内蒙古神山矿区伊力特岩体南侧深部找矿探讨

DISCUSSION ON THE DEEP OREBODY PROSPECTING OF THE SHENSHAN OREFIELD ON THE SOUTHERN SIDE OF THE YILITE PLUTON,INNER MONGOLIA

采用可控源音频大地电磁法(CSAMT)在内蒙古神山矿区伊力特岩体南侧进行深部构造探测研究,探测结果显示地下电性结构差异明显,具上部与下部的高阻层夹中间低阻层的电性层特征,并较好地分辨出该地区深部地层与伊力特岩体的接触面构造及由侵入岩体上侵所引起的侵位断裂构造等空间展布特征,并与区域构造有较好的对应关系.通过概略揭露地下岩体深部构造的形态特征,推测出侵位断裂构造与接触界面构造叠加复合部位可能为赋矿有利地段.

The method of controlled source audio frequency magnetotelluric sounding （CSAMT） is applied in the prospecting of deep structures on the southern side of the Yilite pluton in the Shenshan Fe-Cu orefield, Inner Mongolia. The results show obviously different electrical characteristics in the layers vertically. The low resistance layer is sandwiched by upper and lower layers with high resistance. According to the distribution patterns of resistivity isolines, the emplacement boundaries between strata and Yilite pluton are inferred, and two emplacement faults correlated well with regional tectonic are identified. Study reveals that the superimposed positions of such boundaries and faults are favorable for polymetallic metallogenesis.