内蒙古二道河子铅锌矿床构造控矿作用及找矿方向

内蒙古二道河子铅锌矿床位于大兴安岭得尔布干多金属成矿带。通过详细的野外地质调查,矿区发育有NE、NW、近SN向等3组断裂构造。矿体主要呈脉状—网脉状产出于NW向断裂构造带中,断层面平直,延伸稳定。矿体与围岩界线明显,矿石结构完整。矿化围岩主要为流纹质岩屑晶屑凝灰岩;NE向次级断层内充填梳状石英脉,矿化较弱,截断NW向矿体但位移距离不大;SN向断层挫距较大,对矿床起一定的破坏作用。矿区发育的NE、NW向构造为成矿期前或成矿期得尔布干断裂的次级断裂构造,NW向构造早期具有压剪性构造特征,成矿期为张性环境,成矿期后封闭;NE向断裂在成矿期为挤压环境,成矿期后有继承性活动;SN向断裂为成矿期后构造。围...

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Published in地球科学与环境学报 Vol. 38; no. 6; pp. 791 - 802
Main Author 李兴 刘云华 关强兵 刘方杰 李欢 尚志辉
Format Journal Article
LanguageChinese
Published 长安大学地球科学与资源学院,陕西西安,710054%陕西有色金属控股集团有限责任公司,陕西西安,710075%西南能矿集团股份有限公司,贵州贵阳,550004 2016
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Summary:内蒙古二道河子铅锌矿床位于大兴安岭得尔布干多金属成矿带。通过详细的野外地质调查,矿区发育有NE、NW、近SN向等3组断裂构造。矿体主要呈脉状—网脉状产出于NW向断裂构造带中,断层面平直,延伸稳定。矿体与围岩界线明显,矿石结构完整。矿化围岩主要为流纹质岩屑晶屑凝灰岩;NE向次级断层内充填梳状石英脉,矿化较弱,截断NW向矿体但位移距离不大;SN向断层挫距较大,对矿床起一定的破坏作用。矿区发育的NE、NW向构造为成矿期前或成矿期得尔布干断裂的次级断裂构造,NW向构造早期具有压剪性构造特征,成矿期为张性环境,成矿期后封闭;NE向断裂在成矿期为挤压环境,成矿期后有继承性活动;SN向断裂为成矿期后构造。围岩岩性对成矿具有重要的控制作用。结合物探与化探异常特征,矿区西北部偏酸性岩石分布范围内的NW、NE向构造交汇部位是寻找厚大富集型矿体的最有利靶区,深部岩性不整合面及火山穹窿可能是寻找似层状矿体的有利位置。
Bibliography:LI Xing1 , LIU Yun-hua1, GUAN Qiang-bing2, LIU Fang-jie2 , LI Huan1 , SHANG Zhi-hui3 (1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2. Shaanxi Nonferrous Metals Holding Group Co. , Ltd. , Xi'an 710075,Shaanxi, China; 3. Southwest Energy and Mineral Resources Corporation Co. , Ltd. , Guiyang 550004, Guizhou, China)
Located in the northwest of Derbugan fault,the Erdaohezi Pb-Zn deposit belongs to Derbugan metallogenic belt in Great Xing'an Range.Through the detailed field geological survey,NE-,NW-,nearly SN-trending fault systems develop in Erdaohezi mining area.The orebodies are controlled by NW-trending faults,which have flat fault plane and stable extension,with mainly vein-stockwork type.The lines between orebodies and wall-rocks are obvious,and the ore textures are integrated.The ore-hosting rocks are mainly rhyolitic lithic crystal tuff.NE-trending secondary faults are filled with a lot of comb-type quartz,and the mineralization is weak;they crosscut the NW-tr
ISSN:1672-6561