分离重力区域场与局部场的Matlab趋势分析法  

THE TREND ANALYSIS OF SEPARATING REGIONAL GRAVITY FIELD AND LOCAL FIELD BY USING MATLAB

作　　者：吴琼 秦丽丽[2] 

机构地区：[1]甘肃省地矿局第一地勘院,甘肃天水741020 [2]西北工业大学自动化学院,陕西西安710129

出　　处：《甘肃地质》2012年第2期88-92,共5页Gansu Geology

摘　　要：趋势分析法作为场分离的一种方法,当地形情况复杂、测区面积较大时,往往很难达到场分离的要求。文章通过改变多项式数学模型的阶次,选择最优的多项式数学模型进行趋势分析。通过对剖面趋势分析和曲面趋势分析的对比得知,在同一地质模型上剖面趋势分析效果较曲面趋势分析效果好,由此运用切割法将叠加异常数据直接截取,获得多个剖面进行趋势分析,再由剖面趋势分析得到曲面趋势分析。实验结果表明趋势分析效果理想,能达到场分离的要求。As a method of field separation, when complicated terrain, larger measuring area, the trend analysis is difficult to achieve the requirements of separating. In this paper, through changing the order of the polynomial mathematical model, and select the optimal mathematical model of polynomial trend analysis. Comparing the result of profile trend and surface trend, in the same geological model profile trend analysis method achieves better result. Thus using cutting method to get abnormal data directly, and then get more profile trend to analyze. In the end, achieve surface trend analysis. The experiments show that the trend analysis result is ideal, and reaches the requirement of field separation.

关 键 词：重力异常 趋势分析 区域异常 局部异常 切割法 

分 类 号：P631.1[天文地球—地质矿产勘探]