现场XRF数据处理中多重分形方法研究

MULTI FRACTAL METHODS RESEARCH IN DATA PROCESSING OF IN-SITU X-RAY FLUORESCENCE

化探异常信息提取是地球化学勘查工作中的核心任务,使用不同方法提取异常信息导致的差异将对异常范围的判断造成影响。这里以新疆西天山地区现场X荧光土壤化探数据为例,尝试将多重分形方法中的含量求和法推广至五段直线进行拟合计算,据此确定工区内As、Sr两种元素正异常下限值与负异常上限值,结合研究区地质背景对异常区域进行综合解释,并与传统统计方法圈定的异常范围进行比较后发现:五段式拟合含量求和法对正异常的圈定结果与传统方法一致性较高,且在负异常的圈定上取得了较为显著的效果。

The information extraction of geochemical anomalies data is the core task of the geochemical exploration.Using different ways to extract unusual information that differences will make the striking influence on anomaly scope.The article takes the in-situ X-ray fluorescence geochemical exploration soil sample data as an example in mountain of western Tianshan area of XinJiang to try to popularize the content-summation method of multi fratical methods to fit calculation the five period of lineaments.According to the results,it is ensured that the lower limit of positive anomaly and the upper limit of negative anomaly of the As and Sr in study area.Combining with regional geological background of anomaly comprehensive explanation of the study area,and comparing with the traditional statistics method of delineating anomaly range,it was found that five zones fitting content-summation method get the high consistency on the positive anomaly delineated results,and make the expected effect in delineating the negative anomaly.