高精度磁法测量在龙岩马坑铁矿中的应用

根据高精度磁法测量在龙岩马坑铁矿磁异常的分布情况,圈定测区东南段为规模较大的正负伴生异常,大致以官寮坑—太保林为界,东南为正异常,西北为负异常.走向北东,西南向未闭合.△T磁异常长度大于3 200 m,宽度800～2 300m.通过磁异常反演情况推测地下磁性体呈板状体,埋深在标高-200～-400 m,磁性体厚度约30 m,倾角约30°.经钻孔验证,磁铁矿体出现在标高-200～-400m,视厚度30.68 m.根据地质验证结果,工作区东南部的△T磁异常证实是由地下磁铁矿体所致,从而证实了高精度磁法在寻找磁铁矿床具有较高的应用效果.

Application of high precision magnetic survey in Makeng Iron Mine,Longyan County

Based on the magnetic anomaly distribution by high precision magnetic survey in Mak eng mining. By measuring the delineation of high precision magnetic survey area south east or larger associated anomalies, the officer Liao Keng Tai Baolin as, Se positive anomalies, North West as negative anomalies. Towards the North East, southwest is not closed. A T magnetic anomaly is more than 3200m in length, width 800--2300m. Through the inversion of magnetic anomaly that underground magnetic body is a plate body, buried deep in the ele- vation of --200m to --400m, the magnetic body thickness of about 30m, dip angle of about 30 ~. The ZK7521 drilling verification, magnet orebody appears in the elevation of --200m to --400m, as the thickness of 30.68m. According to the geological results, Southeast of A T magnet anomaly is confirmed by a magnet induced by underground ore body, thus confirming the high precision magnetic method in application for magnetite deposit with high, provide geophysical basis for the search for hidden magnetite ore.