	0.0340	32.56	0.0670	1.42	3.62	1.074	15.39	4.76	55.60	22.27	103.85	22.85	231.11	46.81	0.635	2.404
LDGS015	0.884	1.6640	33.88	0.4200	2.97	2.78	0.883	11.65	4.10	44.96	15.87	75.11	17.09	174.44	33.55	0.434	2.036
LDGS016	2.930	0.0106	43.00	0.1100	2.04	4.76	1.313	19.44	7.28	87.01	34.65	153.94	34.37	345.13	67.31	0.962	3.045
LDGS017	1.495	25.4700	91.13	6.9300	28.88	8.37	1.462	19.90	5.43	61.17	22.46	106.29	23.62	236.64	47.71	0.691	2.163
LDGS018	1.089	0.0265	29.07	0.0800	0.86	1.92	0.945	8.59	3.12	37.06	14.24	69.38	14.49	152.87	29.67	0.323	3.371
LDGS019	1.068	0.0288	28.17	0.0730	1.55	2.80	0.932	15.27	4.82	55.75	20.89	95.73	19.97	206.67	41.00	0.488	2.188
LDGS020	1.148	75.0600	186.85	18.6400	79.58	15.63	2.090	18.45	6.02	57.27	20.41	87.87	19.62	192.03	39.29	0.422	2.720
LDGS021	1.634	8.3500	53.83	2.1100	10.14	4.66	0.990	16.56	5.30	59.77	22.83	104.16	22.33	241.46	46.44	0.698	2.341
LDGS022	1.133	16.3800	72.44	4.3300	19.15	6.51	1.086	15.22	4.73	55.72	20.52	90.64	20.22	198.45	39.17	0.670	1.691
LDGS023	1.635	0.0217	36.22	0.0950	1.77	2.57	0.950	15.75	5.13	63.07	22.83	105.46	24.07	257.62	49.49	0.642	2.546
LDGS024	1.783	1.5510	41.82	0.4470	3.16	2.64	0.982	15.99	5.32	60.09	23.30	109.47	23.46	239.64	47.33	0.768	2.321
LDGS025	1.512	0.0060	36.64	0.0667	1.48	2.74	0.893	14.26	5.13	57.50	21.12	97.92	22.07	225.80	42.20	0.616	2.454
LDGS026	1.657	8.6100	57.59	2.1500	9.55	3.78	1.220	15.78	4.51	53.96	20.51	92.28	20.86	215.25	41.01	0.626	2.646
LDGS027	1.863	40.5600	127.80	10.0500	42.83	13.31	2.370	33.11	9.80	104.32	37.15	169.90	35.64	345.07	68.66	0.601	3.099
LDGS028	2.200	0.0413	42.70	0.1040	1.95	3.01	1.398	17.69	6.41	74.75	29.24	131.84	29.73	287.23	57.94	0.593	3.709
LDGS029	1.406	0.0071	34.03	0.0679	1.31	2.36	0.991	15.09	4.69	53.08	19.60	89.91	19.61	208.65	41.69	0.581	2.419
LDGS030	1.910	0.2540	41.2	0.1660	2.20	3.71	1.057	18.69	5.93	70.95	27.66	119.61	27.93	269.16	51.89	0.733	2.605
LDGH001	0.418	0.0340	5.20	0.0150	0.19	0.32	0.283	3.82	1.56	26.83	11.05	59.26	16.92	221.88	53.13	0.323	1.294
LDGH002	0.612	0.0520	6.87	0.0270	0.69	2.14	0.607	13.11	4.94	64.36	25.75	125.35	27.50	266.44	55.40	0.342	1.789
LDGH003	1.254	0.0044	9.80	0.0230	0.48	1.61	0.486	13.58	4.66	67.52	30.40	155.70	33.84	345.73	73.32	0.574	2.184
LDGH004	0.463	0.0090	7.01	0.0360	0.52	1.30	0.213	6.61	2.92	35.02	14.50	79.40	20.50	241.23	56.19	0.272	1.702
LDGH005	0.610	0.0400	7.80	0.0520	0.64	1.40	0.255	11.04	4.88	58.82	24.53	110.28	24.00	242.39	48.07	0.400	1.525
LDGH006	0.579	0.0140	8.29	0.0300	0.44	1.42	0.405	7.92	3.12	45.00	18.82	94.07	23.88	266.56	58.64	0.229	2.528
LDGH007	0.531	0.0041	8.90	0.0660	1.44	3.22	0.500	20.01	6.76	83.75	35.38	161.48	33.63	340.12	68.16	0.430	1.234
LDGH008	0.376	0.0103	4.99	0.0089	0.24	0.264	0.194	2.98	1.129	20.82	9.47	50.83	14.97	185.77	44.75	0.353	1.065
LDGH009	0.729	0.1910	9.42	0.1400	1.12	0.80	0.366	4.29	1.82	26.34	12.76	71.21	19.73	262.52	63.53	0.678	1.075
LDGH010	0.686	0.0022	8.86	0.0310	0.74	2.68	0.402	13.14	5.82	71.13	28.62	129.41	28.41	277.03	55.91	0.281	2.441
LDGH011	0.437	0.0072	7.99	0.0590	1.61	4.06	0.740	17.40	7.02	88.95	33.61	150.17	32.25	308.09	59.05	0.276	1.583
LDGH012	0.247	0.0480	4.05	0.0360	0.30	0.44	0.300	2.00	0.71	11.85	6.10	36.06	10.05	125.14	28.95	0.239	1.033
LDGH013	0.343	0.5660	9.21	0.4370	2.81	1.99	0.671	8.48	3.02	39.17	16.19	83.05	20.91	243.41	55.77	0.341	1.005
LDGH014	0.651	0.0090	7.55	0.0560	1.07	2.90	0.392	15.74	5.93	70.31	29.03	136.11	28.99	276.70	57.08	0.420	1.550
LDGH015	0.356	0.2410	7.24	0.0700	0.53	2.12	0.496	11.15	4.21	54.31	22.12	101.51	21.37	216.34	42.33	0.201	1.771
LDGH016	0.937	0.0032	8.57	0.0350	0.40	0.92	0.209	6.53	2.87	36.90	15.43	76.46	17.50	196.07	39.38	0.267	3.509
LDGH017	0.476	0.0540	6.54	0.0260	0.32	0.57	0.207	4.72	2.21	27.76	13.83	70.25	17.49	184.82	41.07	0.224	2.125

图7 老硐沟金矿床Ⅱ矿段辉绿岩与蚀变闪长玢岩锆石稀土元素配分曲线(据Sun等[21]) (a)辉绿岩;(b)蚀变闪长玢岩

Fig.7 REE distribution patterns of diabase and altered diorite porphyrite from the Laodonggou ore section II (after Sun et al[21])

表3 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石Lu-Hf同位素测试结果

Table 3 Zircon Lu-Hf isotope data of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ

分析点号	²⁰⁶Pb/²³⁸U 年龄(Ma)	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf±2σ	¹⁷⁶Hf/¹⁷⁷Hf	I_Hf	ε_Hf(t)	T_DM1 (Ma)	T_DM2 (Ma)	f_Lu/Hf
LDGH-6-02	288	0.035402	0.001217±0.000018	0.282749	0.282749	-0.82	676	1070	-0.96
LDGH-6-03	290	0.027025	0.000931±0.000018	0.282668	0.282668	-3.69	782	1247	-0.97
LDGH-6-04	291	0.021374	0.000803±0.000017	0.282758	0.282758	-0.49	656	1050	-0.98
LDGH-6-06	291	0.021978	0.000782±0.000017	0.282735	0.282735	-1.30	687	1100	-0.98
LDGH-6-07	286	0.026562	0.000900±0.000021	0.282791	0.282791	0.68	613	978	-0.97
LDGH-6-08	284	0.022164	0.000776±0.000018	0.282733	0.282733	-1.37	690	1104	-0.98
LDGH-6-09	287	0.019002	0.000704±0.000016	0.282714	0.282714	-2.05	714	1146	-0.98
LDGH-6-10	284	0.012006	0.000512±0.000014	0.282760	0.282760	-0.41	648	1045	-0.98
LDGH-6-11	284	0.017478	0.000591±0.000018	0.282756	0.282756	-0.55	655	1054	-0.98
LDGH-6-13	284	0.024901	0.000805±0.000016	0.282751	0.282751	-0.74	666	1065	-0.98
LDGH-6-14	286	0.023231	0.000748±0.000019	0.282765	0.282765	-0.26	647	1036	-0.98
LDGH-6-15	291	0.046419	0.001533±0.000017	0.282753	0.282753	-0.67	676	1060	-0.95
LDGH-6-16	284	0.017657	0.000687±0.000017	0.282800	0.282800	0.97	598	960	-0.98
LDGH-6-17	284	0.035624	0.001131±0.000018	0.282764	0.282764	-0.29	654	1037	-0.97
LDGH-6-18	284	0.024757	0.000803±0.000017	0.282768	0.282768	-0.16	644	1030	-0.98
LDGH-6-19	291	0.027720	0.000880±0.000020	0.282769	0.282769	-0.12	644	1027	-0.97
LDGH-6-20	287	0.027530	0.000885±0.000017	0.282794	0.282794	0.77	609	973	-0.97
LDGS06-01	241	0.024462	0.000821±0.000018	0.282684	0.282684	-3.12	758	1212	-0.98
LDGS06-02	241	0.022228	0.000738±0.000016	0.282665	0.282665	-3.80	782	1253	-0.98
LDGS06-03	247	0.028035	0.000919±0.000017	0.282715	0.282715	-2.01	717	1143	-0.97
LDGS06-04	243	0.014678	0.000486±0.000015	0.282741	0.282741	-1.09	674	1088	-0.99
LDGS06-05	242	0.025871	0.000881±0.000019	0.282715	0.282715	-2.01	716	1143	-0.97
LDGS06-06	244	0.018947	0.000638±0.000019	0.282732	0.282732	-1.40	689	1106	-0.98
LDGS06-07	244	0.022001	0.000714±0.000019	0.282695	0.282695	-2.71	740	1186	-0.98
LDGS06-08	245	0.015046	0.000500±0.000016	0.282713	0.282713	-2.08	712	1148	-0.98
LDGS06-09	244	0.022465	0.000738±0.000018	0.282706	0.282706	-2.32	725	1163	-0.98
LDGS06-10	241	0.015798	0.000522±0.000018	0.282677	0.282677	-3.34	761	1226	-0.98
LDGS06-11	244	0.020904	0.000701±0.000017	0.282708	0.282708	-2.26	722	1159	-0.98
LDGS06-12	243	0.024657	0.000822±0.000017	0.282723	0.282723	-1.74	705	1127	-0.98
LDGS06-13	247	0.018107	0.000592±0.000019	0.282674	0.282674	-3.45	766	1232	-0.98
LDGS06-14	241	0.021953	0.000735±0.000018	0.282710	0.282710	-2.21	721	1156	-0.98
LDGS06-15	247	0.017750	0.000584±0.000019	0.282637	0.282637	-4.76	816	1313	-0.98
LDGS06-16	241	0.023922	0.000821±0.000019	0.282721	0.282721	-1.82	708	1132	-0.98
LDGS06-17	245	0.022508	0.000722±0.000017	0.282695	0.282695	-2.73	741	1188	-0.98
LDGS06-18	243	0.023087	0.000771±0.000021	0.282734	0.282734	-1.34	689	1103	-0.98
LDGS06-19	247	0.022690	0.000746±0.000019	0.282702	0.282702	-2.49	732	1173	-0.98
LDGS06-20	243	0.019227	0.000655±0.000019	0.282740	0.282740	-1.14	679	1090	-0.98
LDGS06-21	245	0.015717	0.000529±0.000016	0.282733	0.282733	-1.37	685	1105	-0.98
LDGS06-22	242	0.015215	0.000511±0.000018	0.282693	0.282693	-2.81	740	1193	-0.98
LDGS06-23	243	0.027759	0.000925±0.000019	0.282706	0.282706	-2.34	730	1164	-0.97
LDGS06-24	244	0.019707	0.000671±0.000017	0.282744	0.282744	-1.01	674	1082	-0.98
LDGS06-25	245	0.022723	0.000776±0.000018	0.282716	0.282716	-2.00	714	1143	-0.98
LDGS06-26	242	0.025858	0.000854±0.000019	0.282724	0.282724	-1.70	704	1124	-0.97
LDGS06-27	241	0.026794	0.000892±0.000017	0.282651	0.282651	-4.27	803	1282	-0.97
LDGS06-28	247	0.024813	0.000844±0.000017	0.282691	0.282691	-2.86	748	1196	-0.97
LDGS06-29	244	0.029544	0.000980±0.000018	0.282770	0.282770	-0.07	643	1024	-0.97
LDGS06-30	240	0.020302	0.000675±0.000019	0.282707	0.282707	-2.29	723	1161	-0.98

表3 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石Lu-Hf同位素测试结果

Table 3 Zircon Lu-Hf isotope data of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ

分析点号	²⁰⁶Pb/²³⁸U 年龄(Ma)	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf±2σ	¹⁷⁶Hf/¹⁷⁷Hf	I_Hf	ε_Hf(t)	T_DM1 (Ma)	T_DM2 (Ma)	f_Lu/Hf
LDGH-6-02	288	0.035402	0.001217±0.000018	0.282749	0.282749	-0.82	676	1070	-0.96
LDGH-6-03	290	0.027025	0.000931±0.000018	0.282668	0.282668	-3.69	782	1247	-0.97
LDGH-6-04	291	0.021374	0.000803±0.000017	0.282758	0.282758	-0.49	656	1050	-0.98
LDGH-6-06	291	0.021978	0.000782±0.000017	0.282735	0.282735	-1.30	687	1100	-0.98
LDGH-6-07	286	0.026562	0.000900±0.000021	0.282791	0.282791	0.68	613	978	-0.97
LDGH-6-08	284	0.022164	0.000776±0.000018	0.282733	0.282733	-1.37	690	1104	-0.98
LDGH-6-09	287	0.019002	0.000704±0.000016	0.282714	0.282714	-2.05	714	1146	-0.98
LDGH-6-10	284	0.012006	0.000512±0.000014	0.282760	0.282760	-0.41	648	1045	-0.98
LDGH-6-11	284	0.017478	0.000591±0.000018	0.282756	0.282756	-0.55	655	1054	-0.98
LDGH-6-13	284	0.024901	0.000805±0.000016	0.282751	0.282751	-0.74	666	1065	-0.98
LDGH-6-14	286	0.023231	0.000748±0.000019	0.282765	0.282765	-0.26	647	1036	-0.98
LDGH-6-15	291	0.046419	0.001533±0.000017	0.282753	0.282753	-0.67	676	1060	-0.95
LDGH-6-16	284	0.017657	0.000687±0.000017	0.282800	0.282800	0.97	598	960	-0.98
LDGH-6-17	284	0.035624	0.001131±0.000018	0.282764	0.282764	-0.29	654	1037	-0.97
LDGH-6-18	284	0.024757	0.000803±0.000017	0.282768	0.282768	-0.16	644	1030	-0.98
LDGH-6-19	291	0.027720	0.000880±0.000020	0.282769	0.282769	-0.12	644	1027	-0.97
LDGH-6-20	287	0.027530	0.000885±0.000017	0.282794	0.282794	0.77	609	973	-0.97
LDGS06-01	241	0.024462	0.000821±0.000018	0.282684	0.282684	-3.12	758	1212	-0.98
LDGS06-02	241	0.022228	0.000738±0.000016	0.282665	0.282665	-3.80	782	1253	-0.98
LDGS06-03	247	0.028035	0.000919±0.000017	0.282715	0.282715	-2.01	717	1143	-0.97
LDGS06-04	243	0.014678	0.000486±0.000015	0.282741	0.282741	-1.09	674	1088	-0.99
LDGS06-05	242	0.025871	0.000881±0.000019	0.282715	0.282715	-2.01	716	1143	-0.97
LDGS06-06	244	0.018947	0.000638±0.000019	0.282732	0.282732	-1.40	689	1106	-0.98
LDGS06-07	244	0.022001	0.000714±0.000019	0.282695	0.282695	-2.71	740	1186	-0.98
LDGS06-08	245	0.015046	0.000500±0.000016	0.282713	0.282713	-2.08	712	1148	-0.98
LDGS06-09	244	0.022465	0.000738±0.000018	0.282706	0.282706	-2.32	725	1163	-0.98
LDGS06-10	241	0.015798	0.000522±0.000018	0.282677	0.282677	-3.34	761	1226	-0.98
LDGS06-11	244	0.020904	0.000701±0.000017	0.282708	0.282708	-2.26	722	1159	-0.98
LDGS06-12	243	0.024657	0.000822±0.000017	0.282723	0.282723	-1.74	705	1127	-0.98
LDGS06-13	247	0.018107	0.000592±0.000019	0.282674	0.282674	-3.45	766	1232	-0.98
LDGS06-14	241	0.021953	0.000735±0.000018	0.282710	0.282710	-2.21	721	1156	-0.98
LDGS06-15	247	0.017750	0.000584±0.000019	0.282637	0.282637	-4.76	816	1313	-0.98
LDGS06-16	241	0.023922	0.000821±0.000019	0.282721	0.282721	-1.82	708	1132	-0.98
LDGS06-17	245	0.022508	0.000722±0.000017	0.282695	0.282695	-2.73	741	1188	-0.98
LDGS06-18	243	0.023087	0.000771±0.000021	0.282734	0.282734	-1.34	689	1103	-0.98
LDGS06-19	247	0.022690	0.000746±0.000019	0.282702	0.282702	-2.49	732	1173	-0.98
LDGS06-20	243	0.019227	0.000655±0.000019	0.282740	0.282740	-1.14	679	1090	-0.98
LDGS06-21	245	0.015717	0.000529±0.000016	0.282733	0.282733	-1.37	685	1105	-0.98
LDGS06-22	242	0.015215	0.000511±0.000018	0.282693	0.282693	-2.81	740	1193	-0.98
LDGS06-23	243	0.027759	0.000925±0.000019	0.282706	0.282706	-2.34	730	1164	-0.97
LDGS06-24	244	0.019707	0.000671±0.000017	0.282744	0.282744	-1.01	674	1082	-0.98
LDGS06-25	245	0.022723	0.000776±0.000018	0.282716	0.282716	-2.00	714	1143	-0.98
LDGS06-26	242	0.025858	0.000854±0.000019	0.282724	0.282724	-1.70	704	1124	-0.97
LDGS06-27	241	0.026794	0.000892±0.000017	0.282651	0.282651	-4.27	803	1282	-0.97
LDGS06-28	247	0.024813	0.000844±0.000017	0.282691	0.282691	-2.86	748	1196	-0.97
LDGS06-29	244	0.029544	0.000980±0.000018	0.282770	0.282770	-0.07	643	1024	-0.97
LDGS06-30	240	0.020302	0.000675±0.000019	0.282707	0.282707	-2.29	723	1161	-0.98

表4 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩岩石地球化学数据表(%)

Table 4 Whole-rock geochemical data of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ (%)

组分/参数	LDGS-11	LDGS-22	LDGS-33	LDGS-44	LDGS-55	LDGH-16	LDGH-27	LDGH-38	LDGH-49	LDGH-510
SiO₂	63.23	62.72	63.82	63.19	61.84	51.69	48.79	50.66	51.12	51.14
TiO₂	0.49	0.50	0.46	0.50	0.53	2.24	2.41	2.44	2.36	3.00
Al₂O₃	14.84	14.85	14.68	14.87	15.01	13.90	13.95	13.07	13.87	12.85
TFe₂O₃	3.38	3.61	3.34	3.55	3.72	11.73	11.65	11.67	11.75	12.51
MnO	0.04	0.05	0.04	0.04	0.04	0.12	0.14	0.12	0.13	0.14
MgO	2.63	2.74	2.54	2.62	2.90	4.84	4.92	4.30	4.74	4.73
CaO	2.87	2.96	2.85	3.01	2.58	6.23	7.13	6.17	6.18	6.03
Na₂O	2.56	2.38	2.69	2.73	2.09	1.94	1.74	2.46	2.57	2.54
K₂O	4.60	4.50	4.54	4.43	4.22	1.43	1.66	1.35	1.40	1.39
P₂O₅	0.23	0.23	0.21	0.23	0.24	0.28	0.32	0.32	0.30	0.34
烧失量	4.22	4.54	3.90	3.90	5.69	4.77	6.31	6.42	4.70	4.50
总量	99.08	99.07	99.07	99.08	98.85	99.15	99.02	99.00	99.12	99.17
全碱	7.16	6.88	7.23	7.17	6.31	3.36	3.40	3.81	3.98	3.93
K₂O/Na₂O	1.80	1.89	1.69	1.62	2.01	0.74	0.95	0.55	0.55	0.54
A/CNK	1.03	1.05	1.01	1.01	1.18	0.87	0.79	0.78	0.82	0.77
A/NK	1.62	1.69	1.57	1.60	1.87	2.94	3.00	2.37	2.41	2.26
V	54.30	53.80	48.7	52.30	57.30	123.00	115.00	117.00	113.00	139.00
Cr	64.60	69.30	58.4	64.00	85.70	109.00	97.60	89.00	107.00	81.10
Co	7.74	8.02	6.71	8.02	8.39	29.20	28.20	27.90	26.90	29.30
Ni	32.30	32.00	29.4	31.70	35.30	54.90	51.30	47.60	53.30	47.70
Ga	18.20	17.90	17.80	17.80	18.10	24.6	24.60	24.30	23.70	24.60
Li	39.50	38.40	33.30	38.60	32.80	23.70	25.30	31.90	21.20	20.10
Be	3.04	2.94	2.88	2.92	2.44	1.35	1.50	1.44	1.33	1.73
Cs	1132.91	1008.86	1067.09	1316.46	615.19	179.75	222.78	225.32	116.46	220.25
Rb	266.14	264.57	256.69	245.67	203.15	69.61	77.32	57.48	55.75	66.46
Th	181.18	170.59	172.94	184.71	156.47	28.94	32.00	32.71	38.47	34.82
U	162.86	168.57	169.05	176.19	111.43	27.14	28.57	28.57	26.67	30.95
Nb	10.62	10.01	10.24	9.92	9.65	32.82	39.69	40.25	35.20	42.64
Ta	14.63	13.90	14.15	13.66	12.68	33.66	40.24	40.73	36.59	44.15
La	61.28	57.93	58.81	66.96	63.61	25.18	27.80	27.80	24.31	29.26
Ce	47.38	42.20	45.80	51.61	51.61	20.73	22.70	22.42	20.23	23.72
Pr	120.99	115.49	116.20	131.83	131.41	65.77	71.83	70.99	64.65	76.90
Sr	31.00	30.43	33.74	35.36	26.73	14.69	16.30	12.56	16.40	16.97
Nd	24.52	23.41	23.56	26.88	26.51	18.02	19.65	19.28	17.73	20.83
Zr	30.98	22.32	22.23	24.20	21.70	17.77	19.46	20.18	18.13	20.98
Hf	21.59	16.80	16.73	17.99	15.95	14.05	15.08	15.60	14.40	16.67
Sm	12.12	11.37	11.49	13.22	13.06	15.38	16.87	16.33	15.43	17.93
Eu	8.87	8.81	8.81	10.54	9.35	13.93	15.00	14.52	13.57	15.48
Gd	7.99	7.57	7.72	8.83	8.44	12.03	13.15	12.42	12.01	13.86
Tb	5.00	4.81	4.81	5.46	5.28	10.00	10.74	10.09	10.00	11.30
Dy	3.49	3.38	3.41	3.79	3.60	7.82	8.45	7.77	7.86	8.71
Y	2.73	2.64	2.64	2.88	2.70	5.25	5.49	5.16	5.05	5.54
Ho	2.87	2.74	2.74	3.05	2.87	6.04	6.40	6.04	5.98	6.52
Er	2.98	2.85	2.83	3.06	2.92	5.19	5.38	5.15	5.15	5.56
Tm	2.70	2.43	2.57	2.70	2.57	3.92	3.92	4.05	3.92	4.19
Yb	2.52	2.45	2.41	2.56	2.41	3.35	3.33	3.35	3.37	3.55
Lu	2.70	2.57	2.57	2.70	2.43	3.11	2.97	3.11	3.11	3.24
La	177.64	167.93	170.46	194.09	184.39	73.00	80.59	80.59	70.46	84.81
Ce	137.42	122.39	132.84	149.67	149.67	60.13	65.85	65.03	58.66	68.79
Pr	90.42	86.32	86.84	98.53	98.21	49.16	53.68	53.05	48.32	57.47
Nd	71.09	67.88	68.31	77.94	76.87	52.25	56.96	55.89	51.39	60.39
Sm	35.16	33.01	33.33	38.37	37.91	44.64	48.95	47.39	44.77	52.03
Eu	25.69	25.52	25.52	30.52	27.07	40.34	43.45	42.07	39.31	44.83
Gd	23.16	21.95	22.38	25.60	24.48	34.89	38.15	36.01	34.84	40.19
Tb	14.44	13.90	13.90	15.78	15.24	28.88	31.02	29.14	28.88	32.62
Dy	10.12	9.80	9.88	10.98	10.43	22.68	24.53	22.56	22.80	25.28
Ho	8.30	7.95	7.95	8.83	8.30	17.49	18.55	17.49	17.31	18.90
Er	8.64	8.28	8.22	8.88	8.46	15.05	15.59	14.92	14.92	16.13
Tm	7.84	7.06	7.45	7.84	7.45	11.37	11.37	11.76	11.37	12.16
Yb	7.29	7.12	7.00	7.41	7.00	9.71	9.65	9.71	9.76	10.29
Lu	7.87	7.48	7.48	7.87	7.09	9.06	8.66	9.06	9.06	9.45
∑REE	186.27	172.05	179.44	203.27	199.58	112.00	122.12	119.59	109.98	128.36
LREE	174.86	161.13	168.43	191.00	187.9	92.34	101.11	99.73	90.32	106.42
HREE	11.41	10.92	11.01	12.27	11.68	19.66	21.01	19.86	19.66	21.94
LREE/HREE	15.33	14.76	15.30	15.57	16.09	4.70	4.81	5.02	4.59	4.85
(La/Yb)_N	24.35	23.59	24.35	26.19	26.34	7.52	8.35	8.30	7.22	8.24
δEu	0.90	0.95	0.93	0.97	0.89	1.02	1.01	1.02	1.00	0.98

表4 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩岩石地球化学数据表(%)

Table 4 Whole-rock geochemical data of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ (%)

组分/参数	LDGS-11	LDGS-22	LDGS-33	LDGS-44	LDGS-55	LDGH-16	LDGH-27	LDGH-38	LDGH-49	LDGH-510
SiO₂	63.23	62.72	63.82	63.19	61.84	51.69	48.79	50.66	51.12	51.14
TiO₂	0.49	0.50	0.46	0.50	0.53	2.24	2.41	2.44	2.36	3.00
Al₂O₃	14.84	14.85	14.68	14.87	15.01	13.90	13.95	13.07	13.87	12.85
TFe₂O₃	3.38	3.61	3.34	3.55	3.72	11.73	11.65	11.67	11.75	12.51
MnO	0.04	0.05	0.04	0.04	0.04	0.12	0.14	0.12	0.13	0.14
MgO	2.63	2.74	2.54	2.62	2.90	4.84	4.92	4.30	4.74	4.73
CaO	2.87	2.96	2.85	3.01	2.58	6.23	7.13	6.17	6.18	6.03
Na₂O	2.56	2.38	2.69	2.73	2.09	1.94	1.74	2.46	2.57	2.54
K₂O	4.60	4.50	4.54	4.43	4.22	1.43	1.66	1.35	1.40	1.39
P₂O₅	0.23	0.23	0.21	0.23	0.24	0.28	0.32	0.32	0.30	0.34
烧失量	4.22	4.54	3.90	3.90	5.69	4.77	6.31	6.42	4.70	4.50
总量	99.08	99.07	99.07	99.08	98.85	99.15	99.02	99.00	99.12	99.17
全碱	7.16	6.88	7.23	7.17	6.31	3.36	3.40	3.81	3.98	3.93
K₂O/Na₂O	1.80	1.89	1.69	1.62	2.01	0.74	0.95	0.55	0.55	0.54
A/CNK	1.03	1.05	1.01	1.01	1.18	0.87	0.79	0.78	0.82	0.77
A/NK	1.62	1.69	1.57	1.60	1.87	2.94	3.00	2.37	2.41	2.26
V	54.30	53.80	48.7	52.30	57.30	123.00	115.00	117.00	113.00	139.00
Cr	64.60	69.30	58.4	64.00	85.70	109.00	97.60	89.00	107.00	81.10
Co	7.74	8.02	6.71	8.02	8.39	29.20	28.20	27.90	26.90	29.30
Ni	32.30	32.00	29.4	31.70	35.30	54.90	51.30	47.60	53.30	47.70
Ga	18.20	17.90	17.80	17.80	18.10	24.6	24.60	24.30	23.70	24.60
Li	39.50	38.40	33.30	38.60	32.80	23.70	25.30	31.90	21.20	20.10
Be	3.04	2.94	2.88	2.92	2.44	1.35	1.50	1.44	1.33	1.73
Cs	1132.91	1008.86	1067.09	1316.46	615.19	179.75	222.78	225.32	116.46	220.25
Rb	266.14	264.57	256.69	245.67	203.15	69.61	77.32	57.48	55.75	66.46
Th	181.18	170.59	172.94	184.71	156.47	28.94	32.00	32.71	38.47	34.82
U	162.86	168.57	169.05	176.19	111.43	27.14	28.57	28.57	26.67	30.95
Nb	10.62	10.01	10.24	9.92	9.65	32.82	39.69	40.25	35.20	42.64
Ta	14.63	13.90	14.15	13.66	12.68	33.66	40.24	40.73	36.59	44.15
La	61.28	57.93	58.81	66.96	63.61	25.18	27.80	27.80	24.31	29.26
Ce	47.38	42.20	45.80	51.61	51.61	20.73	22.70	22.42	20.23	23.72
Pr	120.99	115.49	116.20	131.83	131.41	65.77	71.83	70.99	64.65	76.90
Sr	31.00	30.43	33.74	35.36	26.73	14.69	16.30	12.56	16.40	16.97
Nd	24.52	23.41	23.56	26.88	26.51	18.02	19.65	19.28	17.73	20.83
Zr	30.98	22.32	22.23	24.20	21.70	17.77	19.46	20.18	18.13	20.98
Hf	21.59	16.80	16.73	17.99	15.95	14.05	15.08	15.60	14.40	16.67
Sm	12.12	11.37	11.49	13.22	13.06	15.38	16.87	16.33	15.43	17.93
Eu	8.87	8.81	8.81	10.54	9.35	13.93	15.00	14.52	13.57	15.48
Gd	7.99	7.57	7.72	8.83	8.44	12.03	13.15	12.42	12.01	13.86
Tb	5.00	4.81	4.81	5.46	5.28	10.00	10.74	10.09	10.00	11.30
Dy	3.49	3.38	3.41	3.79	3.60	7.82	8.45	7.77	7.86	8.71
Y	2.73	2.64	2.64	2.88	2.70	5.25	5.49	5.16	5.05	5.54
Ho	2.87	2.74	2.74	3.05	2.87	6.04	6.40	6.04	5.98	6.52
Er	2.98	2.85	2.83	3.06	2.92	5.19	5.38	5.15	5.15	5.56
Tm	2.70	2.43	2.57	2.70	2.57	3.92	3.92	4.05	3.92	4.19
Yb	2.52	2.45	2.41	2.56	2.41	3.35	3.33	3.35	3.37	3.55
Lu	2.70	2.57	2.57	2.70	2.43	3.11	2.97	3.11	3.11	3.24
La	177.64	167.93	170.46	194.09	184.39	73.00	80.59	80.59	70.46	84.81
Ce	137.42	122.39	132.84	149.67	149.67	60.13	65.85	65.03	58.66	68.79
Pr	90.42	86.32	86.84	98.53	98.21	49.16	53.68	53.05	48.32	57.47
Nd	71.09	67.88	68.31	77.94	76.87	52.25	56.96	55.89	51.39	60.39
Sm	35.16	33.01	33.33	38.37	37.91	44.64	48.95	47.39	44.77	52.03
Eu	25.69	25.52	25.52	30.52	27.07	40.34	43.45	42.07	39.31	44.83
Gd	23.16	21.95	22.38	25.60	24.48	34.89	38.15	36.01	34.84	40.19
Tb	14.44	13.90	13.90	15.78	15.24	28.88	31.02	29.14	28.88	32.62
Dy	10.12	9.80	9.88	10.98	10.43	22.68	24.53	22.56	22.80	25.28
Ho	8.30	7.95	7.95	8.83	8.30	17.49	18.55	17.49	17.31	18.90
Er	8.64	8.28	8.22	8.88	8.46	15.05	15.59	14.92	14.92	16.13
Tm	7.84	7.06	7.45	7.84	7.45	11.37	11.37	11.76	11.37	12.16
Yb	7.29	7.12	7.00	7.41	7.00	9.71	9.65	9.71	9.76	10.29
Lu	7.87	7.48	7.48	7.87	7.09	9.06	8.66	9.06	9.06	9.45
∑REE	186.27	172.05	179.44	203.27	199.58	112.00	122.12	119.59	109.98	128.36
LREE	174.86	161.13	168.43	191.00	187.9	92.34	101.11	99.73	90.32	106.42
HREE	11.41	10.92	11.01	12.27	11.68	19.66	21.01	19.86	19.66	21.94
LREE/HREE	15.33	14.76	15.30	15.57	16.09	4.70	4.81	5.02	4.59	4.85
(La/Yb)_N	24.35	23.59	24.35	26.19	26.34	7.52	8.35	8.30	7.22	8.24
δEu	0.90	0.95	0.93	0.97	0.89	1.02	1.01	1.02	1.00	0.98

图8 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩SiO2-K2O图((a),据Richwood[26])和铝饱和指数图((b),据 Maniar等[27])

Fig.8 SiO2-K2O diagram of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ ((a), basemap from Richwood[26]), and aluminum saturation index diagram ((b), basemap from Maniar et al.[27])

图9 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩的稀土元素配分曲线(a)和微量元素蛛网图(b)

Fig.9 Chondrite-normalized REE distribution patterns (a) and primitive mantle-normalized multi-elements spidergram (b) of altered diorite porphyrite and diabase from the Laodonggou ore section Ⅱ

图10 老硐沟金矿床金矿体与蚀变闪长玢岩穿切关系 (a)矿石手标本;(b)金矿脉充填于闪长玢岩裂隙中;(c)10号勘探线剖面图

Fig.10 Crosscutting relationship between gold ore body and altered diorite porphyrite from the Laodonggou gold deposit

图11 老硐沟金矿床Ⅱ矿段蚀变闪长玢岩与辉绿岩锆石εHf(t)-206Pb/238U年龄图解

Fig.11 Zircon εHf(t)-206Pb/238U diagram for the altered diorite porphyrite and diabase in the Laodonggou ore section Ⅱ

图12 老硐沟金矿床闪长玢岩与辉绿岩构造判别图解(底图据Pearce[33]和Wood[34]) (a1)(b1)蚀变闪长玢岩;(a2)(b2)辉绿岩;CAB.钙碱性岛弧玄武岩;IAT.岛弧拉斑玄武岩;N-MORB.正常洋中脊玄武岩;E-MORB.富集洋中脊玄武岩;WPT.板内拉斑玄武岩;WPAB.板内碱性玄武岩

Fig.12 Tectonic discrimination diagrams for the Laodonggou gold deposit (basemap from Pearce[33] and Wood[34])

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内蒙古北山地区中基性岩脉年代学和地球化学特征:对塔里木板块北缘构造演化的启示

Geochronology and Geochemistry of the Intermediate-basic Dikes in the Beishan Area, Inner Mongolia: Implications for Tectonic Evolution of the Northern Margin of the Tarim Plate

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