中文摘要：

位场分离方法在重、磁数据处理和解释中发挥着重要作用,本文重点研究了空间域中常用的平均场值法、向上延拓法、圆周法、趋势分析法等四种方法的基本原理,通过模型试验对比分析了不同方法的场分离效果,并将四种方法应用到了相山布格重力异常的分离之中.模型试验及实例应用表明,平均场值法和圆周法的场分离效果较为理想,但圆周法分离出的区域场存在局部波动现象;向上延拓法难以将区域异常和局部异常彻底分离;趋势分析法分离出的局部场中含有明显的虚假异常.因此,就这四种场分离方法而言,选择平均场值法具有更好的实际应用价值.

英文摘要：

Potential field separation plays an important role in the data processing and interpretation of gravity and magnetic exploration. In this paper we focus on the mean-field method,upward continuation,circumference law method and trend analysis.Compared and analyzed on the field separation results of different methods using three model tests, and the four field separation methods are applied in bouguer gravity data of Xiangshan orefield.The combined model tests and the application show that the meanfield method and circumference law method can obtain better results than the other two methods,but there has local fluctuation using circumference law method. The upward continuation cannot completely separate the regional and residual field,and the residual field has false anomaly using the trend analysis. Therefore,the mean-field method can obtain better results in the real data processing when it is compared with the other three methods mentioned in this paper.