| 内蒙古三河铅锌矿床的矿化特征及构造控矿规律 |
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| 引用本文： | 毕亚强,李永新,陈文科,马虎彪,于超,冯宇,周林,岳雷,杨在京,扈德峰.内蒙古三河铅锌矿床的矿化特征及构造控矿规律[J].地质力学学报,2022,28(1):36-49. |
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| 作者姓名： | 毕亚强 李永新 陈文科 马虎彪 于超 冯宇 周林 岳雷 杨在京 扈德峰 |
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| 作者单位： | 1.呼伦贝尔山金矿业有限公司, 内蒙古 呼伦贝尔 022357 |
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| 基金项目： | 国家重点研发计划（2017YFC0601300） |
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| 摘 要： | 以内蒙三河铅锌矿床为研究对象,通过详细的野外和井下地质调研、 勘查资料综合分析、 构造地质测量、矿石和蚀变岩的岩石学和矿物学研究等,对矿区主要的构造类型、产状特征、脉体和蚀变的类型及矿化与断裂构造的关系进行了详细的研究.研究结果表明,矿区矿体主要呈脉状-网脉状产于北西西向断裂构造中.根据矿区断裂-脉体类型-蚀变的关系可...
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| 关 键 词： | 三河铅锌矿床 矿化特征 构造控矿规律 围岩蚀变 找矿标志 |
| 收稿时间： | 2021/9/29 0:00:00 |
| 修稿时间： | 2021/11/15 0:00:00 |
Mineralization styles and structure-controlled mineralization rules of the Sanhe Pb-Zn Deposit in Inner Mongolia |
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| BI Yaqiang,LI Yongxin,CHEN Wenke,MA Hubiao,YU Chao,FENG Yu,ZHOU Lin,YUE Lei,YANG Zaijing,HU Defeng.Mineralization styles and structure-controlled mineralization rules of the Sanhe Pb-Zn Deposit in Inner Mongolia[J].Journal of Geomechanics,2022,28(1):36-49. |
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| Authors: | BI Yaqiang LI Yongxin CHEN Wenke MA Hubiao YU Chao FENG Yu ZHOU Lin YUE Lei YANG Zaijing HU Defeng |
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| Institution: | 1.Hulunbuir Mountain Gold Mining Co., Ltd, Hulunbuir 022357, Inner Mongolia, China2.School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The Sanhe Pb-Zn deposit is studied in this paper through detailed field and underground geological investigations, structural geological surveys, drilling profile analysis combined with petrological and mineralogical analysis of ores and altered wall-rocks. We then discussed the ore-controlling structures and their distribution patterns, the styles of mineralization and alteration, the coupling relation between the mineralization and fault structures. Our results show that the mineralization in the Sanhe deposit show structure-controlled characteristics, and with dominant ore bodies trending NWW, dipping SSW. The extent of the ore-controlling faults can reach hundreds of meters to a few kilometers long, with relative stable occurrence. In the field, the ore-controlling faults occur as altered foliated zones but with tensional breccia veins and druse texture in them, showing a reactivated shear fault signature. NWW- and NNE- trending faults show post-ore deformation characteristics and usually with lamprophyre, syenite porphyry or calcite ±quartz ±fluorite ±clay mineral veins occuring in them. The NNW- and NNE- trending faults and related veins crosscut the mineralized carbonate-quartz veins and NWW-trending faults indicating a post-ore brittle deformation and hydrothermal activity. The post-ore faults and related hydrothermal veins usually occur as branching, bifurcation or irregular shapes and with druse texture in the center of the veins implying a extensional faults. Although the post-ore faults can slightly dislocate the ore bodies and contemporaneous hydrothermal veins, the displacement is negligible for exploration. The alteration around the non-mineralized calcite veins is dominated by clay alteration together with minor disseminated pyrite. Combined the structure-controlled mineralization and the alteration related Pb-Zn minerlization, it is concluded that the NWW-tending faults with silicification, pyritization, chloritization alteration halo, can be used as significant prospecting criteria in the deposit and the neighbouring area. |
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| Keywords: | Sanhe lead-zinc deposit mineralization styles structure-controlled mineralization rules wall-rock alteration ore prospecting criteria |
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