综合物探方法在航磁异常查证中的应用

Application of comprehensive geophysical exploration method in verification of aeromagnetic abnormal

利用已有的地质、钻探资料,结合当前地面高精度磁测成果,缩小找矿靶区,结合该区的物性特征,布设少量的磁、重、电综合剖面是一种快速评价找矿前景的有效方法。河南省社旗县青台-唐河县源潭航磁异常查证通过1∶1万地面高精度磁法扫面工作,确定了12个局部异常区,缩小了找矿坝区,结合该区物性特征,选择了磁、重、电联合剖面综合测量,引用了工作区内李店地区SDC-05高磁异常钻孔(ZK101、ZK201)资料及岩芯标本磁参数,通过磁、重、电联合剖面的正反演,快速确定了该异常为含磁铁矿化辉长岩体引起,初步确定了磁性体的规模及埋深状态,得出了岩体无明显磁铁矿分异富集特征,不足以形成工业矿体,暂不实施钻探验证,节约了勘探施工资金。

Using the existing geological and drilling data and combined with the current high-precision magnetic survey results to reduce the prospecting dam area,and combined with the physical characteristics of the area,it is an effective method to quickly evaluate the prospecting prospects.The magnetic anomaly verification of Yuantan in Qingtai-Tanghe county,Sheqi county,Henan province was done through the high-precision magnetic sweep of 11 million ground,12 local abnormal areas were identified,the prospecting dam area was reduced;combined with the physical characteristics of the area,the comprehensive measurement of magnetic,heavy and electric profiles were selected,the data of SDC-05 high magnetic anomaly boreholes(ZK101、ZK201)in Lidian area and the magnetic parameters of core specimens in the working area were cited,and the anomaly was quickly determined to be caused by magnetite-minorized long rock mass through the positive and negative of magnetic,heavy and electric combined profile,and the magnetic body size and buried depth state were preliminarily determined.It is concluded that the rock mass has no obvious characteristics of magnetite differentiation and enrichment,which is not enough to form industrial orebody,and does not carry out drilling verification for the time being,thus saving exploration and construction funds.