井中三分量磁测在青海尕林格铁多金属矿的应用

尕林格铁多金属矿区为戈壁荒漠,第四系覆盖层厚度在120~200 m之间,钻探工程后进行三分量井中磁测是最为直接的寻找井底、井旁等盲矿体的方法.通过对尕林格矿区钻孔的三分量井中磁测资料分析,深入研究ΔZ、ΔH′曲线及ΔT′矢量的变化规律,在寻找钻井四周和深部隐伏的矿体,科学指导布设钻孔减少钻探工作量,以及指导钻孔施工进度,提高见矿命中率,取得了良好的效果.三分量井中磁测在矿区已经成为必不可少的方法之一.

THREE-COMPONENT BOREHOLE MAGNETIC SURVEY IN THE GALINGE IRON POLYMETALLIC DEPOSIT IN QINGHAI PROVINCE

The Galinger iron polymetallic orefield is located Gobi desert, covered by Quaternary layer of 120 -200 meterthick.After the drilling project, three-component magnetic survey in boreholes is the most direct way to search blind orebodies in the bottom ofor nearby the holes.Based on the analysis of thethree-component borehole magnetic surveydata in the Galinger orefield, the authors research thechange rule of ΔZ and ΔH'curves and ΔT'vector.In the seeking oforebodies around the borehole and in the deep, this method is effective to guidethe distribution of drill holes scientifically and promote the probabilityof positive drill hole.