功率谱法在银额盆地居延海坳陷磁测异常解释中的应用

The application of power spectrum method in Yin-E basin Juyanhai depression magnetic anomaly interpretation

在高精度磁测数据精细处理解释中,通常需要定量解释磁性体的深度信息,对于研究区域地质构造、岩浆岩发育和找矿分析研究都具有重要意义。功率谱法是计算磁性体深度的常用方法,但由于程序采用滑动窗口的方法,参数选择存在主观性,会造成计算误差。笔者通过人机交互2.5D重、磁联合反演拟合和钻井资料对比分析,甄选最佳参数组合,利用功率谱法反演计算了银额盆地居延海坳陷磁性体的埋深信息。

In fine precision magnetic survey data processing and interpretation usually requires quantitative interpretation of the magnetic body depth information for the study of regional tectonic,magmatic rocks and ore analysis also has important significance. Power spectrum method is a common method for calculating the depth of the magnetic material but the program uses the sliding window method.And parameter selection subjectivity can cause a calculation error. The author through computer interaction 2. 5D gravity and magnetic joint inversion fitting and drilling data comparative analysis,select the optimal parameter combination,uses the power spectrum method to calculate the depth information of magnetic substance in Yin-E basin Juyanhai depression.