新疆喀拉尕依沙地区地球化学异常信息的提取

Geochemical abnormal information extract in Kalagayisha Xinjiang

通过泛克里金法和多重分形滤波技术相结合的方法,对新疆喀拉尕依沙地区成矿能量异常信息进行分析,以此获取该地区不同层次的致矿异常信息。研究结果表明:1新疆喀拉尕依沙地区成矿能量的最大变程为2.4 km,最大变程的方向为310°,最大变程方向与研究区主断裂F1走向基本一致;该地区成矿能量变化主要受到区域内的主断裂F1控制,其成矿能量含量的变化表现出较强的结构性特征。2泛克里金法获得的异常与低通滤波获取的区域成矿能量的异常总体具有相似的空间分布特征,它们均反映了异常的分布趋势和浓集特征,具有明显的裂控-岩控特征。3多重分形滤波(S-A)法能够提取多层次的致矿异常信息,其中包括了成矿能量的区域异常和隐伏背景中的弱异常和隐蔽异常,通过对背景和异常信息的关联分析,得出有利于矿化的解释,指示隐伏矿床的分布位置,同时为寻求未知矿床提供新的启示。

Based on the universal Kriging method and Spectrum-Area（S-A） method, essential mineralization abnomal information in Kalagayisha areas, Xinjiang were analyzed, leadingto different levels of mine information. Results show that： ① Kalagayisha, Xinjiang mineralization can be one of the biggest variation range of 2. 4 km, the direction of the maximum codomain is 310°, the largest variation direction basically accords with the strike of the main faults F1 in the study area, suggestting that the region mineralization can change is mainly controlled by the regional main faults F1 fault. Changes in concentrations of mineralization can show strong structural features. ② The anomaly obtained by the Universal Kriging Method and the regional ore-forming energy anomalies obtained by the low-pass filter have similar spatial distribution characteristics as a whole. They all reflect the trend and concentration distribution characteristics of abnormal information, with obvious crack and rock control characteristics. ③The Spectrum-Area（S-A） method can extract the muhi-level ore anomalies information, including the regional anomalies and mineralization can concealed in the background of weak anomalies. Through correlation analysis of the background and anomaly exception information, the mineraliza- tion explanation is reached, indicating the distribution of concealed deposit location and providing a new relation of seeking the unknown deposit.