湖南铜山岭层状钨多金属矽卡岩形成时代、成因机制及其找矿启示

谭富诚; 孔华; 刘飚; 吴堑虹; 刘玉国; 杨齐智

doi:10.19509/j.cnki.dzkq.tb20220519

湖南铜山岭层状钨多金属矽卡岩形成时代、成因机制及其找矿启示

doi: 10.19509/j.cnki.dzkq.tb20220519

谭富诚^{1a, 1b,},
孔华^{1a, 1b, ,},
刘飚^{1a, 1b},
吴堑虹^{1a, 1b},
刘玉国^{1a, 1b},
杨齐智²

1a.
中南大学地球科学与信息物理学院, 长沙 410083
1b.
中南大学有色金属成矿预测与地质环境监测教育部重点实验室, 长沙 410083
2.
湖南省矿产资源调查所, 湖南郴州 423002

基金项目:

国家重点研发计划 2018YFC0603901

中南大学研究生自主创新项目 2022ZZTS0458

详细信息

作者简介:
谭富诚, E-mail: Tanfucheng@csu.edu.cn

通讯作者:
孔华, E-mail: konghua@csu.edu.cn

中图分类号: P618.6
计量
- 文章访问数: 558
- PDF下载量: 47
- 被引次数: 0
出版历程
- 收稿日期: 2022-09-13
- 录用日期: 2023-04-03
- 修回日期: 2023-03-23

Timing and genesis of the Tongshanling stratiform W-Mo skarn deposit in Hunan Province: Implications for exploration

TAN Fucheng^{1a, 1b
,},
KONG Hua^{1a, 1b
, ,},
LIU Biao^{1a, 1b},
WU Qianhong^{1a, 1b},
LIU Yuguo^{1a, 1b},
YANG Qizhi²

1a.
Schoolof Geoscience and Info-Physics, Ministry of Education, Central South University, Changsha 410083, China
1b.
Key Laboratory of Metallogenic Prediction of Nonferrous Metalsand Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China
2.
Mineral Resources Investigation Institute of Hunan Province, Chenzhou Hunan 423002, China

More Information

Author Bio:
TAN Fucheng, E-mail: Tanfucheng@csu.edu.cn

Corresponding author: KONG Hua, E-mail: konghua@csu.edu.cn

摘要

摘要:
湖南铜山岭矿床位于南岭成矿带西段, 是与Ⅰ型花岗闪长岩有关的矽卡岩型铜多金属矿床。近年在远离花岗闪长岩体的棋梓桥组灰岩地层中发现了厚层状矽卡岩型钨钼矿体, 其地质特征、矿物组合与金属类型均与岩体接触带型矿体不同。通过系统的野外观察、显微鉴定、石榴石原位U-Pb定年、白钨矿LA-ICP-MS微量元素分析对该矿床矽卡岩形成时代、成因机制进行了研究。结果表明: (1)矽卡岩成矿作用可划分为石榴石矽卡岩、绿帘石绿泥石矽卡岩、石英硫化物、石英方解石4个阶段; (2)石榴石U-Pb谐和年龄为(160.4±4.2) Ma(MSWD=0.79), 明显晚于花岗闪长岩体(约167 Ma), 与花岗斑岩(约161 Ma)的年龄一致; (3)核部石榴石稀土元素配分型式为轻稀土元素富集、重稀土元素平坦型, 与花岗斑岩全岩稀土元素配分型式相似, 边缘石榴石的稀土元素配分型式为轻稀土元素亏损、重稀土元素平坦型, 与接触带矽卡岩中石榴石不同; (4)与绿帘石共生的白钨矿主要可分为3个世代, 3个世代的白钨矿稀土元素配分型式均为轻稀土元素富集、重稀土元素亏损型, 但稀土元素总质量分数从第一阶段(Sch1-a, 332×10^-6~353×10^-6)到第二阶段(Sch1-b, 144×10^-6~301×10^-6)到第三阶段(Sch1-c, 4.05×10^-6~31.8×10^-6)呈显著渐进式下降趋势, 与绿泥石共生的白钨矿(Sch2)稀土元素配分型式显示轻稀土元素富集, 重稀土元素亏损, 稀土元素总质量分数为51.2×10^-6~139×10^-6; (5)钨钼矿化主要集中在退变质阶段, 其中Sch1-b及Sch2阶段具有较高的氧逸度, 为钨沉淀的主要阶段, Sch1-a与Sch1-c阶段氧逸度较低, 为钼沉淀的主要阶段。综合分析认为, 层状矽卡岩与铜山岭及魏家接触带矽卡岩均不为同一成矿系统, 可能与分异程度更高的花岗斑岩有关, 未来铜山岭矿床深边部找矿应该更加关注晚期花岗斑岩体。
- 层状矽卡岩 /
- 石榴石 /
- 白钨矿 /
- LA-ICP-MS /
- 湖南铜山岭
Abstract: Objective
The Tongshanling deposit in the western Nanling metallogenic belt of Hunan Province is a skarn Cu polymetallic deposit related to Ⅰ-type granodiorite. Recently, a thick stratiform W-Mo skarn ore body has been found in the limestone of the Qiziqiao Formation far from the granodiorite intrusion. Its geological characteristics, mineral assemblages and genetic types are different from those of the ore bodies in the contact zone of the intrusion.
Methods
In this study, timing and genesis of the Tongshanling stratiform are analysed, through field investigation, microscopic identification, in situ U-Pb dating of garnet, and LA-ICP-MS trace element analysis of scheelite.
Results
The following four stages of mineralization are identified: garnet skarn, epidote and chlorite skarn, quartz sulfide and quartz calcite. The U-Pb concordant age of garnet is (160.4±4.2) Ma (MSWD=0.79), is significantly later than that of the granodiorite (~167 Ma) and similar to that of the granite porphyry (~161 Ma). The total rare earth element (ΣREE) distribution pattern of the garnet core is light rare earth element (LREE) enrichment and heavy rare earth element (HREE) flat and is similar to the whole-rock ΣREE model of granite porphyry. The ΣREE distribution pattern of garnet rims is LREE-depleted and is different from that of garnet in contact zone skarns. Scheelite associated with epidote can be divided into three stages. ΣREE modes of the three stages are all LREE enrichment and HREE depletion, but the ΣREE content decreases significantly from the first stage (Sch1-a, 332×10^-6-353×10^-6) to the second stage (Sch1-b, 144×10^-6-301×10^-6) and the third stage (Sch1-c, 4.05×10^-6-31.8×10^-6). Scheelite associated with chlorite (Sch2) shows LREE enrichment and HREE depletion, and their ΣREE content is 51.2×10^-6-139×10^-6. W-Mo mineralization is mainly concentrated in the retrograde stage. The Sch1-b and Sch2 stages have higher oxygen fugacities are the main stage of W mineralization, while the other stages (Sch1-a and Sch1-c) with lower oxygen fugacities are the main stage of Mo mineralization. Comprehensive analysis reveals that the stratiform skarn and contact zone skarn in the Tongshanling and Weijia deposits are different metallogenic systems. The stratiform skarn may be related to the granite porphyry with a relatively high degree of fractionation.
Conclusion
More attention should be given to the late granite porphyry in deep within and at the edge of the Tongshanling deposit.
- stratiform skarn /
- garnet /
- scheelite /
- LA-ICP-MS /
- Tongshanling in Hunan Province
注释:

所有作者声明不存在利益冲突。

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图 1 南岭地质简图^{[4, 7]}

1.侏罗纪-白垩纪地层；2.志留纪-三叠纪地层；3.前奥陶纪地层；4.加里东期花岗岩；5.印支期花岗岩；6.燕山早期花岗岩；7.燕山晚期花岗岩；8.断层；9.铜铅锌矿床；10.钨(锡)矿床；11.研究区；12.城市

Figure 1. Simplified geological map of the Nanling Range, South China

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图 2 铜山岭矿床地质图(a)及1301勘探线剖面图(b)^[1]

1.第四系；2.侏罗系-三叠系；3.二叠系；4.石炭系孟公坳组；5.石炭系梓门桥组；6.石炭系测水组；7.石炭系大塘阶；8.石炭系石磴子组；9.泥盆系孟公坳组；10.泥盆系锡矿山组；11.泥盆系佘田桥组；12.泥盆系棋梓桥组；13.石英斑岩；14.花岗闪长岩；15.花岗斑岩；16.矽卡岩；17.断层；18.褶皱；19.矿床；20.勘探线及编号；21.钻孔及编号；22.钨矿体；23.钼矿体；24.采样位置

Figure 2. Geological map (a) and cross section along Exploration Line 1301 (b) of the Tongshanling deposit

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图 3 铜山岭矿床层状矽卡岩及岩体宏观特征

a.石榴石矽卡岩；b.石榴石与石英密切共生；c.石英方解石绿泥石脉穿切石榴石矽卡岩；d.石英绿泥石脉及石榴石；e.黄铁矿脉、方铅矿叠加在矽卡岩上；f.方铅矿、白钨矿及晚期方解石；g.石英方解石共生，可见黄铁矿；h.铜山岭花岗闪长岩；i.层状花岗斑岩；Grt.石榴石；Ep.绿帘石；Q.石英；Chl.绿泥石；Gn.方铅矿；Py.黄铁矿；Sch.白钨矿；Cal.方解石

Figure 3. Macroscopic characteristics of the stratiform skarn and rock masses in the Tongshanling deposit

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图 4 铜山岭矿床层状矽卡岩及岩体显微特征

a.石榴石与石英共生，可见绿帘石及绿泥石等晚期矽卡岩矿物, 单偏光；b.石榴石集合体，可见蚀变, 正交偏光；c.白钨矿及晚期矽卡岩矿物, 单偏光；d.毒砂及少量黄铁矿及黄铜矿, 反射光；e.后期黄铁矿叠加在晚期矽卡岩上, 反射光；f.晚期方解石叠加绿泥石, 单偏光；g.铜山岭花岗闪长岩，可见黑云母、斜长石、石英, 单偏光；h.铜山岭ZK1301孔花岗斑岩，可见石英斑晶, 单偏光；i.铜山岭ZK1301孔花岗斑岩，可见石英、长石斑晶, 单偏光；Q.石英；Ep.绿帘石；Grt.石榴石；Bt.黑云母；Pl.斜长石；Py.黄铁矿；Apy.毒砂；Sch.白钨矿；Cpy.黄铜矿

Figure 4. Microscopic characteristics of the stratiform skarn and rock masses in the Tongshanling deposit

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图 5 铜山岭层状矽卡岩中与绿帘石及绿泥石共生的白钨矿颗粒的CL图像

Sch1-a, Sch1-b, Sch1-c为早期第一、二、三阶段白钨矿；Sch2为晚期白钨矿，下同

Figure 5. CL images of scheelite particles associated with epidote and chlorite in the Tongshanling stratiform skarn

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图 6 铜山岭层状矽卡岩中石榴石Tera-Wasserburg图下交点年龄(a)及加权平均年龄(b)图

Figure 6. Garnet U-Pb concordia age diagrams (a) and weighted average age diagram (b) of the Tongshanling stratiform skarns

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图 7 铜山岭层状、接触带及魏家接触带矽卡岩中石榴石三角分类图解(铜山岭及魏家接触带石榴石数据来源于文献[3, 40])

Pyr.镁铝榴石; Spe.锰铝榴石; Alm.铁铝榴石; Gro.钙铝榴石; And.钙铁榴石

Figure 7. Triangular classification diagram of garnets in the skarn of Tongshanling layer, contact zone and Weijia contact zone

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图 8 铜山岭层状、接触带及魏家接触带矽卡岩中石榴石及白钨矿稀土元素配分型式图解(b, c, h, i引自文献[3, 40]；球粒陨石标准化数值引自文献[41])

Figure 8. Chondrite-normalized REE patterns of garnet and scheelite in the skarn of the Tongshanling layer, contact zone and Weijia contact zone

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图 9 铜山岭层状矽卡岩中石榴石地球化学元素图解(球粒陨石标准化数值来源于文献[41])

Figure 9. Geochemical element diagram of garnets in the Tongshanling stratiform skarn

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图 10 铜山岭层状矽卡岩中白钨矿地球化学元素图解(球粒陨石标准化数值(N)来源于文献[41])

Figure 10. Geochemical element diagram of scheelite in the Tongshanling stratiform skarn

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图 11 铜山岭层状矽卡岩成矿模式图

Figure 11. Metallogenic model diagram of the Tongshanling stratiform skarn

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表 1 铜山岭层状矽卡岩中石榴石LA-ICP-MS年龄分析结果

Table 1. LA-ICP-MS age analysis results for garnets in the Tongshanling stratiform skarn

²³⁸U	²³²Th	²⁰⁶Pb	²⁰⁷Pb	²⁰⁸Pb	同位素比值				矫正年龄t/Ma
w_B/10^-6					²³⁸U/²⁰⁶Pb	1 σ	²⁰⁷Pb/²⁰⁶Pb	1 σ	t(²⁰⁷Pb)	1 σ
16.80	0.29	2.04	1.40	3.41	8.04	0.054 1	0.68	0.004 0	160.4	8.9
12.40	16.30	2.01	1.47	3.74	5.99	0.056 9	0.74	0.004 7	146.9	13.1
8.86	0.33	2.25	1.75	4.32	3.84	0.025 1	0.78	0.004 9	139.5	21.4
4.10	0.17	1.36	1.07	2.63	2.93	0.023 4	0.79	0.004 7	157.0	28.2
9.35	1.47	2.06	1.56	3.84	4.43	0.030 4	0.76	0.004 3	157.2	17.7
5.51	0.87	1.17	0.88	2.16	4.60	0.040 8	0.75	0.005 3	158.8	17.9
14.30	1.14	2.05	1.46	3.59	6.78	0.044 0	0.71	0.003 9	159.3	10.8
4.15	0.90	1.36	1.07	2.66	2.95	0.038 4	0.79	0.005 5	155.9	29.0
11.50	0.48	1.95	1.42	3.47	5.71	0.036 1	0.73	0.004 2	161.8	13.3
12.10	1.42	1.69	1.19	2.92	6.98	0.040 5	0.71	0.004 3	158.7	10.6
6.33	0.87	2.05	1.60	3.97	3.00	0.020 1	0.78	0.004 7	171.9	27.2
12.10	0.60	1.96	1.42	3.50	5.99	0.038 8	0.73	0.004 0	158.5	12.5
7.95	41.60	2.49	1.95	5.19	3.11	0.020 9	0.78	0.004 2	161.3	25.9
7.27	1.78	2.05	1.59	3.95	3.44	0.024 8	0.77	0.004 5	169.4	23.4
6.64	0.73	1.50	1.14	2.80	4.32	0.032 1	0.76	0.005 5	149.3	19.4
8.63	0.54	1.65	1.23	3.04	5.11	0.036 3	0.74	0.005 3	158.9	15.9
10.10	1.02	1.84	1.35	3.48	5.36	0.051 6	0.74	0.005 0	161.3	14.8
7.63	0.68	2.06	1.59	3.92	3.64	0.025 2	0.77	0.004 4	157.0	22.1
5.17	0.34	1.75	1.38	3.41	2.90	0.023 4	0.79	0.005 1	162.3	29.0
6.09	0.33	1.69	1.32	3.28	3.55	0.027 8	0.78	0.005 1	148.4	23.5
9.91	0.59	1.62	1.17	2.86	6.04	0.050 7	0.73	0.005 0	157.2	13.0
19.90	0.29	2.27	1.53	3.73	8.65	0.069 9	0.68	0.004 2	157.2	8.3
6.85	1.92	1.72	1.31	3.30	3.94	0.036 4	0.76	0.004 5	170.3	20.2
5.72	0.43	1.74	1.34	3.43	3.25	0.029 0	0.77	0.004 5	177.9	24.7
8.16	0.63	1.79	1.34	3.32	4.48	0.044 7	0.75	0.004 5	165.8	17.6
6.21	0.39	1.92	1.50	3.73	3.18	0.032 3	0.78	0.005 2	159.7	26.5
12.10	0.10	1.55	1.07	2.62	7.72	0.070 7	0.69	0.004 2	161.8	9.4
17.50	0.37	2.17	1.48	3.63	7.99	0.077 0	0.68	0.004 3	161.4	9.1
6.52	0.17	1.77	1.38	3.42	3.64	0.037 3	0.78	0.004 6	146.9	22.4
5.08	0.32	1.49	1.14	2.85	3.35	0.043 3	0.77	0.005 1	176.9	24.8
5.62	0.41	1.78	1.39	3.45	3.11	0.036 7	0.78	0.005 7	155.1	27.7
6.71	0.40	1.91	1.49	3.68	3.51	0.035 6	0.78	0.004 9	139.3	23.7
5.59	0.39	1.90	1.49	3.70	2.93	0.030 1	0.79	0.005 3	157.4	29.0
5.83	0.65	1.92	1.50	3.84	3.03	0.029 3	0.79	0.005 0	159.0	27.6
5.60	0.42	1.17	0.88	2.17	4.80	0.050 5	0.76	0.005 9	147.3	17.7
5.15	0.42	1.32	1.01	2.63	3.86	0.041 3	0.77	0.005 2	159.6	21.5
5.17	0.12	1.36	1.04	2.55	3.71	0.052 3	0.76	0.005 7	175.6	22.8
13.10	84.60	1.89	1.33	3.97	6.92	0.068 0	0.70	0.004 7	162.0	11.0
27.80	233.00	1.96	1.09	4.68	14.20	0.111 0	0.56	0.003 5	161.9	4.3
10.10	54.50	1.20	0.82	2.48	8.35	0.067 2	0.68	0.005 1	155.3	9.1

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表 2 铜山岭层状矽卡岩中石榴石电子探针(EPMA)分析结果及其计算结果

Table 2. Results of EPMA analysis and calculation results for garnet in Tongshanling stratiform skarn w_B/%

	点号	SiO₂	TiO₂	Al₂O₃	TFeO	MnO	MgO	CaO	And	Pyr	Spe	Gro
核部	1	38.6	0.29	14.6	9.39	0.60	0.05	35.5	30.5	0.2	1.31	68
	2	39.1	0.15	14.5	9.12	0.47	0.03	35.7	29.6	0.13	1.02	69.3
	3	38.6	0.14	13.3	10.80	0.67	0.03	35.1	35.3	0.11	1.47	63.1
	4	38.8	0.20	15.1	8.49	0.54	0.06	35.2	27.8	0.23	1.19	70.8
	5	35.0	0.14	12.0	9.02	0.55	0.15	32.4	32.0	0.61	1.32	66.1
	6	38.8	0.19	14.2	9.75	0.47	0.02	35.3	32.0	0.09	1.03	66.9
	7	38.7	0.18	14.0	9.74	0.51	0.06	35.5	31.7	0.24	1.12	66.9
	8	39.1	0.23	14.5	9.68	0.50	0.01	35.3	31.7	0.04	1.11	67.1
	9	38.9	0.22	15.4	8.83	0.42	0.02	35.5	28.9	0.07	0.92	70.2
	10	39.1	0.61	14.2	9.45	0.05	0.22	35.9	30.5	0.86	0.10	68.5
边部	11	39.5	0.08	16.0	7.79	0.02	0.15	36.2	25.1	0.57	0.03	74.3
	12	39.4	0.17	15.6	8.13	0.02	0.17	35.9	26.3	0.67	0.05	73.0
	13	39.7	0.28	15.5	8.20	0.05	0.17	36.1	26.4	0.64	0.10	72.8
	14	39.6	0.29	15.6	8.22	0.03	0.20	35.6	26.8	0.79	0.06	72.3
	15	39.6	0.60	15.9	7.16	0.03	0.25	35.9	23.1	0.94	0.07	75.9
	16	39.4	0.59	15.7	7.86	0.09	0.13	36.2	25.2	0.50	0.19	74.1
	17	40.1	0.40	14.9	8.55	0.08	0.17	36.0	27.6	0.66	0.17	71.6
	18	39.1	0.42	16.5	6.65	0.21	0.14	35.9	21.5	0.55	0.46	77.5
	19	38.6	0.28	16.0	8.43	0.03	0.08	35.4	26.3	0.31	0.06	72.5
	20	38.9	0.32	15.6	7.91	0.29	0.04	35.7	25.7	0.16	0.63	73.5
	21	36.7	2.54	15.2	3.78	0.11	1.50	35.7	11.7	5.51	0.23	82.6
	22	38.9	0.41	15.9	7.82	0.63	0.04	35.3	25.5	0.14	1.38	73
注：And.钙铁榴石; Pyr.镁铝榴石; Spe.锰铝榴石; Gro.钙铝榴石

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表 3 铜山岭层状矽卡岩中石榴石的LA-ICP-MS分析结果

Table 3. Results of LA-ICP-MS analysis of garnet in the Tongshanling stratiform skarn w_B/10^-6

元素	Sc	V	Cr	Co	Ni	Zn	Ga	Rb	Sr	Y	Zr	Nb	Cd	Cs	Ba	La	Ce	Pr
ZK1301-1	15.2	107	154	0.62	1.91	6.35	27.0	0.03	0.38	21.3	43.3	9.56	5.06	0.01	0.02	0.01	0.03	0.01
ZK1301-2	5.93	91.5	159	1.28	3.65	10.6	21.0	0.06	1.28	19.77	160	4.2	3.84	0.02	0.05	0.08	0.75	0.22
ZK1301-3	5.81	86.0	25.1	0.51	2.81	4.4	30.6	0.04	0.25	17.63	31.4	9.24	5.17	0.01	0.04	0.01	0.03	0.02
ZK1301-4	3.49	59.1	16.0	2.7	9.19	9.96	21.3	0.04	1.17	15.0	170.0	10.9	4.46	0.01	0.03	0.63	5.69	1.44
ZK1301-5	1.62	21.7	9.42	6.05	14.3	19.98	17.9	0.08	2.06	10.7	66.9	9.61	1.41	0.03	0.07	2.04	15.5	2.87
ZK1301-6	1.00	22.3	3.8	6.12	17.8	21.7	19.5	0.1	2.32	10.6	73.1	11.6	1.22	0.03	0.06	2.43	17.2	3.33
ZK1301-7	1.15	21.1	9.04	3.12	10.2	19.9	18.8	0.05	3.20	13.0	78.7	13.0	0.66	0.02	0.03	3.01	19.0	3.28
ZK1301-8	1.81	29.8	12.4	1.39	2.8	19.4	18.6	0.04	2.85	13.9	39.9	7.50	0.93	0.02	0.04	4.22	15.2	1.88
ZK1301-9	14.8	265	1419	1.13	3.64	9.54	24.6	0.06	0.81	20.7	77.0	8.73	6.66	0.02	0.06	0.01	0.08	0.03
ZK1301-10	16.0	112	65.5	0.69	3.31	12.9	21.9	0.05	16.61	19.1	69.2	5.62	5.3	0.02	0.11	2.85	5.79	0.79

元素	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Hf	Ta	W	Pb	Th	U
ZK1301-1	0.15	0.23	0.07	1.03	0.29	2.72	0.73	2.76	0.44	3.57	0.51	2.90	0.76	0.20	0.88	—	0.01
ZK1301-2	2.13	1.87	0.28	3.17	0.55	3.79	0.75	2.23	0.31	2.07	0.29	4.43	0.55	0.39	1.07	0.05	0.07
ZK1301-3	0.17	0.28	0.16	1.12	0.3	2.48	0.61	1.97	0.30	2.25	0.35	2.40	0.75	0.25	1.12	—	0.01
ZK1301-4	8.31	2.09	0.35	2.23	0.37	2.51	0.53	1.76	0.22	1.78	0.29	5.11	0.75	0.48	0.88	0.75	0.28
ZK1301-5	12.6	2.70	0.49	2.17	0.31	1.98	0.34	1.13	0.16	1.18	0.18	1.80	0.47	1.95	1.91	2.35	1.22
ZK1301-6	14.9	3.12	0.55	2.66	0.35	2.08	0.38	1.13	0.17	1.07	0.17	1.47	0.51	2.39	2.28	3.16	1.34
ZK1301-7	15.4	3.19	0.57	2.73	0.39	2.39	0.47	1.42	0.2	1.44	0.22	1.87	0.73	4.77	1.27	3.03	1.54
ZK1301-8	8.14	2.00	0.53	2.00	0.34	2.32	0.49	1.5	0.21	1.67	0.25	1.07	0.58	11.30	1.30	1.96	1.19
ZK1301-9	0.40	0.51	0.11	1.45	0.38	3.08	0.77	2.65	0.41	2.99	0.43	3.71	0.73	0.85	1.75	0.01	0.01
ZK1301-10	3.85	1.18	0.21	1.46	0.32	2.60	0.65	2.49	0.42	3.24	0.54	3.17	0.78	0.20	3.77	5.02	0.21
注：—代表未检测到；0.01代表低于检测线

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表 4 铜山岭层状矽卡岩中白钨矿的原位LA-ICP-MS分析结果

Table 4. Results of in situ LA-ICP-MS analysis of scheelite in the Tongshanling stratiform skarn w_B/10^-6

元素	Ti	Fe	Cu	Zn	As	Rb	Sr	Y	Zr	Nb	Mo	Sn	Ba	La	Ce
Sch1-a	0.97	28.7	0.75	1.00	1.7	0.12	655	19.45	2.17	1.13	0.39	0.29	0.06	8.85	77.5
Sch1-a	1.27	29.3	0.76	1.33	1.68	0.13	592	19.63	2.17	0.28	0.30	0.29	0.06	7.86	74.1
Sch1-a	1.28	46.5	0.8	0.93	1.69	0.12	702	17.41	—	0.86	0.21	0.3	0.05	9.37	80.5
Sch1-a	1.24	30.6	0.82	1.09	1.77	0.13	710	19.14	4.49	0.58	0.22	0.31	0.07	9.17	83.5
Sch1-a	1.43	37.6	0.94	1.35	2.15	0.16	674	28.30	8.53	1.1	0.12	0.37	0.06	13.6	119
Sch1-a	1.68	38.8	1.2	1.29	2.20	0.16	633	27.17	2.83	—	0.2	0.39	0.09	14.2	128
Sch1-b	1.21	28.7	0.74	0.94	2.76	0.12	432	0.56	5.03	16.62	3 212	0.28	0.08	28	114.6
Sch1-b	1.62	29.9	0.78	1.67	12.04	0.13	501	4.79	2.24	84.17	3 184	0.31	0.13	23.7	90.1
Sch1-b	1.47	31.1	0.83	1.03	7.89	0.13	508	0.98	4.35	74.97	2 983	0.3	0.06	21.2	82.5
Sch1-b	1.22	31.7	0.78	1.06	11.55	0.12	461	0.81	2.27	70.46	3 081	0.47	0.13	19.7	78.2
Sch1-b	1.27	30.3	0.83	1.06	2.67	0.13	380	6.28	11.46	0.29	21	0.30	0.04	7.02	39.1
Sch1-b	1.22	30.3	0.81	1.13	12.02	0.13	391	0.80	—	83.17	2 726	0.30	0.06	21.7	80.4
Sch1-b	1.36	30.4	0.83	1.05	7.19	0.13	433	1.21	6.48	95.22	2 584	0.29	0.08	23	84.6
Sch1-b	1.27	31.2	0.81	1.12	9.21	0.13	465	0.78	—	90.63	2 822	0.29	0.07	26.4	94.8
Sch1-b	1.46	34.3	0.86	1.23	3.46	0.15	367	1.11	—	18.98	2 984	0.33	0.08	20.3	78.8
Sch1-b	1.33	37.1	0.98	1.28	4.27	0.16	377	0.23	2.77	19.39	3 309	0.59	0.08	20	75.2
Sch1-b	1.73	37.8	0.99	1.43	5.56	0.19	360	0.58	5.45	15.94	3 161	0.51	0.07	14.5	58.8
Sch1-b	1.48	36.4	0.96	1.15	3.74	0.15	401	0.69	5.39	18.16	2 977	0.34	0.09	28.6	107
Sch1-b	1.93	37.1	0.98	1.21	2.05	0.16	374	0.92	—	24.26	2 774	0.36	0.09	28.9	110
Sch1-c	1.53	36.7	0.95	1.17	2.04	0.16	99.5	1.78	—	1.42	102	0.36	0.05	0.19	1.9
Sch1-c	1.67	35.9	0.93	1.21	2.05	0.15	117	1.90	5.51	0.99	104	0.37	0.1	0.31	3.44
Sch1-c	1.66	35.8	0.97	1.25	3.13	0.15	83.5	0.79	5.27	2.04	110	0.36	0.08	0.06	0.42
Sch1-c	1.51	36.7	0.95	1.3	6.98	0.15	88.8	0.50	10.41	4.70	92.8	0.35	0.04	0.02	0.36
Sch1-c	1.25	31.3	0.85	1.06	2.11	0.13	75	0.85	—	4.13	94.5	0.30	0.07	0.05	0.61
Sch1-c	1.18	31.8	0.87	1.00	1.75	0.13	117	2.00	—	0.29	91.6	0.31	0.07	0.33	2.87
Sch1-c	1.22	31.0	0.82	1.02	1.76	0.13	93.4	1.78	4.47	0.29	102	0.30	0.05	0.14	1.47
Sch1-c	1.41	31.5	0.74	1.07	3.97	0.13	94.6	0.73	4.54	5.25	112	0.31	0.06	0.06	0.67
Sch1-c	1.76	37.3	0.95	1.18	2.11	0.16	111	3.88	6.39	1.75	113	0.36	0.05	0.38	3.98
Sch1-c	1.67	35.1	1.1	1.57	4.77	0.15	106	4.03	—	0.33	115	0.34	0.06	0.38	4.08
Sch1-c	1.64	36.0	0.91	1.21	15.87	0.15	114	1.64	8.04	5.13	108	0.49	0.09	0.16	1.71
Sch1-c	1.16	35.5	0.98	1.29	1.86	0.15	93.7	2.00	5.42	0.35	107	0.34	0.09	0.36	3.73
Sch2	2.79	45.6	0.88	0.89	3.13	0.11	223	1.83	3.16	5.42	2 243	0.28	0.15	8.21	39.3
Sch2	2.75	45.8	0.92	0.77	3.12	0.11	227	0.82	4.75	4.42	2 248	0.27	0.17	9.32	43
Sch2	2.72	46.1	0.87	0.77	3.23	0.10	220	4.72	3.17	3.79	2 246	0.28	0.41	11.2	52
Sch2	2.93	49.8	1.00	0.82	3.50	0.11	226	5.71	3.91	4.52	2 558	0.36	0.24	12.2	49.3
Sch2	2.76	48.2	0.93	0.86	3.31	0.12	233	2.77	3.29	4.61	2 018	0.29	0.16	6.51	29.3
Sch2	2.67	47.5	0.87	0.82	3.23	0.11	270	1.50	4.92	3.06	3 028	0.28	0.21	11.2	35.4
Sch2	2.81	49.7	1.56	0.95	3.24	0.18	243	3.34	8.41	3.82	2 076	0.29	0.17	11.1	45.5
Sch2	2.95	51.6	1.03	0.93	3.86	0.12	235	1.10	3.42	2.06	2 169	0.29	0.28	9.03	41
Sch2	2.57	46.1	0.91	0.87	3.07	0.11	219	1.59	6.13	17.45	2 434	0.26	0.13	11.8	41.7
Sch2	2.90	46.8	0.87	0.87	3.02	0.1	225	0.47	7.76	18.1	2 301	0.26	0.15	12.7	45.8
Sch2	2.50	46.9	0.87	0.89	3.15	0.1	220	0.67	4.61	18.9	2 266	0.26	0.13	13.6	47.8
Sch2	2.55	46.1	0.88	0.87	3.10	0.11	203	0.58	—	6.51	2 085	0.26	0.3	11.3	43.7
Sch2	2.50	47.0	0.84	0.84	5.93	0.11	227	0.86	4.63	6.01	2 166	0.26	0.15	13.3	51.3
Sch2	4.14	4189	0.98	10.34	3.55	0.12	193	7.38	1.81	0.98	1 712	2.1	0.65	5.22	18
Sch2	3.22	59.3	1.07	1.08	4.82	0.13	194	4.82	1.91	2.34	1 951	0.31	0.37	5.2	19.3
Sch2	3.11	56.4	1.00	1.00	5.14	0.12	193	1.58	—	5.06	1 836	0.3	0.2	6.5	23.5
Sch2	3.02	56.3	0.97	1.02	3.48	0.13	206	3.20	1.78	3.13	1 882	0.3	0.34	6.19	23.3
Sch1-a	22.6	159	28.3	4.43	15.91	1.85	9.23	1.37	2.84	0.19	0.75	0.04	0.01	—	24.6
Sch1-a	22.8	172	34.6	4.53	22.19	2.46	11.80	1.76	3.11	0.22	0.71	0.05	0.01	—	12.1
Sch1-a	23.4	160	28.7	4.38	15.48	1.77	8.56	1.33	2.53	0.2	0.62	0.05	0.01	—	12.9
Sch1-a	24.7	176	33.8	3.47	18.69	2.28	11.20	1.57	2.80	0.18	0.78	0.06	0.01	—	12.6
Sch1-a	32.7	217	37.0	3.78	21.93	2.47	13.40	2.16	4.35	0.38	1.40	0.10	—	—	8.21
Sch1-a	36.0	251	45.8	5.30	27.99	3.22	16.20	2.34	4.79	0.35	1.04	0.12	—	—	6.54
Sch1-b	22.3	120	12.1	1.49	2.5	0.12	0.25	0.03	0.04	—	0.01	0	0.01	—	7.66
Sch1-b	17.2	89.3	9.99	1.41	3.27	0.32	1.68	0.27	0.63	0.08	0.32	0.04	0.01	0.33	10.1
Sch1-b	15.9	86.0	9.06	1.17	2.42	0.15	0.59	0.06	0.12	0.01	0.03	—	0.01	0.48	13.0
Sch1-b	14.7	75.9	8.28	0.91	2.17	0.13	0.47	0.06	0.12	0.01	0.02	—	0.01	0.25	10.5
Sch1-b	8.90	56.4	11.2	2.07	7.16	0.7.0	3.04	0.39	0.70	0.05	0.15	0.01	0.01	—	5.69
Sch1-b	14.4	72.8	6.78	0.8	2.11	0.18	0.55	0.07	0.14	—	0.02	—	0.01	0.24	15.1
Sch1-b	14.8	75.2	6.48	0.78	1.8	0.12	0.47	0.07	0.22	0.01	0.06	—	0.01	0.24	11.3
Sch1-b	16.9	81.8	7.42	1.12	1.95	0.13	0.41	0.04	0.08	—	0.02	—	—	0.34	9.38
Sch1-b	14.1	70.1	6.75	0.94	1.72	0.14	0.72	0.08	0.19	0.02	0.06	—	—	0	11.4
Sch1-b	12.5	60.1	5.23	0.68	1.16	0.06	0.10	0.01	0.01	—	0.01	—	0.01	0	11.5
Sch1-b	10.9	53.2	4.76	0.67	1.18	0.07	0.27	0.04	0.05	—	0.04	—	0.01	0	11.1
Sch1-b	19.2	94.7	8.64	0.92	2.01	0.11	0.44	0.07	0.09	0.01	0.03	—	0	0.30	10.3
Sch1-b	20.4	100	9.19	1.03	2.32	0.14	0.55	0.07	0.10	0.01	0.03	—	0.01	0.20	10.8
Sch1-c	0.74	6.30	1.52	0.16	1.06	0.15	1.03	0.15	0.35	0.02	0.16	0.01	—	—	3.68
Sch1-c	1.29	10.7	2.53	0.13	1.51	0.18	0.99	0.18	0.39	0.03	0.11	0.01	0.01	—	3.09
Sch1-c	0.16	1.78	0.43	0.05	0.42	0.06	0.34	0.05	0.22	0.01	0.04	0.01	0.01	—	0.84
Sch1-c	0.20	1.97	0.61	0.05	0.43	0.06	0.34	0.07	0.10	0.01	0.05	—	0.01	—	3.44
Sch1-c	0.27	2.64	0.84	0.07	0.65	0.07	0.38	0.08	0.22	0.02	0.05	0.01	0.01	—	0.88
Sch1-c	1.01	8.68	2.14	0.19	1.10	0.18	0.97	0.17	0.36	0.03	0.08	0.01	—	—	3.54
Sch1-c	0.63	6.18	1.61	0.11	1.24	0.16	0.99	0.18	0.35	0.03	0.10	0.01	0.01	—	0.94
Sch1-c	0.27	3.36	0.97	0.09	0.69	0.08	0.48	0.09	0.17	0.01	0.06	—	—	—	1.25
Sch1-c	1.50	15.1	3.50	0.10	2.52	0.37	1.93	0.33	0.70	0.07	0.24	0.02	0.01	—	1.60
Sch1-c	1.56	14.8	3.97	0.11	2.85	0.41	2.16	0.35	0.74	0.07	0.27	0.03	0.01	—	1.34
Sch1-c	0.77	7.8	2.12	0.12	1.5	0.21	0.96	0.19	0.36	0.02	0.09	0.02	0.01	—	4.46
Sch1-c	1.31	13.2	2.8	0.14	1.81	0.21	1.25	0.23	0.34	0.03	0.09	0.01	—	—	1.30
Sch2	8.03	41	4.99	1.26	2.42	0.19	0.73	0.10	0.17	0.01	0.09	0.01	—	—	7.68
Sch2	8.97	43.9	4.30	0.63	1.53	0.10	0.31	0.04	0.07	0.01	0.02	—	—	—	7.36
Sch2	10.5	50.1	6.31	1.95	3.37	0.28	1.33	0.21	0.35	0.05	0.23	0.03	—	0.13	8.71
Sch2	9.80	48.9	7.59	2.92	4.68	0.53	2.18	0.33	0.43	0.06	0.25	0.02	0.01	—	8.64
Sch2	6.29	34.8	4.53	1.96	2.74	0.30	1.37	0.19	0.29	0.04	0.14	0.01	—	—	5.41
Sch2	5.96	25.6	2.74	0.85	1.11	0.12	0.52	0.10	0.15	0.02	0.08	—	—	—	9.10
Sch2	8.79	42.5	4.86	1.69	1.99	0.18	1.00	0.15	0.21	0.03	0.15	0.01	—	—	8.80
Sch2	8.54	42.2	4.14	1.08	1.19	0.10	0.32	0.05	0.12	0.02	0.05	—	0.01	—	12.1
Sch2	7.12	30.4	3.15	0.68	1.71	0.16	0.74	0.10	0.15	0.02	0.12	—	0	—	9.93
Sch2	7.93	32.1	3.04	0.37	1.08	0.05	0.19	0.01	0.01	—	0.01	—	0.01	0.06	10.5
Sch2	8.31	34.7	3.44	0.52	1.32	0.08	0.27	0.03	0.05	0.01	0.02	—	—	0.11	8.15
Sch2	8.28	35.9	3.45	0.68	1.30	0.07	0.20	0.02	0.03	—	0.01	—	0.01	—	7.04
Sch2	9.64	42.7	4.08	0.84	1.50	0.10	0.33	0.05	0.06	0.01	0.03	—	0.01	—	10.3
Sch2	3.44	17.2	3.39	2.04	2.80	0.34	1.83	0.3	0.52	0.07	0.46	0.05	0.01	—	9.42
Sch2	3.54	16.0	2.29	1.25	1.64	0.18	0.99	0.16	0.37	0.06	0.27	0.02	—	—	11.2
Sch2	4.20	19.0	1.95	0.71	0.85	0.13	0.63	0.12	0.18	0.02	0.07	0.01	0.01	—	11.5
Sch2	4.27	19.5	2.44	1.09	1.33	0.16	0.73	0.14	0.24	0.03	0.17	0.02	—	—	6.69
注：—代表未检测到；0.01代表低于检测线

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