The Cause and Prospecting Significance of Ring Structures from Zhengxiangbaiqi in Inner Mongolia
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摘要: 环形构造作为一种指示信息对找矿具有非常重要的意义和价值.借助卫星遥感影像和物化探异常等对正镶白旗环形构造及其找矿信息进行了深入探讨.正镶白旗环形构造最大环H5直径约30 km,边部发育有不同方向的区域断裂.矿产分布在断裂交汇处,并与火山机构和岩浆岩侵入有关.对其成因分析表明,正镶白旗环形构造是晚二叠世以来深部岩浆作用与区域断裂共同作用的结果,由侵入岩及其与围岩接触蚀变引起的.小环形构造是良好的成矿部位,大环形构造的边缘地区是找矿的远景地带.Abstract: The ring structure as an indicator has great significance and value for prospecting .On the base of satellite remote sensing images and geophysical and geochemical anomalies , the annular configuration and prospecting information in Zhengxiangbaiqi are analyzed in depth .The biggest circular H5 is about 30 km in diameter .Edge regional faults have different directions .Mineral re-source is located in fracture interchange , which is also related to volcanic and magmatic intrusion . Regional geological survey ( 1:50000 ) shows that Zhengxiangbaiqi ring structure is the result of Late Permian magmatism and its deep regional faults joint action , and caused by contact alteration of the intrusive rocks and wall rock .Small ring structure is a good metallogenic area , and the edge area of large ring structure is a prospective area of ore prospecting .
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