阿尔金山西部区域化探数据处理方法对比研究

分别采用常规统计法(对数)、EDA法和分形法(含量-频数法和含量-面积法)对阿尔金山西部地区水系沉积物As元素数据进行处理。不同方法所得结果相差较大,其中含量-面积法最大,常规统计法(对数)和EDA法次之,含量-频数法最小。通过对比异常圈定结果及与矿点对比情况认为,常规统计法(对数)确定的异常下限更适合本研究区,其它方法造成异常面积过大或过小,会给异常查证带来困难。因此,在实际工作计算异常下限之前要充分分析其原始数据分布规律,考虑其地球化学数据的分布模式,其次要与实际地质情况相结合,选择较适宜的异常下限计算方法。

Comparison of different processing methods for regional geochemical exploration data:Take the western Altun Mountain for example

The As element data of river sediments in the Western Altun Mountain were processed by conventional statistical method (logarithm), EDA method and fractal method (content-frequency method and content-area method). The results obtained by different methods vary greatly, among which the content - area method is the largest, the conventional statistical method (logarithm) and EDA method are the second, and the content - frequency method is the smallest. According to the results of abnormal delineation and comparison with the ore points, the abnormal lower limit determined by the conventional statistical method (logarithm) is more suitable for this study area, and the abnormal area caused by other methods is too large or too small, which will bring difficulties to the abnormal verification. Therefore, the original data distribution pattern should be fully analyzed before calculating the lower limit of anomaly in the actual work, and the distribution pattern of geochemical data should be considered. In addition, the calculation method of lower limit of anomaly should be selected in combination with the actual geological conditions.