铁矿探测EH-4的分析与应用

EH-4连续电导率成像系统是新一代数字化的电磁法仪器。分析了EH-4观测信号经离散傅里叶变换后，不同频率时长的傅立叶变换不可避免地产生信号频谱泄露。并在分析不同尺度窗口函数的特点及其作用的基础上，结合铁矿探测实践中对信号的分析与处理，用于指导找矿实践，应用表明，用EH-4开展铁矿探测所圈定的地球物理异常可以确定地下矿体的存在和矿体地下延伸状况。

Analysis and Application of EH-4 in Iron Deposit Exploration

EH-4 continuous conductivity imaging system is a new generation digitalized electromagnetic-method instrument. The paper analyzes the unavoidable signal spectral leakage due to the Fourier transform of EH-4 observation signals under different frequencies. Meanwhile, based on the analysis of the features and functions of the different scaled windows and in combination with the practical signal analysis and disposal in iron deposit exploration, it was used to guide the ore prospecting practice. The application shows that the geo-physical abnormality detected by EH-4 in iron deposit exploration can be used to determine the existence of the underground ore body and the its underground extension.