首先介绍了优选向上延拓的思想及相关原理。通过理论模型试验,证实了优选向上延拓具有不过分衰减低频信号,能尽可能多地保留有用地质体信息的功能。根据优选向上延拓的这一特性,能够比较准确地提取区域异常,分离出局部异常。利用优选向上延拓处理了拜城区块实测的重力资料,获得了较好的成果。结合已有的地质资料,对处理成果进行了初步分析,初步圈定了该区找钾盐的有利靶区。为该区进一步的物探、地质工作打下了一定的基础。 First introduced the idea of ​​upward extension of the best and related principles. Through the theoretical model test, it is confirmed that it is preferable to extend upward the function of preserving useful geologic body information as much as possible without reducing the low frequency signal excessively. According to this feature of the preferred upward extension, it is possible to extract the regional anomaly more accurately and isolate the local anomaly. The results of gravimetric data measured in Baicheng block are optimized and extended upwards, and good results are obtained. Combined with the existing geological data, preliminary analysis of the treatment results, preliminary delineation of the region to find a favorable target area for potassium. Which laid a solid foundation for further geophysical and geological work in this area.