利用井中三分量磁测ΔT三维异常体特征分析磁铁矿体产状——以山东省兰陵县兰陵矿区古林矿段为例

Analysis on the Occurrence of Magnetite Ore Body by Using Three Component Magnetic Survey in the Well——Setting Lanling Mining Area of Lanling County in Shandong Province as an Example

摘要:

常规的单孔井中三分量磁测能在二维空间上较准确地判断磁性地质体的方位和大致空间位置，该文利用群孔井中三分量磁测实现在三维空间上对磁性地质体赋存状态的准确判定，特别是ΔT磁参量，能更准确、更清晰地反映磁性地质体的三维空间形态。对古林矿区群孔井中三分量磁测数据进行整理后，利用Voxler软件进行井中三分量磁测ΔT磁异常三维立体成图，利用各岩性已知磁性参数特征，圈定可推断为矿致的ΔT三维异常体。通过对圈定的矿致三维异常体的分析，正确的推断了本矿区磁铁矿体的空间赋存状态，为该矿区勘查工作的顺利进行，起到了有力的推动作用。

Abstract:

In the conventional single-hole well, three-component magnetic measurement can accurately determine the orientation and approximate spatial position of the magnetic geological body in two-dimensions. In this paper, three-component magnetic measurement in the group hole well is used to realize the magnetic geological body in three-dimensional space. The accurate determination of the state, especially the △T magnetic parameter, can more accurately and clearly reflect three-dimensional shape of the magnetic geological body. In this paper, through magnetic data in the wells of Gulin mining area, the Voxler software is used to carry out the three-dimensional mapping of the magnetic anomaly △T magnetic anomaly in the well. Using the characteristics of the known magnetic parameters of each lithology, the △T three-dimensional can be inferred to be mine-induced. The abnormal body, through the analysis of the three-dimensional anomaly caused by the ore, correctly infers the spatial occurrence state of the magnetite body in the mine area, which plays a powerful role in promoting the progress of the exploration work in the mine area.