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黄土塬区地形起伏大,地表黄土切割剧烈。地形起伏导致黄土厚度巨大变化,由于黄土密度与下伏地层之间存在较大的密度差异,由此产生了具有一定幅值的高频重力异常,并给重力勘探资料的处理、解释带来了困难。在SHJZ构造带高精度重力勘探中,综合运用了地形校正和黄土校正技术,有效地克服了由于地形起伏和黄土厚度变化对重力勘探产生的不利影响,取得了精确的重力资料。并将该重力异常,结合其它物探资料进行综合解释,对圈定局部构造发挥了积极的作用。
The loess plateau area has a large topography, intense ground loess cutting. Due to the large density difference between the loess density and the underlying strata, there is a great amplitude of high-frequency gravity anomalies and the processing and interpretation of the gravity exploration data are brought difficult. In the SHJZ structural belt with high-precision gravity exploration, the terrain correction and loess correction techniques are comprehensively used to effectively overcome the adverse effects on the gravity exploration due to the fluctuation of the topography and the thickness of the loess and obtain accurate gravity data. And the gravity anomaly, combined with other geophysical data for a comprehensive interpretation of the delineation of the local structure has played an active role.