大兴安岭南段北大山含锡石与不含锡石花岗岩特征对比

丁磊磊; 毛启贵; 王玉往; 管育春; 李婷婷

doi:10.3799/dqkx.2021.235

大兴安岭南段北大山含锡石与不含锡石花岗岩特征对比

doi: 10.3799/dqkx.2021.235

1.
北京矿产地质研究院有限责任公司, 北京 100012
2.
中国科学院新疆生态与地理研究所, 新疆乌鲁木齐 830011
3.
山东省第三地质矿产勘查院, 山东烟台 264000

基金项目:

中国地质调查局国家二级项目 DD20190815

详细信息

作者简介:
丁磊磊（1988-），女，博士后，主要从事火山岩成因机制及矿床研究. ORCID：0000-0002-4686-8898. E-mail：leilei928@126.com

通讯作者:
王玉往，E-mail: wyw@cnncm.com

中图分类号: P581
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出版历程
- 收稿日期: 2021-11-29
- 刊出日期: 2022-09-25

Comparison on the Characteristics of Cassiterite-Bearing and Barren Granites in the Beidashan Region, Southern Great Xing'an Range

1.
Beijing Institute of Geology for Mineral Resources Co., Ltd., Beijing 100012, China
2.
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
3.
The Third Institute of Geology and Mineral Exploration of Shandong Province, Yantai 264000, China

摘要

摘要: 近年来，人们在大兴安岭南部发现了多处与白垩纪花岗岩相关的锡多金属矿床，但并非所有该时期的花岗岩都与锡矿伴生.为了解花岗岩伴生锡矿的形成条件，本文对内蒙古北大山岩体中的含锡石（磨盘山）与不含锡石（窟窿山）花岗岩开展了锡石U-Pb年龄、锆石U-Pb年龄、全岩地球化学及矿物地球化学分析测试，并进行岩石学、年代学和岩浆演化物理化学条件的对比.结果表明，窟窿山石英正长斑岩和磨盘山黑云母花岗岩的锆石U-Pb加权平均年龄分别为140.2±0.7 Ma和139.9±0.7 Ma，磨盘山黑云母花岗岩锡石U-Pb加权平均年龄为134.9±1.4 Ma，时代均属于早白垩世.全岩地球化学分析结果表明，这些岩石具有高硅（SiO₂=64.96%~76.71%），富碱（Na₂O+K₂O=8.28%~9.03%），过铝质（Al₂O₃=12.42%~15.88%）的特点.相对富集Th、Pb、Hf等元素，亏损Nb、Ta、Ti、Sr、P等元素.轻稀土相对重稀土明显富集，Eu异常明显.窟窿山石英正长斑岩与磨盘山黑云母花岗岩在哈克图解上，随着SiO₂含量增加，TiO₂、FeO^T、Al₂O₃、CaO、Na₂O、P₂O₅含量逐渐降低，呈现较好的负相关关系，暗示二者具有同源性.但窟窿山样品的DI值为89，Sn含量为2×10^‒6；磨盘山样品具有较高的DI值（96~98），Sn含量高（15×10^‒6~36×10^‒6）.从矿物学特征反演的物理化学条件推测，窟窿山岩体经历了温度降低、氧逸度升高的过程，而磨盘山岩体在降温过程中氧逸度进一步降低.另外，在流体卤素含量上，黑云母的Ⅳ（F）、Ⅳ（Cl）指示磨盘山花岗岩（Ⅳ（F）=0.95~1.15，Ⅳ（Cl）=-3.66~-3.54）相较于窟窿山石英正长斑岩（Ⅳ（F）=1.24~1.28，Ⅳ（Cl）=-2.96~-2.52）具有更高富集程度的Cl和F含量.综上，低氧逸度、高演化程度和高的F、Cl丰度是影响北大山地区花岗岩是否含锡的重要原因.
- 大兴安岭 /
- 白垩纪 /
- 花岗岩 /
- 锡 /
- 锆石 /
- 矿物地球化学 /
- 物理化学条件 /
- 岩石学
Abstract: Recently, many tin polymetallic deposits related to Cretaceous granite have been discovered in the southern part of the Great Xing'an Range. However, not all granites of this period are associated with tin deposits. To obtain a better understanding of the formation conditions of granite associated tin deposits, (Method) in this paper, the cassiterite U-Pb age, zircon U-Pb age, whole rock geochemistry and mineral chemistry analysis of the cassiterite-bearing granites (the Mopanshan area) and barren granites (the Kulongshan area) in the Beidashan pluton were carried out. The geochronology, geochemistry and physical-chemical conditions of magma evolution were compared. The U-Pb weighted average zircon ages of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite are 140.2±0.7 Ma and 139.9±0.7 Ma, respectively, and the cassiterite U-Pb weighted average age of the Mopanshan area is 134.9±1.4 Ma. All of them are Early Cretaceous in age. The whole rock geochemical analysis results show that these rocks are rich in silicon (SiO₂=64.96%-76.71%), alkali (Na₂O+ K₂O=8.28%-9.03%), and aluminum (Al₂O₃=12.42%-15.88%). For trace elements, they are relatively enriched in elements such as Th, Pb, and Hf, and deficient in elements such as Nb, Ta, Ti, Sr, and P. For rare earth elements, they show significant enriched HREEs than LREEs, and Eu negative anomaly is unusually obvious. As the content of SiO₂ increases, the content of TiO₂, FeO^T, Al₂O₃, CaO, Na₂O, and P₂O₅ gradually decreases, showing a good negative correlation, suggesting a homogeneous magmatic source. However, the DI value of the Kulongshan sample is 89 and the Sn content is 2×10^-6; the Mopanshan samples have a higher DI value (96-98) and higher Sn content (15×10^-6~36×10^-6). Based on the physical- chemical conditions inverted from mineralogy, the Kulongshan granite has experienced a process of oxygen fugacity increase during cooling, while the oxygen fugacity of the Mopanshan granite has further decreased during the cooling process. In addition, in terms of fluid halogen content, the Ⅳ (F) and Ⅳ (Cl) of biotite indicate the Mopanshan granite (Ⅳ(F)=0.95-1.15; Ⅳ(Cl)=-3.66--3.54) compared to the Kulongshan porphyritic quartz syenite (Ⅳ(F)=1.24-1.28; Ⅳ(Cl)=-2.96--2.52) has a higher concentration of Cl and F. In summary, low oxygen fugacity, high degree of evolution, and high F and Cl abundance, are the main factors affecting enrichment of cassiterite in granite in the Beidashan area.
- Great Xing'an Range /
- Cretaceous /
- granite /
- tin deposits /
- zircon /
- mineral chemistry /
- physical-chemical condition /
- petrology

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图 1 中国东北及邻区构造分区简图(a)和大兴安岭南段锡多金属矿床分布图(b) (改自Yang et al., 2019)

Fig. 1. Sketch geotectonic unit map of Northeast China and it's neighboring areas (a) and locations of Sn-polymetallic deposits in the southern Great Xing'an Range (b) (modified after Yang et al., 2019)

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图 2 大兴安岭南段北大山岩体和锡矿分布图(改自管育春等, 2017)

Fig. 2. Distribution map of Beidashan and Sn-polymetallic deposits in the southern Great Xing'an Range (modified after Guan et al., 2017)

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图 3 窟窿山(a~c)和磨盘山(d~f)野外照片

a. 窟窿山岩体野外露头；b. 石英正长斑岩手标本；c.石英脉中的萤石；d. 磨盘山岩体野外露头；e. 黑云母花岗岩手标本；f. 伟晶岩脉中的电气石

Fig. 3. Field photos of the Kulongshan (a‒c) and Mopanshan area (d‒f)

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图 4 窟窿山石英正长斑岩(a，b)和磨盘山黑云母花岗岩(c，d)镜下照片

a，c.为单偏光照片；c，d.为正交偏光照片；Q.石英；Kf.钾长石；Pl.斜长石；Bt.黑云母

Fig. 4. Photomicrographs from the Kulongshan porphyritic quartz syenite (a, b) and the Mopanshan biotite granite (c, d)

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图 5 窟窿山石英正长斑岩和磨盘山黑云母花岗岩锆石阴极发光图像及定年结果

Fig. 5. CL images and dating results of the zircons of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 6 窟窿山石英正长斑岩和磨盘山黑云母花岗岩锆石U-Pb同位素年龄谐和图

Fig. 6. Zircon U-Pb concordia diagram of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 7 磨盘山黑云母花岗岩锡石透射光(a)、反射光(b)和CL图像(c); U-Pb年龄谐和图(d); U-Pb年龄加权平均值直方图(e)

Fig. 7. Transmitted (a), reflected (b), CL images (c), U-Pb concordia diagram (d) and age histogram (e) of cassiterites from the Mopanshan biotite granite

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图 8 窟窿山石英正长斑岩和磨盘山花岗岩A/CNK-A/NK(a)、K₂O-SiO₂图解(b)

图a底图据Maniar and Piccoli（1989）；图b底图据Rickwood（1989）

Fig. 8. A/CNK-A/NK diagram (a)、K₂O-SiO₂ (b) of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 9 窟窿山石英正长斑岩和磨盘山黑云母花岗岩微量元素蛛网图(a)和稀土元素配分图(b)

标准化数据来自Sun and McDonough（1989）

Fig. 9. Primitive mantle-normalized trace element and chondrite-normalize REE diagramsof the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 10 窟窿山石英正长斑岩和磨盘山黑云母花岗岩锆石稀土元素配分模式

据Sun and McDonough（1989）

Fig. 10. Chondrite-normalized REE diagrams for zircons of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 11 窟窿山石英正长斑岩和磨盘山黑云母花岗岩10TiO₂-FeO^T-MgO分类图解(a)和Fe²⁺+Mn-Mg-Al^Ⅵ+Fe³⁺+Ti分类图解(b)

图a底图据Nachit et al.（2005）；图b底图据Foster（1960）

Fig. 11. 10TiO₂-FeO^T-MgO (a) and Fe²⁺+Mn-Mg-Al^Ⅵ+Fe³⁺+Ti (b) classifications of biotite compositions of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 12 窟窿山石英正长斑岩和磨盘山黑云母花岗岩哈克图解

Fig. 12. Harker diagram of the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

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图 13 锆石和黑云母的温度‒氧逸度数据

Fig. 13. Temperature-oxygen fugacity plot of zircons and biotite

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图 14 窟窿山样品、磨盘山样品和Sn-W-Be矿床的Ⅳ(F)和Ⅳ(Cl)对比

Sn-W-Be数据来自Munoz（1984）

Fig. 14. Comparisons of Ⅳ(F) and Ⅳ(Cl) among samples from the Kulongshan area, the Mopanshan area and Sn-W-Be deposit

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表 1 窟窿山石英正长斑岩和磨盘山黑云母花岗岩锆石LA⁃ICP⁃MS U⁃Pb定年结果

Table 1. LA-ICP-MS U-Pb dating results of zircon from the Kulongshan porphyritic quartz syenite and Mopanshan biotite granite

测点号	U	Th	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	年龄（Ma)				谐和度(%)
测点号	(10^‒6）		Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	谐和度(%)
20BDS02-3-1	166	86.9	0.52	0.048 3	0.003 5	0.146 0	0.010 0	0.021 9	0.000 5	137.7	9.1	139.8	3.2	102
20BDS02-3-2	156	67.7	0.43	0.051 6	0.004 2	0.152 0	0.012 0	0.021 6	0.000 7	143.0	10.0	138.0	4.4	97
20BDS02-3-3	173	134	0.77	0.049 9	0.004 1	0.148 0	0.012 0	0.021 7	0.000 6	139.0	10.0	138.3	3.8	99
20BDS02-3-4	322	298	0.93	0.048 2	0.003 2	0.139 2	0.008 8	0.021 0	0.000 4	131.9	7.9	133.9	2.7	102
20BDS02-3-5	373	140	0.38	0.050 6	0.003 8	0.152 0	0.012 0	0.021 9	0.000 6	144.0	10.0	139.4	4.0	97
20BDS02-3-6	141	77.5	0.55	0.049 7	0.003 7	0.151 0	0.011 0	0.022 0	0.000 6	143.0	11.0	140.0	3.5	98
20BDS02-3-7	109	41.7	0.38	0.050 1	0.004 6	0.156 0	0.013 0	0.022 9	0.000 6	146.0	12.0	145.6	3.6	100
20BDS02-3-8	204	101	0.49	0.052 0	0.003 4	0.158 0	0.011 0	0.022 1	0.000 5	148.2	9.2	140.7	3.3	95
20BDS02-3-9	262	128	0.49	0.047 0	0.002 9	0.145 8	0.009 5	0.022 4	0.000 4	137.7	8.4	143.0	2.8	104
20BDS02-3-10	162	118	0.73	0.050 7	0.004 0	0.152 0	0.011 0	0.021 9	0.000 5	143.0	10.0	139.8	3.3	98
20BDS02-3-11	98.7	62.7	0.64	0.055 6	0.006 5	0.163 0	0.018 0	0.022 0	0.000 9	151.0	16.0	140.0	5.4	93
20BDS02-3-12	154	76.1	0.49	0.050 5	0.004 7	0.161 0	0.015 0	0.023 0	0.000 6	151.0	13.0	146.5	3.8	97
20BDS02-3-13	132	65.3	0.49	0.051 6	0.004 6	0.154 0	0.013 0	0.021 8	0.000 7	144.0	12.0	139.2	4.3	97
20BDS02-3-14	114	49.2	0.43	0.051 2	0.005 5	0.153 0	0.015 0	0.022 1	0.000 7	145.0	14.0	140.8	4.6	97
20BDS02-3-15	110	42.2	0.38	0.048 4	0.005 5	0.148 0	0.015 0	0.021 8	0.000 9	139.0	14.0	139.1	5.8	100
20BDS02-3-16	192	112	0.58	0.049 9	0.004 6	0.148 0	0.012 0	0.021 8	0.000 7	140.0	11.0	138.8	4.6	99
20BDS02-3-17	182	84.4	0.46	0.052 4	0.004 5	0.155 0	0.013 0	0.021 7	0.000 7	146.0	11.0	138.1	4.1	95
20BDS02-3-18	121	57.4	0.47	0.045 2	0.004 9	0.145 0	0.016 0	0.023 4	0.000 8	136.0	14.0	149.1	4.7	110
20BDS02-3-19	100	41.2	0.41	0.050 5	0.006 9	0.145 0	0.018 0	0.022 0	0.000 8	139.0	17.0	140.3	5.1	101
20BDS02-3-20	80.1	33.6	0.42	0.048 7	0.005 8	0.152 0	0.017 0	0.022 9	0.000 8	142.0	15.0	146.1	5.2	103
20BDS02-3-21	46.2	17.6	0.38	0.048 1	0.006 5	0.148 0	0.019 0	0.023 1	0.000 9	138.0	17.0	146.9	5.8	106
20BDS02-3-22	228	118	0.52	0.050 9	0.003 4	0.152 0	0.010 0	0.021 9	0.000 5	143.1	9.0	139.6	3.4	98
20BDS02-3-23	145	100	0.69	0.052 5	0.004 7	0.154 0	0.012 0	0.022 1	0.000 6	145.0	10.0	140.9	4.0	97
20BDS02-3-24	196	136	0.69	0.047 7	0.002 7	0.143 9	0.008 2	0.021 7	0.000 5	136.1	7.3	138.1	3.3	101
20BDS05-4-1	193	71.3	0.37	0.053 1	0.004 2	0.171 0	0.013 0	0.023 7	0.000 8	159.0	11.0	150.9	5.0	95
20BDS05-4-2	513	211	0.41	0.049 7	0.002 3	0.150 0	0.007 9	0.021 7	0.000 6	141.5	6.9	138.5	3.5	98
20BDS05-4-3	741	261	0.35	0.049 5	0.002 6	0.151 1	0.008 3	0.022 0	0.000 6	142.6	7.3	140.0	3.9	98
20BDS05-4-4	302	130	0.43	0.045 5	0.002 9	0.145 2	0.009 4	0.022 9	0.000 5	137.1	8.3	145.8	3.0	106
20BDS05-4-5	408	183	0.45	0.051 2	0.002 5	0.151 2	0.007 2	0.021 7	0.000 5	142.6	6.3	138.4	3.3	97
20BDS05-4-6	168	63.8	0.38	0.051 2	0.004 6	0.152 0	0.013 0	0.021 7	0.000 7	143.0	11.0	138.5	4.4	97
20BDS05-4-7	143	51.7	0.36	0.054 5	0.005 4	0.161 0	0.014 0	0.021 8	0.000 7	151.0	13.0	138.9	4.4	92
20BDS05-4-8	242	100	0.41	0.050 1	0.002 7	0.155 2	0.008 0	0.022 6	0.000 6	146.0	7.0	144.0	3.6	99
20BDS05-4-9	637	214	0.34	0.049 5	0.002 4	0.157 3	0.008 0	0.023 0	0.000 6	148.0	7.0	146.8	4.0	99
20BDS05-4-10	182	65.3	0.36	0.049 4	0.004 0	0.147 0	0.011 0	0.022 0	0.000 8	140.0	10.0	140.0	4.9	100
20BDS05-4-11	252	90.8	0.36	0.046 1	0.003 0	0.136 4	0.008 8	0.021 5	0.000 7	129.4	7.9	137.1	4.6	106
20BDS05-4-12	466	164	0.35	0.048 7	0.002 0	0.153 6	0.006 7	0.022 6	0.000 7	144.7	5.9	144.0	4.2	100
20BDS05-4-13	166	57.3	0.34	0.049 2	0.005 0	0.144 0	0.013 0	0.021 7	0.000 7	135.0	12.0	138.1	4.3	102
20BDS05-4-14	209	83.3	0.40	0.048 2	0.003 6	0.148 0	0.011 0	0.022 3	0.000 5	139.3	9.9	142.4	3.1	102
20BDS05-4-15	289	97.1	0.34	0.048 8	0.003 1	0.147 0	0.010 0	0.021 7	0.000 7	138.9	9.2	138.2	4.3	99
20BDS05-4-16	360	132	0.37	0.050 6	0.003 1	0.153 8	0.009 0	0.021 9	0.000 7	144.7	7.9	139.6	4.4	96
20BDS05-4-17	138	44.3	0.32	0.049 2	0.004 1	0.146 0	0.011 0	0.021 9	0.000 8	137.0	10.0	139.6	5.2	102
20BDS05-4-18	222	73.3	0.33	0.050 7	0.004 3	0.154 0	0.013 0	0.021 9	0.000 8	144.0	12.0	139.8	5.0	97
20BDS05-4-19	570	219	0.38	0.049 2	0.002 6	0.154 0	0.008 6	0.022 4	0.000 5	144.9	7.4	142.7	2.8	98
20BDS05-4-20	189	72.8	0.39	0.048 1	0.004 1	0.140 0	0.011 0	0.021 6	0.000 6	134.1	9.2	137.7	3.9	103
20BDS05-4-21	654	242	0.37	0.049 4	0.002 5	0.153 6	0.008 6	0.022 2	0.000 5	144.7	7.6	141.4	2.8	98
20BDS05-4-22	490	310	0.63	0.048 7	0.002 2	0.139 0	0.005 8	0.020 8	0.000 4	131.9	5.2	132.5	2.4	100
20BDS05-4-23	616	227	0.37	0.050 0	0.002 0	0.149 7	0.005 4	0.021 8	0.000 4	142.3	5.1	139.0	2.6	98
20BDS05-4-24	576	180	0.31	0.049 3	0.002 2	0.146 5	0.006 2	0.021 7	0.000 4	138.5	5.5	138.1	2.7	100
20BDS05-4-25	156	58.3	0.37	0.051 3	0.004 7	0.149 0	0.013 0	0.021 4	0.000 8	140.0	11.0	136.2	4.8	97

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表 2 磨盘山黑云母花岗岩锡石LA⁃ICP⁃MS U⁃Pb定年结果

Table 2. LA-ICP-MS U-Pb dating restules of cassiterites from the Mopanshan biotite granite

测点号	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	经²⁰⁷Pb校正的年龄(Ma)
测点号	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁶Pb/²³⁸U	1σ
20BDS05-4-3	0.047 3	0.002 2	0.141 7	0.005 2	0.021 3	0.000 2	136.7	1.845 8
20BDS05-4-4	0.056 4	0.003 3	0.169 4	0.009 1	0.021 4	0.000 3	132.8	2.657 3
20BDS05-4-6	0.047 6	0.003 0	0.141 0	0.007 7	0.021 3	0.000 2	136.6	2.168 5
20BDS05-4-7	0.050 0	0.002 0	0.146 2	0.005 2	0.021 0	0.000 2	133.3	1.860 7
20BDS05-4-9	0.053 8	0.002 4	0.162 2	0.007 4	0.021 6	0.000 2	135.3	1.738 4
20BDS05-4-10	0.054 9	0.002 1	0.164 3	0.006 1	0.021 6	0.000 3	134.7	2.117 8
20BDS05-4-11	0.101 3	0.002 3	0.358 1	0.008 0	0.025 6	0.000 2	131.9	9.119 2
20BDS05-4-13	0.063 8	0.001 6	0.204 9	0.005 4	0.023 3	0.000 1	140.4	2.573 4
20BDS05-4-14	0.070 2	0.019 5	0.166 9	0.009 1	0.021 3	0.001 5	125.1	13.372 4
20BDS05-4-15	0.060 6	0.001 4	0.179 6	0.004 2	0.021 5	0.000 1	131.1	1.997 2
20BDS05-4-17	0.050 6	0.001 7	0.149 0	0.005 3	0.021 3	0.000 2	135.1	1.357 6

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表 3 窟窿山石英正长斑岩和磨盘山花岗岩主量元素（%)和微量元素（10^-6)分析结果

Table 3. Major (%) and trace (10^‒6) element compositions from the Kulongshan porphyritic quartz syenite and the Mopanshan biotite granite

	窟窿山石英正长斑岩	磨盘山黑云母花岗岩
样品号	20BDS02-3	20BDS05-09-31	20BDS05-10-10	20BDS05-10-14
SiO₂	64.96	75.81	76.67	76.71
TiO₂	0.49	0.08	0.09	0.08
Al₂O₃	15.88	12.42	12.52	12.60
Fe₂O₃	1.01	0.33	0.44	0.29
FeO	3.06	0.86	0.75	0.74
MnO	0.05	0.03	0.03	0.02
MgO	1.24	0.05	0.07	0.05
CaO	1.52	0.52	0.08	0.08
Na₂O	4.04	3.69	3.29	3.51
K₂O	4.99	4.85	4.99	5.34
P₂O₅	0.12	0.01	0.01	0.01
LOI	1.70	0.72	0.71	0.59
Mg^#	41	9	12	10
A/CNK	1.07	1.01	1.14	1.08
DI	88.83	97.75	96.39	97.29
La	30.50	62.60	50.30	39.60
Ce	65.80	141.00	110.00	83.90
Pr	8.02	15.45	10.95	8.21
Nd	30.60	50.10	32.60	23.50
Sm	6.28	10.40	5.13	3.57
Eu	1.24	0.18	0.13	0.12
Gd	5.30	9.82	3.26	1.95
Tb	0.78	1.71	0.50	0.32
Dy	4.37	11.10	2.98	1.82
Ho	0.84	2.40	0.59	0.36
Er	2.20	7.46	1.69	1.14
Tm	0.32	1.28	0.29	0.22
Yb	2.16	8.71	1.97	1.39
Lu	0.35	1.33	0.30	0.23
V	48.00	< 5	6.00	< 5
Cr	10.00	< 10	< 10	< 10
Ni	3.70	0.40	0.30	0.40
Ga	24.40	26.80	25.80	25.10
Rb	109.00	574.00	606.00	575.00
Sr	321.00	22.80	18.00	20.50
Y	23.30	77.10	13.30	9.40
Zr	393.00	158.00	173.00	180.00
Nb	9.80	30.00	25.70	23.80
Ba	1 110.00	57.10	62.80	55.70
Hf	8.70	6.60	6.80	8.00
Ta	0.50	4.70	3.80	3.80
Pb	20.70	68.20	26.80	20.30
Th	9.15	93.10	75.90	71.20
U	2.42	16.10	27.80	14.75
Sn	2.00	15.00	17.00	36.00
ΣREE	157.52	323.36	220.56	166.21
LREE	142.44	279.73	209.11	158.90
HREE	15.08	43.63	11.45	7.31
LREE/HREE	9.45	6.41	18.26	21.74

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表 4 窟窿山石英正长斑岩和磨盘山黑云母花岗岩锆石微量(10^‒6)分析结果

Table 4. Results of trace element (10^‒6) of zircon from the Kulongshan porphyritic quartz syenite and Mopanshan biotite granite

测点号	Ti	Nb	Ta	Y	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	LREE-I指标	T(℃）	lgƒO₂
窟窿山
1	8.1	1.3	0.4	702.0	13.4	31.0	4.3	21.7	8.1	0.1	21.2	6.9	75.3	27.0	107.5	22.0	199.0	36.4	13	774.7	-16.0
2	5.2	1.0	0.4	638.0	-	5.2	0.1	1.1	3.4	0.1	19.1	5.7	65.1	23.0	103.7	19.3	179.0	33.0	78	732.5	-12.4
3	10.1	0.7	0.3	781.0	0.3	5.0	0.2	2.8	4.0	0.3	21.3	6.6	78.9	28.7	115.0	23.9	205.0	39.3	47	797.1	-15.4
4	13.9	2.3	0.5	3 800.0	0.1	6.9	0.9	17.9	37.7	1.9	152.0	46.1	483.0	152.0	576.0	99.0	884.0	157.0	40	831.3	-23.2
5	1.1	2.4	0.8	1 130.0	0.0	4.7	0.0	0.9	4.0	0.1	27.7	8.6	117.0	39.9	162.0	37.3	363.0	66.8	155	607.9	-11.5
6	9.8	0.6	0.3	1 338.0	0.0	3.2	0.2	4.9	9.4	0.4	46.1	13.4	152.0	50.2	205.0	39.9	358.0	61.2	47	794.0	-20.2
7	8.7	0.5	0.3	531.0	-	2.1	0.1	1.2	2.7	0.2	14.0	4.4	49.4	18.8	77.4	16.6	149.5	30.3	60	781.9	-15.6
8	7.1	1.9	0.7	768.0	-	6.7	0.0	1.4	3.6	0.0	20.8	6.3	79.4	25.5	112.1	24.0	196.0	39.7	79	761.8	-12.1
9	2.6	1.7	0.7	834.0	-	8.1	0.0	1.8	3.9	-	22.7	7.3	88.6	29.4	125.0	25.2	227.0	39.1	72	672.8	-12.2
10	13.8	0.1	0.0	1 056.0	-	3.5	0.3	3.2	6.5	1.8	27.7	9.1	102.1	37.7	158.5	35.9	307.0	62.3	47	830.5	-17.4
11	11.5	0.2	0.2	1 305.0	0.0	2.1	0.3	5.2	10.0	0.9	44.1	13.8	146.0	48.0	180.0	37.0	298.0	58.9	43	810.7	-22.3
12	4.9	1.1	0.5	656.0	-	5.6	0.1	1.2	2.7	0.1	18.7	5.5	64.5	23.8	96.4	19.9	178.0	34.7	78	727.1	-11.9
13	7.6	0.7	0.5	719.0	-	3.7	0.1	1.9	3.9	0.1	18.3	6.1	69.3	24.7	107.8	22.8	201.0	37.8	55	768.4	-15.1
14	10.1	0.8	0.4	551.0	-	3.3	0.0	1.2	2.5	0.1	13.6	4.7	56.7	20.6	84.7	18.6	159.0	30.8	69	797.1	-13.7
15	4.7	0.8	0.5	739.0	-	2.8	0.1	2.0	4.5	0.2	22.3	7.9	81.0	26.7	109.0	20.7	226.0	38.0	60	723.3	-16.9
16	6.0	0.9	0.4	1 930.0	0.0	5.2	0.4	7.5	14.9	0.6	71.8	20.4	232.0	72.1	280.0	52.5	426.0	87.4	47	745.7	-20.5
17	5.6	1.1	0.4	658.0	-	6.0	0.1	1.5	3.1	0.0	17.3	5.7	65.6	26.0	105.5	20.5	181.0	34.8	64	739.3	-12.5
18	9.2	0.8	0.2	653.0	-	3.4	0.1	1.7	2.5	0.1	18.1	5.6	61.6	23.2	97.5	20.0	181.0	32.3	61	787.5	-14.6
19	6.1	0.5	0.2	523.0	-	3.1	0.1	0.9	2.6	0.1	12.2	4.2	49.4	18.6	78.3	16.0	134.0	27.6	77	747.3	-13.1
20	9.9	0.5	0.2	516.0	-	2.6	0.0	0.9	2.1	0.0	12.1	4.0	50.0	18.9	78.7	15.4	156.0	27.1	83	795.1	-13.2
21	13.2	0.2	0.1	428.0	-	1.3	0.1	0.9	2.4	0.2	12.2	3.7	39.8	14.9	63.9	12.9	123.4	24.3	63	825.6	-16.6
22	8.9	1.6	0.6	763.0	-	6.4	0.1	1.8	4.3	0.0	20.2	7.1	82.0	26.9	117.1	25.0	220.0	38.1	65	784.2	-13.2
23	13.0	0.9	0.3	1 840.0	0.0	2.6	0.4	6.8	14.5	1.1	66.9	21.4	204.0	73.3	281.0	52.7	456.0	81.9	44	823.9	-22.6
24	7.0	1.1	0.4	803.0	-	4.4	0.1	2.0	4.4	0.2	25.0	7.1	87.1	28.8	121.8	24.3	221.0	39.1	64	760.4	-15.2
磨盘山
1	12.8	1.1	0.5	648.0	-	6.3	0.0	1.2	3.7	0.3	15.8	5.2	59.0	22.4	100.3	19.8	172.0	34.5	65	824.8	-12.6
2	6.6	2.7	1.5	959.0	3.0	21.9	1.0	6.4	5.2	0.3	22.5	8.3	94.3	33.1	143.0	31.6	275.0	51.5	33	822.3	-16.9
3	5.5	3.6	2.7	978.0	2.0	25.6	0.6	3.2	3.2	0.2	18.8	7.2	90.0	38.6	158.0	33.4	317.0	52.5	57	754.8	-17.2
4	11.2	1.2	0.9	739.0	0.1	9.7	0.1	1.5	3.6	0.3	18.9	6.8	70.3	26.6	110.6	23.1	204.0	37.8	66	737.6	-13.2
5	5.6	2.1	1.2	951.0	2.4	19.2	1.0	4.9	5.2	0.2	27.2	7.8	92.9	33.4	142.0	29.9	273.0	48.3	37	807.9	-15.9
6	12.0	1.2	0.4	574.0	-	6.2	0.0	1.5	2.9	0.2	11.6	4.3	56.0	22.0	87.0	17.1	172.0	25.6	56	739.3	-17.2
7	11.9	0.6	0.4	471.0	-	4.4	0.1	0.8	1.5	0.2	13.7	4.2	44.1	16.2	71.0	14.2	146.0	26.1	83	815.3	-17.1
8	12.5	1.2	0.7	729.0	-	7.8	0.0	1.3	3.4	0.3	19.8	6.5	67.5	26.4	102.3	22.9	197.0	38.8	74	814.4	-15.8
9	5.3	2.8	2.5	804.0	-	14.6	0.0	0.9	2.6	0.1	12.9	6.0	62.5	26.7	114.2	25.3	265.0	45.0	92	819.7	-16.0
10	9.8	0.6	0.5	497.0	-	7.0	0.0	0.7	2.1	0.2	11.1	4.5	50.6	17.9	74.2	15.0	149.0	27.8	93	794.0	-14.1
11	9.6	1.0	0.5	653.0	-	6.0	0.1	1.5	3.5	0.3	17.4	5.6	62.4	21.8	97.6	19.4	202.0	34.4	59	791.9	-17.6
12	6.1	3.2	1.5	801.0	-	13.9	0.0	1.5	3.4	0.1	17.2	6.2	75.8	27.3	118.4	25.9	235.0	42.9	73	747.3	-13.9
13	12.8	1.4	0.6	684.0	-	5.8	0.1	1.5	3.3	0.2	15.0	5.7	64.2	23.7	101.8	21.1	209.0	37.0	61	822.3	-17.4
14	9.0	1.3	0.7	734.0	-	6.8	0.2	1.6	4.1	0.4	22.1	6.4	69.9	27.1	113.3	22.3	224.0	38.0	60	785.3	-17.7
15	5.6	1.8	1.1	765.0	-	10.7	0.0	1.1	3.3	0.1	16.2	6.0	68.2	27.8	114.0	23.4	211.0	38.4	85	739.3	-14.0
16	13.1	1.5	0.9	832.0	-	11.6	0.1	1.3	3.2	0.2	19.0	6.4	78.1	27.7	123.6	26.6	231.0	45.3	84	824.8	-14.1
17	9.4	1.1	0.3	448.0	-	4.0	-	0.4	1.8	0.2	9.1	3.6	39.1	14.2	61.6	13.9	131.0	23.2	118	789.7	-14.2
18	5.6	1.6	0.8	605.0	-	8.9	0.0	0.8	2.0	0.2	15.1	4.6	58.1	22.7	98.7	19.6	201.0	34.4	104	739.3	-12.9
19	3.4	2.8	1.9	917.0	2.0	22.1	0.8	5.5	4.8	0.0	23.5	7.5	84.6	33.1	137.1	31.0	268.0	51.6	33	695.0	-16.5
20	5.2	0.9	0.5	632.0	-	6.8	0.0	0.6	2.2	0.2	15.8	5.4	66.9	22.4	87.7	18.4	177.0	32.8	140	732.5	-13.8
21	4.8	3.1	1.9	1 009.0	-	15.5	-	1.1	3.6	0.1	22.8	7.4	98.0	35.6	154.0	30.9	296.0	51.2	116	725.2	-12.6
22	11.9	1.9	0.9	1 013.0	-	12.8	0.1	2.3	4.3	0.4	26.8	9.0	101.1	36.9	147.0	31.2	292.0	52.9	67	814.4	-16.1
23	3.6	3.0	1.7	941.0	-	15.6	0.0	1.2	3.2	0.1	21.6	7.5	87.3	32.5	140.0	30.3	263.0	50.9	99	699.9	-12.7
24	4.8	4.3	1.9	1371.0	-	15.8	0.1	1.8	5.1	0.2	31.0	10.9	124.0	47.9	212.0	44.6	419.0	79.9	93	725.2	-14.1
25	9.2	0.7	0.6	633.0	-	8.2	0.0	1.0	2.8	0.3	14.7	5.7	64.8	20.3	95.2	21.0	171.0	32.6	91	787.5	-14.7
注：窟窿山样号20BDS02; 磨盘山样号20BDS05. LREE-I指标小于50的数据, 表明存在蜕变和包裹体的影响.温度氧逸度数据未在后续讨论中使用.

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表 5 窟窿山和磨盘山岩体黑云母主量元素组成(%)

Table 5. Major elements (%) of biotite from the Kulongshan and Mopanshan area

	窟窿山				磨盘山
样品号	20BDS02				20BDS05
SiO₂	35.36	35.22	35.64	36.10	35.54	35.44	35.32	35.49	35.37	35.88
TiO₂	3.11	3.13	3.19	3.13	2.53	2.53	2.44	2.36	2.52	2.30
Al₂O₃	18.45	17.54	17.33	18.60	18.41	18.40	17.91	18.27	18.34	18.23
FeO^T	27.23	26.45	27.53	26.40	27.00	27.32	26.23	26.78	26.69	27.04
MnO	0.76	0.75	0.79	0.55	0.34	0.29	0.31	0.32	0.37	0.33
MgO	2.60	2.60	2.61	2.65	1.54	1.57	1.55	1.47	1.60	1.43
Na₂O	0.20	0.18	0.22	0.20	0.07	0.15	0.12	0.17	0.16	0.17
K₂O	8.67	8.57	8.61	8.49	8.64	8.74	8.60	8.85	8.94	8.66
F	1.07	1.15	1.07	1.17	1.42	1.24	1.59	1.47	1.81	1.79
Cl	0.07	0.06	0.03	0.05	0.33	0.30	0.32	0.32	0.34	0.38
O=F, Cl	0.47	0.50	0.46	0.50	0.67	0.59	0.74	0.69	0.84	0.84
H₂O_calc	3.32	3.21	3.30	3.29	2.99	3.09	2.84	2.94	2.77	2.78
Total_calc	100.37	98.36	99.86	100.15	98.13	98.48	96.48	97.76	98.06	98.15
离子数基于22个氧原子
Si	5.52	5.60	5.60	5.60	5.69	5.65	5.75	5.71	5.70	5.77
Al(Ⅳ)	2.48	2.40	2.40	2.40	2.31	2.35	2.25	2.29	2.30	2.23
Al(Ⅵ)	0.91	0.89	0.81	1.00	1.16	1.11	1.19	1.18	1.19	1.22
Ti	0.36	0.37	0.38	0.37	0.30	0.30	0.30	0.29	0.31	0.28
Mn	0.10	0.10	0.10	0.07	0.05	0.04	0.04	0.04	0.05	0.05
Mg	0.61	0.62	0.61	0.61	0.37	0.37	0.38	0.35	0.38	0.34
Fe²⁺	3.02	2.98	3.08	2.87	3.04	3.08	3.00	3.04	3.04	3.06
Na	0.06	0.06	0.07	0.06	0.02	0.05	0.04	0.05	0.05	0.05
K	1.73	1.74	1.73	1.68	1.76	1.78	1.79	1.82	1.84	1.78
T(℃)	658.93	663.28	664.02	659.37	627.51	626.76	624.17	616.34	628.18	610.98
lgƒO₂	-10.50	-10.50	-12.74	-11.42	-19.08	-19.11	-19.19	-19.46	-19.06	-19.64
Ⅳ(F)	1.27	1.24	1.28	1.24	1.08	1.15	1.02	1.06	0.95	0.96
Ⅳ(Cl)	-2.96	-2.87	-2.52	-2.85	-3.59	-3.54	-3.60	-3.58	-3.63	-3.66

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参考文献(52)

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大兴安岭南段北大山含锡石与不含锡石花岗岩特征对比

doi: 10.3799/dqkx.2021.235

作者简介:
丁磊磊（1988-），女，博士后，主要从事火山岩成因机制及矿床研究. ORCID：0000-0002-4686-8898. E-mail：leilei928@126.com

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王玉往，E-mail: wyw@cnncm.com

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Comparison on the Characteristics of Cassiterite-Bearing and Barren Granites in the Beidashan Region, Southern Great Xing'an Range

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大兴安岭南段北大山含锡石与不含锡石花岗岩特征对比

doi: 10.3799/dqkx.2021.235

作者简介: 丁磊磊（1988-），女，博士后，主要从事火山岩成因机制及矿床研究. ORCID：0000-0002-4686-8898. E-mail：leilei928@126.com

通讯作者: 王玉往，E-mail: wyw@cnncm.com

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Comparison on the Characteristics of Cassiterite-Bearing and Barren Granites in the Beidashan Region, Southern Great Xing'an Range

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出版历程

目录

作者简介:
丁磊磊（1988-），女，博士后，主要从事火山岩成因机制及矿床研究. ORCID：0000-0002-4686-8898. E-mail：leilei928@126.com

通讯作者:
王玉往，E-mail: wyw@cnncm.com