| 张会琼,王京彬,王玉往,石煜,孙紫坚.山西支家地银铅锌矿床地质特征与矿化分带[J].矿产勘查,2025,16(5):1043-1053 |
| 山西支家地银铅锌矿床地质特征与矿化分带 |
| Geological characteristics and mineralization of Zhijiadi Pb-Zn-Ag deposit, Shanxi Province, China |
| 投稿时间：2025-03-25 |
| DOI：10.20008/j.kckc.202505009 |
| 中文关键词: 地质特征 矿化类型 垂向分带 支家地中图分类号:P612文献标志码:A文章编号:1674-7801(2025)05-1043-11 |
| 英文关键词: geological characteristics mineralization types vertical zoning Zhijiadi |
| 基金项目:本文受全国危机矿山接替资源找矿项目(200699105)资助。 |
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| 中文摘要: |
| 支家地银铅锌矿床是晋北银多金属矿集区典型的浅成低温热液型矿床，其成矿与早白垩世陆相火山-侵入杂岩密切相关。本文通过系统野外地质调查、岩相学分析及地球化学研究，识别出矿床发育 3类矿化类型:受断裂控制的脉状矿化、隐爆角砾岩型矿化及深部类斑岩型矿化，构成“脉状-隐爆角砾岩筒-类斑岩型”三位一体成矿组合。矿区垂向分带特征显著，自上而下划分为 4个带:Ⅰ带(Mn(Ag)蚀变晕)、Ⅱ带(脉状矿化带，Ag-Pb-Zn)、Ⅲ带(脉状+筒状矿化带，Ag-Pb-Zn)及Ⅳ带(类斑岩型矿化带，Pb-Zn)。控矿构造以 NW向 F.断裂为主导，其与石英斑岩成矿地质体的时空耦合关系控制了矿体的空间分布。研究揭示了浅部脉状矿化向深部类斑岩型矿化的演化规律，提出石英斑岩接触带与断裂复合部位是深部找矿的关键靶区。该成果深化了浅成低温热液型矿床成矿理论，为区域深边部资源勘查提供了重要依据。 |
| 英文摘要: |
| The Zhijiadi Ag-Pb-Zn polymetallic deposit, a representative epithermal deposit in the northernShanxi polymetallic ore cluster, is genetically related to Early Cretaceous continental volcanic-intrusive complexes.Based on detailed field investigations, petrographic studies, and geochemical analyses, three mineralization types areidentified: fault-controlled vein-type, cryptoexplosive breccia pipe-type, and porphyry-like mineralization, forming a "vein-breccia pipe-porphyry" metallogenic assemblage. The vertical zoning of the deposit is divided into fourzones: Zone I (Mn(Ag) alteration halo), Zone II (vein-type Ag-Pb-Zn mineralization), Zone III (vein + pipe-type Ag-Pb-Zn mineralization), and Zone IV (porphyry-like Pb-Zn mineralization). The NW-striking F. fault system andquartz porphyry intrusions jointly control the spatial distribution of orebodies. The study reveals an evolutionarytrend from shallow vein-type to deep porphyry-like mineralization, highlighting the contact zones between quartzporphyry and faults as key targets for deep exploration. This research advances the understanding of epithermal min.eralization mechanisms and provides critical guidance for deep resource prospecting in similar volcanic terrains. |
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