地面磁测和井中磁测在芦草滩磁铁矿勘查中的应用

The application of ground magnetic measurement and borehole magnetic measurement to the exploration of the Lucaotan magnetite deposit

通过地质普查工作,推断芦草滩矿区深部有较多盲矿体存在,有必要开展进一步的勘查找矿工作。利用1∶1万地面高精度磁测工作圈定磁异常、推断划分地质构造,对磁异常进行解释和研究,发现了隐伏磁铁矿。采用2.5D人机交互拟合对磁测剖面进行反演,进一步推断在深部存在隐伏磁性矿体。利用井中磁测预测井下、井旁盲矿体,有效指导了钻探工作。实践证明,地面磁测和井中磁测的有机结合,在芦草滩磁铁矿勘查中取得了显著的找矿效果。

Through geological survey, the authors inter that there are more blind orebodies at the depth of the Lucaotan mining area, and hence it is necessar^^ to carr^^ out further exploration. Using the 1 ？ 1 million ground high-precision magnetic measurement, the au-thors delineated the magnetic anomalies, inferred and divided the geological structures. Through interpretation and study of the magnetic- anomalies ,the authors found the hidden magnetite orebody. By using the 2.5D human-computer interactive inversion technique the au-thors inferred that there exist hidden magnetic orebodies at the depth. Borehole magnetic measurement plays an important role in guiding drilling work. Practice has proved that the organic combination of ground magnetic measurement and borehole magnetic measurement in the exploration of the Lucaotan magnetite deposit has made significant prospecting effect.