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内蒙古科右前旗复兴屯银铅锌多金属矿床的发现及其意义
- 作者：
- 李敏|赵忠海|李海军|常时旗|顾宁|段海龙|周立军|梁杉杉
- 作者单位：
- 内蒙古国土资源勘查开发有限责任公司|辽宁工程技术大学矿业学院|内蒙古国土资源勘查开发有限责任公司|内蒙古国土资源勘查开发有限责任公司|内蒙古国土资源勘查开发有限责任公司|内蒙古国土资源勘查开发有限责任公司|内蒙古地质矿产（集团）有限责任公司|辽宁工程技术大学矿业学院
基金项目：
- 内蒙古自治区地勘基金项目（11-1-KC11）；辽宁省自然科学基金项目（2020-BS-258）；辽宁省教育厅科学研究经费项目（LJ2020JCL010）；辽宁工程技术大学学科创新团队资助项目（LNTU20TD-14）
详细信息：
- 作者简介：
- 李敏（1985—），男，内蒙古呼和浩特人，高级工程师，从事地质矿产勘查工作；呼和浩特市赛罕区大学西街明珠巷33号，内蒙古国土资源勘查开发有限责任公司，010020；E-mail：331935708@qq.com
- 通讯作者：
- E-mail：zhaozhonghai@lntu.edu.cn，15241879933
- PDF下载
Discovery and significance of Fuxingtun Ag-Pb-Zn Polymetallic Deposit in the Keyouqianqi,Inner Mongolia
- English Author：
- Inner Mongolia Land Resources Exploration and Development Co.,Ltd.|College of Mining,Liaoning Technical University|Inner Mongolia Land Resources Exploration and Development Co.,Ltd.|Inner Mongolia Land Resources Exploration and Development Co.,Ltd.|Inner Mongolia Land Resources Exploration and Development Co.,Ltd.|Inner Mongolia Land Resources Exploration and Development Co.,Ltd.|Inner Mongolia Geology and Minerals(Group)Limited|College of Mining,Liaoning Technical University
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
复兴屯银铅锌多金属矿床位于大兴安岭中南段银多金属成矿带，为陆相火山—次火山热液型银铅锌多金属矿床。金属矿物主要有针碲金银矿、自然银、银黝铜矿、闪锌矿、方铅矿、黄铜矿等；脉石矿物主要有菱锰矿、菱铁矿、石英、长石及绢云母等。矿石结构主要为半自形—他形粒状结构、交代结构、胶状结构等；矿石构造主要为浸染状构造、角砾状构造及细脉浸染状构造。矿体主要赋存在北东向和北西向断裂交会部位，产于满克头鄂博组火山角砾岩、流纹质凝灰岩、角砾凝灰岩中，均为隐伏矿体，总体呈“拱形”产出。矿床的发现得益于物化探综合找矿方法，其中土壤测量综合异常显示Ag、Pb、Zn异常规模大、强度高，浓集中心明显；1∶1万激电中梯测量结果显示，矿体具有低阻高极化异常特征。通过钻探工程对深部激电异常进行查证，发现大型银铅锌多金属矿体。综合成矿地质分析，认为矿体受火山机构控制明显，成矿与火山—次火山热液活动关系密切，火山构造和次火山岩侵入体派生的同生裂隙系统控制了矿体的产出。复兴屯银铅锌多金属矿床的发现对该区域寻找同类型矿床提供了新的找矿思路和方向，采用的物化探综合找矿方法为下一步找矿提供了重要勘查经验，具有显著的理论和勘查意义。
关键词:
地质特征；找矿标志；银铅锌多金属矿床；复兴屯；内蒙古
Abstract:
Fuxingtun Ag-Pb-Zn Polymetallic Deposit,which is a continental facies volcanic-subvolcanic hydrothermal Ag-Pb-Zn Polymetallic Deposit,is located in the silver polymetallic metallogenic belt in the middle and southern section of the Greater Khingan Range.Metal minerals are mainly sylvanite,naive silver,freibergite,sphale-rite,galena,chalcopyrite,and so on;the gangue minerals are mainly rhodochrosite,siderite,quartz,feldspar,sericite,and so on.The ore textures are mainly subhedral-anhedral granular texture,metasomatic texture,and colloidal structure; the ore structures are mainly disseminated structure,brecciated structure,and veinlet disseminated structure.The ore bodies that are concealed and overall arch output mainly occur at the intersection of NE and NW trending faults and are hosted in volcanic breccia,rhyolite,rhyolite tuff,breccia tuff,sedimentary tuff of the upper Jurassic Manketouebo Formation.The discovery of the deposit has benefited from integrated geophysical and geochemical prospecting methods.Soil survey composite anomaly results show that Ag,Pb,and Zn anomalies are large in scale,high in inten-sity,and obvious in concentration.Meanwhile,the 1:10 000 induced polarization intermediate gradient survey shows that the ore body is characterized by low resistivity and high polarization.Large-scale Ag-Pb-Zn polymetallic ore bodies were found by drilling engineering to verify induced polarization anomalies deep in the deposit.The comprehensive geological analysis concludes that the ore bodies are controlled by a volcanic mechanism obviously,and that mineralization is closely related to volcanic-subvolcanic hydrothermal activity.The ore body output is controlled by the syngenetic fracture system derived from the volcanic structure and subvolcanic intrusion body.The discovery of the Fuxingtun Ag-Pb-Zn polymetallic deposit provides a new idea and direction for prospecting the same type of deposits in this area and the integrated geophysical and geochemical prospecting method adopted provides important exploration experience for further prospecting,which has great theoretical and prospecting significance.
Keywords:
geologic characteristics;ore-prospecting indicator;Ag-Pb-Zn polymetallic deposit;Fuxingtun;Inner Mongolia
