不同方法在哈拉乔拉化探数据处理中的应用对比

Application and comparison of different geochemical data processing methods used in Halaqiaola area

化探数据处理是勘查地球化学的重要环节。本文采用传统统计法、多重分形法、背景高程模型法,通过对阿尔泰哈拉乔拉地区1:50000铜元素地球化学异常信息的提取,分析对比了三种方法的特点及差异,结果显示:传统统计法确定的异常面积小,受地质背景影响大;多重分形法确定的异常下限太低,基本相当背景平均值;背景高程模型法异常随背景变化而变化,能圈出弱背景区异常。

Data processing has a key importance in geochemical exploration.This paper discussed the peculiarity and difference of three methods for extracting regional geochemical anomalies of Cu on a scale of 1:50000 in Halaqiaola area,they are traditional statistical method,multifractal method and background altitude surface model.As a result,the geochemical anomalies delineated by traditional statistical method are small and easily affected by geology background;multifractal method give a low limitation level about anomalies which approximate to the average concentration;anomalies got by background altitude surface model vary with area,it can delineate anomalies in those area that has a low background element concentration.