摘要
根据矿集区板块构造环境和矿体分布特征,对成矿构造进行规律性研究。研究表明,花敖包特矿集区位于古亚洲洋北缘板块俯冲增生杂岩带之中,带内发育含蛇绿岩的大型叠瓦状推覆构造,矿体主要分布在推覆体前锋带陡立的容矿断层空腔,推覆体前方基底与前锋断裂大角度相交的陡立容矿断裂处,推覆体内部陡立的控矿断裂和平缓的叠瓦状断层内。根据陡立脉状矿体断裂分析,矿床主要受两期区域构造应力场作用而形成的共轭断裂控制,早期受NE—SW向挤压碰撞形成的近EW和NE向共轭断裂控制,并形成了宽大的板柱状—囊状矿体;晚期受NNW—SSE向挤压碰撞形成的NW和NNE向共轭断裂控制,形成陡立的脉状矿体,同时在推覆体叠瓦状断层内形成了平缓透镜状矿体。
The regularity of metallogenic structures is studied according to the plate tectonic environment and the distribution characteristics of ore bodies in the ore concentration area.The research shows that the Huaaobaote ore concentration area is located in the subduction accretionary complex belt of the northern margin of the ancient Asian Ocean plate,in which a large imbricated nappe structure containing ophiolite is developed.The ore bodies are mainly distributed in the cavity of the steep ore bearing fault in the forward zone of the nappe body,the steep ore bearing fault intersecting with the forward fault at a large Angle in the basement in front of the nappe body,steep ore-controlling fault inside the nappe and the gentle imbricated fault.According to the fracture analysis of the steep vein ore body,the deposit is mainly controlled by the conjugated faults formed by the regional tectonic stress field in two stages,and by the near EW and NE conjugate faults formed by the NE-SW compression collision in the early stage,and a wide plate-columnar-sac ore body is formed.In the late period,the NW and NNE conjugate faults formed by the NNW-SSE compression collision formed a steep vein ore body,and a gentle lens-like ore body formed in the imbricated fault of nappe body.
作者
刘永高
赵胜金
方曙
李振祥
高陇平
易慧能
周颖帅
程慕利
LIU Yonggao;ZHAO Shengjin;FANG Shu;LI Zhenxiang;GAO Longping;YI Huineng;ZHOU Yingshuai;CHENG Muli(Inner Mongolia Tenth Geological Mineral Exploration and Development Co.,Ltd.;Northeast Geological S&T Innovation Center of China Geological Survey;Inner Mongolia Yulong Mining Co.,Ltd.)
出处
《现代矿业》
2025年第4期143-148,共6页
Modern Mining
基金
中国地质调查局东北地质科技创新中心区创基金项目(编号:QCJJ2023-09)
中国地质调查局项目(编号:DD20160048-15)
内蒙古自治区自然科学基金项目(编号2024MS04004)
内蒙古自治区“草原英才”工程专项资金(编号:YXGCS012011)。
关键词
推覆构造
推覆体锋带
叠瓦状断层
共轭断裂
花敖包特矿集区
nappe teetonics
nappe front
imbricate faults
conjugated faults
Huaaobaote ore concentration area
