重磁方法在程家村隐伏磁铁矿勘查中的应用

Application of Gravity and Magnetic Methods in Prospecting Buried Magnetite Deposit in Chengjiacun

摘要:

为了验证程家村航磁异常圈闭，对该异常圈闭进行了查证工作，针对该区域铁矿体均呈深部隐伏的赋存状态，以“物探先行，钻探验证”的工作方法开展工作，利用地面高精度磁测扫面确定磁异常圈闭平面形态及位置；对高精度磁测剖面数据进行切线法剖面反演，确定强磁性地质体位置和埋深，再结合重磁剖面联合反演方法，推断强磁性地质体的赋存状态,从而给钻探验证提供依据。通过上述工作，取得了良好的找矿效果,表明重磁方法是深部隐伏磁铁矿勘查中的重要工作手段。

Abstract:

In orfer to verify aeromagnetic anomaly traps in Chengjiacun, the abnormal traps has been verified. Iron ore bodies show deep concealed occurrence, so the working method of "first carrying out geophysical exploration and then drilling” has been used in this area. By using ground highprecision magnetic measurement scanning, plane shape and position of magnetic anomaly trap has been determined. High precision magnetic profile data has been inverted by using tangential section, and position and depth of strong magnetic geological bodies have been determined. Combining with the method of joint inversion of gravity and magnetic section, the occurrence of strong magnetic geologic bodies has been inferred. It will provide a basis for drilling verification. The above work has achieved good results. It is showed that the gravity and magnetic method is an important method in the exploration of deep concealed magnetite deposit.