对数泛克立格法在东天山土屋—延东地区Cu、Au异常信息提取中的应用

Application of Logarithmic Universal Kriging Method in the Extraction of Cu and Au Anomaly Information in Tuwu-Yandong Area of East Tianshan Mountains

基于泛克立格法提取的地球化学异常评价,可为区域勘查提供有用信息。通过统计特征分析,选用对数泛克立格法,以地理信息系统(GIS)平台为依托,获得东天山土屋—延东地区的Cu、Au异常信息。结果表明,①Cu含量变化受康古尔塔格深大断裂控制,Au异常的空间分布具有明显的随机性特征;②对数泛克立格法获取的区域Cu异常图与已知矿点套合,有南移的倾向,可能与风剥蚀、地形有关;③对数泛克立格法获取的区域Cu、Au异常分布基本包含已知矿点,且与传统方法获取的Cu、Au的地球化学异常区域相一致,验证了对数泛克立格法的可靠性。

Geochemical anomaly evaluation based on universal Kriging method can provide useful information for regional exploration.In this paper,through the analysis of statistical characteristics,the logarithmic universal Kriging method is used to obtain the abnormal information of Cu and Au in the eastern Tianshan Tuwu-Yandong area based on the geographic information system(GIS)platform.The results show that:①Cu content changes are controlled by the Kanggurtage deep fault,and the spatial distribution of Au anomaly has obvious random characteristics.②The regional Cu anomaly map obtained by logarithmic pankriging method is consistent with the known ore points,and has a tendency to move south,which may be related to wind erosion and topography.③The anomaly distribution of Cu and Au in the region obtained by the logarithmic Universal Kriging method basically includes the known ore points,and is consistent with the geochemical anomaly area of Cu and Au obtained by the traditional method,which verifies the reliability of the logarithmic Universal Kriging method.