EH4电导率成像系统在包头地热勘查中的应用

EH-4电导率成像系统采取了单点进行音频大地电磁测深(AMT)的测量方式,既保证了测量的精度又能很好地克服地形地物对物探勘察的工作布置限制,而且还具备了探测深度的优势。在呼包盆地地热勘探实践应用中,AMT法对于深大断裂(尤其是对呼包盆地中包头隆起带产生的一系列的凹陷区与隆起区的分界断裂所引起的电性特征差异)都有着较好的反映,其反演电阻率断面等值线图较清晰地反映了地热田导水导热断裂构造的地热地质特征。可以说,EH-4系统在本次勘查任务中取得了很好的勘探效果,完全达到了勘查要求。

Application of EH4 Electrical Conductivity Imaging System on the Geothermal Exploration in Baotou

The EH-4 electrical conductivity imaging system adopted the single-point measurement of the audio magneto telluric sounding(AMT),which can not only ensure the accuracy of measurement but also overcome the limitations of the terrain on the layout of geophysical investigation,and has the advantage in the detection depth.The application of the AMT method in the geothermal exploration of the Hubao basin showed it can reflect the electric characteristics differences caused by the deep fault,especially a series of dividing faults between the recessed area and the rising area in the Baotou uplift zone of the Hubao basin.The isograms of inversion resistivity in the cross sections can reflect the geological and geothermal characteristics of the water conducted and thermal conductivity fracture structure in the geothermal field.Overall,the EH-4 system provided good exploration results,which met the exploration requirements.