地面综合物探方法在浅覆盖区地质填图单元的划分研究

由于浅覆盖区的特殊地貌，给区域地质填图带来一定的困难。本文依据不同岩性的磁化率和放射性元素含量差异，讨论了不同填图单元地面磁法测量与地面伽玛能谱测量曲线关系。通过实测剖面的分析，得到大兴安岭火成岩区不同填图单元磁测异常曲线与放射性异常曲线的相关关系，从而用来快速确定浅覆盖区下填图单元边界，以减少槽探工程，减轻地质人员的工作强度。

Division scheme of the geological mapping units in shallow cover areas based on ground integrated geophysical methods

Because of the special geomorphology in areas of shallow overburden, it is difficult to delimit the boundary between mapping units in regional geological mapping. This paper discusses the curve relation between ground magnetic survey and ground gamma spectrometry survey on the basis of the difference in magnetization and radioactive element content for different mapping units. By analyzing the measured profile, the relation between the magnetic anomaly curve and radioactive anomaly curve has been obtained for different mapping units in the Da Hinggan igneous province. This method can apply for delimiting a boundary between mapping units quickly in a shallow overburden area so as to reduce trenching work and abate the work intensity.