Gravity exploration as an important geophysical method has been widely applied to actual production. local anomaly extraction is an important part of gravity data processing, and also the prerequisite of inverse interpretation. In actual production, the collected gravity data is often the superimposed anomaly of a variety of geological factors, which is a comprehensive reflection of different size and depth of the geological body. It contains a lot of information. It is of great practical value to extract local anomaly caused by rock (ore) body in such complex information and then study the local anomaly and solve the relevant geological problems. Trend analysis as an important means to extract gravity anomaly is worth further study and application.%重力勘探作为一种重要的地球物理勘探方法已被广泛应用到实际生产中,局部异常的提取是重力数据处理重要环节之一,也是反演解释的前提条件.在实际生产当中,我们采集到的重力数据,往往是各种地质因素的叠加异常,是不同规模和埋深的地质体的综合反映,包含了大量的信息.从这样错综复杂的信息中提取出我们感兴趣的岩(矿)体引起的局部异常,再对其进行研究并解决相关的地质问题,具有十分重大的实用价值.趋势分析法作为重力异常提取的一种重要手段值得我们进一步的学习与应用.
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