| 内蒙古白音诺尔铅锌矿床成矿流体特征 |
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| 引用本文： | 于琪,王可勇,韩乾,张雪冰,王承洋,李剑锋,王泽海.内蒙古白音诺尔铅锌矿床成矿流体特征[J].世界地质,2015,34(1):102-112. |
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| 作者姓名： | 于琪 王可勇 韩乾 张雪冰 王承洋 李剑锋 王泽海 |
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| 作者单位： | 1. 吉林大学 地球科学学院，长春 130061; 2. 内蒙古山金地质矿产勘查有限公司，内蒙古 赤峰 024005; 3. 内蒙古赤峰地质矿产勘查开发院，内蒙古 赤峰 024000 |
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| 摘 要： | 内蒙古白音诺尔铅锌矿床为一大型矽卡岩型矿床。成矿作用分为两期5个阶段,包裹体显微测温研究表明:Ⅰ-1阶段主要发育气液两相包裹体(VL型)、富气相包裹体(LV型)及含Na Cl子矿物三相包裹体(SL型)。VL型包裹体均一温度变化范围为375.4℃~479.8℃,盐度为10.73%~13.73%Na Cleqv;LV型包裹体均一温度变化范围为415.2℃~458.4℃,盐度为5.32%~7.67%Na Cleqv;SL型包裹体均一温度变化范围为434.6℃~497.5℃,盐度为42.15%~45.25%Na Cleqv。Ⅰ-1阶段流体属中-高温、高盐度的不混溶Na Cl--H2O体系热液。Ⅰ--2阶段发育VL型和LV型两类包裹体,VL型包裹体均一温度的变化范围为202.3℃~345.7℃,盐度为5.17%~11.22%Na Cleqv;LV型包裹体均一温度为265.7℃~381.9℃,盐度1.98%~5.01%Na Cleqv。Ⅰ--2阶段流体性质为中温、中等盐度的不均匀Na Cl--H2O体系热液。Ⅱ--2阶段(主成矿阶段)主要发育VL型包裹体,均一温度分布于165.9℃~258.7℃,盐度为0.83%~5.62%Na Cleqv,说明流体性质为中--低温、低盐度的均一Na Cl--H2O体系热液。在流体由中--高温、高盐度不均匀Na Cl--H2O体系向中--低温、低盐度的均一Na Cl--H2O体系热液演化的过程中,金属元素逐渐富集并最终形成矿床。包裹体中碳氢氧同位素的研究证明早期流体来源以岩浆水为主,并有少量大气降水的参与;而晚期流体来源主要为大气降水。
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| 关 键 词： | 白音诺尔铅锌矿床 成矿流体特征 地质特征 内蒙古 |
Metallogenic fluid characteristics of Baiyinnuo'er Pb- Zn deposit of Inner Mongolia |
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| YU Qi,WANG Ke-Yong,HAN Qian,ZHANG Xue-Bing,WANG Cheng-Yang,LI Jian-Feng,WANG Ze-Hai.Metallogenic fluid characteristics of Baiyinnuo'er Pb- Zn deposit of Inner Mongolia[J].World Geology,2015,34(1):102-112. |
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| Authors: | YU Qi WANG Ke-Yong HAN Qian ZHANG Xue-Bing WANG Cheng-Yang LI Jian-Feng WANG Ze-Hai |
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| Institution: | 1. College of Earth Sciences，Jilin University，Changchun， 130061，China; 2. Shandong Gold Geological Minerals Survey Co. ，Ltd，Chifeng 024005，Inner Mongolia，China; 3. Inner Mongolia Chifeng Institute of Geology and Mineral Exploration and Development，Chifeng，Inner Mongolia， 024000 |
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| Abstract: | The Baiyinnuo'er Pb- - Zn mineral deposit is a large skarn- type deposit． The mineralization is in two periods and five stages． The research on fluid inclusion micro- thermometry indicates that in the stage Ⅰ- 1 are mainly developed the aqueous two- phase inclusions， vapor- rich inclusions and NaCl daughter mineral- bearing three- phase fluid inclusions． The homogenization temperatures of aqueous two- phase fluid inclusions range from 375. 4 ℃ to 479. 8 ℃，and the salinity varies from 10. 73%to 13. 73%NaCleqv． The homogenization temperatures of vapor- rich fluid inclusions range from 415. 2℃ to 458. 4℃，and the salinity varies from 5. 32% to 7. 67%NaCleqv． The homogenization temperatures of NaCl daughter mineral- bearing three- phase fluid inclusions range from 434. 6℃ to 497. 5℃，and the salinity varies from 42. 15% to 45. 25% NaCleqv． The fluid inclusions of stage Ⅰ- 1 belong to the immiscible NaCl － H 2 O hydrothermal system with medium- high temperature and high salinity． Stage Ⅰ- 2 main- ly develops two types of fluid inclusions． The homogenization temperatures of aqueous two- phase fluid inclusions range from 202. 3 ℃ to 345. 7 ℃，and the salinity varies from 5. 17% to 11. 22% NaCleqv． The homogenization temperatures of aqueous two- phase fluid inclusions range from 265. 7℃ to 381. 9℃，and the salinity varies from 1. 98% to 5. 01 NaCleqv． The fluid inclusions of stage Ⅰ- 2 belong to the immiscible NaCl － H 2 O hydrothermal system with medium temperature and medium salinity． In the stage Ⅱ- 2 (main metallogenic stage) are mainly de- veloped the aqueous two- phase fluid inclusions，in which the homogenization temperatures range from 165. 9℃ to 258. 7℃，and the salinity varies from 0. 83% to 5. 62%NaCleqv． The fact indicates that the fluid inclusions of the stage Ⅱ- 2 belong to the uniform NaCl － H 2 O hydrothermal system with medium- low temperature and low salinity． In the process of the evolution from the immiscible NaCl － H 2 O hydrothermal system with medium- high temperature and high salinity to the uniform NaCl － H 2 O hydrothermal system with medium- low temperature and low salinity， the metallic element gradually enriches and forms the industrial ore body eventually． The study on the C，H，O i- sotope in the fluid inclusions indicates that the early fluid mainly comes from magmatic water，with the participation of a small amount of atmospheric precipitation; and the main source of later fluid inclusions is atmospheric precipi- tation． |
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| Keywords: | Baiyinnuoer Pb-Zn deposit metallogenic fluid characteristics geological characteristics Inner Mongolia |
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