重力优选向上延拓技术在拜城凹陷找盐(钾盐)的应用

The Application of Gravity Preferential Upward Continuation in Baicheng Sunken Finding Salt (Potassium Salt)

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。

This paper first introduced the ideas of preferential upward continuation and the related principles.The preferential continuation operator has been proved by theoretical models tested that it has these advantages：when it is used for upward continuation,the low frequent signal does not be attenuated excessively and can retain as much information on geological features as possible.By this feature,it can be used to separate the potential field anomalies.The author used the method of the preferential continuation to process the gravity data of Baicheng block.Combined with the existing geological data,the author analyzed the result and acquired the useful result.The result is helpful for the further work of the geophysics and geology in this area.